Brake. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
Brake Control. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
Anti-Lock Brake System -- Terminals Of Ecu |
| SKID CONTROL ECU |
| Symbol (Terminal No.) | Terminal Description |
| +BS (A27-1) | Solenoid valve power supply |
| GND1 (A27-2) | Skid control ECU ground |
| GL1 (A27-4) | Deceleration sensor signal input |
| CANL (A27-5) | CAN communication line L |
| CANH (A27-6) | CAN communication line H |
| GGND (A27-7) | Deceleration sensor ground |
| FL- (A27-8) | Front LH wheel speed signal input |
| FL+ (A27-9) | Front LH wheel speed sensor power supply |
| STP (A27-10) | Stop light switch input |
| RL+ (A27-11) | Rear LH wheel speed sensor power supply |
| RL- (A27-12) | Rear LH wheel speed signal input |
| TS (A27-15) | Sensor diagnosis check input |
| +BM (A27-23) | Motor relay power supply |
| GND2 (A27-24) | Actuator pump motor ground |
| IG1 (A27-25) | ECU power supply |
| SP1 (A27-26) | Speed signal output for speedometer |
| VGS (A27-28) | Deceleration sensor power supply |
| FR- (A27-30) | Front RH wheel speed signal input |
| FR+ (A27-31) | Front RH wheel speed sensor power supply |
| RR+ (A27-33) | Rear RH wheel speed sensor power supply |
| RR- (A27-34) | Rear RH wheel speed signal input |
| CHECK SKID CONTROL ECU |
Disconnect the A27 ECU connector.
Measure the voltage and resistance of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition +BS (A27-1) - Body ground W - Body ground Solenoid valve power supply Always 11 to 14 V GND1 (A27-2) - Body ground W-B - Body ground Skid control ECU ground Always Below 1 Ω STP (A27-10) - Body ground L - Body ground Stop light switch input Stop light switch ON
Brake pedal depressed8 to 14 V STP (A27-10) - Body ground L - Body ground Stop light switch input Stop light switch OFF
Brake pedal releasedBelow 1.5 V +BM (A27-23) - Body ground B - Body ground Motor relay power supply Always 11 to 14 V GND2 (A27-24) - Body ground W-B - Body ground Actuator pump motor ground Always Below 1 Ω IG1 (A27-25) - Body ground L - Body ground ECU power supply Ignition switch ON 11 to 14 V
| CHECK INSTRUMENT PANEL JUNCTION BLOCK (MAIN BODY ECU) |
Disconnect the ID junction block connector.
Measure the resistance of the wire harness side connector.
If the result is not as specified, there may be a malfunction on the wire harness side.Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition PKB (ID-4) - Body ground B - Body ground Parking brake switch input Parking brake switch ON Below 1 Ω PKB (ID-4) - Body ground B - Body ground Parking brake switch input Parking brake switch OFF 10 kΩ or higher Reconnect the ID junction block connector.
Measure the voltage of the wire harness side connector.
If the result is not as specified, there may be a malfunction in the junction block (ECU).Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition PKB (ID-4) - Body ground B - Body ground Parking brake switch input Ignition switch ON
Parking brake switch ONBelow 1 V PKB (ID-4) - Body ground B - Body ground Parking brake switch input Ignition switch ON
Parking brake switch OFF11 to 14 V