Terminals Of Ecu
- SKID CONTROL ECU
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Terminal No. (Symbol) Terminal Description 1 (GND1) Skid control ECU ground 2 (STP) Stop light switch input 4 (RL-) Rear LH wheel speed signal input 5 (RL+) Rear LH wheel speed sensor power supply 6 (FR-) Front RH wheel speed signal input 7 (FR+) Front RH wheel speed sensor power supply 11 (SP1) Speed signal output for speedometer 12 (+BS) Solenoid valve power supply 13 (GND2) Motor ground 14 (CANL) CAN communication line L 16 (RR-) Rear RH wheel speed signal input 17 (RR+) Rear RH wheel speed signal power supply 18 (FL-) Front LH wheel speed signal input 19 (FL+) Front LH wheel speed sensor power supply 22 (STP2) Stop light control relay input 24 (BM) Motor power supply 25 (CANH) CAN communication line H 27 (FSW+)*1 Brake pedal load sensing switch input 29 (HDCS)*2 Downhill assist control switch input 30 (CSW) VSC OFF switch input 31 (STPO) Stop light control relay output 33 (TS) Sensor diagnosis check input 34 (IG1) ECU power supply HINT:
*1: w/ Booster Failure Compensation
*2: w/ Downhill Assist Control
- CHECK SKID CONTROL ECU
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Disconnect the A19 ECU connector.
- Measure the voltage and resistance of the wire harness side connector.
HINT:
The voltage cannot be measured with the connector connected to the skid control ECU as the connector is water resistant.
SKID CONTROL ECU:Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition A19-1 (GND1) - Body ground W-B - Body ground Skid control ECU ground Always Below 1 Ω A19-2 (STP) - Body ground L - Body ground Stop light switch input Stop light switch off
Brake pedal releasedBelow 1.5 V Stop light switch on
Brake pedal depressed8 to 14 V A19-12 (+BS) - Body ground W - Body ground Solenoid valve power supply Always 11 to 14 V A19-13 (GND2) - Body ground W-B - Body ground Motor ground Always Below 1 Ω A19-22 (STP2) - Body ground L - Body ground Stop light control relay input Stop light switch off
Brake pedal releasedBelow 1.5 V Stop light switch on
Brake pedal depressed8 to 16 V A19-24 (BM) - Body ground B - Body ground Motor power supply Always 11 to 14 V A19-27 (FSW+)*1 - Body ground P - Body ground Brake pedal load sensing switch input Brake pedal load sensing switch on
Brake pedal not depressed beyond the specified point192 to 234 Ω Brake pedal load sensing switch off
Brake pedal depressed beyond the specified point0.9 to 1.1 kΩ A19-29 (HDCS)*2 - Body ground Y - Body ground Downhill assist control switch input Downhill assist control switch on Below 1 Ω Downhill assist control switch off 10 kΩ or higher A19-30 (CSW) - Body ground L - Body ground VSC OFF switch input VSC OFF switch on Below 1 Ω VSC OFF switch off 10 kΩ or higher A19-31 (STPO) - Body ground W - Body ground Stop light control relay output Ignition switch ON 11 to 14 V A19-34 (IG1) - Body ground L - Body ground ECU power supply Ignition switch ON 11 to 14 V HINT:
*1: w/ Booster Failure Compensation
*2: w/ Downhill Assist Control
If the result is not as specified, there may be a malfunction on the wire harness side.
- CHECK INSTRUMENT PANEL JUNCTION BLOCK (MAIN BODY ECU)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Disconnect the ID junction block connector.
- Measure the resistance of the wire harness side connector.
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition ID-4 (PKB) - Body ground B - Body ground Parking brake switch input Parking brake switch on Below 1 Ω Parking brake switch off 10 kΩ or higher If the result is not as specified, there may be a malfunction on the wire harness side.
- Reconnect the ID junction block connector.
- Measure the voltage of the wire harness side connector.
Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition ID-4 (PKB) - Body ground B - Body ground Parking brake switch input Parking brake switch on Below 1 V Parking brake switch off 11 to 14 V If the result is not as specified, the junction block (main body ECU) may be a malfunction.