defecte multiplexare

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Electrical equipment

77 11 322 302

"The repair procedures given by the manufacturer in this document are based on the

technical specifications current when it was prepared.

The procedures may be modified as a result of changes introduced by themanufacturer in the production of the various component units and accessories fromwhich his vehicles are constructed."

MARCH 2006

All rights reserved by Renault s.a.s.

EDITION ANGLAISE

Copying or translating, in part or in full, of this document or use of the service part

reference numbering system is forbidden without the prior written authority ofRenault s.a.s.

Renault s.a.s. 2006

MULTIPLEXING

Fault finding - Introduction 88B - 1

Fault finding - List and location of components 88B - 5

Fault finding - Operating diagram 88B - 6

Fault finding - Features 88B - 7

Fault finding - Defect and safe modes 88B - 9

Fault finding - Configuration 88B - 10

Fault finding - Interpretation of faults 88B - 12

Fault finding - Customer complaints 88B - 17

Fault finding - Fault Finding Chart 88B - 18

88B


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MULTIPLEXING

Fault finding - Introduction 88B

88B-1

188BMULTIPLEXING

Fault finding - Introduction

INTRODUCTION

Description of the multiplex network:

The multiplex network consists of a twisted pair of wires connected to several vehicle computers. These two wires

are known as multiplex line H and multiplex line L.

Two of the computers have an internal resistance of 120 (terminating resistance):

the airbag computer,

the injection computer.

The network carries data exchanged by the computers.

The Scnic II ph2 is a new generation multiplex vehicle; the main change is the increase in communication speed

to 500 kBauds.

On the Scnic II ph2, fault finding can only be performed on one multiplex network with the RENAULT tool.

The maximum number of computers on this network is 15.

PURPOSE

q The purpose of the multiplex network test is to determine the various computers present on the vehicle's

multiplex network and to determine the cause of possible inter-computer communication faults.

q It also serves to determine the functions installed in the vehicle, which are sometimes housed in various

computers (distributed functions).

q The test also checks the condition of multiplex network segments.

q The multiplex network test can also run fault finding on computers disconnected from the multiplex network;

this provides an overview of the vehicle's electronic layout.

IMPORTANT

Fault finding can only be carried out on Scnic II ph2 using the CLIP diagnostic tool equipped with the new

vehicle connection probe cord (Part no.: El 1674 or00 00 167 400).

Note:

A second multiplex network for the navigation system may also be present.


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MULTIPLEXING


88B-2

MONITORING MULTIPLEX NETWORK OPERATION

This step is the essential starting point for any computer fault finding procedure.

It ensures that the network is correctly connected at the terminals of each computer and that the signal is correctly

sent to it and received by it. On the Scnic II ph2, this function also reads the number of faults present on the

computers.

The multiplex network test function is executed automatically after vehicle selection by the user.

After the network check, the other functions become accessible.

MULTIPLEX NETWORK TEST PROCEDURE

Establish dialogue with the computers storing the vehicle configuration (read identification).

Vehicle configuration read on the two computers that hold the multiplex network configuration (airbag and UCH

on the SCENIC II ph2).

List of computers that can support fault finding read from the two computers that hold the multiplex network

configuration.

Computer interrogation.

Physical (electronic) measurements on the multiplex line network.

Vehicle computer power supply for fault finding:

insert the vehicle card in the card reader.

Press and hold (over5 seconds) the Start button in the absence of start conditions (for example: selecting a gear).

Connect the diagnostic tool and perform the required operations.

IMPORTANT

To supply the discharge bulb computer, switch on the dipped headlights.


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MULTIPLEXING


88B-3

COMPUTERS

Valid: green outline, green writing.

Not detected: red outline, red writing.

Does not support fault finding: black outline, black writing. Not recognised: red outline, red writing + exclamation mark.

SEGMENTS

Valid: green line.

Faulty: red line.

No fault finding: black line.

