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Terminals Of Ecu

  1. TERMINALS OF ECU 
    Fig 1: Identifying ECU Connector Terminal
    G05401171Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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
    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 Skid Control ECU Connector Terminal
      G05401172Courtesy 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: 

      ECU CONNECTOR TERMINALS REFERENCE CHART

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A15-1 (GND1) - Body ground W-B - Body ground Skid control ECU ground Always Below 1 Ω
      A15-2 (STP) - Body ground G - Body ground Stop light switch input Stop light switch ON → OFF (Brake pedal depressed → released) 8 to 14 V → Below 1.5 V
      A15-12 (+BS) - Body ground W - Body ground Solenoid relay power supply Always 11 to 14 V
      A15-13 (GND2) - Body ground W-B - Body ground Pump motor ground Always Below 1 Ω
      A15-24 (+BM) - Body ground B - Body ground Motor relay power supply Always 11 to 14 V
      A15-25 (CANH) - A15-14 (CANL) G-W CAN BUS Ignition switch OFF 54 to 69 Ω
      A15-30 (CSW) - Body ground B - Body ground VSC OFF switch input VSC OFF switch held ON → OFF (Not pressed) Below 25 Ω → 10 kΩ or higher
      A15-34 (IG1) - Body ground B - Body ground ECU power supply Ignition switch ON 11 to 14 V
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