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5A4 2 ANTI-LOCK BRAKE SYSTEM (ABS)

EHCU and Associated Parts ...................... 5A4 51Removal ..................................................... 5A4 52Installation .................................................. 5A4 52

Front Speed Sensor....................................... 5A4 53Front Speed Sensor and Associated Parts 5A4 53Removal ..................................................... 5A4 53Inspection and Repair................................. 5A4 53Installation .................................................. 5A4 54

Front Speed Sensor Rotor............................. 5A4 55Front Speed Sensor Rotor and AssociatedParts........................................................... 5A4 55Removal ..................................................... 5A4 55Inspection and Repair................................. 5A4 56

Installation................................................... 5A4 56Rear Speed Sensor....................................... 5A4 57

Rear Speed Sensor and Associated Parts . 5A4 57Removal...................................................... 5A4 58Inspection and Repair................................. 5A4 58Installation................................................... 5A4 58

Rear Speed Sensor Rotor ............................. 5A4 59Rear Speed Sensor Rotor and AssociatedParts........................................................... 5A4 59Removal...................................................... 5A4 59Inspection and Repair................................. 5A4 59Installation................................................... 5A4 59Special Tools .............................................. 5A4 61

Service PrecautionCAUTION: Always use the correct fastener in theproper location. When you replace a fastener, useONLY the exact part number for that application.ISUZU will call out those fasteners that require areplacement after removal. ISUZU will also call outthe fasteners that require thread lockers or threadsealant. UNLESS OTHERWISE SPECIFIED, do notuse supplemental coatings (Paints, greases, or other corrosion inhibitors) on threaded fasteners or fastener joint interfaces. Generally, such coatingsadversely affect the fastener torque and the jointclamping force, and may damage the fastener.

When you install fasteners, use the correcttightening sequence and specifications. Followingthese instructions can help you avoid damage toparts and systems.

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ANTI-LOCK BRAKE SYSTEM (ABS) 5A4 3

General DescriptionThe Anti-lock Brake System (ABS) works on all four

wheels. A combination of wheel speed sensor andElectronic Hydraulic Control Unit (EHCU) can determine

when a wheel i s about to stop turning and adjust brakepressure to maintain best braking.This system helps the driver maintain greater control of the vehicle under heavy braking conditions.

LNW35ALF000301

EndOFCallout

System ComponentsThe Anti-lock Brake System consists of a HydraulicUnit, Electronic Hydraulic Control Unit (EHCU), fourWheel Speed Sensors and Warning Light.

Electronic Hydraulic Control Unit (EHCU)

The EHCU consists of ABS control circuits, faultdetector, and a fail-safe. It drives the hydraulic unitaccording to the signal from each sensor, cancelling

ABS to return to normal braking when a malfunction hasoccurred in the ABS.

The EHCU is self-diagnosing function which canindicate faulty circuits during diagnosis.The EHCU is located behind the glove box.

Hydraulic Unit (HU)The hydraulic unit is mounted on the frame near therear spring front bracket. It consists of a Motor, PlungerPump, Solenoid Valves and Check Valve.On the outside, the relay box containing a motor relayand a valve relay is installed.Solenoid Valves: Reduces or holds the caliper fluidpressure for each front disc brake or both rear drumbrakes according to the signal sent from the EHCU.Reservoir: Temporarily holds the brake fluid that returnsfrom the front and rear wheel brake so that pressure of front wheel brake can be reduced smoothly.Plunger Pump: Feeds the brake fluid held in thereservoir to the master cylinder.Motor: Drives the pump according to the signal fromEHCU. Check Valve: Controls the brake fluid flow.

Legend(1) Hydraulic Line(2) Electronic Line(3) Electronic Hydraulic Control Unit (EHCU)(4) Front Wheel Speed Sensor(5) Rear Wheel Speed Sensor

(6) Powertrain Control Unit Module (PCM)(7) Load Sensing Proportioning Valve (LSPV)(8) Battery(9) ABS Warning Light

(10) Brake Switch(11) Data Lint Connector

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ABS Warning Light

LNW35ASH000101

Vehicles equipped with the Anti-lock Brake Systemhave an amber ABS warning light in the instrumentpanel. The ABS warning light will illuminate if amalfunction in the Anti-lock Brake System is detectedby the Electronic Hydraulic Control Unit (EHCU). Incase of an electronic malfunction, the EHCU will turnON the ABS warning light and disable the Anti-lockbraking function.The ABS light will turn ON" after the ignition switch isto the ON position.

ABS light will normally go on and off two times andthen will go out after the engine starting.If the ABS light comes ON" and stays ON whiledriving, the Anti-lock Brake System should be inspectedfor a malfunction according to the diagnosis procedure.

Wheel Speed Sensor (WSS)

It consists of a sensor and a rotor. The sensor isattached to the knuckle on the front wheels and to thebracket on the brake back plate on the rear wheels.The front speed sensor is coil type and rear is Hall ICtype.

The sensor rotors press-fitted to front and rear wheelhubs output pulse frequency depending on wheelrotation.The speed sensors find vehicle speed from itsfrequency.

Normal and Anti-lock BrakingUnder normal driving conditions, the Anti-lock BrakeSystem functions the same as a standard powerassisted brake system. However, with the detection of

wheel lock-up, a slight bump or kick-back will be felt i nthe brake pedal. This pedal bump will be followed by aseries of short pedal pulsations which occurs in rapidsuccession. The brake pedal pulsation will continue untilthere is no longer a need for the anti-lock function oruntil the vehicle is stopped. A slight ticking or popping

noise may be heard during brake applications when the Anti-lock features is being used.When the Anti-lock feature is being used, the brakepedal may rise even as the brakes are being applied.This is also normal. Maintaining a constant force on thepedal will provide the shortest stopping distance.

Brake Pedal Travel

Vehicles equipped with the Anti-lock Brake System maybe stopped by applying normal force to the brake pedal.

Although there i s no need to push the pedal beyond thepoint where it stops or holds the vehicle, by applyingmore force the pedal will continue to travel toward thefloor.This extra brake pedal travel is normal.

Acronyms and Abbreviations

Several acronyms and abbreviations are commonlyused throughout this section:

ABS Anti-lock Brake System

CKTCircuit

DLCData Link Connector

DTCDiagnostic Trouble Code

DVMDigital Volt Meter (High Impedance Multimeter)

EHCUElectronic Hydraulic Control Unit

FLFront Left

FRFront Right

GENGenerator

HUHydraulic Unit

MVMillivolts

RLRear Left

RRRear Right

RPSRevolution per Second

SWSwitch

VDC Volts DC

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VAC Volts AC

W/LWarning Light

WSSWheel Speed Sensor

General DiagnosisGeneral Information

ABS malfunction can be classified into two types, those which can be detected by the ABS warning light andthose which can be detected as a vehicle abnormalityby the driver.In either case, locate the fault in accordance with theBASIC DIAGNOSTIC FLOWCHART and repair.

