GDI -Troubleshooting 13A-192 Inspection procedure 28 Accelerator pedal position switch system Probable cause The accelerator pedal positionswitch detects that the acceleratorpedal isfully closed, and sends a signal to the engine-A/T-ECU. The engine-A/T-ECU uses this signal to carry outidlespeed control.DMaladjustment of the accelerator pedal position switch and the acceleratorpedal positionsensor. DOpen circuit or short-circuited harness wire in the accelerator pedal positionswitch system, or poor connector contact DMalfunction of the engine-A/T-ECU OK Check the trouble symptoms.NGReplace the engine-A/T-ECU. OK Check the acceleratorpedal position switch. (Refer to P.13A-230.)NGReplace the accelerator pedal position sensor. OK Measure at accelerator pedal position sensor connector D-135. DDisconnect the connector, and measure at the harness side. DThe voltage between terminal 4 and earth (Ignition switch: ON) OK: 4 V or more DThe continuity between terminal 5 and earth OK: ContinuityNGCheck the following connector: D-121NG Repair OK Check the trouble symptoms. NG NG Check the harness wire between the engine-A/T-ECU and the accelerator pedal positionsensor.Repair OK Check the following connector: D-135NG Repair www.WorkshopManuals.co.uk Purchased from www.WorkshopManuals.co.uk
GDI -Troubleshooting 13A-193 Inspection procedure 29 Fuel pump (low pressure) system Probable cause The engine-A/T-ECU turns on the fuelpumprelay while theengine iscranking or running, and supplies power source to the fuelpump(low pressure).DMalfunction of the fuel pumprelay DMalfunction of the fuel pump(low pressure) DImproper connector contact,opencircuit or short-circuited harness wire DMalfunction of the engine-A/T-ECU Check the ignition switch (Refer to GROUP54 - Ignition Switch.) NG Repair OK OK NG OK Check the trouble symptoms.NGReplace the fuel pump(low pressure). NG Replace the engine-A/T-ECU.OKRepair OK Normal NG Repair NG Check the harness wire between the fuel pumprelay and the fuelpump (low pressure). NG (1) NG NG NG Check the harness wire between the fuel pump(low pressure) and earth, and repair if necessary. (2) NG NG NG NG Repair OK OK Check the following connector: G-12NG Repair Check the trouble symptoms. Check the following connector : F-11 OK Check the trouble symptoms. Check the following connectors: B-27X, D-124, E-17, F-11Measure at fuel pump(low pressure) connector G-12. DDisconnect the connector, and measure at the harness side. (1) The voltage between terminal 5 and earth (Ignition switch: ON) OK: System voltage (2) The continuity between terminal 4 and earth OK: Continuity Check the trouble symptoms. OK Measure at the engine-A/T-ECU connector D-119. DDisconnect the connector, and measure at the harness side. DShort circuit between terminal 21 and earth (Ignition switch: ON) OK: The fuel pump operates. (Its operation sound can be heard.)OKCheck the following connector : D-119 OK Measure at the engine-A/T-ECU connector D-119. DDisconnect the connector, and measure at the harness side. DThe voltage between terminal 21 and earth (Ignition switch: ON) OK: System voltageNGCheck the harness wire between the fuel pumprelay and the engine-A/T-ECU, and repair if necessary. Check the harness wire between the fuel pumprelay and the ignition switch. OK Check the trouble symptoms. Check the following connectors: D-208, D-213, E-10Measure at the fuel pumprelay connector B-27X. DDisconnect the connector, and measure at the harness side. DThe voltage between terminal 3, 4 and earth (Ignition switch: ON) OK: System voltage OK Check the fuelpumprelay (Refer to P.13A-227.)NG Replace MUT- IIActuator Test 07 Fuel pump (Refer to P.13A-203.) Repair www.WorkshopManuals.co.uk Purchased from www.WorkshopManuals.co.uk
GDI -Troubleshooting 13A-194 Inspection procedure 30 Power steering fluid pressure switch system Probable cause The presence or absence of power steeringload is input to the engine-A/T-ECU. Based on this signal, the engine-A/T-ECU controls the throttle control servo so that idlespeed increases when the power steering is in operation.DMalfunction of the power steering fluid pressure switch. DImproper connector contact,opencircuit or short-circuited harness wire DMalfunction of the engine-A/T-ECU OK Measure at power steering fluid pressure switch connector B-51. DDisconnect the connector, and measure at the harness side. DThe voltage between terminal 1 and earth (Ignition switch: ON) OK: System voltageNGCheck the following connector: D-120NG Repair OK Check the trouble symptoms. NG Check the harness wire between the engine-A/T-ECU and the power steering fluid pressure switch, and repair if necessary.OK Check the following connector: B-51NG Repair OK Check the trouble symptoms.NGReplace the engine-A/T-ECU. Check the power steering fluid pressure switch (Refer to GROUP 37A - On-vehicle Service.)NG Replace Inspection procedure 31 A/C switch and A/C relay system Probable cause When an A/C ON signal is input to the engine-A/T-ECU, the engine-A/T-ECU controls the throttle control servo so thatidlespeed increases, and also operates the A/C compressor magnetic clutch.DMalfunction of the A/C control system DMalfunction of the A/C switch DImproper connector contact,opencircuit or short-circuited harness wire DMalfunction of the engine-A/T-ECU Service the A/C compressor relay. (Refer to GROUP 55 - On-vehicle Service.)NG Replace OK Measure at engine-A/T-ECU connectors D-119, D-121. DDisconnect the connector, and measure at the harness side. DThe voltage between terminal 20, 83 and earth (Ignition switch: ON) OK: 0-3V (A/C switch: OFF) System voltage (A/C switch: ON) DConnect terminal 20 to earth. (Ignition switch: ON, A/C switch: ON) OK: A/C compressor clutch turns on.OKCheck the following connectors: D-119, D-121NG Repair OK Check the trouble symptoms. NG Replace the engine-A/T-ECU. NG Check the A/C system (Refer to GROUP 55 - Troubleshooting.) 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