INTERPRETING TEST RESULT CHARTS

On the Problems tab, the computers are organised into the following groups:

Not detected if the computer failed to respond to the tool's identification request. Within the not detected category, the computers are subdivided into Stores multiplex network configuration

and Does not store multiplex network configuration.

Not recognised if the computer is detected but cannot be identified from its response.

On the Information tab, the computers are organised and listed as follows:

Cannot support fault finding, if the computer cannot support fault finding with the tool and therefore was not

queried.

Valid if the computer responded correctly to the tool's request.

If the Proceed icon in the bottom right-hand corner is selected, a new screen will appear with the following tab:

Under the Results tab the computers are organised into the following groups:

Faulty if the computer is recognised and has a non-zero number of faults. OK if the computer was detected, recognised and has no faults.

Not recognised if the computer was detected but could not be identified from its response.

Not detected if the computer can support fault finding but failed to respond.

FUNCTION TESTING

The vehicle function tests screen resembles the multiplex network test screen in showing a diagram of the network

architecture if this is known and displayed.

The Function tab displays the various computers involved in the functions whether distributed or not distributed over

the various computers.

The Info tab displays the other possible functions found on the vehicle concerned.

Selecting a function from the list greys out the computers on the diagram that are not involved in that function.

The Fault finding button runs fault finding on the function selected from the list.


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MULTIPLEXING


88B-4

REPAIR HELP:

q Assistance with computer or faulty segment detection:

If the multiplex network is completely frozen, this command can isolate multiplex network segments and therebyrule out those that respond correctly to the tool. This makes it easier to pinpoint the cause of the fault.

The algorithm for help with locating faults is intended for dealing with electrical faults present solely on the multiplex

line; it is therefore essential that connectors and computers not attached to the bus are not taken into consideration.

q A test for multiplex network faults by using physical measurements:

When a multiplex network segment has a short circuit, the computers can no longer communicate with each other or

using the diagnostic tool. At this point, the network test is not operational.

The CLIP tool can identify several types of faults by taking electrical measurements on the multiplex line H and

multiplex line L multiplex network. It can detect a multiplex line L / multiplex line H short circuit, a multiplex lineL / + 12 V short circuit, a multiplex line H / + 12 V short circuit, and a multiplex line H / earth short circuit.

Then, by disconnecting the connectors and computers in the order described under the "Help with detecting faulty

segments - computers" heading, identify the actual or possible segment causing the multiplex network fault.


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MULTIPLEXING

Fault finding - List and location of components 88B

88B-5

Fault finding - List and location of components

Multiplexing enables signals to be sent between different computers on the vehicle, such as:

1 UPC.

2 Injection computer.

3 BVA computer.

4 LPG or CNG computer.

5 ABS/ESP computer.

6 UCH.

7 Electric steering column lock.

8 Automatic parking brake computer.

9 Parking distance control computer (depending on version).

10 Electric power-assisted steering system.

11 Instrument panel.

12 Diagnostic socket.

13 ITS (depending on version).

14 Climate control computer.

15 Driving school unit (depending on vehicle).

16 Airbag/pretensioner computer.


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MULTIPLEXING

Fault finding - Operating diagram 88B

88B-6

Fault finding - Operating diagram

1 UPC.

2 Injection computer.3 BVA computer.

4 LPG or CNG computer.

5 ABS/ESP computer.

6 UCH.

7 Electric steering column lock.

8 Automatic parking brake computer.

9 Parking distance control computer (depending on

version).

10 Electric power-assisted steering system.

11 Instrument panel.

12 Diagnostic socket.

13 ITS (depending on version).14 Climate control computer.

15 Driving school unit (depending on vehicle).

16 Airbag/pretensioner computer.


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MULTIPLEXING

Fault finding - Features 88B

88B-7

Fault finding - Features

To improve the performances of vehicles, more

computers are needed to share more information in

order to achieve optimal operation.

