ECM
Tech Tips
The standard voltage and resistance of each ECM terminal 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 voltage or resistance for that pair of terminals shown in the "Specified Condition" column
Use the illustration above as a reference for the ECM terminals.
| Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| A38-1 (BATT) - C62-53 (E1) | B - W-B | Battery (for measuring battery voltage and for ECM memory) | Always | 11 to 14 V |
| A38-2 (+B) - C62-53 (E1) | R - W-B | Power source of ECM | Ignition switch ON | 11 to 14 V |
| A38-3 (+B2) - C62-53 (E1) | R - W-B | Power source of ECM | Ignition switch ON | 11 to 14 V |
| A38-44 (SPD) - C62-53 (E1) | V - W-B | Vehicle speed signal from combination meter assembly signal | Vehicle being driven | Pulse generation |
| A38-46 (MREL) - C62-53 (E1) | G - W-B | EFI-MAIN relay | Ignition switch ON | 11 to 14 V |
| C62-48 (+BM) - C62-53 (E1) | GR - W-B | Power source of throttle actuator | Always | 11 to 14 V |
| C62-53 (E1) - Body ground | W-B - Body ground | Ground | Always | Below 1 Ω |
| C62-76 (NE+) - C62-109 (NE-) | R - Y | Crankshaft position sensor signal | Idling with warm engine | Pulse generation |
| C62-110 (VCNE) - C62-53 (E1) | L - W-B | Power source of crankshaft position sensor (specific voltage | Engine stopped, ignition switch ON | 4.5 to 5.5 V |
| C62-44 (NIM+) - C62-43 (NIM-) | P - V | Transmission revolution sensor signal | Engine idling and clutch pedal fully released | Pulse generation |
| A38-36 (MTMS) - C62-53 (E1) | SB - W-B | iMT switch signal | Ignition switch ON and iMT switch pushed | Below 1.5 V |
| Ignition switch ON and iMT switch not pushed | 11 to 14 V | |||
| A38-13 (CANH) - C62-53 (E1) | R - W-B | CAN communication line | Ignition switch ON | Pulse generation |
| A38-26 (CANL) - C62-53 (E1) | P - W-B | CAN communication line | Ignition switch ON | Pulse generation |
| C62-119 (CLS) - C62-87 (E2CL) | G - W | Clutch pedal stroke sensor signal | Ignition switch ON and clutch pedal fully released | 0.2 to 1.5 V |
| Ignition switch ON and clutch pedal fully depressed | 2.5 to 4.8 V | |||
| C62-89 (VCCL) - C62-53 (E1) | R - W-B | Power supply for clutch stroke sensor | Ignition switch ON | 4.5 to 5.5 V |