Please refer to Section 5A for the diagnosis of mechanical troubles such as brake noise, brake judder(brake pedal or vehicle vibration felt when braking),uneven braking, and parking brake trouble.

ABS Service PrecautionsRequired Tools and Items:

Box Wrench

Brake Fluid

Special ToolSome diagnosis procedures in this section require the

installation of a special tool.

J-39200 High Impedance Multimeter

When circuit measurements are requested, use a circuittester with high impedance.

Computer System Service PrecautionsThe Anti-lock Brake System interfaces directly with theElectronic Hydraulic Control Unit (EHCU) which is acontrol computer that is similar in some regards to theEngine Control Module. These modules are designed to

withstand normal current draws associated with vehicle

operation. However, care must be taken to avoidoverloading any of the EHCU circuits. In testing foropens or shorts, do not ground or apply voltage to anyof the circuits unless instructed to do so by theappropriate diagnostic procedure. These circuits shouldonly be tested with a high impedance multimeter(J-39200) or special tools as described in this section.Power should never be removed or applied to anycontrol module with the ignition in the ON position.Before removing or connecting battery cables, fuses orconnectors, always turn the ignition switch to the OFF position.

General Service PrecautionsThe following are general precautions which should beobserved when servicing and diagnosing the Anti-lockBrake System and/or other vehicle systems. Failure toobserve these precautions may result in Anti-lock BrakeSystem damage.

If welding work is to be performed on the vehicleusing an electric arc welder, the EHCU and valveblock connectors should be disconnected before the

welding operation begins. The EHCU and valve block connectors should

never be connected or disconnected with theignition ON .

The Hydraulic Unit of the Anti-lock Brake Systemare not separately serviceable and must bereplaced as assemblies. Do not disassemble anycomponent which is designated as non-serviceablein this Section.

If only rear wheels are rotated using jacks or drumtester, the system will diagnose a speed sensormalfunction and the ABS warning light willilluminate. But actually no trouble exists. Afterinspection stop the engine once and re-start it, thenmake sure that the ABS warning light does notilluminate.

If the battery has been dischargedThe engine may stall if the battery has been completelydischarged and the engine is started via jumper cables.This is because the Anti-lock Brake System (ABS)requires a large quantity of electricity. In this case, waituntil the battery is recharged, or set the ABS to anon-operative state by removing the fuse for the ABS.

After the battery has been recharged, stop the engineand install the ABS fuse. Start the engine again, andconfirm that the ABS warning light does not light.

Note on Intermittents As with virtually any electronic system, it is difficult toidentify an intermittent failure. In such a case duplicatingthe system malfunction during a test drive or a gooddescription of vehicle behavior from the customer maybe helpful in locating a most likely failed component orcircuit. The symptom diagnosis chart may also be usefulin isolating the failure. Most intermittent problems arecaused by faulty electrical connections or wiring. Whenan intermittent failure is encountered, check suspectcircuits for:

Suspected harness damage.

Poor mating of connector halves or terminals notfully seated in the connector body (backed out).

Improperly formed or damaged terminals.

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Test Driving ABS Complaint VehiclesIn case that there has been an malfunction in thelighting pattern of ABS warning light, the fault can belocated in accordance with the DIAGNOSIS BY ABS WARNING LIGHT ILLUMINATION PATTERN . In caseof such trouble as can be detected by the driver as avehicle symptom, however, it is necessary to give a testdrive following the test procedure mentioned below,thereby reproducing the symptom for trouble diagnosison a symptom basis:

1. Start the engine and make sure that the ABS W/Lgoes OFF. If the W/L remains ON, it means that theDiagnostic Trouble Code (DTC) is stored.Therefore, read the code and locate the fault.

2. Start the vehicle and accelerate to about 30 km/h(19 mph) or more.

3. Slowly brake and stop the vehicle completely.

4. Then restart the vehicle and accelerate to about 40km/h (25 mph) or more.

5. Brake at a time so as to actuate the ABS and stopthe vehicle.

6. Be cautious of abnormality during the test. If the W/ L is actuated while driving, read the DTC and locatethe fault.

7. If the abnormality is not reproduced by the test,make best efforts to reproduce the situationreported by the customer.

8. If the abnormality has been detected, repair inaccordance with the SYMPTOM DIAGNOSIS .

NOTE: Be sure to give a test drive on a wide, even road

with little traffic.

If an abnormality is detected, be sure to suspendthe test and start trouble diagnosis at once.

ABS Warning LightWhen ABS trouble occurs and actuates when possiblethe ABS warning light, the trouble code correspondingto the trouble is stored in the EHCU. Only the ordinarybrake system is available when the ABS is turned off.When the ABS warning light is actuated, if the starterswitch is set ON after setting it OFF once, the EHCUchecks up on the entire system and, if there is noabnormality, judges ABS to work currently and the

warning light works normally even though the troublecode is stored.

NOTE: Illumination of the ABS warning light indicatesthat anti-lock braking is no longer available. Powerassisted braking without anti-lock control is stillavailable.

Normal OperationABS Warning LightWhen the ignition is first moved from OFF to ON , theamber ABS warning light will turn ON . The ABS

warning light will blink twice and will turn OFF afterengine is started.

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Circuit Diagram

LNW35AXF000501

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Connector List

LNW35AXF000201

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LNW35AXF000401

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Part Location

LNW35AXF000301

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EHCU (Electronic Hydraulic Control Unit)

LNW35ALF000101

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Legend(1) Master Cylinder (front)

(2) Master Cylinder (rear)(3) Rear Right Wheel Cylinder

(4) Rear Left Wheel Cylinder(5) Front Right Wheel Cylinder

(6) Front Left Wheel Cylinder

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EHCU Pin outs

LNW35ASF000201

Pin No Pin Function Wire Color Typical Value Note

1 Ground BLK 0V (Less than 0.1V) Solenoid, Control Unit

2 Power supply RED Battery Voltage Motor

3 Starter Switch ON (Power Supply andSwitch Position)

BLK/YEL Battery Voltage Control Unit

4 Diag Switch (DLC) WHT/BLU Open : More than4.5V

Close : Less than1.5V

Close Condition : Shortto GND

5 Not Used

6 ABS Warning light WHT/GRN More than 10V Relay Coil resistance266 10

7 (Exhaust Brake Cut Signal { IN }) LT GRN Battery Voltage(IN) -(OUT)