With multiplexing, numerous signals can be sent fromone computer to several others via a single electrical

connection.

Solution without multiplexing

Example: each computer would have to have its own

electrical connection to deal with vehicle speed signals

coming from the ABS. The number of connections

increases when there are more signals to be

communicated.

Solution with multiplexing

In this instance, the vehicle speed signal is distributed

from the ABS computer to as many computers as

require it on a single electrical connection. All other

signals are transmitted via this connection as well.

Thus there is only one connection regardless of the

number of signals to be exchanged.

Advantages of multiplexing

q Reduction in costs as there is a reduction in

wire length and there are fewer connectors.

q Less wiring,

q Increased reliability due to there being fewer

connectors.

q Easier to locate a faulty component in some

cases.

Multiplex operation

The operation of a multiplex network can be compared

to an underground line which transports a number of

passengers. All the passengers use the same line

even though they get on and off at different points and

they take different trains depending on when they

started their journeys.

The multiplex network operates in a very similar way.


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MULTIPLEXING

Fault finding - Features 88B

88B-8

1) The transmitting computer formats the signal to be

transmitted into a frame that can be identified by

other computers.

2) The transmitting computer waits for the network tobe free, i.e. no frames are being transmitted by

another computer.

3) The computer can then transmit its frame.

4) All the other computers receive the transmitted

frame. As the frame has already been formatted

by the transmitting computer, the receiving

computer can determine whether the frame was

meant for it or not.

5) The receiving computers acknowledge the frameto confirm that the frame has been received. The

transmitting computer will resend the frame if it

does not receive this acknowledgement.

Transmitting frames

The frames are transmitted on two twisted wires in

order to avoid electromagnetic interference. These

wires are called multiplex line H and multiplex line L.

To reduce electrical interference when frames are sent,

the two wires have differential voltages. In addition,

terminating resistances of 120 are fitted at the endsof the network (in the airbag and injection computers)

to attenuate electrical signal reflections.

The electric signals are digital which means that there

can only be two levels of differential voltage known as

recessive status (corresponding to logic 1) and

dominant status (corresponding to logic 0).

The status is recessive when the potential difference

between multiplex line H and multiplex line L is zero

(multiplex line H = multiplex line L = 2.5 V). The status

is dominant when the potential difference betweenmultiplex line H and multiplex line L is equal to

approximately 2 V (multiplex line H = 3.5 V and

multiplex line L = 1.5 V).

Content of the frame

A multiplex line frame comprises several groups of

contiguous bits:

1 A field indicating the start of the frame.

2 An arbitration field with a destination code so thatreceiving computers can recognise the frame. In

addition, this field decides on frame priority when

several computer want to send a frame at the

same time.

3 A test field which supplies various information

about a frame.

4 A field containing the data to be transmitted.

5 A frame confirmation field which ensures that the

signal is correctly transmitted as well as the

acknowledgement indicating that the frame has

been correctly received.

6 A field indicating the end of the frame.

Fault finding

Multiplex computers fitted with diagnostic connections

have multiplex network fault finding systems.

Each computer monitors its capacity to send and

receive frames to and from other computers. Any

observed fault is revealed by one or several present or

stored faults on the multiplex network. These faults are

grouped under a format common to all computers and

are communicated via a special frame to the

diagnostic tool.

In the After-Sales Centre, these faults can be viewed

on a diagnostic tool in order to identify the faulty

connections(s) between computers and to deduce the

fault type and its location.

The diagnostic tool always runs a multiplex network

test when it is connected to the vehicle.


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MULTIPLEXING

Fault finding - Defect and safe modes 88B

88B-9

Fault finding - Defect and safe modes

The multiplexing function does not have a safe mode

program.

However, the multiplexing function may have special

operation features.

The multiplex network still functions when multiplex

line L is in short circuit to earth. The voltage on

multiplex line H is no longer differential; it corresponds

to earth.


