GDI -Troubleshooting 13A-172 OK Check the following items in that order. DCheck the sparkplug DCheck the compression pressure DCheck if foreign materials (water, alcohol, etc.) got into fuel. OK Clamp the leads of the ignition coil No.1 terminal with atiming light pick-up in order. Does thetiming lightflash when the engine iscranked?NOCheck the ignition coil (built-in power transistor) system (Refer to P.13A-148, code No.44.) From the previouspage OK Check the trouble symptoms. OK Check ignition coil spark for each cylinder. 1. Remove the ignition coil. 2. Install a new sparkplug to the removed ignitioncoil. 3. Disconnect the injector intermediate connector. Caution Never touch the connector terminal as approx. 100 V is applied to the injector, or you are seriously injured. 4. Earth the sparkplug electrodesecurely. 5. Check that the sparkplug igniteswhen theengine is cranked.NGReplace the ignition coil. YES Check the ignitiontimingwhen cranking. OK: approx. 5_BTDCNGCheck that the crankanglesensor andtiming beltcover are properly installed. Replace the injector.NG Inspection procedure 6 Initial combustion but no complete combustion (starting impossible), long time to start (hard starting) Probable cause In such cases as the above, the cause is probably that the spark plugs are generating sparks by the spark are weak, or the initial mixture is not appropriate.DMalfunction of fuel supply system DMalfunction of of fuel pressure control solenoid valve DMalfunction of the ignition system DMalfunction of the electronic-controlled throttle valve system DMalfunction of the engine-A/T-ECU OK MUT- IIData list 21 Engine coolant temperature sensor (Refer to P.13A-198.)NGCheck theengine coolant temperaturesensor system (Refer to P.13A-138, code No.21.) OK MUT- IISelf-Diag Code Is a diagnosis code set?YESRefer to P.13A-130, INSPECTION CHART FOR DIAGNOSIS CODES. Check the battery voltage when cranking. OK: 8 V or higherNGCheck the battery. NO MUT- IIActuator Test 07 Fuel pump(low pressure) (Refer to P.13A-203.)NGCheck fuelpumpsystem (low-pressure) (Refer to P.13A-193, Inspection procedure 29.) OK To the nextpage www.WorkshopManuals.co.uk Purchased from www.WorkshopManuals.co.uk
GDI -Troubleshooting 13A-174 Inspection procedure 7 Unstable idling (Rough idling, hunting) Probable cause The cause is probably a malfunction of the ignition system, air/fuel ratio control system, electronic controlled throttle valve system, compression pressure, etc. As many causes can be suspected, diagnose from easier items.DMalfunction of the ignition system DMalfunction of the air/fuel ratio control system DMalfunction of the electronic-controlled throttle valve system DPoor compression DAir sucking into the air intake system OK Check that air is sucked in the air intake system. DBroken intake manifold gasket DDamaged vacuum hose DDamaged air intake hoseOK To the nextpage OK MUT- IIData list 11 Oxygen sensor (Refer to P.13A-198.) OK: 0 - 400 mV and 600 - 1,000 mV alternates when the engine is idling(wait for 2 minutes after the en- gine is started).NGMeasure fuel high-pressure between the fuel pump (high pressure) and injector. (Refer to P.13A-222.) OK MUT- IIData list 11 Oxygen sensor (Refer to P.13A-198.) OK: 600 - 1,000 mV when theengine is suddenlyracedNG11 Oxygen sensor system check (Refer to P. 13A-131, code No.11.) OK MUT- IIActuator Test 08 Purge control solenoid valve (Refer to P.13A-203.)NGCheck the purge control solenoid valve system (Refer to P.13A-197, Inspection procedure 36.) OK MUT- IIData list 21 Engine coolant temperature sensor (Refer to P.13A-198.)NGCheck theengine coolant temperaturesensor system (Refer to P.13A-138, code No.21.) OK MUT- IIData list 25 Barometric pressure sensor (Refer to P.13A-198.)NGCheck the barometric pressure sensor