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Terminals Of Ecu

  1. Terminals of ECU 
    Fig 1: Identifying Skid Control ECU Terminals
    G04465121Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    SKID CONTROL ECU

    Symbols (Terminal No.) Terminal Description
    GND1 (1) Skid control ECU ground
    +BS (2) Solenoid valve power supply
    GL1 (4) Deceleration sensor power supply
    GGND (8) Deceleration sensor ground
    P (6) P range switch input
    FL- (9) Front LH wheel speed signal input (-)
    FL+ (10) Front LH wheel speed signal input (+)
    D/G (13) Diagnosis tester communication line
    STP (14) Stop light switch input
    RL+ (15) Rear LH wheel speed signal input (+)
    RL- (16) Rear LH wheel speed signal input (-)
    WA (17) ABS warning light output
    SP1 (18) Speed signal output for meter
    TS (20) Sensor diagnosis check input
    TC (21) Diagnosis tester communication line
    PKB (23) Parking brake switch input
    +BM (31) Motor relay power supply
    GND2 (32) Skid control ECU ground
    N (36) N range switch input
    VGS (37) Deceleration sensor signal
    FR- (39) Front RH wheel speed signal input (-)
    FR+ (40) Front RH wheel speed signal input (+)
    BRL (43) BRAKE warning light output
    RR+ (44) Rear RH wheel speed signal input (+)
    RR- (45) Rear RH wheel speed signal input (-)
    IG1 (46) ECU power supply
  2. Terminal Inspection 
    1. Disconnect the connector and measure the voltage on the wire harness side.
      Fig 2: Identifying Skid Control ECU (Disconnected)
      G04465122Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      Voltage can not be measured with the connector connected to the skid control ECU as the connector is water resistance.

      SKID CONTROL ECU (DISCONNECTED)

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      +BS (2) - GND1 (1) R - W-B Solenoid valve power supply Always 10 to 14 V
      STP (14) - GND1 (1) G-W - W-B Stop light switch input Stop light switch ON 10 to 14 V
      WA (17) - GND1 (1) W-R - W-B ABS warning light output IG switch ON, ABS warning light ON 4 V or more
      PKB (23) - GND1 (1) R-W - W-B Parking brake switch input IG switch ON, parking brake switch ON Below 2.0 V
      PKB (23) - GND1 (1) R-W - W-B Parking brake switch input IG switch ON, parking brake switch OFF 8 to 14 V
      +BM (31) - GND2 (32) L - W-B Motor relay power supply Always 10 to 14 V
      BRL (43) - GND1 (1) R - W-B BRAKE warning light output IG switch ON, BRAKE warning light ON 4 V or more
      IG1 (46) - GND1 (1) B-W - W-B ECU power supply IG switch ON 10 to 14 V
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