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MULTIPLEXING

Fault finding - Configuration 88B

88B-10

Fault finding - Configuration

MULTIPLEX NETWORK CONFIGURATION

The tool displays the UCH and Airbag configurations.

The Configuration screen consists of two tabs for displaying and modifying:

The first tab: Multiplex network configuration on the multiplex network version and the list of computers defined

as present on the multiplex network.

The second tab Configuration of computers supporting fault finding indicates the relevant diagram number,

and the list of computers defined as able to support fault finding with the CLIP tool.

NOTES

The configuration is entered with the ignition on; apply the forced + after ignition

feed procedure (see Introduction).It can be run from the multiplex network test results screens.

WARNING

Enter the correct diagram version number,

Scnic II ph1: version 1.

Scnic II ph2: version 2 with ITS (Vdiag 04) or LPN navigation computer.

Scnic II ph2: version 3 with 4R or other navigation computer (Vdiag 24) or without navigation computer.

First repair the computers containing the multiplex network configuration (airbag and UCH) to be able to

display the screen with the multiplex network configuration diagram for the diagnosed vehicle.

IMPORTANTA computer connected to the multiplex network but not declared as being among the computers containing the

multiplex network configuration will not be checked in the multiplex network test.

Correct the configuration by declaring the computer as present if it is absent in the Airbag and UCH computer.

Carry out the multiplex network test again after modifying the configurations.


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MULTIPLEXING

Fault finding - Configuration 88B

88B-11

Configuration screen

Make sure that the information displayed on the tabs is correct.

The same configuration information for the two computers is essential for displaying the network topology.

Option: depending on equipment level

If during the multiplex network test the following message appears: No dialogue established with some computers:

check power supply and diagnostic lines before starting the test again.

This does not prevent the multiplex network from being viewed.

Check if too many computers have not been listed in the configuration: update the multiplex network according to

the table above.

Computer Multiplex network configurationConfiguration of computers

which can support fault finding

Injection PRESENT YES

ABS or ABS/ESP PRESENT YES

UCH PRESENT YES

Automatic gearbox PRESENT or ABSENT (option) YES or NO (option)

Instrument panel PRESENT YES

LPG PRESENT or ABSENT (option) YES or NO (option)

Steering lock PRESENT NO

Electric power-assisted steering PRESENT YES

Protection and Switching Unit PRESENT YES

Climate control (regulated) PRESENT or ABSENT (option) YES or NO (option)

Central Communication Unit* PRESENT or ABSENT (option) YES or NO (option)

Driving school unit PRESENT or ABSENT (option) NO (cannot support fault finding)

Airbag PRESENT YES

Automatic parking brake PRESENT or ABSENT (option) YES or NO (option)

Parking Distance Control** PRESENT or ABSENT (option) YES or NO (option)

Xenon bulbs ABSENT YES or NO (option)

*IMPORTANT:

NAV 4R ABSENT YES

ITS/LPN PRESENT YES

Others ABSENT NO

**Note:

The parking distance control is present on the multiplex network when it is fitted to the front and rear of the vehicle

(Vdiag OC only).

It is not present on the multiplex network if it is only fitted to the rear of the vehicle.


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MULTIPLEXING

Fault finding - Interpretation of faults 88B

88B-12

Fault finding - Interpretation of faults

FAULTY SEGMENT ON THE MULTIPLEX NETWORK

NOTES

First check that the computer at the end of the faulty segment is properly

powered (earth, + battery, + accessories or + after ignition).Always check the computer conformity.

IMPORTANT

The tool may not be able to pinpoint the faulty segment(s) exactly. It then suggests

several segments that could be faulty. In this event, repair the segment closest to the

diagnostic socket.

Isolate the faulty segment by disconnecting both ends of the segment. Check the condition of the connections (See

Technical Note 6015A Repairing electrical wiring, multiplex: Multiplex network, Repair).

