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Terminals Of Ecu

  1. Terminals of ECU 
    Fig 1: Identifying Skid Control ECU Connector Terminals
    G04832163Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINAL DESCRIPTION CHART

    Symbols (Terminals No.) Terminal Description
    +BS (A15-1) Solenoid valve power supply
    GND1 (A15-2) Skid control ECU ground
    CANL (A15-5) CAN communication line L
    CANH (A15-6) CAN communication line H
    FL- (A15-8) Front LH wheel speed signal input
    FL+ (A15-9) Front LH wheel speed sensor power supply
    STP (A15-10) Stop light switch input
    RL+ (A15-11) Rear LH wheel speed sensor power supply
    RL- (A15-12) Rear LH wheel speed signal input
    +BM (A15-23) Motor relay power supply
    GND2 (A15-24) Actuator pump motor ground
    IG1 (A15-25) ECU power supply
    FR- (A15-30) Front RH wheel speed signal input
    FR+ (A15-31) Front RH wheel speed sensor power supply
    RR+ (A15-33) Rear RH wheel speed sensor power supply
    RR- (A15-34) Rear RH wheel speed signal input
    Fig 2: Identifying Main Body ECU Connectors Terminals (Rear View)
    G04832164Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINAL DESCRIPTION CHART

    Symbols (Terminals No.) Terminal Description
    PKB (4C-2) Parking brake switch input
  2. Terminal inspection 
    1. Disconnect the connector and measure the resistance and voltage on the wire harness side.

      HINT:

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

      Fig 3: Identifying Skid Control ECU Connector Terminals
      G04832165Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      VOLTAGE AND RESISTANCE SPECIFICATION

      Symbols Wiring Color Terminal Description Conditions Specified Conditions
      +BS (A15-1) - Body ground W - Body ground Solenoid valve power supply Always 11 to 14 V
      GND1 (A15-2) - Body ground W-B - Body ground Skid control ECU ground Always Below 1 Ω
      STP (A15-10) - Body ground G - Body ground Stop light switch input Stop light switch ON Brake pedal depressed 8 to 14 V
      STP (A15-10) - Body ground G - Body ground Stop light switch input Stop light switch OFF Brake pedal released Below 1.5 V
      +BM (A15-23) - Body ground B - Body ground Motor relay power supply Always 11 to 14 V
      GND2 (A15-24) - Body ground W-B - Body ground Actuator pump motor ground Always Below 1 Ω
      IG1 (A15-25) - Body ground B - Body ground ECU power supply Ignition switch ON 11 to 14 V
      Fig 4: Identifying Main Body ECU Terminals
      G04832166Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance: 

      RESISTANCE SPECIFICATION

      Symbols Wiring Color Terminal Description Conditions Specified Conditions
      PKB (4C-2) - Body ground Y - Body ground Parking brake switch input Parking brake switch ON Below 1 Ω
      PKB (4C-2) - Body ground Y - Body ground Parking brake switch input Parking brake switch OFF 10 kΩ or higher
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