Jumper Wire

8 (Exhaust Brake Cut Signal { OUT }) LT GRN Battery Voltage(IN) -(OUT)

Jumper Wire

9 Not Used

10 Front Right Wheel Speed Sensor (+) PIN 1 2 k Value : (+)

()

More than 200mV (0.5

revolution/second)11 Front Right Wheel Speed Sensor ( ) BLU 1 2 k

Value : (+) ()More than 200mV (0.5revolution/second)

12 Rear Right Wheel Speed Sensor ( ) WHT 0.2 4.5V Value : (+) ()

0.5 revolution/secondWheel Speed Sensorsignal

13 Not Used

14 Not Used

15 Not Used

16 Stop Light Switch GRN Open : 0V Close :Battery Voltage

Close Condition : Stepon the Brake Pedal

17 Not Used

18 Not Used

19 Not Used

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20 Not Used

21 Rear Right Wheel Speed Sensor (+) WHT 0.2 4.5V Value : (+) ()

0.5 revolution/secondPower supply 12V

22 Rear Left Wheel Speed Sensor (+) BLU 0.2 4.5V Value : (+) ()

0.5 revolution/secondPower supply 12V

23 Ground BLK 0V (Less than 0.1V) Motor

24 Power supply RED Battery Voltage Motor

25 Not Used

26 Not Used

27 Not Used

28 Not Used

29 Serial ORG/BLK J1850 Class 2Communication)

30 Not Used 31 Not Used

32 Front Left Wheel Speed Sensor (+) VIO 1 2 k Value : (+) ()

More than 200mV (0.5revolution/second)

33 Front Left Wheel Speed Sensor ( ) RED/BLK 1 2 k Value : (+) ()

More than 200mV (0.5revolution/second)

34 Rear Left Wheel Speed Sensor ( ) YEL 0.2 4.5V Value : (+) ()

0.5 revolution/secondWheel Speed Sensorsignal

Pin No Pin Function Wire Color Typical Value Note

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Tech 2 Scan ToolFrom 98 MY, Isuzu dealer service departments arerecommended to use Tech 2. Please refer to Tech 2scan tool user guide.

901RW180

EndOFCallout

Legend(1) PCMCIA Card(2) RS 232 Loop Back Connector

(3) SAE 16/19 Adapter(4) DLC Cable(5) Tech 2

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Tech 2 Features1. Tech 2 is a 12 volts system. Do not apply 24 volt.

2. After connecting and/or installing the VehicleCommumications Interface (VCI) module, PCMCIAcard and DLC connector to the Tech 2, connect thetool to the vehicle DLC.

3. Make sure the Tech 2 is powered OFF whenremoving or installing the PCMCIA card.

4. The PCMCIA card has a capacity of 10 Megabytes which is 10 times greater than the memory of theTech 1 Mass Storage Cartridge.

5. The Tech 2 has the capability of two snapshots.

6. The PCMCIA card is sensitive to magnetism andstatic electricity, so care should be taken in thehandling of the card.

7. The Tech 2 can plot a graph when replaying asnapshot.

8. Always return to the Main Menu by pressing theEXIT key several times before shutting down.

9. To clear Diagnostic Trouble Codes (DTCs), open Application Menu and press F1: Clear DTC Info .

Getting Started Before operating the Isuzu PCMCIA card with the

Tech 2, the following steps must be performed:1. The Isuzu 2000 Model year System PCMCIA card

(1) inserts into the Tech 2 (5).

2. Connect the SAE 16/19 adapter (3) to the DLCcable (4).

3. Connect the DLC cable to the Tech 2 (5).4. Make sure the vehicle ignition is off.

5. Connect the Tech 2 SAE 16/19 adapter to thevehicle DLC.

826LY003

6. Turn on the vehicle ignition.

7. Power the Tech 2 ON and verify the Tech 2 powerup display.

060RW009

NOTE: The RS232 Loop back connector is only to usefor diagnosis of Tech 2. Refer to user guide of the Tech2.

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Operating Procedure (For Example)The power up screen is displayed when you power upthe tester with the Isuzu systems PCMCIA card. Follow the operating procedure below.

060R100102

060MY004-X

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Menu

The following table shows which functions are usedfor the available equipment versions.

060MY005

DTC Modes

060MY005

There are two options available in Tech 2 DTC mode todisplay the enhanced information available. Afterselecting DTC, the following menu appears.

DTC Info

Clear Info

060MY001

The following is a brief description of each of the submenus in DTC Info and DTC. The order in which theyappear here is alphabetical and not necessarily the waythey will appear on the Tech 2.

DTC Information Mode

Use the DTC info mode to search for a specific type of stored DTC information. There are two choices. Theservice manual may instruct the techinician to test forDTCs in a certain manner. Always follow publishedservice procedures.

060MY002

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Current Diagnostic Trouble Codes

This selection will display all DTCs that have failedduring the present ignition cycle.

History Diagnostic Trouble Codes

This selection will display only DTCs that are stored inthe EHCU's history memory.

Plotting Snapshot Graph

This test selects several necessary items from the datalist to plot graphs and makes data comparison on a longterm basis. This test can check ABS performance anddefect by graphing wheel speed differences betweenright and left sides, and front and rear sides obtainedfrom the ABS data list menu.

060MY007

For trouble diagnosis, you can collect graphic data(snap shot) directly from the vehicle.You can replay the snapshot data as needed. Therefore,accurate diagnosis is possible, even though the vehicleis not available.

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Plotting Graph Flow Chart (Plotting graph after obtaining vehicle information)

060RX085

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Flow Chart for Snapshot Replay (Plotting Graph)

060RX040

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Tech 2 Data DisplayUse the Tech 2 Data Values only after the ABSDiagnostic System Check has been completed, noDTC(s) were noted, and you have determined that theon-board diagnostics are functioning properly. Tech 2values from a properly-running engine may be used forcomparison with the engine you are diagnosing.

ABS Data

Ignition SW is ON position.

(For example)

060MY006

Special FunctionThere are 12 different menus available for this test. Thestate of each circuit can be tested by using thesemenus. Especially when DTC cannot be detected, afaulty circuit can be diagnosed by testing each circuit bymeans of these menus.Even when DTC has been detected, the circuit testsusing these menus could help discriminate between amechanical trouble and an electrical trouble.In all cases test condition; Engine stops with the keyturned to the ON position. To be more specific, the testis conducted with the brake pedal stepped on afterstepping once and releasing.