Check the continuity and insulation of the multiplex line H and multiplex line L lines between the two connectors

on the isolated segment.

Refer to the vehicle's multiplex network diagrams for the allocation of tracks on the computers and connections.Perform the necessary operations to check the continuity of the two lines (for example, replacing the wiring).

Make sure that the computer present in the vehicle is compatible with the Scnic II ph2 and that the signals it is

producing are correct.

Reconnect the segment.

Run the multiplex network test again using the diagnostic tool.

Is the segment still declared faulty?

No End of fault finding.

Are there other faulty segments?Yes

No Test the multiplex network again to check the continuity and

insulation of the multiplex line H and multiplex line L lines

between the end of the faulty segment and the diagnostic

socket at connections 133B and 133C (See diagnostic

socket diagram).

Apply the same procedure to each segment.Yes

AFTER REPAIRRun the multiplex network test again using the diagnostic tool.Clear the stored faults on all the computers connected to the network.

Deal with any other faults.


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MULTIPLEXING


88B-13

FAULTY COMPUTER

NOTES

Make sure the computers installed in the vehicle are the correct type and are

compatible with the Scnic II ph2. Check the power supply of the computers (earth, + battery, + accessories or + after

ignition).

Make sure that the computerwake-up mode is in full working order on the vehicle and properly assimilated by the

computers.

The wake-up mode is:

timed supply UCH, Instrument Panel.

+ accessories feed: Protection and Switching Unit, Heating and Air Conditioning System, Central

Communication Unit.

+ After ignition feed injection, ABS/ESP, airbag, Electric Power-Assisted Steering, Automatic

Transmission, LPG/CNG, Steering Column Lock, Driving School Unit, Automatic Parking Brake, ParkingDistance Control.

+ After ignition feed + dipped headlights: Discharge bulbs.

IMPORTANT

Only establish dialogue with the discharge bulbs with + after ignition and the dipped headlights on.

Switch to computer diagnostics mode.

Attempt to establish dialogue with computers.

q No dialogue from computers to diagnostic tool: see ALP 1

No dialogue with the computeror computers not communicating with the diagnostic tool.

Check the connections to the computers and that there are no open circuits.

If there is a repair procedure (see Technical Note 6015A, Repairing electrical wiring, wiring:

precautions for repairs), repair the connectors, otherwise change them.

q The computers only produce partial information when identified:

Check in the MR or World Vehicle Database to see that the computer really is compatible with the

Scnic II ph2.

Make sure the CLIP diagnostic tool update is recent enough to handle Scnic II ph2 faults.

If after these tests no faults or open or short circuits have been detected, contact your Techline.




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MULTIPLEXING


88B-14

UNRECOGNISED COMPUTERS ON THE NETWORK

NOTES Check the compatibility of the computers with the Scnic II ph2.

Make sure the CLIP diagnostic tool update is recent enough to handle Scnic II ph2 faults.

Switch to computer diagnostics mode.

Attempt to establish dialogue with computers.

q No dialogue from computers to diagnostic tool: see ALP 1

No dialogue with the computeror computers not communicating with the diagnostic tool.

Check the connections to the computers and that there are no open circuits.

If there is a repair procedure (see Technical Note 6015A, Repairing electrical wiring, wiring:precautions for repairs), repair the connectors, otherwise change them.

q Make sure that the computer identification information is correct and matches the vehicle in fault finding.

Computer information:

Vdiag:

Program No.:

If no faults or open or short circuits have been detected after these checks, contact Techline.




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MULTIPLEXING


88B-15

MULTIPLEX NETWORK NOT OPERATIONAL

NOTES

First check that the computer at the end of the faulty segment is properly

powered (earth, + battery, + accessories or + after ignition).Always check the computer conformity.

IMPORTANT

Switch off the ignition or remove the RENAULT card from the card reader, check that

the side lights are off and wait for1 minute.

