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Terminals Of Ecu

  1. Terminals of ECU 
    Fig 1: Identifying Terminals Of ECU
    G05001526Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    CONNECTOR TERMINAL REFERENCE

    Symbols (Terminal No.) Terminal Description
    GND2 (1) Motor ground
    BM (2) Motor relay test input
    FR+ (3) Front RH wheel speed signal input (+)
    FL- (4) Front LH wheel speed signal input (-)
    RR+ (5) Rear RH wheel speed signal input (+)
    RL- (6) Rear LH wheel speed signal input (-)
    CANH (11) Can communication line H
    SP1 (12) Speed signal output
    D/G (13) Diagnostic tester communication line
    MRF (14) Fail safe motor relay output
    MR (15) Motor relay output
    STPO (16) Stop light relay output
    FR- (17) Front RH wheel speed signal input (-)
    FL+ (18) Front LH wheel speed signal input (+)
    RR- (19) Rear RH wheel speed signal input (-)
    RL+ (20) Rear LH wheel speed signal input (+)
    STP2 (21) Stop light relay output
    TS (24) Sensor check input
    CANL (25) Can communication line L
    STP1 (27) Stop light switch input
    PKB (28) Parking brake switch input
    BZ (30) Buzzer output
    +BS (31) Solenoid relay power supply
    GND1 (32) Skid control ECU ground
    RRO (39) Rear RH wheel speed signal output
    RLO (40) Rear LH wheel speed signal output
    WFSE (42) WFSE input
    R+ (45) Power supply for motor relay
    IG1 (46) IG1 power supply
  2. Terminal Inspection 
    1. Disconnect the connector and measure the voltage on the wire harness side.

    HINT:

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

    Fig 2: Identifying A34 Skid Control ECU Connector
    G05001527Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    CONNECTOR TERMINAL REFERENCE

    Symbols (Terminal No.) Wining Color Terminal Description Condition Specified Condition
    GND2 (1) - Body ground W-B - Body ground Motor ground IG switch OFF Below 1 Ω
    STP1 (27) - GND (1,32) L-B - W-B Stop light switch input Stop light switch ON (Brake pedal pushed) 8 to 14 V
    STP1 (27) - GND (1,32) L-B - W-B Stop light switch input Stop light switch OFF (Brake pedal released) Below 1.5 Ω
    PKB (28) - GND (1,32) V - W-B Parking brake switch input IG switch ON (IG), parking brake switch ON Below 1
    PKB (28) - GND (1,32) V - W-B Parking brake switch input IG switch ON (IG), parking brake switch OFF 10 kΩ or higher
    +BS (31) - GND (1,32) L - W-B Solenoid relay power supply Always 10 to 14 V
    GND1 (32) - Body ground W-B - Body ground Skid control ECU ground IG switch OFF Below 1 Ω
    IG1 (46) - GND (1,32) BR - W-B IG1 power supply IG switch ON (IG) 10 to 14 V
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