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Terminals Of Ecu

  1. Terminal of ECU 
    Fig 1: Identifying Connector Terminals Skid Control ECU
    G05139659Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    ECU TERMINALS REFERENCE

    Symbols (Terminal No.) Terminal Description
    GND2 (1) Pump motor ground
    BM (2) Motor relay input
    FR+ (3) Front wheel speed RH signal (+) input
    FL- (4) Front wheel speed LH signal (-) input
    RR+ (5) Rear wheel speed RH signal (+) input
    RL- (6) Rear wheel speed LH signal (-) input
    CANH (11) CAN communication line H
    SP1 (12) Speed signal output for combination meter
    D/G (13) Diagnosis tester communication line
    MRF (14) Fail safe motor relay output
    MR (15) Motor relay output
    STPO (16) (1) Stop light control relay output
    FR- (17) Front wheel speed RH signal (-) input
    FL+ (18) Front wheel speed LH signal (+) input
    RR- (19) Rear wheel speed RH signal (-) input
    RL+ (20) Rear wheel speed LH signal (+) input
    STP2 (21)(1) Stop light control relay input
    TS (24) Test mode (signal check) input
    CANL (25) CAN communication line L
    STP1 (27) Stop light switch input
    BZ (30) Skid control buzzer output
    +BS (31) Solenoid relay power supply
    GND1 (32) Skid control ECU ground
    WFSE (42) WFSE input
    R+ (45) Power supply for motor relay
    IG1 (46) IG1 power supply
    (1) with dynamic radar cruise control
  2. Terminal Inspection 
    1. Disconnect the connector and measure the voltage or resistance on the wire harness side.
      Fig 2: Identifying A36 Skid Control ECU Connector Terminals
      G05250372Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

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

      Standard 

      VOLTAGE AND RESISTANCE SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GND2 (A36-1) - Body ground W-B - Body ground Pump motor ground Engine switch off Below 1 Ω
      STP1 (A36-27) - Body ground P (1), B (2) - Body ground Stop light switch input Stop light switch ON → OFF (Brake pedal depressed → released) 8 to 14 V → Below 1.5 V
      BZ (A36-30) - Body ground R - Body ground Buzzer output Engine switch on (IG), when buzzer not sounding 6 to 10 V
      +BS (A36-31) - Body ground L - Body ground Solenoid relay power supply Always 10 to 14 V
      GND1 (A36-32) - Body ground W-B - Body ground Skid control ECU ground Always Below 1 →
      IG1 (A36-46) - Body ground P - Body ground IG1 power supply Engine switch on (IG) 10 to 14 V
      (1) with dynamic radar cruise control
      (2) without dynamic radar cruise control
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