VEHICLE STABILITY CONTROL SYSTEM TERMINALS OF ECU


  1. TERMINALS OF ECU

    A01W31EE08
    Text in Illustration
    *a

    Component without harness connected

    (Skid Control ECU (Brake Actuator Assembly))

    		 - -
    Terminal No. (Symbol) Terminal Description
    1 (GND2) Pump motor ground
    2 (EXO)*1 No. 1 integration relay output (for emergency brake signal)
    3 - (Not used)
    4 - (Not used)
    5 (STP2)*1, 2 No. 1 integration relay input
    6 - (Not used)
    7 - (Not used)
    8 - (Not used)
    9 - (Not used)
    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 - (Not used)
    21 - (Not used)
    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)*1, 2 No. 1 integration 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 - (Not used)
    33 (CSW) VSC OFF switch (integration control and panel assembly) input
    34 - (Not used)
    35 (STP) Stop light switch assembly input
    36 - (Not used)
    37 - (Not used)
    38 (+BS) Solenoid relay power supply

    *1: w/ Emergency Brake Signal

    *2: w/ Dynamic Radar Cruise Control

  2. TERMINAL INSPECTION


    1. Disconnect the A40 connector and measure the voltage or resistance on the wire harness side.

      A01W2O7E03
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Skid Control ECU (Brake Actuator Assembly))

      		 - -

      Tech Tips

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

      Standard
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A40-1 (GND2) - Body ground W-B - Body ground Pump motor ground Always Below 1 Ω
      A40-2 (EXO) - Body ground*1 V - Body ground No. 1 integration relay output (for emergency brake signal)

      Stop light switch ON → OFF

      (Brake pedal depressed → released)

      		 8 to 14 V → Below 1.5 V
      A40-5 (STP2) - Body ground*1, 2 P - Body ground No. 1 integration relay input Brake pedal depressed → released 8 to 14 V → Below 1.5 V
      A40-12 (IG1) - Body ground V - Body ground ECU power supply input Engine switch on (IG) 10.5 to 16 V
      A40-13 (BM) - Body ground G - Body ground Motor relay power supply Always 11 to 14 V
      A40-14 (SP1) - Body ground L - Body ground Speed signal output for speedometer Engine switch on (IG) 11 to 14 V
      A40-23 (FSW+) - Body ground L - Body ground Brake pedal load sensing switch (brake pedal support assembly) input Brake pedal load sensing switch off → on (Brake pedal depressed → released) 950 to 1050 Ω → 203 to 223 Ω
      A40-25 (GND1) - Body ground W-B - Body ground Skid control ECU (brake actuator assembly) ground Always Below 1 Ω
      A40-26 (STPO) - Body ground*1, 2 G - Body ground No. 1 integration relay output Engine switch on (IG) 11 to 14 V
      A40-33 (CSW) - Body ground R - Body ground VSC OFF switch (integration control and panel assembly) input VSC OFF switch (integration control and panel assembly) pressed and held → released Below 1 Ω → 10 kΩ or higher
      A40-35 (STP) - Body ground P - 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
      A40-38 (+BS) - Body ground L - Body ground Solenoid relay power supply Engine switch on (IG) 11 to 14 V

      *1: w/ Emergency Brake Signal

      *2: w/ Dynamic Radar Cruise Control