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ACCELERATOR CONTROL, FUEL & EXHAUST SYSTEMS SECTION FE CONTENTS QG PREPARATION ...............................................................2 Special Service Tools ..................................................2 Commercial Service Tools ...........................................2 ACCELERATOR CONTROL SYSTEM ...........................3 Removal and Installation .............................................3 Adjusting Accelerator Wire ..........................................3 MODELS WITH THROTTLE OPENER .........................3 MODELS WITHOUT THROTTLE OPENER ..................4 FUEL SYSTEM ................................................................5 Checking Fuel Lines ....................................................5 Removal and Installation .............................................5 Fuel Tank .....................................................................6 REMOVAL.................................................................7 INSTALLATION........................................................ 11 Fuel Pump, Fuel Level Sensor Unit and Fuel Filter ...........................................................................12 REMOVAL...............................................................12 INSTALLATION........................................................14 EXHAUST SYSTEM ......................................................15 Checking Exhaust System.........................................15 Removal and Installation ...........................................15 YD PREPARATION .............................................................18 Special Service Tool ..................................................18 Commercial Service Tool ...........................................18 ACCELERATOR CONTROL SYSTEM .........................19 Removal and Installation ...........................................19 Inspection...................................................................19 FUEL SYSTEM ..............................................................20 Checking Fuel Lines ..................................................20 Water Draining from Fuel Filter .................................20 DRAINING WATER ..................................................20 FUEL FILTER CHECK..............................................20 Changing Fuel Filter ..................................................20 REMOVAL...............................................................20 INSTALLATION........................................................21 Bleeding Fuel Filter....................................................21 Checking Priming Pump ............................................21 Checking Water in Fuel Filter Sensor (where fitted) ..........................................................................22 Removal and Installation ...........................................22 Fuel Tank ...................................................................23 REMOVAL...............................................................25 INSTALLATION........................................................28 Fuel Level Sensor Unit ..............................................29 REMOVAL...............................................................30 INSTALLATION........................................................31 EXHAUST SYSTEM ......................................................32 Checking Exhaust System.........................................32 Removal and Installation ...........................................32

Nissan N16 Fuel and Emmission