Engine: Stop

Ignition SW: ON

Brake Pedal: ON-OFF-ONIf the Ignition SW was turned OFF or communication

was lost, make sure to apply the brake pedal ON-OFF-ON once again and then continue the test.

060MY008

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ABS Warning Light

Test condition: Engine stops with the key turned to theON position. To be more specific, the test is conducted

with the brake pedal stepped on after stepping once andreleasing.

The circuit is normal if the warning light in the meterpanel comes on and goes out in accordance withTech2's instruction.

LNW35AMH000101

ABS Relay



Make sure of the working sound of the ABS relay.The circuit is normal if the working sound of the ABSrelay is made in accordance with Tech2's instruction.

LNW35AMH000201

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ABS Motor



Make sure of the working sound of the ABS motor.The circuit is normal if the working sound of the ABSmotor is made in accordance with Tech2's instruction.

LNW35AMH000301

Hold Valve Test

Purpose: The purpose of this test is to detect brake pipeand valve line harness wire wrong connections andvalve trouble.This test will help you confirm the result of your repair

service including the removal/reinstallation of brakepipe, valve line harness and valve.

LNW35AMH000501

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Test conditions: The ignition key is in the ON position with the four wheels lifted up. The brake pedal isstepped on, released and stepped on again with theparking brake released.Test procedure:

1. Connect Tech 2 with the vehicle, and select SpecialFunction from the menus.

2. Select a Hold Valve Menu from the Special FunctionMenus.

LNW35AMH000601

3. Press the Hold Valve ON Soft Key with the brakepedal stepped on.

4. Release the brake pedal.5. Make sure that the Hold Valve ON aimed at by

Tech 2 and the wheel locked position are the same.If different, check brake pipe, valve line harness

wiring and H/UNIT. Repair is needed if abnormalityis found.

Release Valve Test

Purpose: The purpose of this test is to detect brake pipeand valve line harness wire wrong connections andvalve trouble.This test will help you confirm the result of your repair

service including the removal/reinstallation of brakepipe, valve line harness and valve.

LNW35AMH000801

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Test conditions: The ignition key is in the ON position with the four wheels lifted up. The brake pedal isstepped on, released and stepped on again with theparking brake released.Test procedure:

1. Connect Tech 2 with the vehicle, and select SpecialFunction from the menus.

2. Select a Release Valve Menu from the SpecialFunction Menus.

LNW35AMH000701

3. Press the Release Valve ON Soft Key with thebrake pedal stepped on.

4. Make sure that the Release Valve ON aimed at byTech 2 and the wheel released position are thesame. If different, check brake pipe, valve line

harness wiring and H/UNIT. Repair is needed if abnormality is found.

5. Conduct Step 2 through Step 4 above on all the four wheels.

LNW35AMH000801

CAUTION: When conducting this test, pleaseobserve the following cautions.

a. Do not start the engine without fail.

b. Lift up the vehicle at a level floor. Secure a clearance from the floor surface

enough to allow the lifted tire to rotate.

c. Maintain the lift up.d. Wipe the floor surface to remove water and oil

so that the surface may become unslippery.e. Do not load the vehicle.

When lifting up the vehicle, be sure toobserve the lifting up points. Refer to vehiclelifting points in 0A section.

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6. Conduct Step 2 through Step 5 above on all the four wheels.

LNW35AMH000901

LNW35AMH001001

CAUTION: When conducting this test, pleaseobserve the following cautions.

a. Do not start the engine without fail.b. Lift up the vehicle at a level floor.

Secure a clearance from the floor surfaceenough to allow the lifted tire to rotate.

c. Maintain the lift up.

d. Wipe the floor surface to remove water and oilso that the surface may become unslippery.

e. Do not load the vehicle. When lifting up the vehicle, be sure to

observe the lifting up points. Refer to vehiclelifting points in 0A section.

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Diagnostic Trouble CodesChoose and trace an appropriate flowchart by thenumbers listed below to find fault and repair.

*A: Prohibition applicable wheel control*B: If sensor power supply is low then ABS is not

controlled by EHCU.*C: If tire diameter is error then ABS is not controlled by

EHCU.

DTC

(FlashCode) Description

Warning Light System Control

Main ItemsABS ABS

(12)

Normal Condition

C0271(14)

EHCU Abnormality EHCU

C0277(15)

EHCU Power Supply Low Input or High Input *B Battery, Wiring orEHCU

C0299(25)

Exhaust Brake Cut Malfunction Relay or Wiring

C0267

(33)

ABS Motor Abnormality Motor (EHCU)

C0268(34)

Abnormal ABS Motor Rotation Motor (EHCU)

C0265(41)

Fail Safe Relay (FSR) {Solenoid Valve Relay} Abnormality

EHCU

C0241(43)

Solenoid Control Circuit Malfunction EHCU

C0242(45)

Solenoid Control Monitor Error Wiring or EHCU

C0225(51)

Front Left Wheel Speed Sensor Short Circuit orCircuit Open

*A Sensor or Wiring

C0221(52)

Front Right Wheel Speed Sensor Short Circuit orCircuit Open

*A Sensor or Wiring

C0235(53)

Rear Left Wheel Speed Sensor Short Circuit orCircuit Open

*A Sensor or Wiring

C0231(54)

Rear Right Wheel Speed Sensor Short Circuit orCircuit Open

*A Sensor or Wiring

C0226(61)

Front Left Wheel Sensor Incorrect Signal or TireDiameter Error

*A, *C Sensor or Wiring

C0222(62)

Front Right Wheel Sensor Incorrect Signal orTire Diameter Error


C0236(63)

Rear Left Wheel Sensor Incorrect Signal or TireDiameter Error


C0232(64)

Rear Right Wheel Sensor Incorrect Signal or TireDiameter Error


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Diagnosis By ABS Warning LightIllumination PatternIn the event that there is abnormality in the ABS

warning light illumination pattern while the key is in the

ON position or if the warning light is actuated duringdriving, trouble should be diagnosed on a illuminationpattern basis as follows:

Diagnostic Trouble Codes (DTCs)When the warning light in the meter remains ON, theEHCU stores the fault identification and disables the

ABS.1. How to start DTC display:

Confirm that the vehicle has come to a completestop (with the wheels standing still) and that thebrake pedal is not depressed. (Unless these twoconditions are satisfied, DTC display cannot bestarted.)

With the key switch OFF, disconnect diagnosisconnector. Then turn the key switch ON.

DTCs can be displayed also by TECH 2.

