VEHICLE STABILITY CONTROL SYSTEM TERMINALS OF ECU


  1. TERMINALS OF ECU

    A01RAYBC01
    *a

    Component without harness connected

    (Skid Control ECU (Brake Actuator Assembly))

    		 - -
    Terminal No. (Symbol) Terminal Description
    1 (GND1) Skid control ECU (brake actuator assembly) ground
    2 -
    3 -
    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
    8 - (Not used)
    9 (CSW) VSC OFF switch (combination switch assembly) input
    10 - (Not used)
    11 (STP) Stop light switch assembly input
    12 -
    13 -
    14 (+BS) Solenoid relay power supply
    15 -
    16 - (Not used)
    17 - (Not used)
    18 (SP1) Speed signal output for speedometer
    19 (RR-) Rear wheel speed RH (-) signal input
    20 (RR+) Rear wheel speed RH (+) power supply output
    21 (FL-) Front wheel speed LH (-) signal input
    22 (FL+) Front wheel speed LH (+) power supply output
    23 -
    24 - (Not used)
    25 - (Not used)
    26 - (Not used)
    27 (CANH) CAN communication line H
    28 (FSW+) Brake pedal load sensing switch (brake pedal support assembly) input
    29 - (Not used)
    30 (GND2) Pump motor ground
    31 -
    32 (STPO) Stop light control relay output
    33 - (Not used)
    34 (EXO)* Emergency brake signal output
    35 (PKB) Brake hold switch (electric parking brake switch assembly) input
    36 -
    37 (STP2) Stop light signal input
    38 - (Not used)
    39 -
    40 -
    41 - (Not used)
    42 - (Not used)
    43 (CANL) CAN communication line L
    44 - (Not used)
    45 (IG1) ECU power supply input
    46 (BM) Motor relay power supply

    *: w/ Emergency Brake Signal

  2. TERMINAL INSPECTION


    1. Disconnect the A41 connector and measure the voltage or resistance on the wire harness side.

      A01RCKKC02
      *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
      A41-1 (GND1) - Body ground W-B - Body ground Skid control ECU (brake actuator assembly) ground Always Below 1 Ω
      A41-9 (CSW) - Body ground P - 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
      A41-11 (STP) - Body ground B - 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
      A41-14 (+BS) - Body ground L - Body ground Solenoid relay power supply Always 11 to 14 V
      A41-18 (SP1) - Body ground BE - Body ground Speed signal output for speedometer Engine switch on (IG) 11 to 14 V
      A41-28 (FSW+) - Body ground W - Body ground Brake pedal load sensing switch (brake pedal support assembly) input Brake pedal depressed → released 950 to 1050 Ω → 203 to 223 Ω
      A41-30 (GND2) - Body ground W-B - Body ground Pump motor ground Always Below 1 Ω
      A41-32 (STPO) - Body ground B - Body ground Semiconductor power integration ECU output Engine switch on (IG) 11 to 14 V
      A41-34 (EXO) - Body ground*1 G - Body ground Semiconductor power integration ECU output (for emergency brake signal)

      Stop light switch ON → OFF

      (Brake pedal depressed → released)

      		 11 to 14 V → Below 1.5 V
      A41-35 (PKB) - Body ground R - Body ground Brake hold switch (electric parking brake switch assembly) input Brake hold switch (electric parking brake switch assembly) pressed and held → released Below 1 Ω → 10 kΩ or higher
      A41-37 (STP2) - Body ground P - Body ground Stop light signal input Brake pedal depressed → released 8 to 14 V → Below 1.5 V
      A41-45 (IG1) - Body ground B*2, V*3 - Body ground ECU power supply input Engine switch on (IG) 10.5 to 16 V
      A41-46 (BM) - Body ground R - Body ground Motor relay power supply Always 11 to 14 V

      *1: w/ Emergency Brake Signal

      *2: w/ Stop and Start System

      *3: w/o Stop and Start System