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-176 Inspection procedure 8 Idling speed is high or low (Improper idling speed) Probable cause The cause is probably that the intake airamount during idling is too great or too small.DMalfunction of the electronic-controlled throttle valve system DMalfunction of the throttle body OK DClean around the throttle valve. (Refer to P.13A-220.) DAdjust the throttle position sensor (Refer to P.13A-220.) OK MUT- IIData list 67 Stoplampswitch (Refer to P.13A-198.)NGCheck the stoplampswitch system (Refer to P.13A-195, Inspection procedure 32.) OK MUT- IIData list 28 A/C switch (Refer to P.13A-198.)NGCheck the A/C switch and A/C relay system (Refer to P.13A-194, Inspection procedure 31.) 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.) 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.) MUT- IISelf-Diag Code Is a diagnosis code set?YESRefer to P.13A-130, INSPECTION CHART FOR DIAGNOSIS CODES. 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.) 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-182 Inspection procedure 13 Hesitation, sag, stumble, poor acceleration or surge 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.DMalfunction of the ignition system DMalfunction of the air/fuel ratio control system DMalfunction of the electronic-controlled throttle valve system DImproper compression pressure DAir stuck in the air intake system NO NG Check that the crankanglesensor andtiming beltcover are properly installed. OK Check that air is sucked in the air intake system. DBroken intake manifold gasket DDamaged vacuum hose DDamaged air intake hose OK To the nextpage 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 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 suddenlyracedNGCheck the oxygen sensor system. (Refer to P.13A-131, code No.11.) 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.92.) 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.) 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.) Check the ignition timing. (Refer to GROUP11A - Engine Adjustment) MUT- IISelf-Diag Code Is a diagnosis code displayed?YESRefer to P.13A-130, INSPECTION CHART FOR DIAGNOSIS CODES. OK www.WorkshopManuals.co.uk Purchased from www.WorkshopManuals.co.uk
GDI -Troubleshooting 13A-185 Inspection procedure 18 Too high CO and HC concentration when idling Probable cause Abnormal air-fuel ratio is suspected.DMalfunction of the air/fuel ratio control system DDeteriorated catalyst OK To the nextpage NG Replace the ignition coil. 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 iscranked.NG NG Measure fuel high -pressure between the fuelpump (high pressure) and injector. (Refer to P.13A-223.) Check the trouble symptoms. OK MUT- IIData list 11 Oxygen sensor (Refer to P.13A-198.) OK: Repeat 0 - 400 mV and 600 - 1,000 mV alternately during idling(wait for at least 2 minutes after the enginestarted to run at idle).OKReplace the oxygen sensor. OK MUT- IIData list 11 Oxygen sensor (Refer to P.13A-198.) OK: 600 - 1,000 mV when theengine is suddenlyracedNGCheck the oxygen sensor system. (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 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 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.) 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.) NO Check the ignition timing. (Refer to GROUP 11A - Engine Adjustment.)NGCheck that the crankanglesensor andtiming beltcover are properly installed. MUT- IISelf-Diag Code Are diagnosis codes displayed?YESRefer to P.13A-130, INSPECTION CHART FOR DIAGNOSIS CODES. www.WorkshopManuals.co.uk Purchased from www.WorkshopManuals.co.uk
GDI -Troubleshooting 13A-198 DATA LIST REFERENCE TABLE Caution When shifting the select lever to D range, the brakes should be applied so that the vehicle does not move forward. NOTE *1: Injector running time indicates the time where the power voltage is 11 V and the cranking speed is 250 r/min or less. As the engine speed increases and the time passes by, the injector running time decreases. *2: There may be occasions of taking the injector running time approximately 10% longer than usual when a vehicle has not been driven for a long time (mileage is no more than 500 km.) *3: It is normal that the idle switch turns from ON to OFF when accelerator pedal position sensor (1st channel) voltage increases by 200 - 600 mV from the idling position. Moreover, adjust the idle switch and accelerator pedal position sesor if the idle switch keeps turning after the accelerator pedal is depressed. Item No.Inspection itemInspection contentsNormal conditionInspection procedure No.Reference page 11Oxygen sensorEngine: After having warmed up (Air/fuel mixture is made leaner whenWhen at 4,000 r/min, engine is deceler- ated200 mV or lessCode No. 1113A-131 made leaner when decelerating, and is made richer when racing.) Race the engine sud- denly.600 - 1,000 mV Engine: After having warmed up (The oxygen sensor signal is used to check the air/fuelIdling (after six minutes)400 mV or less 600 - 1,000 mV (changes) check the air/fuel mixture ratio, and control condition by the engine- A/T-ECU.) 2,500 r/min 12Air flow sen-DEngine coolantIdling22 - 48 HzCode No.13A-133 sortemperature: 80 - 95 _C Lamps and all 2,500 r/min60 - 100 Hz 12 DLamps and all accessories: OFF DTransmission: P range RacingFrequency in- creases in re- sponse to racing 13Intake air temperatureIgnition switch: ON or with engine runningWhen intake air tem- perature is - 20_ C-20_ CCode No. 1313A-135 sensor When intake air tem- perature is 0_ C0_ C When intake air is 20_ C20_ C When intake air is 40_ C40_ C www.WorkshopManuals.co.uk Purchased from www.WorkshopManuals.co.uk