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ACCELERATOR CONTROL, FUEL &EXHAUST SYSTEMSSECTION FECONTENTSQGPREPARATION ...............................................................2Special Service Tools ..................................................2Commercial Service Tools...........................................2ACCELERATOR CONTROL SYSTEM...........................3Removal and Installation .............................................3Adjusting Accelerator Wire ..........................................3MODELS WITH THROTTLE OPENER.........................3MODELS WITHOUT THROTTLE OPENER..................4FUEL SYSTEM................................................................5Checking Fuel Lines....................................................5Removal and Installation .............................................5Fuel Tank .....................................................................6REMOVAL.................................................................7INSTALLATION........................................................ 11Fuel Pump, Fuel Level Sensor Unit and FuelFilter ...........................................................................12REMOVAL...............................................................12INSTALLATION........................................................14EXHAUST SYSTEM ......................................................15Checking Exhaust System.........................................15Removal and Installation ...........................................15YDPREPARATION .............................................................18Special Service Tool ..................................................18Commercial Service Tool ...........................................18ACCELERATOR CONTROL SYSTEM.........................19Removal and Installation ...........................................19Inspection...................................................................19FUEL SYSTEM..............................................................20Checking Fuel Lines..................................................20Water Draining from Fuel Filter .................................20DRAINING WATER..................................................20FUEL FILTER CHECK..............................................20Changing Fuel Filter ..................................................20REMOVAL...............................................................20INSTALLATION........................................................21Bleeding Fuel Filter....................................................21Checking Priming Pump............................................21Checking Water in Fuel Filter Sensor (wherefitted) ..........................................................................22Removal and Installation ...........................................22Fuel Tank ...................................................................23REMOVAL...............................................................25INSTALLATION........................................................28Fuel Level Sensor Unit ..............................................29REMOVAL...............................................................30INSTALLATION........................................................31EXHAUST SYSTEM ......................................................32Checking Exhaust System.........................................32Removal and Installation ...........................................32Special Service ToolsNJFE0029Tool numberTool nameDescriptionKV10114400Heated oxygen sensorwrenchNT636Loosening or tightening front and rearheated oxygen sensorsa: 22 mm (0.87 in)KV999G0010Fuel tank lock ringsocketNT057Removing and installing fuel tank lockringCommercial Service ToolsNJFE0030Tool numberTool nameDescriptionOxygen sensor threadcleanerAEM488Reconditioning the exhaust system threadsbefore installing a new oxygen sensor (Usewith anti-seize lubricant shown below.)a: 18 mm dia. with pitch 1.5 mm for zir-conia oxygen sensorb: 12 mm dia. with pitch 1.25 mm fortitania oxygen sensorAnti-seize lubricant(Permatex 133AR orequivalent meeting MILspecification MIL-A-907)AEM489Lubricating oxygen sensor thread cleaningtool when reconditioning exhaust systemthreadsPREPARATIONQGSpecial Service ToolsFE-2Removal and InstallationNJFE0002CAUTION:+ When removing accelerator wire, make a mark to indicate lock nuts initial position.+ Check that throttle valve opens fully when accelerator pedal is fully depressed. Also check that itreturns to idle position when pedal is released.+ Check accelerator control parts for improper contact with any adjacent parts.