ANTI-LOCK BRAKE SYSTEM TERMINALS OF ECU


  1. Terminals of ECU

    A0138Z8E01
    Text in Illustration
    *a

    Component without harness connected

    (Skid Control ECU (Brake Actuator Assembly))
    Terminals No. (Symbol) Terminal Description
    1 (+BM) Motor relay power supply
    2 (SP1) Speed signal output for meter
    3 (WA) ABS warning light output
    4 (FR-) Front RH wheel speed signal input
    6 (D/G) Diagnosis tester communication line
    8 (FL-) Front LH wheel speed signal input
    13 (GND2) Actuator pump motor ground
    15 (TS) Sensor diagnosis check input
    16 (FR+) Front RH wheel speed sensor power supply
    17 (RR+) Rear RH wheel speed sensor power supply
    18 (RL-) Rear LH wheel speed signal input
    19 (FL+) Front LH wheel speed sensor power supply
    20 (TC) Diagnosis code check input
    25 (+BS) Solenoid valves power supply
    27 (EBDW) Brake warning line
    28 (IG1) ECU power supply
    29 (RR-) Rear RH wheel speed signal input
    30 (STP) Stop light switch input
    31 (RL+) Rear LH wheel speed sensor power supply
    33 (PKB) Parking brake switch input
    38 (GND1) Skid control ECU ground

  2. Terminal inspection


    1. A0136PEE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Skid Control ECU (Brake Actuator Assembly))

      Disconnect the skid control ECU connector and measure the resistance and voltage on the wire harness side.

      Tech Tips

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

      Terminal No. (Symbol) Wiring Color Terminal Description Conditions Specified Conditions
      A46-1 (+BM) - Body ground B - Body ground Motor relay power supply Always 11 to 14 V
      A46-3 (WA) - Body ground P - Body ground ABS warning light output

      Ignition switch ON

      ABS warning light on

      		 5 to 14 V
      A46-13 (GND2) - Body ground W-B - Body ground Actuator pump motor ground Always Below 1 Ω
      A46-25 (+BS) - Body ground R - Body ground Solenoid valves power supply Always 11 to 14 V
      A46-27 (EBDW) - Body ground W - Body ground Brake warning line

      Ignition switch ON

      Brake warning light on

      		 5 to 14 V
      A46-28 (IG1) - Body ground L - Body ground ECU power supply Ignition switch ON 11 to 14 V
      A46-30 (STP) - Body ground G - Body ground Stop light switch input Stop light switch ON → OFF (Brake pedal depressed → released) 11 to 14 V* → Below 1.5 V
      A46-33 (PKB) - Body ground Y - Body ground Parking brake switch input Parking brake switch on → Parking brake switch off Below 1 Ω → 10 kΩ or higher
      A46-38 (GND1) - Body ground BR - Body ground Skid control ECU 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.