Finding the fault

typeNOTES

Use the diagram of the multiplex network of the vehicle

(diagram of the diagnostic socket).

Measure the resistance between connections 133B and 133C on the diagnostic socket.

What is the resistance?

0 The two lines are in short circuit (see Introduction: Repair advice).

Check that there is earth, + battery feed, + accessories feed or + after ignition feed

at the airbag computer and UCH terminals. To allocate the connections on the

computers and connections, use the vehicle diagrams forthe airbag computer (756)

and the UCH (645).

For each 133B and 133C connection between the different vehicle computers, check

there is no interference resistance and no short circuit to earth or to the + battery feed.

60 10

Between 70

and 110




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MULTIPLEXING


88B-16

MULTIPLEX NETWORK NOT OPERATIONAL (CONTINUED)

120 10 Open circuit on one or two lines.

Disconnect the airbag and check connections 133B and 133C between the diagnostic

socket (225) and the airbag (756).

Is the multiplex connection correct?

YES Check that the resistance is approximately 120 10

between the two network connections on the airbag computer:

If the resistance is not approximately 120 10 , contact

Techline.

If the resistance is 120 10 , check the continuity and

absence of interference resistance of connections 133B

and 133C between the diagnostic socket (225) and the UCH

(645).

If there is a repair procedure (See Technical Note 6015A,Repairing electrical wiring, Multiplex: Multiplex

network, Repair).

Check that the resistance is approximately 120 between the

two network connections on the UCH computer:

If the resistance is not approximately 120 , contact

Techline.

Repair the multiplex connection between the diagnostic socket

and the airbag.

If there is a repair procedure (See Technical Note 6015A,

Repairing electrical wiring, Multiplex: Multiplex network,Refurbishing).

If the fault is still present, contact your Techline.

NO




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MULTIPLEXING

Fault finding - Customer complaints 88B

88B-17

Fault finding - Customer complaints

NO DIALOGUE WITH THE COMPUTERS ALP 1

NO TOPOLOGY DIAGRAM OR CONFIGURATION TABLE

DISPLAY AT THE END OF THE MULTIPLEX NETWORK

TEST

ALP 2

CONFIGURATION TABLE DISPLAY AT THE END OF THE

MULTIPLEX NETWORK TESTALP 3


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MULTIPLEXING

Fault finding - Fault Finding Chart 88B

88B-18

Fault finding - Fault Finding Chart

ALP 1 No dialogue with computers

NOTES


Vehicle card in the card reader.

Press and hold (over5 seconds) the Start button in the absence of start conditions (for

example: selecting a gear).


IMPORTANT

To supply the discharge bulb computers, switch on the dipped headlights.

Use Technical Note Wiring diagram, Scnic II ph2.

Try the diagnostic tool on another vehicle.

Make sure the tool has a more recent update than CD 64.

Check:

The connection between the diagnostic tool and socket (connection and cable in good condition).

The computers' power supply.

The engine compartment and passenger compartment fuses.

Check the CLIP sensor is properly fed by connections BP32 (+ 12 V) and MAM, NAM (earths) of the diagnostic

socket, indicated by two red diodes lighting up on the sensor.

Make sure that the CLIP sensor is properly connected to the computer's USB port.

Make sure that the CLIP sensor is communicating properly with the vehicle's computers; this is indicated by thetwo green diodes on the sensor lighting up.

green LEDs red LEDs

Multiplex line Vehicle supply through diagnostic socket

ISO Sensor supply through USB port

Check for+ 12 V APC on the following connection:

AP43 between components 225 and 1337.

Check forpermanent + 12 V on the following connection:

BP32 between components 225 and 260.

Check the insulation, continuity and the absence of interference resistance on the connections between:

MAM between component 225 and the MAM earth.

NAM between component 225 and the NAM earth.

If there is repair procedure (see Technical Note 6015A, Repairing electrical wiring, wiring: Repair

precautions), repair the wiring; if not, replace it.


