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 are also indicated. The result of checks should be compared with the standard normal voltage for that pair of terminals, displayed in the Specified Condition column. The illustration above can be used as a reference to identify the ECM terminal locations.
TERMINAL DESCRIPTION AND SPECIFIED CONDITIONS
| Symbols (Terminal No.) | Wiring Colors | Terminal Descriptions | Conditions | Specified Conditions |
|---|---|---|---|---|
| BATT (A9-20) - E1 (B30-104) | W - BR | Battery (for measuring battery voltage and for ECM memory) | Always | 9 to 14 V |
| +BM (A9-3) - E1 (B30-104) | LG - BR | Power source of throttle actuator | Always | 9 to 14 V |
| IGSW (A9-28) - E1 (B30-104) | B - BR | Ignition switch | Ignition switch ON | 9 to 14 V |
| +B (A9-2) - E1 (B30-104) | B - BR | Power source of ECM | Ignition switch ON | 9 to 14 V |
| +B2 (A9-1) - E1 (B30-104) | B - BR | Power source of ECM | Ignition switch ON | 9 to 14 V |
| OC1+ (B30-100) - OC1- (B30-123) | BR - L | Camshaft timing oil control valve (OCV) | Idling | Pulse generation WAVEFORM 1 |
| MREL (A9-44) - E1 (B30-104) | O - BR | EFI relay | Ignition switch ON | 9 to 14 V |
| VG (B30-118) - E2G (B30-116) | R - LG | Mass air flow meter | Idling, Shift lever position P or N, A/C switch OFF | 0.5 to 3.0 V |
| THA (B30-65) - ETHA (B30-88) | W - BR | Intake air temperature sensor | Idling, Intake air temperature 20°C (68°F) | 0.5 to 3.4 V |
| THW (B30-97) - ETHW (B30-96) | GR - BR | Engine coolant temperature sensor | Idling, Engine coolant temperature 80°C (176°F) | 0.2 to 1.0 V |
| VCTA (B30-67) - ETA (B30-91) | Y - BR | Power source of throttle position sensor (specific voltage) | Ignition switch ON | 4.5 to 5.5 V |
| VTA1 (B30-115) - ETA (B30-91) | G - BR | Throttle position sensor (for engine control) | Ignition switch ON, Throttle valve fully closed | 0.5 to 1.1 V |
| Ignition switch ON, Throttle valve fully open | 3.3 to 4.9 V | |||
| VTA2 (B30-114) - ETA (B30-91) | L - BR | Throttle position sensor (for sensor malfunction detection) | Ignition switch ON, Throttle valve fully closed | 2.1 to 3.1 V |
| Ignition switch ON, Throttle valve fully open | 4.6 to 5.0 V | |||
| VPA (A9-55) - EPA (A9-59) | W - Y | Accelerator pedal position sensor (for engine control) | Ignition switch ON, Accelerator pedal released | 0.5 to 1.1 V |
| Ignition switch ON, Accelerator pedal fully depressed | 2.6 to 4.5 V | |||
| VPA2 (A9-56) - EPA2 (A9-60) | R - O | Accelerator pedal position sensor (for sensor malfunctioning detection) | Ignition switch ON, Accelerator pedal released | 1.2 to 2.0 V |
| Ignition switch ON, Accelerator pedal fully depressed | 3.4 to 5.0 V | |||
| VCPA (A9-57) - EPA (A9-59) | B - Y | Power source of accelerator pedal position sensor (for VPA) | Ignition switch ON | 4.5 to 5.5 V |
| VCP2 (A9-58) - EPA2 (A9-60) | L - O | Power source of accelerator pedal position sensor (for VPA2) | Ignition switch ON | 4.5 to 5.5 V |
| HA1A (B30-109) - E04 (B30-46) | L - W-B | A/F sensor heater | Idling | Below 3.0 V |
| Ignition switch ON | 9 to 14 V | |||
| A1A+ (B30-112) - E1 (B30-104) | B - BR | A/F sensor | Ignition switch ON | 3.3 V* |
| A1A- (B30-113) - E1 (B30-104) | R - BR | A/F sensor | Ignition switch ON | 3.0 V* |
| HT1B (B30-47) - E03 (B30-86) | R - W-B | Heated oxygen sensor heater | Idling | Below 3.0 V |
| Ignition switch ON | 9 to 14 V | |||
| OX1B (B30-64) - EX1B (B30-87) | B - BR | Heated oxygen sensor | Engine speed maintained at 2,500 rpm for 2 minutes after warming up sensor | Pulse generation WAVEFORM 2 |
| #10 (B30-108) - E01 (B30-45) | L - W-B | Injector | Ignition switch ON | 9 to 14 V |
| #20 (B30-107) - E01 (B30-45) | G - W-B | Idling | Pulse generation WAVEFORM 3 |
|
| #30 (B30-106) - E01 (B30-45) | B - W-B | |||
| #40 (B30-105) - E01 (B30-45) | W - W-B | |||
| KNK1 (B30-110) - EKNK (B30-111) | B - W | Knock sensor | Engine speed maintained at 4,000 after warming up engine | Pulse generation WAVEFORM 4 |
| G2+ (B30-99) - G2- (B30-98) | L - Y | Camshaft position sensor | Idling | Pulse generation WAVEFORM 5 |
| NE+ (B30-122) - NE- (B30-121) | W - B | Crankshaft position sensor | Idling | Pulse generation WAVEFORM 5 |
| IGT1 (B30-85) - E1 (B30-104) | R - BR | Ignition coil (ignition signal) | Idling | Pulse generation WAVEFORM 6 |
