GDI -Troubleshooting 13A-128 FAIL-SAFE FUNCTION REFERENCE TABLE When the main sensor malfunctions are detected by the diagnosis function, the vehicle is controlled by means of the pre-set control logic to maintain safe conditions for driving. Malfunctioning itemControl contents during malfunction Air flow sensor1. Suspends lean burn operation. 2. Uses the throttle position sensor signal and engine speed signal (crank angle sensor signal) to take reading of the basic injector drive time and basic ignition timing from the pre - set mapping. Intake air temperature sensorControls as if the intake air temperature is 25_ C. Throttle position sensor (2nd channel)1. Suspends lean burn operation. 2. Controls the throttle opening angle feedback (half as much as the opening rate in the normal condition) by using signals from the throttle position sensor (1st channel). However, this controlling system is not applied if the throttle position sensor (1st channel) and throttle position sensor (2nd channel) combination output voltage is outside 4 - 6 V. 3. Refrains from controlling the throttle opening angle feedback if the throttle position sensor (1st channel) is also defective. Engine coolant temperature sensorControls as if the engine coolant temperature is 80_ C. (Moreover, the control system is working until the ignition switch is turned OFF if the sensor signal returns to normal.) Camshaft position sensorCuts the fuel supply once a malfunction is detected. (Only when there has been no occasion of detecting No.1 cylinder top dead centre after the ignition switch is turned ON.) Vehicle speed sensor1. Suspends lean burn operation. However, the control is cancelled as a certain time passes by with the engine speed of 1,500 r/min or more. 2. Suspends lean burn operation during the engine idling. Barometric pressure sensorControls as if the barometric pressure is 101 kPa. Detonation sensorFixes the ignition timing as that for regular gasoline. Injector1. Suspends lean burn operation. 2. Suspends the exhaust gas recirculation. Ignition coil (incorporating pow- er transistor)1. Suspends lean burn operation. 2. Cuts off the fuel supply to cylinders with an abnormal ignition signal. Fuel pressure sensor1. Controls as if the fuel pressure is 5MPa. 2. Suspends fuel injection. (when the low pressure is detected and the engine speed is more than 3,000r/min) Alternator FR terminalRefrains from controlling to suppress the alternator output to electrical load. (Operated as a normal alternator) Accelerator pedal position sen- sor (2nd channel)1. Suspends lean burn operation. 2. Controls the throttle valve position by using signals from the accelerator pedal position sensor (1st channel). (However, the control system is not applicable if the difference from the accelerator pedal position sensor (1st channel) output voltage is 1.0V or higher.) 3 . Suspends the electronic controlled throttle valve system if accelerator pedal position sensor (1st channel) is also defective. www.WorkshopManuals.co.uk Purchased from www.WorkshopManuals.co.uk
GDI -Troubleshooting 13A-130 INSPECTION CHART FOR DIAGNOSIS CODES Code No.Diagnosis itemReference page 11Oxygen sensor system13A-131 12Air flow sensor system13A-133 13Intake air temperature sensor system13A-135 14Throttle position sensor (2nd channel) system13A-137 21Engine coolant temperature sensor system13A-138 22Crank angle sensor system13A-140 23Camshaft position sensor system13A-142 24Vehicle speed sensor system13A-144 25Barometric pressure sensor system13A-145 31Detonation sensor system13A-146 41Injector system13A-147 44Ignition coil (incorporating power transistor) system (for No. 1 and No. 4 cylinders)13A-148 52Ignition coil (incorporating power transistor) system (for No. 2 and No. 5 cylinders)13A-148 53Ignition coil (incorporating power transistor) system (for No. 3 and No. 6 cylinders)13A-148 54Immobilizer system13A-150 56Abnormal fuel pressure system13A-151 64Alternator FR terminal system13A-153 77Accelerator pedal position sensor (2nd channel) system13A-154 78Accelerator pedal position sensor (1st channel) system13A-156 79Throttle position sensor (1st channel) system13A-158 89Abnormality in fuel pressure system13A-160 91Electronic-controlled throttle valve system13A-161 92Throttle valve position feedback system13A-162 93Throttle valve control servo system13A-163 94Communication line system with throttle valve controller13A-164 96Throttle valve controller system13A-165 NOTE Code No. 56 may be also output when air is sucked in high-pressure fuel line due to no fuel supply. www.WorkshopManuals.co.uk Purchased from www.WorkshopManuals.co.uk
