LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2011 >> IS 350 Base, RWD >> Repair and Diagnosis >> Brakes >> Traction Control >> Vehicle Stability Control System (Diagnostics - Introduction) >> Vehicle Stability Control System >> Terminals Of Ecu >> Terminals Of Ecu
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Terminals Of Ecu

  1. TERMINALS OF ECU 
    Fig 1: Identifying ECU Connector Terminals
    GTY124285Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Terminal No. (Symbol) Terminal Description
    1 (GND1) Skid control ECU ground
    2 (STP1) Stop light switch input
    4 (RL-) Rear wheel speed LH (-) signal input
    5 (RL+) Rear wheel speed LH (+) power supply output
    6 (FR-) Front wheel speed RH (-) signal input
    7 (FR+) Front wheel speed RH (+) power supply output
    9 (FLO)*1 Front wheel speed LH signal output
    10 (FRO)*1 Front wheel speed RH signal output
    11 (SP1) Speed signal output for speedometer
    12 (+BS) Solenoid relay power supply
    13 (GND2) Pump motor ground
    14 (CANL) CAN communication line L
    16 (RR-) Rear wheel speed RH (-) signal input
    17 (RR+) Rear wheel speed RH (+) power supply output
    18 (FL-) Front wheel speed LH (-) signal input
    19 (FL+) Front wheel speed LH (+) power supply output
    22 (STP2)*2 Stop light control relay input
    24 (+BM) Motor relay power supply
    25 (CANH) CAN communication line H
    27 (FSW+) Brake pedal load sensing switch input
    29 (PKB) Parking brake switch input
    30 (CSW) VSC OFF switch input
    31 (STPO)*2 Stop light control relay output
    33 (TS) Sensor check input
    34 (IG1) ECU power supply

    *1: w/ AFS

    *2: for Automatic Transmission

  2. TERMINAL INSPECTION 
    1. Disconnect the connectors and measure the voltage or resistance on the wire harness side.
      Fig 2: Identifying Front View Of Wire Harness Connector
      GTY140785Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT: 

      Voltage cannot be measured with the connectors connected to the skid control ECU as the connectors are watertight.

      STANDARD

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A58-1 (GND1) - Body ground W-B - Body ground Skid control ECU ground Always Below 1 Ω
      A58-2 (STP1) - Body ground R-B - Body ground Stop light switch input Stop light switch ON → OFF
      (Brake pedal depressed → released)      		 8 to 14 V
      → Below 1.5 V
      A58-12 (+BS) - Body ground BR - Body ground Solenoid relay power supply Always 11 to 14 V
      A58-13 (GND2) - Body ground W-B - Body ground Pump motor ground Always Below 1 Ω
      A58-22 (STP2)*1 - Body ground R-W - Body ground Stop light control relay input Stop light switch ON → OFF
      (Brake pedal depressed → released)      		 8 to 14 V
      → Below 1.5 V
      A58-24 (+BM) - Body ground W - Body ground Motor relay power supply Always 11 to 14 V
      A58-27 (FSW+) - Body ground G-O - Body ground Brake pedal load sensing switch input Brake pedal load sensing switch OFF → ON
      (Brake pedal depressed → released)      		 950 to 1050 Ω → 203 to 223 Ω
      A58-29 (PKB) - Body ground Y - Body ground Parking brake switch input Engine switch on (IG), parking brake switch OFF → ON Below 1 Ω → 10 kΩ or higher
      A58-30 (CSW) - Body ground L-Y - Body ground VSC OFF switch input VSC OFF switch held ON → OFF (Released) Below 25 Ω → 10 kΩ or higher
      A58-31 (STPO)*1 - Body ground L - Body ground Stop light control relay output Engine switch on (IG) 11 to 14 V
      A58-34 (IG1) - Body ground B-W - Body ground ECU power supply Engine switch on (IG) 11 to 14 V

      *1: for automatic transmission

scientia non olet · About LEMON Manuals