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Terminals Of Ecu

  1. Terminal of ECU 
    Fig 1: Identifying Connector Terminals Skid Control ECU
    G05841851Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINAL DESCRIPTION CHART

    Terminal No. (Symbols) Terminal Description
    1 (GND2) Pump motor ground
    2 (BM) Motor relay input
    3 (FR+) Front wheel speed RH signal (+) input
    4 (FL-) Front wheel speed LH signal (-) input
    5 (RR+) Rear wheel speed RH signal (+) input
    6 (RL-) Rear wheel speed LH signal (-) input
    7 (FSW+) Brake pedal load sensing switch input
    11 (CANH) CAN communication line H
    12 (SP1) Speed signal output for combination meter
    13 (D/G) Diagnosis tester communication line
    14 (MRF) Fail safe motor relay output
    15 (MR) Motor relay output
    16 (STPO) (1) Stop light control relay output
    17 (FR-) Front wheel speed RH signal (-) input
    18 (FL+) Front wheel speed LH signal (+) input
    19 (RR-) Rear wheel speed RH signal (-) input
    20 (RL+) Rear wheel speed LH signal (+) input
    21 (STP2) (1) Stop light control relay input
    24 (TS) Test mode (sensor check) input
    25 (CANL) CAN communication line L
    27 (STP1) Stop light switch input
    28 (PKB) Parking brake switch input
    30 (BZ) Skid control buzzer output
    31 (+BS) Solenoid relay power supply
    32 (GND1) Skid control ECU ground
    39 (RRO) Rear wheel speed RH signal output
    40 (RLO) Rear wheel speed LH signal output
    42 (WFSE) WFSE input
    43 (CSW) VSC OFF switch input
    45 (R+) Power supply for motor relay
    46 (IG1) IG1 power supply
    (1) with Dynamic Laser Cruise Control System
  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 (Front View)
      G05841852Courtesy 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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      S1-1 (GND2) - Body ground W-L - Body ground Pump motor ground Ignition switch off Below 1 Ω
      S1-7 (FSW+) - Body ground LG - Body ground Brake pedal load sensing switch input Stop light switch ON → OFF (Brake pedal depressed → released) 0.9 to 1.1 kΩ → 192 to 234 Ω
      S1-21 (STP2) (1) - Body ground GR - Body ground Stop light control relay input Stop light switch ON → OFF (Brake pedal depressed → released) 8 to 16 V → Below 1.5 V
      S1-27 (STP1) - Body ground W - Body ground Stop light switch input Stop light switch ON → OFF (Brake pedal depressed → released) 8 to 16 V → Below 1.5 V
      S1-28 (PKB) - Body ground LG - Body ground Parking brake switch input Ignition switch ON, parking brake switch ON → OFF Below 1 Ω → 10 kΩ or higher
      S1-30 (BZ) - Body ground O - Body ground Skid control buzzer output Ignition switch ON, when buzzer not sounding 6 to 10 V
      S1-31 (+BS) - Body ground L - Body ground Solenoid relay power supply Always 10 to 14 V
      S1-32 (GND1) - Body ground W-B - Body ground Skid control ECU ground Always Below 1 Ω
      S1-43 (CSW) - Body ground B - Body ground VSC OFF switch input VSC OFF switch held ON → OFF (Not pressed) Below 1 Ω → 10 kΩ or higher
      S1-46 (IG1) - Body ground P - Body ground IG1 power supply Ignition switch ON 10 to 14 V
      (1) with Dynamic Laser Cruise Control System
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