GDI -Troubleshooting 13A-131 INSPECTION PROCEDURE CLASSIFIED BY DIAGNOSIS CODE Code No.11 Oxygen sensor systemProbable cause Range of Check DThree minutes havebeenpassed since theengine has been started. DThe engine coolant temperature is approx. 80_C or more. DIntake air temperature is 20 - 30_C DEngine speed is 1,200 r/min or more DDriving on a level surface at constant speed. Set Conditions DThe oxygen sensor output voltage is 4.5 V or more when the sensor output voltage is 0.2 V or less and a voltage of 5 V isapplied to theoxygen sensor inside the engine-A/T-ECU.DMalfunction of oxygen sensor DOpen or short circuit in the oxygen sensor circuit or loose connector contact DMalfunction of engine-A/T-ECU www.WorkshopManuals.co.uk Purchased from www.WorkshopManuals.co.uk
GDI -Troubleshooting 13A-138 OK Measure at throttle valve controller connector D-121. DMeasure voltage at the throttle valve controller connector terminals. DIgnition switch: ON DVoltage between terminal 7 and earth OK: Acceleratorpedalfully re- leased: 0.4 - 0.8 V Acceleratorpedalfully de- pressed: 4.2 - 4.8 VNGCheck the following connector: D-121NG Repair OK Check the harness wire between the the throttle position sensor (2nd channel) and the throttle valve controller, and repair if necessary. OK Check the following connector: D-121 OK Check the trouble symptoms. NG Replace the engine-A/T-ECU. From the previouspage NG Repair OK Measure at throttle position sensor connector B-102. DUse test harness (MB991536) to connect the connector, and measure at the pick-up harness. DIgnition switch: ON (1) Voltage between terminal 1 and earth OK: 4.8 - 5.2 V (2) Voltage between terminal 3 and earth OK: 0.5 V or less (3) Voltage between terminal 4 and earth OK: Acceleratorpedalfully re- leased: 4.0 V or more Acceleratorpedalfully de- pressed: 0.4 - 0.6 V(1) NGCheck the following connector: D-11NG Repair (2) NG OK Check the harness wire between the the throttle position sensor (2nd channel) and the throttle valve controller, and repair if necessary. (3) NG Adjust the throttle position sensor. (Refer to P.13A-220.) Check the following connector: D-121NG Repair OK Check the harness wire between the the throttle position sensor (2nd channel) and the throttle valve controller, and repair if necessary. Code No.21 Engine coolant temperature sensor systemProbable cause Range of Check DEngine: Two seconds after theengine has beenstarted Set Conditions DThe sensor output voltage is 4.6 V or more for four seconds (equivalent to -45_C of engine coolant temperature) or DThe sensor output voltage is 0.1 V or less for four seconds (equivalent to 140_C of engine coolant temperature)DMalfunction of engine coolant temperaturesensor DOpen or short circuit in theengine coolant temperature sensor circuit or loose connector contact DMalfunction of engine-A/T-ECU Range of Check DEngine: After starting Set Conditions DThe engine coolant temperature has reduced fromover 40_C to less than 40_C, and that condition has lasted for five minutes or more. www.WorkshopManuals.co.uk Purchased from www.WorkshopManuals.co.uk
GDI -Troubleshooting 13A-139 OK Check the harness wire between the engine coolant temperaturesensor and the engine-A/T-ECU. MUT- IIData list 21 Engine coolant temperature sensor OK: When the engine iscold, the temperature is roughly the same asambient tem- perature. If warm, it is 80 - 120_C.OKTransient malfunction (Refer to GROUP 00 - Points to Note for Intermittent Malfunctions.) NG NG Replace OK Measure at engine coolant temperature sensor connector B-56. DDisconnect the connector and measure at the harness side. (1) Voltage between terminal 1 and earth (Ignition switch: ON) OK: 4.8 - 5.2 V (2) Resistance between terminal 2 and earth OK: 2Wor less(1) NGMeasure at engine-ECU connector D-120. DMeasure the voltage at the engine-A/T-ECU terminal. DDisconnect connector B-56. DIgnition switch: ON DVoltage between terminal 44 and earth OK: 4.8 - 5.2 VOKCheck the following connector: D-120 NG Repair NG NG Repair OK Check the trouble symptoms.NGReplace the engine-A/T-ECU. OK Check the following connector: B-56NG Repair (2) NG OKRepair OK Check the harness wire between the engine coolant temperaturesensor and the engine-A/T-ECU.NG Repair NG Check the harness wire between the engine coolant temperaturesensor and the engine-A/T-ECU.NG Repair OK Check the trouble symptoms.NGReplace the engine-A/T-ECU. OK To the nextpage Measure at engine coolant temperature sensor connector B-56. DDisconnect the connector and measure at the harness side. DResistance between terminals 1 and 2 OK: At 20_C of engine coolant temperature: 2.1 - 2.7 kW At 80_C of engine coolant temperature: 0.26 - 0.36 kW Check the following connector: D-120 Check the following connector: D-121 www.WorkshopManuals.co.uk Purchased from www.WorkshopManuals.co.uk