+ When connecting accelerator wire, be careful not to twist or scratch wire.YFE006SEF793WBAdjusting Accelerator WireNJFE0003MODELS WITH THROTTLE OPENERNJFE0003S011. Remove the vacuum hose connected to the throttle opener.2. Connect suitable vacuum hose to vacuum pump as shown left.3. Apply vacuum [more than 40.0 kPa (400 mbar, 300 mmHg,11.81 inHg)] until the throttle drum becomes free from the rodof the throttle opener.Makesurethat thereisclearancebetweenthethrottledrum and rod.If NG, refer to EC-202, Basic Inspection.If OK, go to following step.ACCELERATOR CONTROL SYSTEMQGRemoval and InstallationFE-3SFE248AB4. Loosen lock nut.5. Tightenacceleratoradjustingnut until throttledrumstartstomove.6. From that position, turn back adjusting nut 1.5 to 2 turns, andsecure lock nut.7. Release vacuum from the throttle opener.8. Removevacuumpumpandvacuumhosefromthethrottleopener.9. Reinstall the original vacuumhose to the throttle openersecurely.NFE020MODELS WITHOUT THROTTLE OPENERNJFE0003S021. Loosenlocknut,andtightenadjustingnutuntil throttledrumstarts to move.2. From that position turn back adjusting nut 1.5 to 2 turns, andsecure lock nut.ACCELERATOR CONTROL SYSTEMQGAdjusting Accelerator Wire (Contd)FE-4SMA803AChecking Fuel LinesNJFE0009Inspect fuel lines and tank for improper attachment, leaks, cracks,damage, loose connections, chafing or deterioration.If necessary, repair or replace faulty parts.MMA104ACAUTION:Tighten high-pressure rubber hose clamp so that clamp end is3 mm (0.12 in) from hose end.Tighteningtorquespecificationsarethesameforall rubberhose clamps.Ensure that screw does not contact adjacent parts.Removal and InstallationNJFE0004WARNING:When replacing fuel line parts, be sure to observe the following.+ Put a CAUTION: FLAMMABLE sign in workshop.+ Be sure to furnish workshop with a CO2 fire extinguisher.+ Do not smoke while servicing fuel system. Keep open flames and sparks away from work area.CAUTION:+ Before removing fuel line parts, carry out the following procedures:a) Put drained fuel in an explosion-proof container and put the lid on securely.b) Release fuel pressure from fuel line. Refer to EC-40, Fuel Pressure Release.c) Disconnect battery ground cable.+ Always replace O-ring and clamps with new ones.+ Do not kink or twist tubes when they are being installed.+ Do not tighten hose clamps excessively to avoid damaging hoses.+ After installing tubes, run engine and check for fuel leaks at connections.FUEL SYSTEMQGChecking Fuel LinesFE-5Fuel TankNJFE0006JFE607AFUEL SYSTEMQGFuel TankFE-6SFE649AJFE613AREMOVALNJFE0006S01For SedanNJFE0006S01011. Release fuel pressure from fuel line.Refer to EC-40, Fuel Pressure Release.2. Disconnect battery ground cable.3. Open fuel filler lid and filler cap.4. Drain fuel from fuel tank.5. Removerear seat cushion. Refer toBT-60, Removal andInstallation.6. Remove inspection hole cover under the rear seat.FUEL SYSTEMQGFuel Tank (Contd)FE-7JFE608A7. Disconnect electrical connector.8. Disconnect the quick connector as follows.a. Put mating marks on tubes and connectors for correctinstallation.SFE562AJFE628Ab. Hold the connector while pushing in tabs, and pull out the tube.CAUTION:+ Thetubecanberemovedwhenthetabsarecompletelydepressed. Do not twist it more than necessary.+ Do not use any tools to remove the quick connector.+ Keep the resin tube away from heat. Be especially carefulwhen welding near the tube.+ Preventacidliquidsuchasbatteryelectrolyteetc. fromgetting on the resin tube.+ Donot bendor twist thetubeduringinstallationandremoval.+ Onlywhenthetubeisreplaced, removetheremainingretainer.+ When the tube is replaced, also replace the retainer witha new one.Retainer color:Orange (Feed hose side)White (Return hose side)JFE609A9. Remove exhaust center tube.10. From rear left area of fuel tank, remove filler hose, vent hoseand EVAP hose.CAUTION:Topreventfuelfromflowingout,installablindcapimmedi-ately after the fuel hose is disconnected.JFE610A11. Set a suitable transmission jack under fuel tank.12. Removefuel tankmountingbandboltswhilesupportingfueltank.FUEL SYSTEMQGFuel Tank (Contd)FE-8JFE611A13. Lower the fuel tank by 70 to 80 mm (2.76 to 3.15 in), removethe nuts and clips holding the protector, and then remove theprotector.