Terminals Of Ecu
- TERMINALS OF ECU
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TEXT IN ILLUSTRATION*a Component without harness connected
(Skid Control ECU)- - Terminal No. (Symbol) Terminal Description A6-1 (GND1) Skid control ECU ground A6-2 (+BM1) Power supply for motor A6-3 (FR+) Front speed sensor RH power supply output A6-4 (FL-) Front speed sensor LH input A6-5 (RR+) Rear speed sensor RH power supply output A6-6 (RL-) Rear speed sensor LH input A6-7 (STP) Stop light switch A6-9 (CSW) VSC OFF switch A6-11 (CANH) CAN communication terminal H A6-12 (SP1) Speedometer signal A6-13 (ATRC)*1 A-TRAC switch A6-16 (STPO) Stop light operation relay A6-17 (FR-) Front speed sensor RH input A6-18 (FL+) Front speed sensor LH power supply output A6-19 (RR-) Rear speed sensor RH input A6-20 (RL+) Rear speed sensor LH power supply output A6-24 (TS) Sensor test terminal (Signal check switch) A6-25 (CANL) CAN communication terminal L A6-27 (EXI)*1 for Part-time 4WD: A.D.D. detection switch
for Full-time 4WD: Center differential lock detection switchA6-31 (+BS) Power supply for solenoid A6-32 (GND2) Skid control ECU ground A6-40 (EXI3) w/ Rear Differential Lock: Rear differential lock detection switch
w/o Rear Differential Lock: IG power supplyA6-41 (LBL) Brake fluid level warning switch A6-44 (HDCS)*2 Downhill assist control switch A6-45 (STP2) Stop light switch A6-46 (IG1) IG1 power supply A7-1 (IG2) IG2 power supply A7-2 (+BM2) Power supply for motor A7-4 (GND3) Skid control ECU ground - *1: for 4WD
- *2: w/ Downhill Assist Control
- TERMINAL INSPECTION
- Disconnect the connector and measure the voltage or resistance on the wire harness side.
HINT:
The voltage cannot be measured with the connector connected to the skid control ECU as the connector is watertight.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TEXT IN ILLUSTRATION*a Front view of wire harness connector
(to Skid Control ECU)- - Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition A6-2 (+BM1) - Body ground B Power supply for motor
(from battery)Always 11 to 14 V A6-7 (STP) - Body ground L Stop light switch Brake pedal depressed → released 8 to 14 V → Below 1.5 V A6-9 (CSW) - Body ground V-W VSC OFF switch input VSC OFF switch off → on and held 10 kΩ or higher → Below 1 Ω A6-13 (ATRC) - Body ground*1 LG A-TRAC switch input A-TRAC switch off → on and held 10 kΩ or higher → Below 1 Ω A6-16 (STP0) - Body ground LG-B Stop light operation relay Ignition switch off → ON Below 1.1 V → 11 to 14 V A6-31 (+BS) - Body ground L-R Power supply for solenoid
(from battery)Always 11 to 14 V A6-41 (LBL) - Body ground V-G Brake fluid level warning switch Brake fluid level +/-5 mm (+/-0.197 in.) from minimum level → maximum level Below 1 Ω → 1.9 to 2.1 kΩ A6-44 (HDCS) - Body ground*2 P Downhill assist control switch input Downhill assist control switch off → on 10 kΩ or higher → Below 1 Ω A6-45 (STP2) - Body ground V-G Stop light switch Brake pedal depressed → released 8 to 14 V → Below 1.5 V A6-46 (IG1) - Body ground G IG1 power supply Ignition switch off → ON Below 1 V → 11 to 14 V A7-1 (IG2) - Body ground W IG2 power supply Ignition switch off → ON Below 1 V → 11 to 14 V A7-2 (+BM2) - Body ground B Power supply for motor
(from battery)Always 11 to 14 V A6-1 (GND1) - Body ground W-B Ground Always Below 1 Ω A6-32 (GND2) - Body ground W-B Ground Always Below 1 Ω A7-4 (GND3) - Body ground W-B Ground Always Below 1 Ω - *1: for 4WD
- *2: w/ Downhill Assist Control
- Disconnect the connector and measure the voltage or resistance on the wire harness side.