GDI -Troubleshooting 13A-140 OK Measure at engine coolant temperature sensor connector B-56. DUse test harness (MB991658) to connect the connector, and measure at the pick-up harness. DIgnition switch: ON DVoltage between terminal 1 and earth OK: At 0_C of engine coolant temperature: 3.2 - 3.8 V At 20_C of engine coolant temperature: 2.3 - 2.9 V At 40_C of engine coolant temperature: 1.3 - 1.9 V At 80_C of engine coolant temperature: 0.3 - 0.9 VNGCheck theengine coolant temperature sensor. (Refer to P.13A-227.)NG Repair OK Check the harness wire between the engine coolant temperaturesensor and the engine-A/T-ECU, and repair if necessary. OK Check the trouble symptoms.NGReplace the engine-A/T-ECU. OK Check the following connectors: D-120, D-121NG Repair From the previouspage Code No.22 Crank angle sensor systemProbable cause Range of Check DEngine is cranking Set Conditions DSensor output voltage does not change for 4 seconds (no pulse signal input).DMalfunction of the crankanglesensor. DOpen or short circuit in the crankanglesensor circuit or loose connector contact. DMalfunction of engine-A/T-ECU www.WorkshopManuals.co.uk Purchased from www.WorkshopManuals.co.uk
GDI -Troubleshooting 13A-160 Code No.89 Abnormal fuel systemProbable cause Range of Check DEngine: Being learning the air - fuel ratio Set Conditions DTen seconds or more havebeenpassed while the fuel injection amount compensation value is too low. or DTen seconds or more havebeenpassed while the fuel injection amount compensation value is too high.DMalfunction of fuel supply system DMalfunction of oxygen sensor DMalfunction of intake air temperature sensor DMalfunction of barometric pressure sensor DMalfunction of air flow sensor DMalfunction of engine-A/T-ECU Repair OK MUT- IIData list 74 Fuel pressure sensor (Refer to 13A-198, DATA LIST REFERENCE TABLE.)NGCheck fuel leakage around the fuel pump (high-pressure) line.NG NO Check the air intake from the intake hose and right bank intake manifold.NG Repair OK Check the oxygen sensor (Refer to P.13A-230.)NG Replace MUT- IISelf-Diag Code Is any diagnosis code other than No.89 output?YESRefer to P.13A-130, INSPECTION CHART FOR DIAGNOSIS CODES. OK Check the exhaust gas leaks from the right bank exhaust manifold.NG Cleaning OK Check the throttle body (around the throttle valve), and clean if necessary. (Refer to P.13A-220).NG Cleaning OK MUT- IIData list 11 Oxygen sensor 12 Air flow sensor 13 Intake air temperature sensor 21 Engine coolant temperature sensor 25 Barometric pressure sensor (Refer to 13A-198, DATA LIST REFERENCE TABLE.) Reference If all the service data is normal, go to “OK.” If any abnormal service is found, go to “NG.”NGRefer to the Inspection procedure for the sensor, which is indicated by the abnormal service data. (Refer to P.13A-130, INSPECTION CHART FOR DIAGNOSIS CODES.)OK Replace the fuel pump (high-pressure). Check the purge control solenoid valve (Refer to GROUP 17 - Emission Control).NG Replace OK To the nextpage www.WorkshopManuals.co.uk Purchased from www.WorkshopManuals.co.uk
GDI -Troubleshooting 13A-171 Inspection procedure 5 No initial combustion (starting impossible) Probable cause In cases such as the above, the cause is probably that a sparkplug is defective, or that the supply of fuel to the combustion chamber is defective. In addition, foreign materials (water, kerosene, etc.) may be mixed with the fuel.DMalfunction of the fuel supply system DMalfunction of the ignition system DMalfunction of the engine-A/T-ECU NGRepair OK MUT- IIData list 22 Crankanglesensor (Refer to P.13A-198.)NGCheck the crankanglesensor system. (Refer to P.13A-140, code No.22.) YES MUT- IIActuator Test 07 Fuel pump(low pressure) (Refer to P.13A-203.)NGCheck fuelpump(low pressure) system (Refer to P.13A-193, Inspection procedure 29.) OK Does the camshaft rotate when theengine is cranking?NOCheck if thetiming belt isbroken ordamaged. NO MUT- IIData list 16 Battery voltage (Refer to P.13A-198.)NGCheck theengine controlrelay and ignition switch-IG system (Refer to P.13A-190, Inspection procedure 25.) OK MUT- IISelf-Diag Code Is a diagnosis code set?YESRefer to P.13A-130, INSPECTION CHART FOR DIAGNOSIS CODES Check battery voltage when cranking. OK: 8 V or higherNGCheck the battery. OK Is starting good if the engine iscranked with the accelerator pedalslightly depressed?YESDClean the throttle valve area. (Refer to P.13A-220.) DCheck and adjust the throttle position sensor (Refer to P.13A-220.) OK MUT- IIData list 79 Throttle position sensor (1st channel) (Refer to P.13A-198.)NGCheck the throttle position sensor (1st channel) system (Refer to P.13A-158, code No.79.) 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 Measure low fuel pressure between the fuelpump(low pressure) and fuelpump (highpressure) (Refer to P.13A-222.)NGRepair OK To the nextpage NO Adjust the throttle position sensor (Refer to P.13A-220.) NG Measure at injector driver connector B-19 DDisconnect the connector, and measure at the harness side. DThe voltage between terminals 4, 12, 21 and earth (Ignition switch: ON) OK Battery voltage Check fuel leakage (Refer to P.13A-225.)OK Check the injector driver system. (Refer to P.13A-196, Inspection procedure 34.) NG www.WorkshopManuals.co.uk Purchased from www.WorkshopManuals.co.uk