+ To remove the clips, use pliers to squeeze the extensions asshown by the arrows in the figure at left, and then remove theclip from above.14. Remove fuel tank.JFE613AFor HatchbackNJFE0006S01021. Disconnect battery ground cable.2. Open fuel filler lid and filler cap.3. Drain fuel from fuel tank.4. Removerear seat cushion. Refer toBT-60, Removal andInstallation.5. Remove inspection hole cover under the rear seat.SFE639ASFE640A6. Disconnect electrical connector.7. Disconnect the quick connector as follows.a. Put mating marks on tubes and connectors for correct instal-lation.SFE562Ab. Hold the connector while pushing in tabs, and pull out the tube.CAUTION:+ Thetubecanberemovedwhenthetabsarecompletelydepressed. Do not twist it more than necessary.+ Do not use any tools to remove the quick connector.+ Keep the resin tube away from heat. Be especially carefulwhen welding near the tube.+ Preventacidliquidsuchasbatteryelectrolyteetc. fromgetting on the resin tube.+ Donot bendor twist thetubeduringinstallationandremoval.FUEL SYSTEMQGFuel Tank (Contd)FE-9SFE650A8. From rear left area of fuel tank, remove filler hose, vent hose,and EVAP hose.CAUTION:Topreventfuelfromflowingout,installablindcapimmedi-ately after the fuel hose is disconnected.SFE642A9. Remove exhaust center tube.SFE643A10. Remove heat insulators from fuel tank side.SFE644A11. Set a suitable transmission jack under fuel tank.12. Removefuel tankmountingbandboltswhilesupportingfueltank.13. Remove fuel tank.FUEL SYSTEMQGFuel Tank (Contd)FE-10SFE560AASFE657AINSTALLATIONNJFE0006S02To install, reverse the removal procedure. Connect the quick con-nector as follows:+ Align mating marks on tubes and connectors for correct instal-lation.+ Insert tubeintothecenterof theconnectoruntil youhearaclick.SFE561AASFE658AAfter connectingquickconnector, makesuretheconnectionisfirmly made using the following method.+ Pull on the fuel tube and connector to make sure they are firmlyconnected.+ Start the engine, increase engine speed and verify that thereare no leaks.FUEL SYSTEMQGFuel Tank (Contd)FE-11Fuel Pump, Fuel Level Sensor Unit and FuelFilterNJFE0007SFE671AJFE613AREMOVALNJFE0007S01For SedanNJFE0007S01011. Release fuel pressure from fuel line.Refer to EC-40, Fuel Pressure Release.2. Disconnect battery ground cable.3. Open fuel filler lid and filler cap.4. Removerear seat cushion. Refer toBT-60, Removal andInstallation.5. Remove inspection hole cover under the rear seat.JFE608A6. Disconnect electrical connector.7. Disconnect the quick connectors.+ Fordisconnect of quickconnectors, refertostep8. of FuelTank Removal.8. Remove the six screws and retainer.CAUTION:Use genuine bolts only when fixing retainer.FUEL SYSTEMQGFuel Pump, Fuel Level Sensor Unit and Fuel FilterFE-12SFE564A9. Pull out the fuel level sensor unit and fuel pump.+ Do not damage the arm of the fuel level sensor unit andfuel tank temperature sensor.JFE614A10. Remove fuel pump as shown in the figure at left.+ Put mating marks on fuel pump and fuel filter for correct instal-lation.JFE615A11. Disconnect fuel pump harness connector.JFE616A12. Remove fuel filter from fuel level sensor unit as shown in thefigure at left.+ Put matingmarksonfuel filterandfuel level sensorunit forcorrect installation.JFE613AFor HatchbackNJFE0007S01021. Disconnect battery ground cable.2. Open fuel filler lid and filler cap.3. Removerear seat cushion. Refer toBT-60, Removal andInstallation.4. Remove inspection hole cover under the rear seat.FUEL SYSTEMQGFuel Pump, Fuel Level Sensor Unit and Fuel Filter (Contd)FE-13SFE639A5. Disconnect electrical connector.6. Disconnect the quick connectors.+ Fordisconnect of quickconnectors, refertostep7. of FuelTank Removal.SFE376A7. Remove lock ring using a lock ring socket (SST).SFE648A8. Pull out the fuel level sensor unit and fuel pump.+ Do not damage the arm of the fuel level sensor unit andfuel tank temperature sensor.INSTALLATIONNJFE0007S02Installation is in reverse order of removal.FUEL SYSTEMQGFuel Pump, Fuel Level Sensor Unit and Fuel Filter (Contd)FE-14SMA211AChecking Exhaust SystemNJFE0010Check exhaust pipes, muffler and mounting for improperattachment, leaks, cracks, damage, chafing or deterioration.Removal and InstallationNJFE0005CAUTION:+ Always replace exhaust gaskets withnewones whenreassembling.+ With engine running, check all tube connections forexhaust gas leaks, and entire system for unusual noises.