VEHICLE STABILITY CONTROL SYSTEM TERMINALS OF ECU


  1. TERMINALS OF ECU

    B003P1XC03
    *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 (EXI)*3 A.D.D. position switch (Differential motor actuator assembly) signal input
    4 - (Not used)
    5 (EXI4)*3 L4 detection switch (Transfer shift actuator assembly) input
    6 - (Not used)
    7 (STP2) Stop light switch assembly input
    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 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 (TMVC)*1, *2 Neutral position switch power supply
    21 (TME2)*1, *2 Neutral position switch signal input
    22 (CANH) CAN communication line H
    23 - (Not used)
    24 (TS) Sensor check input
    25 (GND1) Skid control ECU (Brake actuator assembly) ground
    26 (STPO) Stop light switch assembly output
    27 (HDCS)*1 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 (TMN)*1, *2 Neutral position switch signal output
    33 (CSW) VSC OFF switch input
    34 - (Not used)
    35 (STP) Stop light switch assembly input
    36 - (Not used)
    37 - (Not used)
    38 (+BS) Solenoid relay power supply

    • *1: w/ Downhill Assist Control

    • *2: for Manual Transmission

    • *3: for 4WD

  2. TERMINAL INSPECTION


    1. Disconnect the A4 connector and measure the voltage or resistance on the wire harness side.

      B003QUVC09
      *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
      A4-1 (GND2) - Body ground W-B - Body ground Pump motor ground Always Below 1 Ω
      A4-3 (EXI) - Body ground*3 W - Body ground*4 A.D.D. position switch (Differential motor actuator assembly) signal input

      • Ignition switch ON

      • 4WD control switch (Transfer position switch) set to H2

      		 11 to 14 V
      L - Body ground*5
      A4-5 (EXI4) - Body ground*3 G - Body ground*4 L4 detection switch (Transfer shift actuator assembly) input

      • Ignition switch ON

      • 4WD control switch (Transfer position switch) not set to L4

      		 11 to 14 V
      SB - Body ground*5
      A4-7 (STP2) - 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
      A4-12 (IG1) - Body ground L - Body ground*4 ECU power supply input Ignition switch ON 11 to 14 V
      V - Body ground*5
      A4-13 (BM) - Body ground R - Body ground Motor relay power supply Always 11 to 14 V
      A4-14 (SP1) - Body ground Y - Body ground Speed signal output for speedometer Ignition switch ON 11 to 14 V
      A4-20 (TMVC) - Body ground*1, *2 B - Body ground Neutral position switch power supply

      • Ignition switch ON

      • Engine stopped

      		 4.5 to 5.5 V
      A4-25 (GND1) - Body ground W-B - Body ground Skid control ECU (Brake actuator assembly) ground Always Below 1 Ω
      A4-26 (STPO) - Body ground P - Body ground Stop light switch assembly output Ignition switch ON 11 to 14 V
      A4-27 (HDCS) - Body ground*1 SB - Body ground Downhill assist control switch input Downhill assist control switch on → off Below 1 Ω → 10 kΩ or higher
      A4-32 (TMN) - A4-21 (TME2)*1, *2 P - R Neutral position switch signal

      • Ignition switch ON

      • Shift lever in neutral

      		 2.7 to 4.3 V

      • Ignition switch ON

      • Shift lever in any other than neutral

      		 0.7 to 1.9 V
      A4-33 (CSW) - Body ground GR - Body ground VSC OFF switch input VSC OFF switch pressed and held → released Below 1 Ω → 10 kΩ or higher
      A4-35 (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
      A4-38 (+BS) - Body ground B - Body ground Solenoid relay power supply Always 11 to 14 V

      • *1: w/ Downhill Assist Control

      • *2: for Manual Transmission

      • *3: for 4WD

      • *4: for 1GD-FTV RHD and 2GD-FTV RHD

      • *5: except 1GD-FTV RHD and 2GD-FTV RHD