Terminals Of ECM: Notes
HINT:
The standard normal voltage between each pair of ECM terminals is shown in the table below. The appropriate conditions for checking each pair of terminals is also indicated.
The result of checks should be compared with the standard normal voltage for that pair of terminals, displayed in the STD Voltage column.
The illustration above can be used as a reference to identify the ECM terminal locations.
ECM TERMINALS VOLTAGE SPECIFICATIONS
| Symbols (Terminals No.) | Wiring Colors | Terminal Descriptions | Conditions | STD Voltages | ||
|---|---|---|---|---|---|---|
| BATT (E6-3) - E1 (E3-5) | R-W-BR | Battery (for measuring battery voltage and for ECM memory) | Always | Between 9V and 14V | ||
| +BM (E5-6) - E1 (E3-5) | B-R-BR | Power source of throttle motor | Always | Between 9V and 14V | ||
| IGSW (E6-9) - E1 (E3-5) | B-O-BR | Ignition switch | Ignition switch ON | Between 9V and 14V | ||
| +B (E6-1) - E1 (E3-5) | B-BR | Power source of ECM | Ignition switch ON | Between 9V and 14V | ||
| MREL (E6-8) - E1 (E3-5) | B-W-BR | EFI relay | Ignition switch ON | Between 9V and 14V | ||
| VC (E3-18) - E2 (E3-28) | Y-BR | Power source of sensor (specific voltage) | Ignition switch ON | Between 4.5V and 5.5V | ||
| VTA1 (E3-21) - E2 (E3-28) | LG-BR | Throttle position sensor (for engine control) | Ignition switch ON, Accelerator pedal fully released | Between 0.5V and 1.1V | ||
| VTA1 (E3-21) - E2 (E3-28) | LG - BR | Throttle position sensor (for engine control) | Ignition switch ON, Accelerator pedal fully depressed | Between 3.3V and 4.9V | ||
| VTA2 (E3-31) - E2 (E3-28) | LG - BR | Throttle position sensor (for sensor malfunction detection) | Ignition switch ON, Accelerator pedal fully released | Between 2.1V and 3.1V | ||
| VTA2 (E3-31) - E2 (E3-28) | LG - BR | Throttle position sensor (for sensor malfunction detection) | Ignition switch ON, Accelerator pedal fully depressed | Between 4.5V and 5.5V | ||
| VPA (E6-22) - EPA (E6-28) | G - Y | Accelerator pedal position sensor (for engine control) | Ignition switch ON, Accelerator pedal fully released | Between 0.5V and 1.1V | ||
| VPA (E6-22) - EPA (E6-28) | G - Y | Accelerator pedal position sensor (for engine control) | Ignition switch ON, Accelerator pedal fully depressed | Between 2.6V and 4.5V | ||
| VPA2 (E6-23) - EPA2 (E6-29) | W - Y | Accelerator pedal position sensor (for sensor malfunction detection) | Ignition switch ON, Accelerator pedal fully released | Between 1.2V and 2.0V | ||
| Symbols (Terminals No.) | Wiring Colors | Terminal Descriptions | Conditions | STD Voltages | ||
| VPA2 (E6-23) - EPA2 (E6-29) | W-Y | Accelerator pedal position sensor (for sensor malfunction detection) | Ignition switch ON, Accelerator pedal fully depressed | Between 3.4V and 5.3V | ||
| VCPA (E6-26) - EPA (E6-28) | B-Y | Power source of accelerator pedal position sensor (for VPA) | Ignition switch ON | Between 4.5V and 5.5V | ||