No. Condition ABS" Warning Light Illumination Pattern Diagnostic

1 Warning light isactuated normally

Normal

2 Warning light is not lit Warning light lighting circuittrouble Go to Chart No ABSWarning Light".

3 Warning light isactuated while driving

Diagnostic trouble codes arestored.Display diagnostic troublecodes and diagnose on acode basis according to theflow charts.

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The DLC (for Tech 2) and Diagnosis connector are located behind the driver side lower cluster panel

LNW35ASF000101

2. DTC display: DTC is displayed by blinking warning light. Double-digit display.

First, normal DTC 12 is displayed three times andthen any other DTCs are displayed three times.(If no other DTCs have been stored, the displayof DTC 12 will be repeated.)

3. How to erase code: Conduct brake switch ON/OFF operation 6 or

more times within 3 seconds of self-diagnosisstartup.

The code cannot be erased if more than 3seconds have passed since self-diagnosisstartup, or if self-diagnosis has started with brakeswitched on (brake pedal depressed).

DTCs can be erased also by Tech 2.

B05LY001

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4. An example of DTC displayDisplay of DTC 23

B05RW006-1

After displaying DTC 12 three times, one DTC afteranother is displayed, starting with the most recentone. (However, display is discontinued after about 5minutes.)The DTC 12 is displayed repeatedly. (display isdiscontinued after about 5 minutes)

B05RS005-1

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Basic Diagnostic Flow Chart

Step Action Value(s) YES NO

1 1. Ignition ON,"engine OFF."

2. Observe the ABS warning light.

NOTE: If a starter switch is turned ON, ABS warninglight will turn on and a ABS warning light will be turnedoff after 3 seconds.

Is the ABS warning light ON"? Go to Step 2Go to No ABSwarning light"

2 1. Ignition OFF."

2. Install Tech2.

3. Ignition ON."

4. Attempt to display ABS data with the Tech 2.

Does the Tech 2 display ABS data? Go to Step 5 Go to Step 33 1. Ignition OFF," disconnect the EHCU.

2. Check the DLC (Data Link Connector) circuit foran open, short to ground, or short to voltage. Also,check the DLC ignition feed circuit for an open orshort to ground and the DLC ground circuit for anopen.

3. If a problem is found, repair as necessary.

Was a problem found? Go to Step 2 Go to Step 4

4 1. Check the EHCU circuit for an open, short toground, or short to voltage. Also, check the EHCU

ignition feed circuit for an open or short to groundand the EHCU ground circuit for an open.


Was a problem found? Go to Step 2 Go to Step 11

5 Select "Display DTCs" with the Tech 2.

Are any DTCs stored? Go to Step 6 Go to Step 10

6 Review and record for Tech 2 Failure Records dataand DTCs.

Is the action complete? Go to Step 7

7 Following the DTC is stored.Is this DTC C0214 stored?

Go to applicableDTC table after

Go to step 8 Go to Step 8

8 Clear the DTCs by "Clear the Information" with Tech 2.

Did the DTCs cleared? Go to Step 9


Are any DTCs stored? Go to applicable

DTC table Go to Step 10

10 Review and record for Tech 2 data.

Is the action complete?

Go to SymptomDiagnosis and

Go to Basic

InspectionProcedure

11 Replace the EHCU

Is the action complete? Verify repair

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Basic Inspection Procedure

1. Basic Inspection of Service Brake

2. Ground Inspection


1 Is the fluid level normal? Go to Step 2

Replenish withfluid Go to Step 2

2 Does fluid leak?

Repair Go toStep 3 Go to Step 3

3 Is the booster function normal? Go to Step 4

Repair Go toStep 4

4 Is the pad and rotor normal? Go to Step 5

Repair Go toStep 5

5 Reconnect all components. Ensure all component areproperly mounted.

Was this step finished? Verify repair


1 Does ABS related ground points normally? Go to Step 2

Repair Go toStep 2

2 Reconnect all components. Ensure all component areproperly mounted.

Was this step finished? Verify repair

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Symptom DiagnosisThe symptoms that cannot be indicated by warning lightcan be divided in the following five categories:

1. ABS works frequently but vehicle does not

decelerate.2. Uneven braking occurs while ABS works.3. The wheels are locked.

4. Brake pedal feel is abnormal.

5. Braking sound (from EHCU) is heard while notbraking.

6. No ABS Warning lightThese are all attributable to problems which cannot be

detected by EHCU self-diagnosis. Use the customercomplaint and a test to determine which symptom ispresent.

ABS Works Frequently But Vehicle Does Not Decelerate

Uneven Braking Occurs While ABS Works


1 Is braking force distribution normal between front andrear of vehicle?

Go to Step 2

Repair brakeparts. Go to Step

6

2 Are axle parts installed normally?

Go to Step 3

Repair ax leparts. Go to Step6

3 Is there play in each or any wheel speed sensor?

Repair wheelspeed sensor.Go to Step 6 Go to Step 4

4 Is there damage, or powered iron sticking to each orany wheel speed sensor/sensor rotor?

Replace WheelSpeed sensor orsensor rotor. Go

to Step 6 Go to Step 5

5 Is the each wheel speed sensor normal?

Go to Step 6

Replace wheelspeed sensor orrepair harness.

Go to Step 6

6 Reconnect all components, ensure all components areproperly mounted.

Was this step finished?

Repeat the"Basic diagnostic

flow chart" Go to Step 6


1 Is there play in each or any sensor?

Repair. Go toStep 5 Go to Step 2

2 Damage or powdered iron sticking to each or anysensor/sensor rotor?


3 Is the each sensor normal?

Go to Step 4

Replace sensoror repair

harness. Go toStep 5

4 Is brake pipe connecting order correct?

Replace EHCU.

Go to Step 5

Reconnect brakepipe correctly.Go to Step 5





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The Wheels Are Locked

Brake Pedal Feed Is Abnormal


1 Is ABS working? Go to Step 2 Go to Step 4

2 Is vehicle speed under 5 km/h? Go to Step 3 Normal.

3 Is the each sensor normal?

Go to Step 4

Replace sensoror repair


4 Is EHCU grounded properly?

Replace EHCU.Go to Step 6

Repair. Go toStep 6



Repeat theBasic diagnostic



1 Is the stop light actuated when the brake pedal isdepressed? Go to Step 2 Go to Step 3

2 1. Turn the igni tion switch off.

2. Disconnected EHCU connector.

Is the check voltage for EHCU connector terminals

when brake pedal is depressed than battery voltage? Go to Step 4

Harness NGbetween stoplight SW andEHCU. Go to

Step 63 Is stop light fuse normal?

