TROUBLE DIAGNOSIS. ECM Harness Connector Terminal Layout. ECM Terminals and Reference Value EC-107

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Jasmin Fowler
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1 ECM Harness Connector Terminal Layout UBS00K1I A EC C ECM Terminals and Reference Value PREPARATION 1. ECM is located behind the glove box. For this inspection, remove glove box. 2. Remove ECM harness connector. MBIB0045E UBS00K1J D E F G 3. When disconnecting ECM harness connector, loosen it with levers as far as they will go as shown in the figure. 4. Connect a break-out box (SST) and Y-cable adapter (SST) between the ECM and ECM harness connector. Use extreme care not to touch 2 pins at one time. Data is for comparison and may not be exact. BBIA0231E H I J K ECM INSPECTION TABLE Specification data are reference values and are measured between each terminal and ground. Pulse signal is measured by CONSULT-II. CAUTION: Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in damage to the ECMs transistor. Use a ground other than ECM terminals, such as the ground. 1 B ECM ground Body ground BBIA0282E L M 2 G/B A/F sensor 1 heater (bank 1) PBIB1584E EC-107

2 3 R Throttle control motor relay power supply 0-14V 4 O/L Throttle control motor (Close) Accelerator pedal: Released PBIB1104E 0-14V 5 W/L Throttle control motor (Open) Accelerator pedal: Fully depressed PBIB1105E 6 O/B Heated oxygen sensor 2 heater (bank 2) Engine speed: Below 3,600 rpm after the following conditions are met. Engine: After warming up Keeping the engine speed between 3,500 and 4,000 rpm for 1 minute and for 1 minute under no load V Engine speed: Above 3,600 rpm Engine speed: Above 950 rpm. 8 O Electronic controlled engine mount-1 For 2 seconds after engine speed is 950 rpm or less V 2 seconds after engine speed is 950 rpm or less V Engine speed: Below 950 rpm. 9 W/R Electronic controlled engine mount-2 For 2 seconds after engine speed is 950 rpm or more V 2 seconds after engine speed is 950 rpm or more V EC-108

3 A EC 10 V/W Intake valve timing control solenoid valve (bank 2) 7-12V C D 11 R/L Intake valve timing control solenoid valve (bank 1) 7-12V PBIB1790E E F G H PBIB1790E 12 W Power steering pressure sensor Steering wheel: Being turned Steering wheel: Not being turned V V Approximately 10V I J K 13 G Crankshaft position sensor (POS) Approximately 10V PBIB1041E L M PBIB1042E EC-109

4 V 14 W Camshaft position sensor (PHASE) (bank 2) V PBIB1039E PBIB1040E 15 W Knock sensor Approximately 2.5V 16 LG/B Approximately 3.1V 35 O/L Approximately 2.6V A/F sensor 1 (Bank 1) 56 BR/Y Approximately 2.3V 75 Y/R Approximately 2.3V G/Y Y/B P/L LG/R L/W R/Y R/B EGR volume control valve Fuel injector No. 5 Fuel injector No. 3 Fuel injector No V SEC984C SEC985C 24 V A/F sensor 1 heater (Bank 2) PBIB1584E EC-110

5 25 P/B 29 Y/V* 1 Y/B* 2 32 BR Heated oxygen sensor 2 heater (bank 1) VIAS control solenoid valve EVAP control system pressure sensor Engine speed: Below 3,600 rpm after the following conditions are met. Engine: After warming up Keeping the engine speed between 3,500 and 4,000 rpm for 1 minute and for 1 minute under no load. Engine speed: Above 3,600 rpm Engine speed: Between 1,800 and 3,600 rpm 0-1.0V 0-1.0V Approximately V A EC C D E F G V H I 33 W Camshaft position sensor (PHASE) (bank 1) V PBIB1039E J K PBIB1040E L 34 V/O Intake air temperature sensor Approximately 0-4.8V Output voltage varies with intake air temperature. M EC-111

6 V/R G/W R/W Fuel injector No. 6 Fuel injector No. 4 Fuel injector No. 2 SEC984C SEC985C Accelerator pedal: Not depressed even slightly, after engine starting 45 V/R EVAP canister purge volume control solenoid valve SEC990C Engine speed: About 2,000 rpm (More than 100 seconds after starting engine) SEC991C 47 G 48 G 49 BR/W (Throttle position sensor) (EVAP control system pressure sensor) (Refrigerant pressure sensor) 50 W Throttle position sensor 1 Accelerator pedal: Fully released Accelerator pedal: Fully depressed More than 0.36V Less than 4.75V EC-112

