VEHICLE STABILITY CONTROL SYSTEM TERMINALS OF ECU

SST
A00YUPH 09843-18040 Diagnosis Check Wire No. 2

  1. TERMINALS OF ECU

    A00YVU2C07
    *a

    Component without harness connected

    (Skid Control ECU [Brake Actuator Assembly])

    		 - -
    Terminal No. (Symbol) Terminal Description
    1 (GND1) Skid control ECU ground
    2 (STP) Stop light switch input
    3 - (Not used)
    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 - (Not used)
    10 - (Not used)
    11 (SP1) Speed signal output for speedometer
    12 (+BS) Solenoid relay power supply
    13 (GND2) Pump motor ground
    14 (CANL) CAN communication line L
    15 - (Not used)
    16 (RR-) Rear wheel speed RH (-) signal input
    17 (RR+) Rear wheel speed RH (+) power supply output
    18 (FL-) Front wheel speed LH (-) signal input
    19 (FL+) Front wheel speed LH (+) power supply output
    20 - (Not used)
    21 - (Not used)
    22 (STP2)*1 Stop light control relay (STOP LP) input
    23 - (Not used)
    24 (BM) Motor relay power supply
    25 (CANH) CAN communication line H
    26 - (Not used)
    27 - (Not used)
    28 - (Not used)
    29 (HDCS)*2 Downhill assist control switch input
    30 (CSW) VSC OFF switch input
    31 (STPO)*1 Stop light control relay (STOP LP) output
    32 - (Not used)
    33 - (Not used)
    34 (IG1) ECU power supply

    • *1: w/ Stop Light Control Relay

    • *2: w/ Downhill Assist Control

  2. TERMINAL INSPECTION


    1. Disconnect the A64 connector and measure the voltage or resistance on the wire harness side.

      A00YUXNC06
      *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
      A64-1 (GND1) - Body ground W-B - Body ground Skid control ECU ground Always Below 1 Ω
      A64-2 (STP) - Body ground L - Body ground Stop light switch input Brake pedal depressed → released 8 to 14 V → Below 1.5 V
      A64-12 (+BS) - Body ground W - Body ground Solenoid relay power supply Always 11 to 14 V
      A64-13 (GND2) - Body ground W-B - Body ground Pump motor ground Always Below 1 Ω
      A64-22 (STP2)*1 - Body ground L - Body ground Stop light control relay input Brake pedal depressed → released 8 to 14 V → Below 1.5 V
      A64-24 (BM) - Body ground B - Body ground Motor relay power supply Always 11 to 14 V
      A64-25 (CANH) - A64-14 (CANL) R - W HIGH-level CAN bus wire - LOW-level CAN bus wire Cable disconnected from negative (-) battery terminal 54 to 69 Ω
      A64-29 (HDCS)*2 - Body ground Y - Body ground Downhill assist control switch input Downhill assist control switch on → off Below 1 Ω → 10 kΩ or higher
      A64-30 (CSW) - Body ground L - Body ground VSC OFF switch input VSC OFF switch held ON → OFF (Not pressed) Below 1 Ω → 10 kΩ or higher
      A64-31 (STPO)*1 - Body ground W - Body ground Stop light control relay output Ignition switch ON 11 to 14 V
      A64-34 (IG1) - Body ground L - Body ground ECU power supply Ignition switch ON 11 to 14 V

      • *1: w/ Stop Light Control Relay

      • *2: w/ Downhill Assist Control