VEHICLE STABILITY CONTROL SYSTEM TERMINALS OF ECU


  1. TERMINALS OF ECU

    A004U4BE01
    Text in Illustration
    *a

    Component without harness connected

    (Skid Control ECU (Brake Actuator Assembly))

    		 - -
    Terminal No. (Symbol) Terminal Description
    1 (+BS) ABS solenoid relay power supply
    2 (CANH) CAN communication line H
    3 (TS) Sensor check input
    4 (IG1) IG1 power source input
    5 (RR-) Rear wheel speed RH (-) signal input
    6 (STP) Stop light switch assembly input
    7 (RL+) Rear wheel speed LH (+) signal input
    8 - (Not used)
    9 - (Not used)
    10 - (Not used)
    11 - (Not used)
    12 - (Not used)
    13 - (Not used)
    14 (GND1) Skid control ECU ground
    15 (+BM) Motor relay power supply
    16 (CANL) CAN communication line L
    17 - (Not used)
    18 (FR+) Front wheel speed RH (+) signal input
    19 (RR+) Rear wheel speed RH (+) signal input
    20 (RL-) Rear wheel speed LH (-) signal input
    21 (FL+) Front wheel speed LH (+) signal input
    22 - (Not used)
    23 - (Not used)
    24 (STP2) Stop light control relay signal input
    25 - (Not used)
    26 - (Not used)
    27 (SP1) Speed signal output for speedometer
    28 (STPO) Stop light control relay output
    29 (FR-) Front wheel speed RH (-) signal input
    30 - (Not used)
    31 - (Not used)
    32 - (Not used)
    33 (FL-) Front wheel speed LH (-) signal input
    34 (CSW) VSC OFF switch input
    35 - (Not used)
    36 - (Not used)
    37 - (Not used)
    38 (GND2) Pump motor ground

  2. TERMINAL INSPECTION


    1. Disconnect the connector and measure the voltage and resistance on the wire harness side.

      A004PXWE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Skid Control ECU (Brake Actuator Assembly))

      		 - -

      Tech Tips

      The voltage cannot be measured with the connector connected to the skid control ECU (brake actuator assembly) because the connector is watertight.

      Standard
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A84-1 (+BS) - Body ground W - Body ground ABS solenoid relay power supply Always 11 to 14 V
      A84-4 (IG1) - Body ground G - Body ground IG1 power source input Ignition switch ON 11 to 14 V
      A84-6 (STP) - Body ground V - Body ground Stop light switch assembly input Stop light switch assembly ON → OFF (Brake pedal depressed → released) 11 to 14 V* → Below 1.5 V
      A84-14 (GND1) - Body ground W-B - Body ground Skid control ECU ground Always Below 1 Ω
      A84-15 (+BM) - Body ground L - Body ground Motor relay power supply Always 11 to 14 V
      A84-24 (STP2) - Body ground L- Body ground Stop light switch assembly (stop light control relay) input Stop light switch assembly ON → OFF (Brake pedal depressed → released) 11 to 14 V → Below 1.5 V
      A84-34 (CSW) - Body ground P - Body ground VSC OFF switch input VSC OFF switch ON → OFF (Pressed → not pressed) Below 1 Ω → 10 kΩ or higher
      A84-38 (GND2) - Body ground W-B - Body ground Pump motor ground Always Below 1 Ω

      Tech Tips

      *: The standard voltage value varies depending on the +BS terminal voltage value. The standard voltage is 85% of the +BS terminal voltage.