system (Refer to P.13A-145, code No.25.) OK MUT- IIData list 13 Intake air temperature sensor (Refer to P.13A-198.)NGCheck the intake air temperature sensor system (Refer to P.13A-135, code No.13.) NO MUT- IIData list 26 Acceleratorpedal positionswitch (Refer to P.13A-198.)NGCheck the acceleratorpedal positionswitch system (Refer to P.13A-192, Inspection procedure 28.) OK Does theidlingspeed fluctuate excessively?YESDClean around the throttle valve. (Refer to P.13A-220) DAdjust the throttle position sensor (Refer to P.13A-220.) NO MUT- IIData list 79 Throttle position sensor (1st channel) (Refer to P.13A-198.)NGCheck the throttle valve position feedback system (Refer to P.13A-162, code No.92.) NO MUT- IISelf-Diag Code Is a diagnosis code set?YESRefer to P.13A-130, INSPECTION CHART FOR DIAGNOSIS CODES. Has the batterybeen disconnectedrecently?YESAfter warming-up, let theengine run at idling for 10 minutes. www.WorkshopManuals.co.uk Purchased from www.WorkshopManuals.co.uk
GDI -Troubleshooting 13A-177 Inspection procedure 9 When the engine is cold, it stalls at idling. (Die out) Probable cause In such cases as the above, the cause is probably that the air/fuel mixture is inappropriate when theengine iscold, or that the intake air volume is insufficient.DMalfunction of the electronic-controlled throttle valve system DMalfunction of the throttle body OK NG Replace the injector. Check the trouble symptoms. Check the following items in that order. DCheck the sparkplug DCheck the compression pressure DCheck theengine oilviscosity. OK Check ignition coil spark for each cylinder. 1. Remove the ignition coil. 2. Install a new sparkplug to the removed ignitioncoil. 3. Disconnect the injector intermediate connector. Caution Never touch the connector terminal as approx. 100 V is applied to the injector, or you are seriously injured. 4. Earth the sparkplug electrodesecurely. 5. Check that the sparkplug igniteswhen theengine is cranked.NGReplace the ignition coil. OK Check the ignition timing. (Refer to GROUP 11A - Engine Adjustment.)NGCheck that the crankanglesensor andtiming beltcover are properly installed. NO Measure fuel high-pressure between the fuel pump (high pressure) and injector. (Refer to P.13A-222.) OK Does theenginestall right after the acceleratorpedal is released?YESDClean around the throttle valve. (Refer to P.13A-220.) DAdjust the throttle position sensor. (Refer to P.13A-220.) OK MUT- IIData list 68 EGR valve (Refer to P.13A-198.)NGCheck the EGR valve system. (Refer to P.13A-196, Inspection procedure 35.) OK MUT- IIData list 21 Engine coolant temperature sensor (Refer to P.13A-198.)NGCheck theengine coolant temperaturesensor system. (Refer to P.13A-138, code No.21.) OK MUT- IIData list 26 Acceleratorpedal positionswitch (Refer to P.13A-198.)NGCheck the acceleratorpedal positionswitch system. (Refer to P.13A-192, Inspection procedure 28.) NO MUT- IIData list 14 Throttle position sensor (2nd channel) (Refer to P.13A-198.)NGCheck the throttle valve position feedback system. (Refer to P.13A-162, code No.92.) NO Is engine-idling stable after the warming-up?YESCheck the unstableidling (rough, hunting). (Refer to P.13A-174, Inspection procedure 7.) NO MUT- IISelf-Diag Code Is a diagnosis code set?YESRefer to P.13A-130, INSPECTION CHART FOR DIAGNOSIS CODES. Has the batterybeen disconnectedrecently?YESAfter warming-up, let theengine run at idling for 10 minutes. www.WorkshopManuals.co.uk Purchased from www.WorkshopManuals.co.uk
