Terminals Of Ecu
- TERMINALS OF ECU
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TEXT IN ILLUSTRATION*a Component without harness connected
(Skid Control ECU (Brake Actuator Assembly))- - Terminal No. (Symbol) Terminal Description 1 (+BM) ABS motor relay power supply 2 (SP1) Speed signal output for speedometer 3 - (Not used) 4 (FR-) Front wheel speed RH (-) signal input 5 - (Not used) 6 - (Not used) 7 - (Not used) 8 (FL-) Front wheel speed LH (-) signal input 9 (CSW) VSC OFF switch input 10 - (Not used) 11 - (Not used) 12 - (Not used) 13 (GND2) Pump motor ground 14 (CANL) CAN communication line L 15 - (Not used) 16 (FR+) Front wheel speed RH (+) signal input 17 (RR+) Rear wheel speed RH (+) signal input 18 (RL-) Rear wheel speed LH (-) signal input 19 (FL+) Front wheel speed LH (+) signal input 20 - (Not used) 21 - (Not used) 22 - (Not used) 23 - (Not used) 24 - (Not used) 25 (+BS) ABS solenoid relay power supply 26 (CANH) CAN communication line H 27 - (Not used) 28 (IG1) IG1 power source input 29 (RR-) Rear wheel speed RH (-) signal input 30 (STP) Stop light switch input 31 (RL+) Rear wheel speed LH (+) signal input 32 - (Not used) 33 - (Not used) 34 (FSW+) Brake pedal load sensing switch input 35 - (Not used) 36 - (Not used) 37 - (Not used) 38 (GND1) Skid control ECU ground - TERMINAL INSPECTION
- Disconnect the connector and measure the voltage and resistance on the wire harness side.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TEXT IN ILLUSTRATION*a Front view of wire harness connector
(to Skid Control ECU (Brake Actuator Assembly))- - HINT:
The voltage cannot be measured with the connector connected to the skid control ECU (brake actuator assembly) because the connector is watertight.
STANDARDTerminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition A49-1 (+BM) - Body ground G - Body ground ABS motor relay power supply Always 11 to 14 V A49-9 (CSW) - Body ground R - Body ground VSC OFF switch input VSC OFF switch held ON → OFF (Not pressed) Below 1 Ω → 10 kΩ or higher A49-13 (GND2) - Body ground W-B - Body ground Pump motor ground Always Below 1 Ω A49-25 (+BS) - Body ground L - Body ground ABS solenoid relay power supply Always 11 to 14 V A49-28 (IG1) - Body ground V - Body ground IG1 power source input Ignition switch ON 11 to 14 V A49-30 (STP) - Body ground GR - Body ground Stop light switch input Stop light switch ON → OFF (Brake pedal depressed → released) 11 to 14 V* → Below 1.5 V A49-34 (FSW+) - Body ground L - Body ground Brake pedal load sensing switch input Brake pedal load sensing switch OFF → ON (Brake pedal depressed → released) 950 to 1050 Ω → 203 to 223 Ω A49-38 (GND1) - Body ground W-B - Body ground Skid control ECU ground Always Below 1 Ω HINT:
*: The standard voltage value varies depending on the +BS terminal voltage value. The standard voltage is 85% of the +BS terminal voltage.
- Disconnect the connector and measure the voltage and resistance on the wire harness side.