+ Checktoensurethat mountingbracketsandmountinginsulators are installed properly and free fromunduestress. Improper installation could result in excessivenoise or vibration.+ Discard any heated oxygen sensor which has beendropped from a height of more than 0.5 m (19.7 in) onto ahard surface such as a concrete floor; use a new one.+ Before installing a new oxygen sensor, clean exhaust sys-tem threads using oxygen sensor thread cleaner tool andapply anti-seize lubricant.+ Do not overtorque the oxygen sensor. Doing so maycause damage to the oxygen sensor, resuiting in the MILcoming on.+ Besuretousegenuineexhaustsystempartswhicharedesigned especially for heat resistance, corrosionresistance, and shape.+ Performthe operation with the exhaust systemfullycooled down because the system will be heated just afterthe engine stops.+ Be careful not to cut your hand on the insulator edge.EXHAUST SYSTEMQGChecking Exhaust SystemFE-15SFE632AAEXHAUST SYSTEMQGRemoval and Installation (Contd)FE-16SFE673AEXHAUST SYSTEMQGRemoval and Installation (Contd)FE-17Special Service ToolNJFE0031Tool numberTool nameDescriptionKV999G0010Fuel tank lock ringsocketNT057Removing and installing fuel tank lockringCommercial Service ToolNJFE0027Tool name DescriptionFuel filter wrenchNT553Removing fuel filtera: Max. 100 mm (3.94 in) dia.PREPARATIONYDSpecial Service ToolFE-18Removal and InstallationNJFE0013CAUTION:+ Do not disassemble the accelerator pedal assembly. Do not remove the sensors and the switchesfrom the assembly.+ Avoid impact from dropping etc. during handling.+ Be careful to keep the assembly away from water.+ Do not adjust the adjusting screw (painted white) of the accelerator work unit.+ When the connector of the accelerator sensor is disconnected, reconnect the connector, and touchCLEAR in OFF ACCEL PO SIG of the active test using the CONSULT-II. Or, warm up the engine,then leave it idling for approximately 10 minutes.SFE629AInspectionNJFE0020+ Checkthat theacceleratorpedal movessmoothlywithinthewhole operation range.+ Check that the accelerator pedal securely returns to the origi-nal position.+ Check that the drum of the accelerator work unit can be fullyopened.+ RefertoEC-641,BasicInspectionfortheinspectionoftheaccelerator work unit and the accelerator pedal switch.ACCELERATOR CONTROL SYSTEMYDRemoval and InstallationFE-19SMA803AChecking Fuel LinesNJFE0019Inspect fuel lines and tank for improper attachment, leaks, cracks,damage, chafing and deterioration.If necessary, repair or replace.MMA104ACAUTION:Tighten high-pressure rubber hose clamp so that clamp end is3 mm (0.12 in) from hose end.Tighteningtorquespecificationsarethesameforall rubberhose clamps.Ensure that screw does not contact adjacent parts.SMA794CWater Draining from Fuel FilterNJFE0028DRAINING WATERNJFE0028S01Open drain valve at the bottom of fuel filter.FUEL FILTER CHECKNJFE0028S02Checkfuel filter for fuel leakage, damageandother abnormalsings.JFE598AChanging Fuel FilterNJFE0021REMOVALNJFE0021S011. Take out air duct and upper air cleaner case.2. Remove connector from water in fuel filter sensor.3. Remove fuelfilter using a fuelfilter wrench (commercialser-vice tool).CAUTION:Do not spill the fuel during removal. If the fuel is spilt, imme-diatelywipeit off. Beespeciallycareful toprevent thefuelfrom adhering to the insulators of the engine mounts.4. Remove water in fuel filter sensor from fuel filter.FUEL SYSTEMYDChecking Fuel LinesFE-20JFE624AINSTALLATIONNJFE0021S02+ Install in the reverse order of removal.+ Replace the O-ring of the fuel level warning sensor with a newone.+ Tightenthefuel filter sothat thesealingfacecontactsthepacking, then retighten it manually by approximately 2/3 turn.+ Afterinstallation, operatetheprimingpumpverticallytoper-form air bleeding.Refer to FE-22, Bleeding Fuel Filter.Bleeding Fuel FilterNJFE00231. After the repair, bleed air from the piping by pumping the prim-ing pump up and down until it becomes heavy.2. Tostart theengine, rotatethestarter for amaximumof 30seconds.To start the engine more quickly, crank the engine while pump-ing the priming pump (requires two workers).3. If the engine does not start after rotating the starter for a maxi-mum of 30 seconds, stop it once, and pump the priming pumpagain until it becomes heavy.4. Rotate the starter again until the engine starts running.5. After the engine starts, let it idle for at least 1 minute to stabi-lize the behavior.