GDI -Troubleshooting 13A-178 Inspection procedure 10 When the engine becomes hot, it stalls at idling. (Die out) Probable cause In such cases as the above, the cause is probably that ignition system, air/fuel mixture, electronic-controlled throttle valve system, compression pressure is defective. In addition, if the engine suddenlystalls, the cause may also be a defective connector contact.DMalfunction of the ignition system DMalfunction of the air/fuel ratio control system DMalfunction of the electronic-controlled throttle valve system DMalfunction of the throttle body DImproper connector contact DDrawing air into intake system OK Check that air is sucked in the air intake system. DBroken intake manifoldgasket DDamaged vacuum hose DDamaged air intake hoseOK To the nextpage OK MUT- IIData list 11 Oxygen sensor (Refer to P.13A-198.) OK 0 - 400 mV and 600 - 1,000 mV alternates when the engine is idling(wait for 2 minutes after the en- gine is started).NGMeasure fuel high-pressure between the fuel pump (high pressure) and injector. (Refer to P.13A-222.) OK MUT- IIData list 11 Oxygen sensor (Refer to P.13A-198.) OK 600 - 1,000 mV when theengine is suddenlyraced.NGCheck Oxygen sensor system (Refer to P.13A-131, code No.11.) OK MUT- IIData list 21 Engine coolant temperature sensor (Refer to P.13A-198.)NGCheck theengine coolant temperaturesensor system. (Refer to P.13A-138, code No.21.) OK MUT- IIData list 25 Barometric pressure sensor (Refer to P.13A-198.)NGCheck the barometric pressure sensor system. (Refer to P.13A-145, code No.25.) OK MUT- IIData list 13 Intake air temperature sensor (Refer to P.13A-198.)NGCheck the intake air temperature sensor system. (Refer to P.13A-135, code No.13.) YES MUT- IIData list 26 Acceleratorpedal positionswitch (Refer to P.13A-198.)NGCheck the acceleratorpedal positionswitch system. (Refer to P.13A-192, Inspection procedure 28.) NO MUT- IIData list 79 Throttle position sensor (1st channel) (Refer to P.13A-198.)NGCheck the throttle valve position feedback system. (Refer to P.13A-162, code No.92.) NO MUT- IISelf-Diag Code Is a diagnosis code set?YESRefer to P.13A-130, INSPECTION CHART FOR DIAGNOSIS CODES. Has the batterybeen disconnectedrecently?YESAfter warming-up, let theengine run at idling for 10 minutes. OK Does theenginestall easilyagain?NOWhile carrying out an intermittent malfunction simulation test (Refer to GROUP 00 - Points to Note for Intermittent Malfunctions.), check for sudden changes in the signals shown below. DCrankanglesensor signal DInjector activating signal DLow pressure fuelpumpdrive signal DAir flow sensor DPrimary ignition signal DEngine-A/T-ECU power supply voltage www.WorkshopManuals.co.uk Purchased from www.WorkshopManuals.co.uk
GDI -Troubleshooting 13A-181 Inspection procedure 12 The engine stalls when decelerating. Probable cause The cause is probably an improper air/fuel ratio due to a faulty EGR system, or poor intake air volume due to a faulty electronic-controlled throttle valve system.DMalfunction of the electronic-controlled throttle valve system DMalfunction of the EGR valve OK Check the following items in that order. DCheck the sparkplug DClean around the throttle valve. (Refer to P.13A-220.) DAdjust the throttle position sensor (Refer to P.13A-220.) OK Check ignition coil spark for each cylinder. 1. Remove the ignition coil. 2. Install a new sparkplug to the removed ignitioncoil. 3. Disconnect the injector intermediate connector. Caution Never touch the connector terminal as approx. 100 V is applied to the injector, or you are seriously injured. 4. Earth the sparkplug electrodesecurely. 5. Check that the sparkplug igniteswhen theengine is cranked.NGReplace the ignition coil. NO MUT- IIData list 68 EGR valve (Refer to P.13A-198.)NGCheck the EGR valve system (Refer to P.13A-196, Inspection procedure 35.) OK Check the vehicle speed sensor system (Refer to P.13A-144, code No.24.)NGRepair OK MUT- IIData list 79 Throttle position sensor (1st channel) (Refer to P.13A-198.)NGCheck the throttle valve position feedback system (Refer to P.13A-162, code No.P92) NO MUT- IIData list 26 Acceleratorpedal positionswitch (Refer to P.13A-198.)NGCheck the acceleratorpedal positionswitch system. (Refer to P.13A-192, Inspection procedure 28) NO MUT- IISelf-Diag Code Is a diagnosis code set?YESRefer to P.13A-130, INSPECTION CHART FOR DIAGNOSIS CODES. Has the batterybeen disconnectedrecently?YESAfter warming-up, let theengine run at idling for 10 minutes. www.WorkshopManuals.co.uk Purchased from www.WorkshopManuals.co.uk
