Terminals of ECU
| *a | Component without harness connected (Skid Control ECU (Brake Actuator Assembly)) |
| Terminals No. (Symbol) | Terminal Description |
|---|---|
| 1 (+BS) | Solenoid relay power supply |
| 2 (RL-) | Rear LH wheel speed signal input |
| 3 (RL+) | Rear LH wheel speed sensor power supply |
| 4 | - (Not used) |
| 5 (FR+) | Front RH wheel speed sensor power supply |
| 6 (FR-) | Front RH wheel speed signal input |
| 7 (LVL2) | Brake fluid level warning switch input |
| 8 (FL-) | Front LH wheel speed signal input |
| 9 (FL+) | Front LH wheel speed sensor power supply |
| 10 | - (Not used) |
| 11 (RR+) | Rear RH wheel speed sensor power supply |
| 12 (RR-) | Rear RH wheel speed signal input |
| 13 (GND1) | Pump motor ground |
| 14 (+BM) | Motor relay input |
| 15 | - (Not used) |
| 16 | - (Not used) |
| 17 (STP) | Stop light switch input |
| 18 | - (Not used) |
| 19 | - (Not used) |
| 20 (IG1) | ECU power supply |
| 21 (CANL) | CAN communication line Low |
| 22 | - (Not used) |
| 23 (CANH) | CAN communication line High |
| 24 (SP1) | Speed signal output for combination meter |
| 25 (CSW) | VSC OFF switch input |
| 26 (GND2) | Skid control ECU ground |
Terminal inspection
| *A | for LHD with CVT, and RHD |
| *B | for LHD except CVT |
| *a | Front view of wire harness connector (to Skid Control ECU (Brake Actuator Assembly)) |
Disconnect the connector and measure the resistance and voltage on the wire harness side.
Tech Tips
The voltage cannot be measured with the connector connected to the skid control ECU as the connector is water resistant.
| Terminals No. (Symbol) | Wiring Color | Terminal Description | Conditions | Specified Conditions |
|---|---|---|---|---|
| A78-1 (+BS) - Body ground | W - Body ground | Solenoid relay power supply | Always | 11 to 14 V |
| A78-13 (GND1) - Body ground | W-B - Body ground | Pump motor ground | Always | Below 1 Ω |
| A78-14 (+BM) - Body ground | B - Body ground | Motor relay input | Always | Below 1 Ω |
| A78-17 (STP) - Body ground | P - Body ground | Stop light switch input | Brake pedal released | Below 1.5 V |
| Brake pedal depressed | 8 to 14 V | |||
| A78-20 (IG1) - Body ground | L - Body ground | ECU power supply | Ignition switch ON | 11 to 14 V |
| A78-26 (GND2) - Body ground | W-B - Body ground | Skid control ECU ground | Skid control ECU ground | Below 1 Ω |
| Terminals No. (Symbol) | Wiring Color | Terminal Description | Conditions | Specified Conditions |
|---|---|---|---|---|
| A79-1 (+BS) - Body ground | W - Body ground | Solenoid relay power supply | Always | 11 to 14 V |
| A79-13 (GND1) - Body ground | W-B - Body ground | Pump motor ground | Always | Below 1 Ω |
| A79-14 (+BM) - Body ground | B - Body ground | Motor relay input | Always | Below 1 Ω |
| A79-17 (STP) - Body ground | P - Body ground | Stop light switch input | Brake pedal released | Below 1.5 V |
| Brake pedal depressed | 8 to 14 V | |||
| A79-20 (IG1) - Body ground | L - Body ground | ECU power supply | Ignition switch ON | 11 to 14 V |
| A79-26 (GND2) - Body ground | W-B - Body ground | Skid control ECU ground | Skid control ECU ground | Below 1 Ω |