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Terminals Of Ecu

  1. TERMINALS OF ECU 
    Fig 1: Identifying Skid Control ECU Connector Terminals
    G05389444Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    SKID CONTROL ECU CONNECTOR TERMINALS REFERENCE CHART

    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
    11 (SP1) Speed signal output for speedometer
    12 (+BS) Solenoid relay power supply
    13 (GND2) Pump motor ground
    14 (CANL) CAN communication line L
    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
    24 (+BM) Motor relay power supply
    25 (CANH) CAN communication line H
    30 (CSW) VSC OFF switch input
    33 (TS) Sensor check input
    34 (IG1) ECU power supply
  2. TERMINAL INSPECTION 
    1. Disconnect the connector and measure the voltage or resistance on the wire harness side.
      Fig 2: Identifying A38 Skid Control ECU Connector Terminals
      G06034977Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

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

      Standard 

      A38 SKID CONTROL ECU CONNECTOR TERMINALS VOLTAGE SPECIFIED CONDITION

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A38-1 (GND1) - Body ground W-B - Body ground Skid control ECU ground Always Below 1 Ω
      A38-2 (STP) - Body ground L-W - Body ground Stop light switch input Stop light switch ON → OFF (Brake pedal depressed → released) 8 to 14 V → Below 1.5 V
      A38-12 (+BS) - Body ground W - Body ground Solenoid relay power supply Always 11 to 14 V
      A38-13 (GND2) - Body ground W-B - Body ground Pump motor ground Always Below 1 Ω
      A38-24 (+BM) - Body ground L - Body ground Motor relay power supply Always 11 to 14 V
      A38-30 (CSW) - Body ground P - Body ground VSC OFF switch input VSC OFF switch held ON → OFF (Not pressed) Below 25 Ω → 10 kΩ or higher
      A38-34 (IG1) - Body ground L-B - Body ground ECU power supply Ignition switch ON 11 to 14V
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