+ When air is bled completely, the pumping of the primingpump suddenly becomes heavy. Stop the operation at thattime.+ If it is difficult to bleed air by the pumping of the primingpump (the pumping of the priming pump does not becomeheavy), disconnect the fuel supply hose between the fuelfilter and the injection pump. Then, perform the operationdescribed above, and make sure that fuel comes out. (Useapan, etc. soasnottospill fuel. Donotletfuel getonengine and other parts.) After that, connect the hose, thenbleed air again.+ Start engineandlet it idleforat least oneminuteafterperforming air bleeding.DEF017Checking Priming PumpNJFE0024Beforecheckingprimingpump, makesurethatfuel filterisfilled with fuel.1. Disconnect fuel return hose.Place a suitable container beneath hose end.2. Pump priming pump and check that the fuel overflows from thehose end. If not, replace priming pump.FUEL SYSTEMYDChanging Fuel Filter (Contd)FE-21SEF122UChecking Water in Fuel Filter Sensor (wherefitted)NJFE00251. Remove the connector from filter and water in fuelfilter sen-sor.2. TurnthekeyswitchON. Lift thefloat toensurethat thewarning lamp turns on.Water in fuel filter sensor tightening torque:: 3.9 - 5.9 Nm (0.4 - 0.6 kg-m, 35 - 52 in-lb)Discard the old O-ring and replace it with a new one.Removal and InstallationNJFE0015WARNING:When replacing fuel line parts, be sure to observe the following.+ Put a CAUTION: FLAMMABLE sign in workshop.+ Be sure to furnish workshop with a CO2 fire extinguisher.+ Do not smoke while servicing fuel system. Keep open flames and sparks away from work area.CAUTION:+ Before removing fuel line parts, carry out the following procedures:a) Put drained fuel in an explosion-proof container and put the lid on securely.b) Disconnect battery ground cable.+ Always replace O-ring and clamps with new ones.+ Do not kink or twist tubes when they are being installed.+ Do not tighten hose clamps excessively to avoid damaging hoses.+ After installing tubes, run engine and check for fuel leaks at connections.FUEL SYSTEMYDChecking Water in Fuel Filter Sensor (where fitted)FE-22Fuel TankNJFE0016SFE599AAFUEL SYSTEMYDFuel TankFE-23SFE638AFUEL SYSTEMYDFuel Tank (Contd)FE-24JFE613ASFE600ASFE601AREMOVALNJFE0016S01For SedanNJFE0016S01011. Disconnect battery ground cable.2. Open fuel filler lid and filler cap.3. Drain fuel from fuel tank.4. Removerear seat cushion. Refer toBT-60, Removal andInstallation.5. Remove inspection hole cover under the rear seat.6. Disconnect electrical connector.7. Disconnect the quick connector as follows.a. Put mating marks on tubes and connectors for correctinstallation.SFE562AJFE628Ab. Hold the connector while pushing in tabs, and pull out the tube.CAUTION:+ Thetubecanberemovedwhenthetabsarecompletelydepressed. Do not twist it more than necessary.+ Do not use any tools to remove the quick connector.+ Keep the resin tube away from heat. Be especially carefulwhen welding near the tube.+ Preventacidliquidsuchasbatteryelectrolyteetc. fromgetting on the resin tube.+ Donot bendor twist thetubeduringinstallationandremoval.+ Onlywhenthetubeisreplaced, removetheremainingretainer.+ When the tube is replaced, also replace the retainer witha new one.Retainer color:Orange (Feed hose side)White (Return hose side)FUEL SYSTEMYDFuel Tank (Contd)FE-25SFE602A8. Remove exhaust center tube.9. From rear left area of fuel tank, remove filler hose, vent hose,and EVAP hose.CAUTION:Topreventfuelfromflowingout,installablindcapimmedi-ately after the fuel hose is disconnected.JFE610A10. Set a suitable transmission jack under fuel tank.11. Removefuel tankmountingbandboltswhilesupportingfueltank.JFE611A12. Lower the fuel tank by 70 to 80 mm (2.76 to 3.15 in), removethe nuts and clips holding the protector, and then remove theprotector.