ANTI-LOCK BRAKE SYSTEM(for Type B) TERMINALS OF ECU

  1. TERMINALS OF ECU

    C277407C01

    *a

    Component without harness connected

    (Skid Control ECU (Brake Actuator Assembly))

    -

    -

    Terminal No. (Symbol)

    Terminal Description

    1 (GND1)

    Skid control ECU ground

    2

    - (Not used)

    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

    - (Not used)

    12 (+BS)

    ABS 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 (SP1)

    Speed signal output for speedometer

    23

    - (Not used)

    24 (+BM)

    ABS motor relay power supply

    25 (CANH)

    CAN communication line H

    26

    - (Not used)

    27

    - (Not used)

    28 (STP)

    Stop light switch assembly input

    29

    - (Not used)

    30

    - (Not used)

    31

    - (Not used)

    32

    - (Not used)

    33

    - (Not used)

    34 (IG1)

    IG1 power source input

  2. TERMINAL INSPECTION

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

      C277403C03

      *a

      Front view of wire harness connector

      (to Skid Control ECU (Brake Actuator Assembly))

      -

      -
      Tip:

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

      Table 1. Standard

      Terminal No. (Symbol)

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      A124-1 (GND1) - Body ground

      W-B - Body ground

      Skid control ECU ground

      Always

      Below 1 Ω

      A124-12 (+BS) - Body ground

      W - Body ground

      ABS solenoid relay power supply

      Always

      11 to 14 V

      A124-13 (GND2) - Body ground

      W-B - Body ground

      Pump motor ground

      Always

      Below 1 Ω

      A124-22 (SP1) - Body ground

      B - Body ground

      Speed signal output for speedometer

      Ignition switch ON

      11 to 14 V

      A124-24 (+BM) - Body ground

      L - Body ground

      ABS motor relay power supply

      Always

      11 to 14 V

      A124-28 (STP) - Body ground

      L - Body ground

      Stop light switch assembly input

      Stop light switch ON → OFF

      (Brake pedal depressed → released)

      11 to 14 V → Below 1.5 V

      A124-34 (IG1) - Body ground

      L - Body ground

      IG1 power source input

      Ignition switch ON

      11 to 14 V