VEHICLE STABILITY CONTROL SYSTEM TERMINALS OF ECU

  1. TERMINALS OF ECU

    C160258C07

    *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.

      C160261C06

      *a

      Front view of wire harness connector

      (to Skid Control ECU [Brake Actuator Assembly])

      -

      -
      Tip:

      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