VEHICLE STABILITY CONTROL SYSTEM(for Hydraulic Brake Booster) TERMINALS OF ECU


  1. TERMINALS OF ECU

    B001D8YE01
    Text in Illustration
    *a

    Component without harness connected

    (Skid Control ECU (Master Cylinder Solenoid))

    		 - -
    Terminal No. (Symbol) Terminal Description
    A7-1 (GND1) Skid control ECU ground
    A7-2 (+BM1) Power supply for motor
    A7-3 (FR+) Front speed sensor RH power supply output
    A7-4 (FL-) Front speed sensor LH input
    A7-5 (RR+) Rear speed sensor RH power supply output
    A7-6 (RL-) Rear speed sensor LH input
    A7-7 (STP) Stop light switch
    A7-9 (CSW) VSC OFF switch (Combination switch assembly)*1
    VSC OFF switch (No. 2 combination switch assembly)*2
    VSC OFF switch*3
    A7-11 (CANH) CAN communication terminal high
    A7-12 (SP1) Speedometer signal
    A7-13 (TRM3)*1 CRAWL speed selector switch (Combination switch assembly)
    A7-16 (STPO) Stop light operation relay
    A7-17 (FR-) Front speed sensor RH input
    A7-18 (FL+) Front speed sensor LH power supply output
    A7-19 (RR-) Rear speed sensor RH input
    A7-20 (RL+) Rear speed sensor LH power supply output
    A7-21 (TRM2)*1 CRAWL speed selector switch (Combination switch assembly)
    A7-25 (CANL) CAN communication terminal low
    A7-27 (EXI) Center differential lock detection switch
    A7-28 (HZRI)*4 Downhill assist control switch
    A7-29 (EXI4)*1 MULTI-TERRAIN selector switch (Combination switch assembly)
    A7-31 (+BS) Power supply for solenoid
    A7-32 (GND2) Skid control ECU ground
    A7-40 (EXI3) Rear differential lock detection switch*1
    4 wheel drive control ECU
    A7-41 (LBL) Brake fluid level warning switch
    A7-43 (TRS)*1 CRAWL ON/OFF switch (Combination switch assembly)
    A7-44 (TRM1)*1 CRAWL speed selector switch (Combination switch assembly)
    A7-45 (STP2) Stop light switch
    A7-46 (IG1) IG1 power supply
    A8-1 (IG2) IG2 power supply
    A8-2 (+BM2) Power supply for motor
    A8-4 (GND3) Skid control ECU ground

    • *1: w/ Combination Switch

    • *2: w/o Combination Switch (w/ Downhill Assist Control)

    • *3: w/o Combination Switch (w/o Downhill Assist Control)

    • *4: w/ Downhill Assist Control

    • *5: w/ Rear Differential Lock

  2. TERMINAL INSPECTION

    Disconnect the 2 skid control ECU connectors and measure the voltage or resistance on the wire harness side.

    Tech Tips

    Voltage cannot be measured with the connector connected to the skid control ECU as the connector is watertight.

    B001CXVE01
    Text in Illustration
    *a

    Front view of wire harness connector

    (to Skid Control ECU (Master Cylinder Solenoid))

    		 - -
    Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
    A7-2 (+BM1) - Body ground B

    Power supply for motor

    (from battery)

    		 Always 11 to 14 V
    A7-7 (STP) - Body ground L Stop light switch Brake pedal depressed → released 8 to 14 V → Below 1.5 V
    A7-9 (CSW) - Body ground B VSC OFF switch input VSC OFF switch off → on and held 10 kΩ or higher → Below 1 Ω
    A7-16 (STPO) - Body ground LG Stop light operation relay Ignition switch off → ON Below 1.1 V → 11 to 14 V
    A7-28 (HZRI)* - Body ground W Downhill assist control switch input Downhill assist control switch off → on 10 kΩ or higher → Below 1 Ω
    A7-31 (+BS) - Body ground L-R

    Power supply for solenoid

    (from battery)

    		 Always 11 to 14 V
    A7-41 (LBL) - Body ground V-G Brake fluid level warning switch Brake fluid level +/-5 mm (+/-0.196 in.) from minimum level → maximum level Below 1 Ω → 1.9 to 2.1 kΩ
    A7-45 (STP2) - Body ground V Stop light switch Brake pedal depressed → released 8 to 14 V → Below 1.5 V
    A7-46 (IG1) - Body ground G IG1 power supply Ignition switch off → ON Below 1 V → 11 to 14 V
    A8-1 (IG2) - Body ground W IG2 power supply Ignition switch off → ON Below 1 V → 11 to 14 V
    A8-2 (+BM2) - Body ground B

    Power supply for motor

    (from battery)

    		 Always 11 to 14 V
    A7-1 (GND1) - Body ground W-B Ground Always Below 1 Ω
    A7-32 (GND2) - Body ground W-B Ground Always Below 1 Ω
    A8-4 (GND3) - Body ground W-B Ground Always Below 1 Ω

    • *: w/ Downhill Assist Control