Go to Step 5

Replace stoplight fuse. Go to

Step 6

4 Is the check continuity between EHCU connector tobody grounded?

Go to Step 6

Repair bodygrounded


5 Is stop light switch normal?

Repair stop lightharness. Go to

Step 6

Replace stoplight switch. Go

to Step 6





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Braking Sound (From EHCU) Is Heard While Not Braking


1 Is this the first vehicle start after engine start?

It is self checkingsound Normal. Go to Step 2

2 Is vehicle speed under 10 km/h?

It is self checkingsound Normal. Go to Step 3

3 Check for the following condition:1. At the time of shift down or clutch operation.

2. At the time of low road friction drive (ice or snow road) or rough road drive.

3. At the time of high-speed turn.

4. At the time of passing curb.5. At the time of operating electrical equipment

switches.6. At the time of racing the engine.

Did it occur under any one condition above?

ABS maySometimes be

actuated even when brakepedal is not

applied. Go to Step 4

4 Is there play in each or any sensor/wheel speedsensor rotor?


5 Damage or powdered iron sticking to each or anysensor/wheel speed sensor rotor?


6 Is each sensor normal?

Check harness /connector for

suspecteddisconnectionIf

no disconnectionis found, replace

EHCU Go toStep 7 Go to Step 7



Repeat theBasic diagnostic


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No ABS Warning Light


1 Check the meter fuse for the instrument clusterignition feed circuit.

Is the fuse OK? Go to Step 3 Go to Step 2

2 Replace the fuse.

Is the action complete? Verify repair Go

to Step 3

3 1. Ignition OFF," disconnect the EHCU.2. Ignition ON," engine OFF."

3. Observe the ABS warning light.

Is the ABS warning light ON"? Go to Step 5 Go to Step 4

4 Repair or replace the meter circuit or meter.


5 1. Check the EHCU circuit for an open, short toground, or short to voltage. Also, check the EHCUignition feed circuit for an open or short to groundand the EHCU ground circuit for an open.


Was a problem found? Verify repair Go to Step 6

6 1. Ignition OFF," reconnect the EHCU.2. Ignition ON," engine OFF."

3. Observe the ABS warning light.Is the ABS warning light ON"? Verify repair Go to Step 7

7 Replace EHCU.


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Rear Wheel Speed Sensor InspectionProcedureProcedure

1. Ignition OFF".

2. Disconnect the each wheel speed sensors.3. Check the voltage at sensor harness connector.

NOTE: Voltage measurement is performed in thephase where the wheel speed sensor is installed invehicles.

LNW35ASF000301

EndOFCallout

Connector Pin-outs Rear Wheel Speed Sensor

Legend(1) Battery(2) High Impedance Multimeter (J-39200)

(3) Resister (120 )(4) Rear Wheel Speed Sensor

1 (+) (+12V)

2 ( ) (signal)

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DTC C0271 (Flash Code 14) EHCU Abnormality


1 Was the Basic Diagnostic Flow Chart" performed?

Go to Step 2

Go to BasicDiagnostic Flow

Chart

2 1. Ignition OFF".2. Check the EHCU circuit for an open, short to

ground, or short to voltage. Also, check the EHCUignition feed circuit for an open or short to groundand the EHCU ground circuit for an open or shortto voltage.



3 1. Ignition ON," engine OFF."2. Select Display DTCs" with the Tech 2. Note:

Perform the various tests (actuator test, test run,brake test, etc.) then observe the DTC with aTech2.

Are any DTCs stored? Go to Step 4 Verify repair

4 Replace EHCU.

Was the action complete? Verify repair

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DTC C0299 (Flash Code 25) Exhaust Brake Cut Malfunction

DTC C0267 (Flash Code 33) ABS Motor Abnormality



Go to Step 2


Chart

2 1. Check for a poor connection at EHCU2. If a problem is found, repair as necessary.


3 1. Check the exhaust brake (IN, OUT) circuit. (Circuitfor an open, short to ground, or short to voltage.)



4 1. Ignition ON," engine OFF."2. Select Display DTCs" with the Tech 2.


5 Replace EHCU.




Go to Step 2


Chart





3 1. Ignition ON," engine OFF."

2. Select Display DTCs" with the Tech 2. Note:Perform the various tests (actuator test, test run,brake test, etc.) then observe the DTC with aTech2.


4 Replace EHCU.


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DTC C0268 (Flash Code 34) Abnormal ABS motor Rotation

DTC C0265 (Flash Code 41) Fail Safe Relay (FSR) {Solenoid Valve Relay} Abnormality


1 Was the "Basic Diagnostic Flow Chart" performed?

Go to Step 2


Chart








4 Replace EHCU.




Go to Step 2


Chart

2 1. Ignition OFF".

2. Check the EHCU circuit for an open, short toground, or short to voltage. Also, check the EHCUignition feed circuit for an open or short to groundand the EHCU ground circuit for an open or shortto voltage.



3 1. Ignition ON," engine OFF."2. Select "Display DTCs" with the Tech 2.Note:



4 Replace EHCU.


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DTC C0241 (Flash Code 43) Solenoid Control Circuit Malfunction

DTC C0242 (Flash Code 45) Solenoid Control Monitor Error



Go to Step 2


Chart





3 1. Ignition ON," engine OFF."2. Select "Display DTCs" with the Tech 2.Note:



4 Replace EHCU.




Go to Step 2


Chart

2 1. Ignition OFF".

2. Check the EHCU circuit for an open, short toground, or short to voltage. Also, check the EHCUignition feed circuit for an open or short to groundand the EHCU ground circuit for an open or shortto voltage.






4 Replace EHCU.


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DTC C0225 (Flash Code 51) Front Left Wheel Speed Sensor Short Circuit or Circuit



Go to Step 2


Chart

2 1. Check for a poor connection at the front left wheelspeed sensor harness connector.

2. Check installation condition for front left wheelspeed sensor.



3 1. Ignition OFF," disconnect the EHCU and front left wheel speed sensor.

2. Check the circuit between EHCU and front left wheel speed sensor. (Circuit for an open, short toground, or short to voltage.)



4 Measure the resistance at front left wheel speedsensor.

Was the value normal? 1 2 k Go to Step 6 Go to Step 5

5 1. Replace front left wheel speed sensor.

2. Select Display DTCs" with the Tech 2. Note :



6 1. Check the DTC stored.

2. Select Display DTCs" with the Tech 2.


7 Replace EHCU.


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DTC C0221 (Flash Code 52) Front Right Wheel Speed Sensor Short Circuit or Circuit Open



Go to Step 2


Chart

2 1. Check for a poor connection at the front right wheel speed sensor harness connector.

2. Check installation condition for front right wheelspeed sensor.



3 1. Ignition OFF," disconnect the EHCU and frontright wheel speed sensor.

