VEHICLE STABILITY CONTROL SYSTEM TERMINALS OF ECU


  1. TERMINALS OF ECU

    A01QP9HC03
    *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 - (Not used)
    4 - (Not used)
    5 (STP2) Stop light switch assembly input
    6 - (Not used)
    7 - (Not used)
    8 - (Not used)
    9 - (Not used)
    10 (CANL) CAN communication line L
    11 (EXI3)*1 Back-up light switch assembly input
    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 - (Not used)
    24 - (Not used)
    25 (GND1) Skid control ECU (Brake actuator assembly) ground
    26 (STPO) Stop light control relay output
    27 (HDCS)*2 Downhill assist control switch input
    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 (Telltale light 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: for Manual Transaxle

    • *2: w/ Downhill Assist Control

  2. TERMINAL INSPECTION


    1. Disconnect the A80 skid control ECU (brake actuator assembly) connector and measure the voltage or resistance on the wire harness side.

      A01QOB8C20
      *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
      A80-1 (GND2) - Body ground W-B - Body ground Pump motor ground Always Below 1 Ω
      A80-5 (STP2) - Body ground LG - Body ground Stop light signal input

      Stop light switch assembly on → off

      (Brake pedal depressed → released)

      		 8 to 14 V → Below 1.5 V
      A80-11 (EXI3) - Body ground*1 R - Body ground Back-up light switch assembly input Shift lever not in R → Shift lever in R Below 1.5 V → 8 to 14 V
      A80-12 (IG1) - Body ground L - Body ground ECU power supply input Ignition switch ON 10.5 to 16 V*3
      11 to 14 V*4
      A80-13 (BM) - Body ground B - Body ground Motor relay power supply Always 11 to 14 V
      A80-14 (SP1) - Body ground V - Body ground Speed signal output for speedometer Ignition switch ON 11 to 14 V
      A80-25 (GND1) - Body ground W-B - Body ground Skid control ECU (Brake actuator assembly) ground Always Below 1 Ω
      A80-26 (STPO) - Body ground W - Body ground Stop light control relay output Ignition switch ON 11 to 14 V
      A4-27 (HDCS) - Body ground*2 Y - Body ground Downhill assist control switch input Downhill assist control switch on → off Below 1 Ω → 10 kΩ or higher
      A80-33 (CSW) - Body ground L - Body ground VSC OFF switch (Telltale light assembly) input VSC OFF switch (telltale light assembly) pressed and held → released Below 1 Ω → 10 kΩ or higher
      A80-35 (STP) - Body ground L - 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
      A80-38 (+BS) - Body ground W - Body ground Solenoid relay power supply Always 11 to 14 V

      • *1: for Manual Transaxle

      • *2: w/ Downhill Assist Control

      • *3: w/ Stop and Start System

      • *4: w/o Stop and Start System