GDI -Troubleshooting 13A-196 Inspection procedure 34 Injector driver Probable cause The engine-A/T-ECU drives the injector by the drive signal.DMalfunction of the injector driver DImproper connector contact,opencircuit or short-circuited harness wire DMalfunction of the engine-A/T-ECU OK NG Replace the engine-A/T-ECU. OK Check the trouble symptoms.Transient malfunction (Refer to GROUP 00 - Points to Note for Intermittent Malfunctions.) OK Use a analyzer to measure the signal waveform at the engine- A/T-ECU connectors D-119 and D-120. DEngine: idling DSelector lever position: P DVoltage between 96 and earth, and between 1 and earth OK: A normal waveform should be displayed as described on P.13A-214 (INSPECTIONPROCEDURE USING AN ANALYZER).NGReplace the injector driver. NGCheck the following connectors: B-121, D-119Repair NG Repair OK Check the harness wire between the injector driver and engine- A/T-ECU. Inspection procedure 35 EGR valve (stepper motor) system Probable cause The engine-A/T-ECU controls the EGR valve (stepper motor) in order to control the amount ofexhaust gas mixed in the intake air.DMalfunction of the EGR valve DOpen circuit or short-circuited harness wire in the EGR valve circuit DMalfunction of the engine-A/T-ECU OK Check the trouble symptoms.NGCheck the harness wire between the engine controlrelay and the EGR valve, and repair if necessary. OK Check the trouble symptoms.NGCheck the harness wire between the engine-A/T-ECU and EGR valve, and repair if necessary. OK Check the trouble symptoms.NGReplace the engine-A/T-ECU. OK Check the following connector: D-120NG Repair OK Measure at the engine-A/T-ECU con- nector D-120. DDisconnect the connector, and measure at the harness side. DVoltage between 51, 53, 60, 62 and earth (Ignition switch: ON) OK: System voltageNGCheck the following connector: B-60NG Repair OK Measure at the EGR valve connector B-60. DDisconnect the connector, and measure at the harness side. DVoltage between 2, 5 and earth (Ignition switch: ON) OK: System voltageNGCheck the following connector: B-25XNG Repair Check the EGR valve. (Refer to GROUP 17 - Emission Control System.)NG Replace www.WorkshopManuals.co.uk Purchased from www.WorkshopManuals.co.uk
GDI -Troubleshooting 13A-197 Inspection procedure 36 Purge control solenoid valve system Probable cause The engine-A/T-ECU controls the purge control solenoid valve in order to control the purge air coming from the canister.DMalfunction of the purge control solenoid valve DOpen circuit or short-circuited harness wire in the purge control solenoid valve circuit DMalfunction of the engine-A/T-ECU OK Check the trouble symptoms.NGCheck the harness wire between the engine-A/T-ECU and the purge control solenoid valve, and repair if necessary. OK Check the trouble symptoms.NGReplace the engine-A/T-ECU. OK Check the following connector: D-120NG Repair OK Measure at the engine-A/T-ECU con- nector D-120. DDisconnect the connector, and measure at the harness side. DVoltage between 5 and earth (Ignition switch: ON) OK: System voltageNGCheck the following connector: B-106NG Repair OK Measure at the purge control solenoid valve connector B-106. DDisconnect the connector, and measure at the harness side. DVoltage between 2 and earth (Ignition switch: ON) OK: System voltageNGCheck the harness wire between the engine controlrelay and the purge control solenoid valve, and repair if necessary. Check the purge control solenoid valve. (Refer to GROUP 17 - On-vehicle Ser- vice.)NG Replace 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
GDI -Troubleshooting 13A-206 Terminal No.Normal condition Check condition (Engine condition) Check item 49Engine control relayIgnition switch: OFF0-3V Ignition switch: ONSystem voltage 51EGR valve (A)Ignition switch: OFF to ON5-8V 53EGR valve (C) (Repeatedly changes for approx. 3 seconds) 60EGR valve (B) 62EGR valve (C) 52Power steering fluid pressure switchEngine: Idling after warming-upWhen steering wheel is stationarySystem voltage When steering wheel is turned0-3V 55Barometric pressureIgnition switch: ONAt an altitude of 0 m3.7 - 4.3 V sensor At an altitude of 1,200 m3.2 - 3.8 V 56Camshaft position sen-Engine: Cranking0.4 - 3.0 V sor Engine: Idling0.5 - 2.0 V 58Ignition switch-STEngine: Cranking8 V or more 61A/C switch 2Refer to GROUP 55 - Troubleshooting (Check at A/C-ECU or Engine-ECU Terminal). 63Injector open circuit check signalEngine: Increases from idling up to 4,000 r/minThe voltage decreases slightly (approx. 0.7 V) from 4.5 - 5.0 V. 64Intake air temperature sensorIgnition switch: ONWhen intake air tempera- ture is 0_C3.2 - 3.8 V When intake air tempera- ture is 20_C2.3 - 2.9 V When intake air tempera- ture is 40_C1.5 - 2.1 V When intake air tempera- ture is 80_C0.4 - 1.0 V 65Air flow sensorEngine: Idling2.2 - 3.2 V Engine speed: 2,500 r/min 66Backup power supplyIgnition switch: OFFSystem voltage 71Oxygen sensorEngine: Running at 2,500 r/min after warming-up (Check by using a digital voltmeter.)Voltages of 0 V and 0.8 V alternate www.WorkshopManuals.co.uk Purchased from www.WorkshopManuals.co.uk