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MULTIPLEXING


88B-19

No dialogue on the multiplex line network

ALP 1

CONTINUED

NOTES


Vehicle card in the card reader.

Press and hold (over5 seconds) the Start button in the absence of start conditions (for

example: selecting a gear).


IMPORTANT

To supply the discharge bulb computers, switch on the dipped headlights.

Use Technical Note Wiring diagram, Scnic II ph2.

Check the continuity, insulation and absence of interference resistance on the following connections:

multiplex line H (133B between components 225 and 645).

multiplex line L (133C between components 225 and 645).

With a multimeter, make sure that the voltages at the diagnostic socket terminals are:

2.5 V between multiplex line H (connection 133B) and the earth (MAM, NAM).

2.5 V between multiplex line L (connection 133C) and the earth (MAM, NAM).

To detect a short circuit on the vehicle's multiplex network (See Introduction, Repair advice).


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MULTIPLEXING


88B-20

ALP 2No topology diagram or configuration table display at the end of

the multiplex network test

The topology cannot be displayed under the following conditions:

1. The two computers storing the multiplex network configuration have failed to respond.

2. The multiplex network is not operational, therefore dialogue is impossible.

3. The two computers storing the multiplex network configuration do not have the same configurations.

4. On the multiplex network tab on the configuration screen, an incorrect network version number has been

entered on one of the two computers storing the network configuration.

5. No network version has been entered on the two computers that store the configuration.

1 The two computers storing the multiplex network configuration have failed to respond.

Check first that the computers storing the configuration (Airbag and UCH) are correctly supplied (earth,+ battery, + accessories or + after ignition).

Check the condition of the multiplex network and the continuity and insulation of the multiplex line H and

multiplex line L lines between the computers storing the configuration.

2 The multiplex network is not operational, therefore dialogue is impossible (see Network not

operational fault).

3 The two computers that store the multiplex network configuration do not have the same configurations

(see Network configurations configuration).

4 On the multiplex network tab on the configuration screen, an incorrect network version has been

entered on one of the two computers storing the network configuration (see Network configurations

configuration).

5 No diagram version has been entered into the two calculators that store the configuration (see Network

configurations configuration).


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MULTIPLEXING


ALP 3Configuration table display at the end of the multiplex

network test

NOTES

ALP to use if the tool loads the configuration screen at the end of the multiplex

network test.

The configuration chart is always accessible through the Configuration icon.

Update the vehicle configuration then run the multiplex network test again.

Check that the two tabs are consistent before running the test again.

The CLIP diagnostic tool loads the configuration screen directly under the following conditions:

q MULTIPLEX NETWORK tab

Inconsistency between the network version numbers entered into the two computers that store themultiplex network configuration. If the numbers are inconsistent, the following error message is

displayed when the multiplex network test is being run: Inconsistent configuration of computers

supporting fault finding: check configuration before rerunning test.

Inconsistent list of computers entered into the computers that store the multiplex network configuration.

The diagram version number is incorrect for at least one of the two computers that store the multiplex

network configuration (see the Network configurations configuration).

In this instance, the following message is displayed when the multiplex network test is being run:

Unknown vehicle configuration: check tool update.

One of the two computers that store the network version is blank (case of replaced airbag or UCH

computer).

q COMPUTERS SUPPORTING FAULT FINDING tab

Inconsistent diagram numbers entered into the two computers that store the configuration. Inconsistency in the list of computers that can support fault finding entered into the two computers that

store the list of computers that can support fault finding.

Inconsistency between the list of computers entered and the computers actually detected on the

vehicle. Some computers are entered as absent in the computer that stores the network configuration

even though they are present on the vehicle (see the Multiplex network configurations

configuration). In this instance, the following error message is displayed when the multiplex network

test is being run: Some computers respond to the diagnostic tool even if they are not listed in the

computer configuration.

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defecte multiplexare