2. Check the circuit between EHCU and front right wheel speed sensor. (Circuit for an open, short toground, or short to voltage.)



4 Measure the resistance at front right wheel speedsensor.

Was the value normal? 1 2 k Go to Step 6 Go to Step 5

5 1. Replace front right wheel speed sensor.

2. Select "Display DTCs" with the Tech 2. Note :



6 1. Check the DTC stored.



7 Replace EHCU.


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DTC C0235 (Flash Code 53) Rear Left Wheel Speed Sensor Short Circuit or Circuit Open



Go to Step 2


Chart

2 1. Check for a poor connection at the rear left wheelspeed sensor harness connector.

2. Check installation condition for rear left wheelspeed sensor.



3 1. Ignition OFF," disconnect the EHCU and rear left wheel speed sensor.

2. Check the circuit between EHCU and rear left wheel speed sensor. (Circuit for an open, short toground, or short to voltage.)



4 Check the rear left wheel sensor power supplyvoltage.

1. Reconnect the EHCU.

2. Ignition ON".3. Measure the voltage between rear left wheel

speed sensor connector and GND.

Was the value normal? 12V Go to Step 5 Go to Step 6

5 1. Replace rear left wheel speed sensor.

2. Select Display DTCs" with the Tech 2. Note :Perform the various tests (actuator test, test run,brake test, etc.) then observe the DTC with aTech2.


6 Replace EHCU.


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DTC C0226 (Flash Code 61) Front Left Wheel Sensor Incorrect Signal or Tire Diameter Error



Go to Step 2


Chart

2 1. Check the condit ion for below the items. Size of a tire The amount of wear of a tire



3 1. Check for a poor connection at the front left wheelspeed sensor harness connector.

2. Check installation condition for front left wheelspeed sensor.



4 Measure the resistance at front left wheel speedsensor.

Was the resistance specified value? 1 2k Go to Step 6 Go to Step 5

5 1. Replace front left wheel speed sensor.



6 1. Check installation condition for front left wheel hubbearing.



7 1. Check installation condition for sensor rotor.2. If a problem is found, repair as necessary.




9 Replace EHCU.


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DTC C0222 (Flash Code 62) Front Right Wheel Sensor Incorrect Signal or Tire DiameterError


1 Was the "Basic Diagnostic Flow Chart"performed?

Go to Step 2


Chart

2 1. Check the condit ion for below the items.

Size of a tire

The amount of wear of a tire2. If a problem is found, repair as necessary.


3 1. Check for a poor connection at the front right wheel speed sensor harness connector.

2. Check installation condition for front right wheelspeed sensor.



4 Measure the resistance at front right wheel speedsensor.

Was the resistance specified value? 1 2k Go to Step 6 Go to Step 5

5 1. Replace front Right wheel speed sensor.

2. Select "Display DTCs" with the Tech 2.

Are any DTCs stored? Go to Step 6 Verify repair6 1. Check installation condition for front right wheel

hub bearing.



7 1. Check installation condition for sensor rotor.




Are any DTCs stored? Go to Step 9 Verify repair9 Replace EHCU.


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DTC C0236 (Flash Code 63) Rear Left Wheel Sensor Incorrect Signal or Tire Diameter Error



Go to Step 2


Chart

2 1. Check the condit ion for below the items. Size of a tire The amount of wear of a tire



3 1. Check for a poor connection at the rear left wheelspeed sensor harness connector.

2. Check installation condition for rear left wheelspeed sensor.



4 Check the rear left wheel speed sensor supplyvoltage.

1. Reconnect the EHCU.2. Ignition "ON"

3. Measure the voltage between rear left wheelspeed sensor (harness side) and GND.

Was the voltage near the specified value? 12V Go to Step 5 Go to Step 6

5 1. Replace rear left wheel speed sensor.



6 1. Replace EHCU.



7 1. Check installation condition for rear left wheel hubbearing.



8 1. Check installation condition for sensor rotor.2. If a problem is found, repair as necessary.



Are any DTCs stored? Go to Step 10 Veri fy repai r

10 Replace EHCU.


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DTC C0232 (Flash Code 64) Rear Right Wheel Sensor Incorrect Signal or Tire DiameterError



Go to Step 2


Chart

2 1. Check the condit ion for below the items.

2. Size of a tire

3. The amount of wear of a tire4. If a problem is found, repair as necessary.


3 1. Check for a poor connection at the rear right wheelspeed sensor harness connector.

2. Check installation condition for rear right wheelspeed sensor.



4 Check the rear right wheel speed sensor supplyvoltage.

1. Reconnect the EHCU.2. Ignition "ON"

3. Measure the voltage between rear right wheelspeed sensor (harness side) and GND.

Was the voltage near the specified value? 12V Go to Step 5 Go to Step 6

5 1. Replace rear right wheel speed sensor.2. Select "Display DTCs" with the Tech 2.


6 1. Replace EHCU.



7 1. Check installation condition for rear right wheelhub bearing.



8 1. Check installation condition for sensor rotor.




Are any DTCs stored? Go to Step 10 Veri fy repai r

10 Replace EHCU.


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Electronic Hydraulic Control Unit (EHCU)

EHCU and Associated Parts

350L300003

EndOFCallout

NOTE: If welding work is to be performed on the vehicle

using an electric arc welder, the EHCU should beremoved from the vehicle befor the weldingoperation begins.

Do not put radio equipment etc, that emits strongradio wave near the EHCU.

Never loosen any screw on the control unit. Do not paint the control unit.

Prevrnt possible electrostatic discharge damage. Do not touch the control unit pin type terminal with a

metalic tip of a screwdriver or tester.

Do not apply voltage to the terminal.

Legend(1) Pipe(2) EHCU(3) Connector

(4) Bracket(5) Nut(6) Cover(7) Front

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Removal1. Disconnect battery ground cable.2. Remove the cover (6).

3. Disconnect the harness connector (3).

4. Disconnect 6 (six) brake pipes (1). After disconnecting brake pipe, cap or tape the

openings of the brake pipe to prevent the entryof foreign matter.

5. Remove EHCU fixing nuts (5).

6. Remove the EHCU (2).7. Remove the bracket (4).

InstallationTo install, follow the removal steps in the reverse order,

noting the following points:Torque

Hydraulic unit fixing nuts (5) : 20 N m (15 lbft)

Brake pipe flare nuts (1) : 16 N m (12 lbft)

After installing the EHCU, bleed brakes completely.See Section 5A Hydraulic Brakes .When bleeding, disconnect the fuse (60A) for ABShydraulic unit.

