ANTI-LOCK BRAKE SYSTEM TERMINALS OF ECU


  1. TERMINALS OF ECU

    A01DNE5E04
    Text in Illustration
    *a

    Component without harness connected

    (Skid Control ECU [Brake Actuator Assembly])
    Terminal No. (Symbol) Terminal Description
    1 (GND1) Skid control ECU ground
    2 (STP) Stop light switch input
    4 (RL-) Rear wheel speed LH (-) signal input
    5 (RL+) Rear wheel speed LH (+) power supply output
    6 (FR-) Front wheel speed RH (-) signal input
    7 (FR+) Front wheel speed RH (+) power supply output
    8 (EX0) Stop light control ECU outputt
    9 (EXI4) Center differential lock detection switch input
    11 (SP1) Speed signal output for speedometer
    12 (+BS) Solenoid relay power supply
    13 (GND2) Pump motor ground
    14 (CANL) CAN communication line low
    16 (RR-) Rear wheel speed RH (-) signal input
    17 (RR+) Rear wheel speed RH (+) power supply output
    18 (FL-) Front wheel speed LH (-) signal input
    19 (FL+) Front wheel speed LH (+) power supply output
    22 (STP2) Stop light control ECU input
    24 (BM) Motor relay power supply
    25 (CANH) CAN communication line high
    27 (FSW+) Brake pedal load sensing switch input
    29 (HZRI) Hazard warning switch input
    33 (TS) Sensor check input
    34 (IG1) ECU power supply

  2. TERMINAL INSPECTION

    A01DMHLE12
    Text in Illustration
    *a

    Front view of wire harness connector

    (to Skid Control ECU [Brake Actuator Assembly])

    1. Disconnect the connector 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 (brake actuator assembly) as the connector is watertight.


      1. Disconnect the skid control ECU (brake actuator assembly) connector.

      2. Measure the voltage and resistance according to the value(s) in the table below.

        Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
        A6-1 (GND1) - Body ground W-B - Body ground Skid control ECU ground Always Below 1 Ω
        A6-2 (STP) - Body ground V - Body ground Stop light switch input Brake pedal depressed → released 8 to 14 V → Below 1.5 V
        A6-12 (+BS) - Body ground L-R - Body ground Solenoid relay power supply Always 11 to 14 V
        A6-13 (GND2) - Body ground W-B - Body ground Pump motor ground Always Below 1 Ω
        A6-22 (STP2) - Body ground L - Body ground Stop light control ECU input Brake pedal depressed → released 8 to 14 V → Below 1.5 V
        A6-24 (BM) - Body ground B - Body ground Motor relay power supply Always 11 to 14 V
        A6-25 (CANH) - A6-14 (CANL) B*1, R*2 - W CAN bus Ignition switch off 54 to 69 Ω
        A6-27 (FSW+) - Body ground V-G - Body ground Brake pedal load sensing switch input Brake pedal depressed → released 950 to 1050 Ω → 203 to 223 Ω
        A6-34 (IG1) - Body ground G - Body ground ECU power supply Ignition switch ON 11 to 14 V

        • *1: for LHD

        • *2: for RHD