GDI -Troubleshooting 13A-189 Inspection procedure 24 Engine-A/T-ECU power supply and earth circuit system Probable cause The cause is probably the malfunction of the engine-A/T-ECU, or the malfunctions listed at right.DOpen circuit or short-circuited harness wire in the engine-A/T-ECU power supply circuit. DOpen circuit or short-circuited harness wire to earth in the engine-A/T-ECU. DMalfunction of the engine-A/T-ECU OK(5) NG OK Check the trouble symptoms. NG Repair (2), (3) NG Check the harness wire between the engine-A/T-ECU and the battery, and repair if necessary. OK Check the trouble symptoms. OK NG Check the harness wire between the engine-A/T-ECU and the ignition switch. Ignition switch check (Refer to GROUP 54 - Ignition Switch.) (4) NG Measure at engine-A/T-ECU connectors D-120, D-121. DDisconnect the connector, and measure at the harness side. (1) The voltage between terminal 98 and earth. (Ignition switch: ON) OK: System voltage (2) The voltage between terminal 49 and earth. OK: System voltage (3) The voltage between terminals 41 and 47 and earth. (Ignition switch: ON) OK: System voltage (When terminal 49 was connected to earth) (4) The continuity between terminals 42 and 48 and earth. OK: Continuity (5) The voltage between terminal 66 and earth OK: System voltage(1) NGCheck the following connectors: D-208, D-223 , E-13NG Repair OK Check the following connectors: D-120, D-121 NG Replace the engine-A/T-ECU. OK Check the trouble symptoms.Repair NG NG RepairCheck the following connectors: D-27, D-31 , D-223 , E-13 NG Check the following connector: D-128Repair NG Check the trouble symptoms. NG Check the harness wire between the engine-A/T-ECU and theengine control relay, and repair if necessary. OK Check the following connector: D-14Repair NG Check the trouble symptoms. NG Check the harness wire between the engine-A/T-ECU and earth, and repair if necessary. www.WorkshopManuals.co.uk Purchased from www.WorkshopManuals.co.uk
GDI -Troubleshooting 13A-190 Inspection procedure 25 Engine control relay, ignition switch-IG system Probable cause When an ignition switch ON signal is input to the engine-A/T-ECU, the engine-A/T-ECU turns the control relay ON. This causes system voltage to be supplied to the engine-A/T-ECU, sensors, and actuators.DMalfunction of the ignition switch DMalfunction of the control relay. DOpen circuit or short-circuited harness wire in the engine controlrelay circuit. DMalfunction of the engine-A/T-ECU Check the harness wire between the battery and theengine controlrelay, and repair if necessary. Check the engine-A/T-ECU power supply and earth circuit. (Refer to P.13A-189, Inspection procedure 24.)OK OK Measure at control relay connector B-25X. DDisconnect the connector, and measure at the harness side. DThe voltage between 2, 3 and earth OK: System voltageNG Check the control relay. (Refer to P.13A-227.)NG Replace Inspection procedure 26 Injector driver relay system Probable cause When an ignition switch ON signal is input to the engine-A/T-ECU, the engine-A/T-ECU turns the injector driver relay ON. This causes system voltage to be supplied to the injector driver.DMalfunction of the injector driver relay. DOpen or short circuit, or loose connector contact DMalfunction of the engine-A/T-ECU OK Check the trouble symptoms. OK Check the trouble symptoms. OK