LNW24CSH000601

EndOFCallout

Legend(1) Master Cylinder (front)(2) Master Cylinder (rear)(3) Rear Right Wheel Cylinder(4) Rear Left Wheel Cylinder(5) Front Right Wheel Cylinder(6) Front Left Wheel Cylinder

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Front Speed Sensor

Front Speed Sensor and Associated Parts

350LY007

EndOFCallout

Removal1. Remove speed sensor connector.2. Remove sensor cable fixing bolts.3. Remove the speed sensor fixing bolt.

4. Remove speed sensor.

Inspection and Repair 1. Check the speed sensor pole piece for presence of

foreign materials; remove any dirt, etc.

2. Check the pole piece for damage; replace speedsensor if necessary.

Legend(1) Speed Sensor Connector(2) Sensor Cable Fixing Bolt(3) Sensor Cable Fixing Bolt

(4) Sensor Fixing Bolt(5) Speed Sensor(6) Front

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3. Check the speed sensor cable for short or opencircuit, and replace with a new one if necessary.To check for cable short or open, bend or stretch thecable while checking for continuity.

350LY007

Installation1. Install speed sensor and take care not to hit the

speed sensor pole piece during installation.

2. Install speed sensor fixing bolt and tighten the fixingbolt to the specified torque.

Torque : 22 N m (16 lbft)

3. Install speed sensor cable fixing bolts and tightenthe fixing bolt to the specified torque.

Torque

Bolts (2) : 22 N m (16 lbft)

Bolt (3) : 45 N m (33 lbft)

NOTE: Confirm that a white or yellow line marked onthe cable is not twisted when connecting the speedsensor cable.

4. Connect speed sensor connector.

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Front Speed Sensor Rotor

Front Speed Sensor Rotor and Associated Parts

302LY003

EndOFCallout

Removal1. Remove disc brake assembly and support the

caliper assembly so that the brake hose is notstretched or damaged.

2. Remove hub cap.

3. Remove cotter pin and hub nut.4. Remove washer.

Legend(1) Disc Brake Assembly(2) Hub Cap(3) Cotter Pin(4) Hub Nut(5) Washer

(6) Hub and Disc Assembly(7) Speed Sensor Rotor(8) Inner Bearing(9) Oil Seal

(10) Spacer

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5. Remove hub and disc assembly.

302LY001

6. Remove speed sensor rotor.

7. Remove inner bearing, oil seal and spacer.

Inspection and Repair 1. Check the speed sensor rotor for damage including

tooth chipping, and if damaged, replace the speedsensor rotor.

Installation1. Using a bench press, install speed sensor rotor.

2. Install spacer onto the knuckle spindle.

3. Apply grease into the outer and inner bearings andinstall bearings in the hub.

4. Install oil seal into hub and disc assembly and installhub and disc assembly on to the knuckle spindle.

Preload Adjustment Adjust the wheel bearing as follows:

1. Tighten the nut until you are unable to manuallyrotate the hub and disc assembly.

2. Loosen the nut.3. Attach a spring balancer to one stud. Gradually

retighten the nut until the hub and disc assemblybearing is adjusted to the specified preload.

Hub bearing preloadNew Hub Bearing 9.8-24.5 N (2.2-5.5 lb)Reused Hub Bearing 4.9-19.6 N (1.1-4.4 lb)

302LY002

5. Install a cotter pin through the nut and knuckle andbend it over.

If the notch in the nut does not line up with thecotter pin hole in the knuckle, tighten the nutuntil it does. Do not loosen the nut to line up anotch and the knuckle hole.

6. Apply grease into the hub cap and install it.

40g7. Install the disc brake assembly and tighten two bolts

to the specified torque.

Torque : 221 N m (163 lb ft)

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Rear Speed Sensor

Rear Speed Sensor and Associated Parts

420LY002

EndOFCallout

Legend(1) Brake Drum(2) Speed Sensor Fixing Bolt

(3) Speed Sensor(4) Speed Sensor Bracket

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Rear Speed Sensor Rotor

Rear Speed Sensor Rotor and Associated Parts

420LY001

EndOFCallout

Removal1. Remove brake drum.

2. Remove axle shaft.

3. Remove outer oil seal, using a screwdriver.4. Remove lock washer.5. Remove bearing nut with a hub bearing nut wrench.

6. Remove hub assembly from axle case.

7. Remove outer bearing from hub assembly.

8. Remove speed sensor rotor from hub assembly.9. Remove inner bearing and inner oil seal from axle

case

Inspection and Repair 1. Check the speed sensor rotor for damage including

tooth chipping. If damaged, replace speed sensorrotor.

Installation1. Using a bench press, install speed sensor rotor.

NOTE: Do not reuse the sensor rotor.

2. Install spacer on to the axle case.

3. Apply grease into the outer and inner bearings andinstall bearings in the hub.

4. Install outer oil seal into hub.

Legend(1) Brake Drum(2) Axle Shaft(3) Outer Oil Seal(4) Lock Washer(5) Bearing Nut

(6) Outer Bearing(7) Rear Hub(8) Speed Sensor Rotor(9) Inner Bearing

(10) Inner Oil Seal

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5. Install hub assembly onto the axle case.

420LY003

6. Set the lock nut with the notched line facing out.Preload Adjustment

1. Turn the hub to the left and right several times toestablish bearing conformity.

2. Use the bearing nut wrench to tighten thebearing nut until the hub can not be manuallyrotated.

3. Loosen the bearing nut until hub rotates easily.

420LY004

4. Set the spring balancer to the wheel pin in theposition shown in the illustration.

5. Measure the hub bearing preload by carefullypulling on the spring balancer and noting theindicator reading.Hub Bearing Preload (At Wheel Pin)42-52 N (9.5-11.7 lb)

6. Rotate the hub several times to the right andleft.

7. Measure the bearing preload a second time.

420LY005

8. Align the axle case groove with the closestbearing nut slit.

NOTE: If it is difficult to align the axle case and bearingnut, slightly tighten the bearing nut.

7. Install the lock washer with the lock washer tabsinserted to the axle case grooves.Install the lock bolts to prevent the bearing nut fromloosening.Check that the lock washer tabs are inserted to theaxle case grooves.

8. Apply grease to the outer oil seal lip inner and outercircumferences and install outer oil seal.

9. Clean the axle shaft. Apply gear oil to the ax le shaft spline.Insert the axle shaft into the axle case.Take care not to damage the oil seal.

10. Tighten the axle shaft nuts to the specified torque alittle at a time.Torque : 46 N m (34 lb ft)

11. Install brake drum.

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Documents

03NPR(GAS)5A4.pdf