| VCP2 (E6-27) - EPA2 (E6-29) | B-Y | Power source of accelerator pedal position sensor (forVPA2) | Ignition switch ON | Between 4.5V and 5.5V | ||
| VG (E3-30) - EVG (E3-29) | G-L-W | Mass air flow meter | Idling, Shift position P or N, A/C switch OFF | Between 0.5V and 3.0V | ||
| THA (E3-20) - E2 (E3-28) | Y-B-BR | Intake air temperature sensor | Idling, Intake air temperature 20°C (68° F) | Between 0.5V and 3.4V | ||
| THW (E3-19)-E2 (E3-28) | W-BR | Engine coolant temperature sensor | Idling, Engine coolant temperature 80°C (176°F) | Between 0.2V and 1.0V | ||
| #10 (E3-1)-E01 (E3-7) #20 (E3-2) - E01 (E3-7) #30 (E3-3) - E01 (E3-7) #40 (E3-4) - E01 (E3-7) | Y - W - B B - W - B W - W - B L - W - B | Injector | Ignition switch ON | Between 9V and 14V | ||
| #10 (E3-1)-E01 (E3-7) #20 (E3-2) - E01 (E3-7) #30 (E3-3) - E01 (E3-7) #40 (E3-4)-E01 (E3-7) | Y - W - B B - W - B W - W - B L - W - B | Injector | Idling | Pulse generation (see WAVEFORM 1 ) | ||
| CIGT1 (E3-8) - E1 (E3-5) IGT2 (E3-9) - E1 (E3-5) IGT3 (E3-10)-E1 (E3-5) IGT4 (E3-11)-E1 (E3-5) | R-L-BR Y-G - BR GR-BR W-BR | Ignition coil with igniter (ignition signal) | Idling | Pulse generation (see WAVEFORM 2 ) | ||
| IGF1 (E3-24)-E1 (E3-5) | L-Y - BR | Ignition coil with igniter (ignition confirmation signal) | Ignition switch ON | Between 4.5V and 5.5V | ||
| IGF1 (E3-24)-E1 (E3-5) | L-Y-BR | Ignition coil with igniter (ignition confirmation signal) | Idling | Pulse generation (see WAVEFORM 2 ) | ||
| G2+ (E4-24) - NE- (E4-33) | B-W | Camshaft position sensor | Idling | Pulse generation (see WAVEFORM 3 ) | ||
| NE+ (E4-25) - NE- (E4-33) | B-W | Crankshaft position sensor | Idling | Pulse generation (see WAVEFORM 3 ) | ||
| FC (E6-10)-E1 (E3-5) | G-R - BR | Fuel pump control | Ignition switch ON | Between 9V and 14V | ||
| FC (E6-10)-E1 (E3-5) | G-R-BR | Fuel pump control | Idling | Below 1.5V | ||
| M+ (E4-4)-ME01 (E4-2) | B-W-B | Throttle actuator | Idling with warm engine | Pulse generation (see WAVEFORM 4 ) | ||
| M- (E4-3)-ME01 (E4-2) | W-W-B | Throttle actuator | Idling with warm engine | Pulse generation (see WAVEFORM 5 ) | ||
| A1A+ (E4-23)-E1 (E3-5) | B-BR | A/F sensor | Always (Ignition switch ON) | 3.3V (1) | ||
| A1A - (E4-31)-E1 (E3-5) | W-BR | A/F sensor | Always (Ignition switch ON) | 3.0 V (1) | ||
| OX1 B (E4-29) - E2 (E3-28) | W-BR | Heated oxygen sensor | Engine speed maintained 2,500 RPM for 2 minutes after warming up sensor | Pulse generation (see WAVEFORM 6 ) | ||
| HA1A (E4-5) - E04 (E4-7) | P - W - B | A/F sensor heater | Idling | Below 3.0V | ||
| HA1A (E4-5) - E04 (E4-7) | P-W - B | A/F sensor heater | Ignition switch ON | Between 9V and 14V | ||
| HT1B (E4-21) - E03 (E4-6) | P - B - W - B | Heated oxygen sensor heater | Idling | Below 3.0V | ||
| HT1B (E4-21) - E03 (E4-6) | P - B - W - B | Heated oxygen sensor heater | Ignition switch ON | Between 9V and 14V | ||
| Symbols (Terminals No.) | Wiring Colors | Terminal Descriptions | Conditions | STD Voltages | ||