+ To remove the clips, use pliers to squeeze the extensions asshown by the arrows in the figure at left, and then remove theclip from above.13. Remove fuel tank.FUEL SYSTEMYDFuel Tank (Contd)FE-26JFE613ASFE639ASFE640AFor HatchbackNJFE0016S01021. Disconnect battery ground cable.2. Open fuel filler lid and filler cap.3. Drain fuel from fuel tank.4. Removerear seat cushion. Refer toBT-60, Removal andInstallation.5. Remove inspection hole cover under the rear seat.6. Disconnect electrical connector.7. Disconnect the quick connector as follows.a. Put mating marks on tubes and connectors for correct instal-lation.SFE562Ab. Hold the connector while pushing in tabs, and pull out the tube.CAUTION:+ Thetubecanberemovedwhenthetabsarecompletelydepressed. Do not twist it more than necessary.+ Do not use any tools to remove the quick connector.+ Keep the resin tube away from heat. Be especially carefulwhen welding near the tube.+ Preventacidliquidsuchasbatteryelectrolyteetc. fromgetting on the resin tube.+ Donot bendor twist thetubeduringinstallationandremoval.SFE641A8. From rear left area of fuel tank, remove filler hose, vent hose,and EVAP hose.CAUTION:Topreventfuelfromflowingout,installablindcapimmedi-ately after the fuel hose is disconnected.FUEL SYSTEMYDFuel Tank (Contd)FE-27SFE642A9. Remove exhaust center tube.SFE643A10. Remove heat insulators from fuel tank side.SFE644A11. Set a suitable transmission jack under fuel tank.12. Removefuel tankmountingbandboltswhilesupportingfueltank.13. Remove fuel tank.SFE560ABSFE657AAINSTALLATIONNJFE0016S02To install, reverse the removal procedure. Connect the quick con-nector as follows:+ Align mating marks on tubes and connectors for correct instal-lation.+ Insert tubeintothecenterof theconnectoruntil youhearaclick.FUEL SYSTEMYDFuel Tank (Contd)FE-28SFE561ABSFE658AAAfter connectingquickconnector, makesuretheconnectionisfirmly made using the following method.+ Pull on the fuel tube and connector to make sure they are firmlyconnected.+ Start the engine, increase engine speed and verify that thereare no leaks.Fuel Level Sensor UnitNJFE0032SFE645AFUEL SYSTEMYDFuel Tank (Contd)FE-29JFE613AREMOVALNJFE0032S01For SedanNJFE0032S01011. Disconnect battery ground cable.2. Open fuel filler lid and filler cap.3. Removerear seat cushion. Refer toBT-60, Removal andInstallation.4. Remove inspection hole cover under the rear seat.SFE600A5. Disconnect electrical connector.6. Disconnect the quick connectors.+ Fordisconnect of quickconnectors, refertostep7. of FuelTank Removal.7. Remove the six screws.CAUTION:Use genuine bolts only when fixing retainer.8. Remove retainer.SFE646A9. Pull out the fuel level sensor unit.+ Do not damage the arm of the fuel level sensor unit.JFE613AFor HatchbackNJFE0032S01021. Disconnect battery ground cable.2. Open fuel filler lid and filler cap.3. Removerear seat cushion. Refer toBT-60, Removal andInstallation.4. Remove inspection hole cover under the rear seat.SFE639A5. Disconnect electrical connector.6. Disconnect the quick connectors.+ Fordisconnect of quickconnectors, refertostep7. of FuelTank Removal.FUEL SYSTEMYDFuel Level Sensor Unit (Contd)FE-30SFE376A7. Remove lock ring using a lock ring socket (SST).SFE648AA8. Pull out the fuel level sensor unit and fuel pump.+ Do not damage the arm of the fuel level sensor unit.INSTALLATIONNJFE0032S02Installation is in reverse order of removal.FUEL SYSTEMYDFuel Level Sensor Unit (Contd)FE-31SMA211AChecking Exhaust SystemNJFE0022Check exhaust pipes, muffler and mounting for improperattachment, leaks, cracks, damage, chafing or deterioration.SEF180ARemoval and InstallationNJFE0018CAUTION:+ Always replace exhaust gaskets withnewones whenreassembling. If gasket remains on flange surface, scrapeoff completely as shown at left.+ With engine running, check all tube connections forexhaust gas leaks, and entire system for unusual noises.+ Checktoensurethat mountingbracketsandmountinginsulators are installed properly and free fromunduestress. Improper installation could result in excessivenoise or vibration.+ Besuretousegenuineexhaustsystempartswhicharedesigned especially for heat resistance, corrosionresistance, and shape.+ Performthe operation with the exhaust systemfullycooled down because the system will be heated just afterthe engine stops.+ Be careful not to cut your hand on the insulator edge.EXHAUST SYSTEMYDChecking Exhaust SystemFE-32SFE734AEXHAUST SYSTEMYDRemoval and Installation (Contd)FE-33EXHAUST SYSTEMRemoval and Installation (Contd)FE-34