Check At Ecu Terminals
ECU REFERENCE
| Terminal No. | Check item | Check conditions | Normal conditions |
|---|---|---|---|
| 1 | ECU power supply (battery) | Always | Battery positive voltage |
| 2 | ECU power supply (Ignition switch: IG1) | Ignition switch: ON | Battery positive voltage |
| Ignition switch: OFF | 0 V | ||
| 3 | Meter information switch input | Meter information switch: ON | 0 V |
| Meter information switch: OFF | Battery positive voltage | ||
| 4 | Parking brake switch input | Parking brake switch: ON | 0 V |
| Parking brake switch: OFF | Battery positive voltage | ||
| 5 | Seat belt switch (driver's side) input | Seat belt switch (driver's side): ON | 0 V |
| Seat belt switch (driver's side): OFF | Battery positive voltage | ||
| 6 | Headlight leveling | During headlight leveling warning display | 0 V |
| Without headlight leveling warning display | Battery positive voltage | ||
| 7 to 12 | - | - | - |
| 13 | Ground (sensor) | Always | 0 V |
| 14 to 16 | - | - | - |
| 17 | Fuel level sensor input | - | Depending on the condition of the fuel level sensor, the voltage changes. |
| 18 | Fuel level sensor input | Fuel: FULL | Approximately 2 V |
| Fuel: EMPTY | Approximately 8 V | ||
| 19 | - | - | - |
| 20 | Vehicle speed signal output | Vehicle speed: Approximately 25 mph (40 km/h) | Approximately 28Hz |
| Vehicle speed change | In accordance with the vehicle speed, a pulse is generated. | ||
| 21 | Ground (ECU) | Always | 0 V |
| 22 | Illumination (-) output | With daytime lighting control | 0 V |
| With nighttime lighting control | In accordance with the rheostat switch operation, a pulse is generated. | ||
| 23 | Illumination (+) output | With lighting control | Battery positive voltage |
| 24 | Illumination (power supply) | Always | Battery positive voltage |