VEHICLE STABILITY CONTROL SYSTEM TERMINALS OF ECU


  1. TERMINALS OF ECU

    B002CYTE05
    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) No. 2 integration relay output (for emergency brake signal) (stop light blinking)
    3 (PKB) Brake hold switch (Satellite switch set) input
    4 - (Not used)
    5 (STP2) No. 2 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 supplyt
    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) No. 2 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) No. 2 integration relay input
    36 (CA2H) CAN communication line H
    37 (CA2L) CAN communication line L
    38 (+BS) Solenoid relay power supply

  2. TERMINAL INSPECTION


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

      B002ES0C01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Skid Control ECU [Brake Actuator Assembly])

      		 - -

      Tech Tips

      Voltage cannot be measured with the connectors connected to the skid control ECU (brake actuator assembly) as the connectors are watertight.

      Standard
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A52-1 (GND2) - Body ground W-B - Body ground Pump motor ground Always Below 1 Ω
      A52-2 (EXO) - Body ground P - Body ground No. 2 integration relay output (for emergency brake signal) Engine switch on (IG) 11 to 14 V
      A52-3 (PKB) - Body ground SB - Body ground Brake hold switch (Satellite switch set) input Brake hold switch (satellite switch set) pressed and held → released Below 1 Ω → 10 kΩ or higher
      A52-5 (STP2) - Body ground GR - Body ground No. 2 integration relay input Brake pedal depressed → released 8 to 14 V → Below 1.5 V
      A52-12 (IG1) - Body ground L - Body ground ECU power supply input Engine switch on (IG) 11 to 14 V
      A52-13 (BM) - Body ground W - Body ground Motor relay power supply Always 11 to 14 V
      A52-14 (SP1) - Body ground LG - Body ground Speed signal output for speedometer Engine switch on (IG) 11 to 14 V
      A52-25 (GND1) - Body ground W-B - Body ground Skid control ECU (Brake actuator assembly) ground Always Below 1 Ω
      A52-26 (STPO) - Body ground GR - Body ground No. 2 integration relay output Engine switch on (IG) 11 to 14 V
      A52-33 (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
      A52-35 (STP) - Body ground R*1, V*2 - Body ground No. 2 integration relay input Stop light switch assembly on → off (Brake pedal depressed → released) 8 to 14 V → Below 1.5 V
      A52-38 (+BS) - Body ground R - Body ground Solenoid relay power supply Always 11 to 14 V

      *1: for LHD

      *2: for RHD