VEHICLE STABILITY CONTROL SYSTEM TERMINALS OF ECU


  1. TERMINALS OF ECU

    B006M0UC03
    *a

    Component without harness connected

    (Skid Control ECU (Brake Actuator Assembly))

    		 - -
    Terminal No. (Symbol) Terminal Description
    1 (GND2) Pump motor ground
    2 - (Not used)
    3 (PKB) Brake hold switch (combination switch assembly) input
    4 - (Not used)
    5 (STP2) Stop light signal input
    6 - (Not used)
    7 (VSM2)* Atmospheric pressure sensor (vacuum sensor assembly) power supply output
    8 - (Not used)
    9 (VSG2)* Atmospheric pressure sensor (vacuum sensor assembly) ground
    10 (CANL) CAN communication line L
    11 - (Not used)
    12 (IG1) ECU power supply input
    13 (BM) Motor relay power supply
    14 (SP1) Speed signal output for speedometer
    15 (RR-) Rear wheel speed RH (-) signal input
    16 (RR+) Rear wheel speed RH (+) power supply output
    17 (FL-) Front wheel speed LH (-) signal input
    18 (FL+) Front wheel speed LH (+) power supply output
    19 - (Not used)
    20 (VSM)* Vacuum booster pressure sensor (vacuum sensor) power supply output
    21 (VSG)* Vacuum booster pressure sensor (vacuum sensor) ground
    22 (CANH) CAN communication line H
    23 (FSW+) Brake pedal load sensing switch (brake pedal support assembly) input
    24 - (Not used)
    25 (GND1) Skid control ECU (brake actuator assembly) ground
    26 (STPO) Stop light control relay output
    27 - (Not used)
    28 (RL-) Rear wheel speed LH (-) signal input
    29 (RL+) Rear wheel speed LH (+) power supply output
    30 (FR-) Front wheel speed RH (-) signal input
    31 (FR+) Front wheel speed RH (+) power supply output
    32 (VSI2)* Atmospheric pressure sensor (vacuum sensor assembly) signal input
    33 (CSW) VSC OFF switch (combination switch assembly) input
    34 (VSI1)* Vacuum booster pressure sensor (vacuum sensor) signal input
    35 (STP) Stop light switch assembly input
    36 - (Not used)
    37 - (Not used)
    38 (+BS) Solenoid relay power supply

    *: for 2AR-FE

  2. TERMINAL INSPECTION


    1. Disconnect the A50 connector and measure the voltage or resistance on the wire harness side.

      B006NJ1C07
      *a

      Front view of wire harness connector

      (to Skid Control ECU (Brake Actuator Assembly))

      		 - -

      Tech Tips

      Voltage cannot be measured with the connector connected to the skid control (brake actuator assembly) as the connector is watertight.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A50-1 (GND2) - Body ground W-B - Body ground Pump motor ground Always Below 1 Ω
      A50-3 (PKB) - Body ground Y - Body ground Brake hold switch (combination switch assembly) input Brake hold switch (combination switch assembly) pressed and held → released Below 1 Ω → 10 kΩ or higher
      A50-5 (STP2) - Body ground BE - Body ground Stop light signal input Brake pedal depressed → released 8 to 14 V → Below 1.5 V
      A50-12 (IG1) - Body ground GR - Body ground ECU power supply input Engine switch on (IG) 10.5 to 16 V
      A50-13 (BM) - Body ground Y - Body ground Motor relay power supply Always 11 to 14 V
      A50-14 (SP1) - Body ground SB - Body ground Speed signal output for speedometer Engine switch on (IG) 11 to 14 V
      A50-23 (FSW+) - Body ground R - Body ground Brake pedal load sensing switch (brake pedal support assembly) input Brake pedal depressed → released 950 to 1050 Ω → 203 to 223 Ω
      A50-25 (GND1) - Body ground W-B - Body ground Skid control ECU (brake actuator assembly) ground Always Below 1 Ω
      A50-26 (STPO) - Body ground Y - Body ground Stop light control relay output Engine switch on (IG) 11 to 14 V
      A50-33 (CSW) - Body ground G - Body ground VSC OFF switch (combination switch assembly) input VSC OFF switch (combination switch assembly) pressed and held → released Below 1 Ω → 10 kΩ or higher
      A50-35 (STP) - Body ground G - Body ground Stop light switch assembly input

      Stop light switch assembly on → off

      (brake pedal depressed → released)

      		 8 to 14 V → Below 1.5 V
      A50-38 (+BS) - Body ground P - Body ground Solenoid relay power supply Always 11 to 14 V