| KNK1 (E4 - 1) - EKNK (E4-28) | B - W | Knock sensor | Maintain engine speed 4,000 RPM after warming up engine | Pulse generation (see WAVEFORM 7 ) | ||
| OC1 + (E3 - 13) - OC1 - (E3 - 12) | Y - B - Y | Camshaft timing oil control valve (OCV) | Idling | Pulse generation (see WAVEFORM 8 ) | ||
| PRG (E3 - 34) - E01 (E3 - 7) | L - B - W - B | EVAP VSV | Ignition switch ON | Between 9V and 14V | ||
| PRG (E3 - 34) - E01 (E3 - 7) | L - B - W - B | EVAP VSV | Idling | Pulse generation (see WAVEFORM 9 ) | ||
| VPMP (E3 - 27)-E1 (E3 - 5) | R - BR | Vent valve (built into pump module) | Ignition switch ON | Between 9V and 14V | ||
| MPMP (E6 - 4) - E1 (E3 - 5) | GR - BR | Vacuum pump (built into pump module) | Vacuum pump OFF --> Vacuum pump ON | Between 0V and 3V Between 9V and 14V | ||
| PPMP (E6 - 21) - E2 (E3 - 28) | L - BR | Pressure sensor (built into pump module) | Ignition switch ON | Between 3V and 3.6V | ||
| STA (E3 - 17) -E1 (E3 - 5) | B - BR | Starter signal | Shift position N, Ignition switch START | 5.5V or more | ||
| STP (E5 - 19) - E1 (E3 - 5) | G - W - BR | Stop lamp switch | Brake pedal depressed | Between 7.5V and 14V | ||
| STP (E5 - 19) - E1 (E3 - 5) | G - W - BR | Stop lamp switch | Brake pedal released | Below 1.5V | ||
| ST1 - (E5 - 12) - E1 (E3 - 5) | G - O - BR | Stop lamp switch | Ignition switch ON, Brake pedal depressed | Below 1.5V | ||
| ST1- (E5 - 12) - E1 (E3 - 5) | G - O - BR | Stop lamp switch | Ignition switch ON, Brake pedal released | Between 7.5V and 14V | ||
| W (E6 - 11) - E01 (E3 - 7) | R - Y - W - B | MIL | Idling | Between 9V and 14V | ||
| W (E6 - 11) - E01 (E3 - 7) | R - Y - W - B | MIL | Ignition switch ON | Below 3.5V | ||
| ELS1 (E6 - 12) - E1 (E3 - 5) | G - BR | Electric load | Taillamp switch ON | Between 7.5V and 14V | ||
| ELS1 (E6 - 12) - E1 (E3 - 5) | G - BR | Electric load | Taillamp switch OFF | Between 0V and 1.5V | ||
| ELS2 (E6 - 13)-E1 (E3 - 5) | W - BR | Electric load | Defogger switch ON | Between 7.5V and 14V | ||
| ELS2 (E6 - 13) - E1 (E3 - 5) | W - BR | Electric load | Defogger switch OFF | Between 0V and 1.5 V | ||
| TACH (E6 - 5) - E1 (E3 - 5) | B - BR | Engine speed | Idling | Pulse generation (see WAVEFORM 10 ) | ||
| SPD (E5 - 17) - E1 (E3 - 5) | V - W - BR | Speed signal from combination meter | Driving at 1 2 mph (20 km/h) | Pulse generation (see WAVEFORM 11 ) | ||
| TC (E6-20) - E1 (E3 - 5) | P - B - BR | Terminal TC of DLC 3 | Ignition switch ON | Between 9V and 14V | ||
| SIL (E6 - 18) - E1 (E3 - 5) | L - R - BR | Terminal SIL of DLC3 | Connect hand-held tester or OBD II scan tool to DLC3 | Pulse generation (see WAVEFORM 12 ) | ||
| PSW (E4-8) - E1 (E3 - 5) | L - R - BR | Power steering oil pressure switch | While turning steering wheel | Below 1.5V | ||
| F/PS (E6 - 14) - E1 (E3 - 5) | Y - BR | Airbag sensor assembly | Idling with warm engine | Pulse generation (see WAVEFORM 13 ) | ||
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