| IGT2 (B30-84) - E1 (B30-104) | P - BR | |||
| IGT3 (B30-83) - E1 (B30-104) | G - BR | |||
| IGT4 (B30-82) - E1 (B30-104) | L - BR | |||
| IGF1 (B30-81) - E1 (B30-104) | W - BR | Ignition coil (ignition confirmation signal) | Ignition switch ON | 4.5 to 5.5 V |
| Idling | Pulse generation WAVEFORM 6 |
|||
| PRG (B30-49) - E1 (B30-104) | G - BR | Purge VSV | Ignition switch ON | 9 to 14 V |
| Idling | Pulse generation WAVEFORM 7 |
|||
| SPD (A9-8) - E1 (B30-104) | V - BR | Speed signal from combination meter | Driving at 20 km/h (12 mph) | Pulse generation WAVEFORM 8 |
| STA (A9-48) - E1 (B30-104) | LG - BR | Starter signal | Cranking | 5.5 V or more |
| STAR (B30-52) - E1 (B30-104) | W - BR | Starter relay control | Ignition switch ON | Below 1.5 V |
| Cranking | 6.0 V or more | |||
| STP (A9-36) - E1 (B30-104) | L - BR | Stop light switch | Brake pedal depressed | 7.5 to 14 V |
| Brake pedal released | Below 1.5 V | |||
| ST1- (A9-35) - E1 (B30-104) | GR - BR | Stop light switch (opposite to STP terminal) | Ignition switch ON, Brake pedal depressed | Below 1.5 V |
| Ignition switch ON, Brake pedal released | 7.5 to 14 V | |||
| M+ (B30-42) - ME01 (B30-43) | B - W-B | Throttle actuator | Idling with warm engine | Pulse generation WAVEFORM 9 |
| M- (B30-41) - ME01 (B30-43) | W - W-B | Throttle actuator | Idling with warm engine | Pulse generation WAVEFORM 10 |
| FC (A9-7) - E1 (B30-104) | W - BR | Fuel pump control | Ignition switch ON | 9 to 14 V |
| Idling | Below 1.5 V | |||
| W (A9-24) - E1 (B30-104) | R - BR | MIL | Ignition switch ON | Below 1.5 V |
| Idling | 9 to 14 V | |||
| TC (A9-27) - E1 (B30-104) | G - BR | Terminal TC of DLC3 | Ignition switch ON | 9 to 14 V |
| TACH (A9-15) - E1 (B30-104) | GR - BR | Engine speed | Idling | Pulse generation WAVEFORM 11 |
| VPMP (A9-42) - E1 (B30-104) | W - BR | Vent valve (built into canister pump module) | Ignition switch ON | 9 to 14 V |
| MPMP (A9-34) - E1 (B30-104) | B - BR | Leak detection pump (built into canister pump module) | Leak detection pump OFF | Below 3 V |
| Leak detection pump ON | 9 to 14 V | |||
| VCPP (B30-70) - EPPM (B30-94) | Y - BR | Power source for canister pressure sensor (specific voltage) | Ignition switch ON | 4.5 to 5.5 V |
| PPMP (B30-71) - EPPM (B30-94) | V - BR | Canister pressure sensor (built into canister pump module) | Ignition switch ON | 3 to 3.6 V |
| ELS1 (A9-31) - E1 (B30-104) | O - BR | Electric load | Taillight switch ON | 7.5 to 14 V |
| Taillight switch OFF | Below 1.5 V | |||
| ELS3 (A9-33) - E1 (B30-104) | G - BR | Electric load | Defogger switch ON | 7.5 to 14 V |
| Defogger switch OFF | Below 1.5 V | |||
| FANL (A9-21) - E1 (B30-104) | R - BR | Fan No. 1 relay | Ignition switch ON | 9 to 14 V |
| Idling with A/C ON, or high engine coolant temperature | Below 1.5 V | |||
| FANH (A9-22) - E1 (B30-104) | W - BR | Fan No. 2 relay | Idling with high engine coolant temperature | Below 1.5 V |
| ALT (B30-50) - E1 (B30-104) | B - BR | Generator | Ignition switch ON | 9 to 14 V |
| CANH (A9-41) - E1 (B30-104) | Y - BR | CAN communication line | Ignition switch ON | Pulse generation WAVEFORM 12 Pulse generation |
| CANL (A9-49) - E1 (B30-104) | W - BR | CAN communication line | Ignition switch ON | Pulse generation WAVEFORM 13 Pulse generation |
| VCIB (B30-69) - EIB (B30-92) | R - BR | Battery current sensor | Ignition switch ON | 4.5 to 5.5 V |
| IB (B30-68) - EIB (B30-92) | B - BR | Battery current sensor | Ignition switch ON | 0.5 to 2.5 V |
| THB (B30-120) - EIB (B30-92) | LG - BR | Battery temperature sensor | Ignition switch ON, Battery temperature -30 to 80°C (-22 to 176°F) | 0.5 to 4.5 V |
| RLO (B30-51) - E1 (B30-104) | GR - BR | Generator | After engine warmed up, during charging control, vehicle driven at constant speed | Pulse generation WAVEFORM 14 |
| RLO (B30-51) - E1 (B30-104) | GR - BR | Generator | After engine warmed up, during charging control, vehicle accelerated | Pulse generation WAVEFORM 15 |
| RLO (B30-51) - E1 (B30-104) | GR - BR | Generator | After engine warmed up, during charging control, vehicle decelerated | Pulse generation WAVEFORM 16 |
HINT:
*: The ECM terminal voltage is constant regardless of the output voltage from the sensor.