Check the trouble symptoms. Check the injector driver relay (Refer to P.13A-227.)NG Replace OK (1) NG Check the harness wire between the injector driver relay and the battery, and repair if necessary. (2)NG Check the following connectors: D-208, D-223 , E-13 OK Check the trouble symptoms. NG Check the harness wire between the injector driver relay and the ignition switch, and repair if necessary. OK Measure at engine-A/T-ECU connector D-119. DDisconnect the connector, and measure at the harness side. DThe voltage between terminal 6 and earth (Ignition switch: ON) OK: System voltageNGCheck the following connector: B-28X NG Check the harness wire between the injector driver relay and the engine-A/T-ECU, and repair if necessary. OK Check the following connector: D-119 NG Measure at injector driver connector B-121. DConnect the connector. DThe voltage between terminal 4, 12, 21 and earth (Ignition switch: ON) OK: System voltageNGCheck the following connector: B-28X OK Check the injector driver system. (Refer to P.13A-196, Inspection procedure 34.) NG Check the harness wire between the injector driver relay and the injector driver, and repair if necessary.NG Repair NG Repair NG Repair NG Repair Measure at the injector driver relay connector B-28X. DDisconnect the connector, and measure at the harness side. (1) The voltage between terminal 3 and earth OK: System voltage (2) The voltage between terminal 4 and earth (Ignition switch: ON) OK: System voltage www.WorkshopManuals.co.uk Purchased from www.WorkshopManuals.co.uk
GDI -Troubleshooting 13A-195 Inspection procedure 32 Stop lamp switch system Probable cause The engine-A/T-ECU determines whether the brakepedal is depressed or not. The engine-A/T-ECU selects a fuel injectionmode by determining thebrake operation according to this information.DMalfunction of the stoplampswitch DImproper connector contact,opencircuit or short-circuited harness wire DMalfunction of the engine-A/T-ECU NG Check the following connectors: D-26 , D-27, D-124 NG Repair OK Check the trouble symptoms. OK Check the following connector: D-122NG Repair Stoplampswitch check (Refer to GROUP 35 - Brake Pedal.)NG Replace OK Measure at stoplampswitch connector D-136. DDisconnect the connector, and measure at the harness side. DThe voltage between terminal 2 and earth OK System voltageOKMeasure at the engine-A/T-ECU connector D-122. DDisconnect the connector, and measure at the harness side. DThe voltage between terminal 123 and earth (Ignition switch: ON) OK 0 - 3 V (when the brake pedal is not depressed) System voltage (when the brakepedal is depressed)NG NG Repair OK Check the trouble symptoms. NG Check the harness wire between the engine-A/T-ECU and the stoplamp switch, and repair if necessary. NG Check the harness wire between the battery and the stoplampswitch, and repair if necessary. OK Check the trouble symptoms.NGReplace the engine-A/T-ECU. Check the following connectors: D-26 , D-33, D-128, D-136, D-124 , E-13 Inspection procedure 33 Small lamp switch system Probable cause The engine-A/T-ECU determines whether the smalllampswitch is on or off. According to that information, the engine-A/T-ECU controls alternator output current when the vehicle is started.DImproper connector contact,opencircuit or short-circuited harness wire in thetaillamprelay circuit. DMalfunction of the engine-A/T-ECU OK Check the following connector: D-121NGReplace Measure at engine-A/T-ECU connector D-121. DDisconnect the connector, and measure at the harness side. DThe voltage between terminal 86 and earth (Lighting switch: ON) OK: System voltageNGCheck thetaillampcircuit. (Refer to ELECTRICAL WIRING.) OK Check the trouble symptoms. NG Replace the engine-A/T-ECU. www.WorkshopManuals.co.uk Purchased from www.WorkshopManuals.co.uk