7 51 G/O Mass air flow sensor 54 V/W EGR temperature sensor 55 W Heated oxygen sensor 2 (bank 2) Engine speed: 2,500 rpm V V Less than 4.5V 0-1.5V EGR system: Operating Revving engine from idle to 3,000 rpm quickly after the following conditions are met Engine: After warming up Keeping the engine speed between 3,500 and 4,000 rpm for 1 minute and for 1 minute under no load 0 - Approximately 1.0V 57 P Approximately 2.6V 58 SB Approximately 2.3V A/F sensor 1 (Bank 2) 76 G/Y Approximately 3.1V 77 LG Approximately 2.3V P/W L/R BR/R Ignition signal No. 5 Ignition signal No. 3 Ignition signal No. 1 Engine speed: 2,500 rpm 0-0.3V V SEC986C A EC C D E F G H I J K L M SEC987C 66 B Sensor ground (Throttle position sensor) 67 B Sensor ground 68 L/Y (PSP sensor) EC-113

8 69 R Throttle position sensor 2 70 W Refrigerant pressure sensor 73 Y 74 L 78 B/W Engine coolant temperature sensor Heated oxygen sensor 2 (bank 1) Sensor ground (Heated oxygen sensor 2) Accelerator pedal: Fully released Accelerator pedal: Fully depressed Both A/C switch and blower switch: ON (Compressor operates.) Revving engine from idle to 3,000 rpm quickly after the following conditions are met Engine: After warming up Keeping the engine speed between 3,500 and 4,000 rpm for 1 minute and for 1 minute under no load Less than 4.75V More than 0.36V V Approximately 0-4.8V Output voltage varies with engine coolant temperature. 0 - Approximately 1.0V 0-0.3V GR/R GR G/R Ignition signal No. 6 Ignition signal No. 4 Ignition signal No V SEC986C Engine speed: 2,500 rpm SEC987C 82 GR 83 G Sensor ground (APP sensor 1) Sensor ground (APP sensor 2) 85 LG Data link connector CONSULT-II or GST: Disconnected - Battery voltage EC-114

9 86 P CAN communication line 90 LG/R 91 P (APP sensor 1) (APP sensor 2) 94 L CAN communication line 98 V Accelerator pedal position sensor 2 99 G/Y ASCD steering switch 101 P/L Stop lamp switch 102 G/W PNP switch 104 O Throttle control motor relay 106 W Accelerator pedal position sensor 1 Accelerator pedal: Fully released Accelerator pedal: Fully depressed ASCD steering switch: OFF MAIN switch: Pressed CANCEL switch: Pressed RESUME/ACCELERATE switch: Pressed SET/COAST switch: Pressed Brake pedal: Fully released Brake pedal: Slightly depressed Shift lever: P or N (A/T), Neutral (M/T) Except above position Approximately V Output voltage varies with the communication status Approximately V Output voltage varies with the communication status V More than 2.0V Approximately 4V Approximately 1V Approximately 3V Approximately 2V 0-1.0V Accelerator pedal: Fully released Accelerator pedal: Fully depressed 107 R/L Fuel tank temperature sensor V More than 4.3V Approximately 0-4.8V Output voltage varies with fuel tank temperature. A EC C D E F G H I J K L M EC-115

10 Power supply for ECM (Backup) 108 G/R ASCD brake switch 109 R/W Ignition switch 111 W/B ECM relay (Self shut-off) 113 B/O Fuel pump relay B B 117 R/Y R/G R/G 121 W/L ECM ground EVAP canister vent control valve Power supply for ECM Brake pedal: Slightly depressed (A/T) Clutch pedal and/or clutch pedal: Slightly depressed (M/T) Brake pedal: Fully released (A/T) Clutch pedal and brake pedal: Fully released (M/T) For a few seconds after turning ignition switch OFF More than a few seconds after turning ignition switch OFF For 1 second after turning ignition switch ON More than 1 second after turning ignition switch ON : Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.) *1: Models for A/T *2: Models for M/T 0V 0-1.5V 0-1.5V Body ground EC-116

ECU Pinout Chart 2002 WRX Engine Control Module (ECM) I/O Signals. Wire Ignition SW Color ON Engine ON (Idling)

ECU Connector Diagram ECU Pinout Chart 2002 WRX Engine Control Module (ECM) I/O Signals Signal (V) Content Pin Wire Ignition SW Color ON Engine ON (Idling) Note (Engine OFF) Crankshaft Signal (+) B2 W