ELECTRONICALLY CONTROLLED BRAKE SYSTEM TERMINALS OF ECU


  1. TERMINALS OF ECU

    A003ZUNE02
    Text in Illustration
    *a

    Component without harness connected

    (Skid Control ECU)

    		 - -
    Terminal No. (Symbol) Terminal Description
    1 (MRI1) Motor power supply input 1
    2 (MRI2) Motor power supply input 2
    3 (STP0) Stop light control relay output
    4 (TS) Sensor check switch input
    5 (FR-) Front speed sensor RH (-) signal input
    6 (STP2) Stop light control relay input
    7 (RL-) Rear speed sensor LH (-) signal input
    8 - (Not used)
    9 (RR-) Rear speed sensor RH (-) signal input
    10 (HZRI) Hazard warning switch input
    11 (SP1) Speed sensor signal output
    12 (IG2) IG2 power source input
    13 (BZ)*1 Skid control buzzer output
    14 (BI) +B power source input
    15 (BS) Solenoid power supply input
    16 (IG1) IG1 power source input
    17 - (Not used)
    18 (FR+) Front speed sensor RH (+) power supply output
    19 (CTY) Courtesy switch input
    20 (RL+) Rear speed sensor LH (+) power supply output
    21 (EXO)*2 Stop light control relay output
    22 (RR+) Rear speed sensor RH (+) power supply output
    23 (GND6) Skid control ECU ground 6
    24 (GND5) Skid control ECU ground 5
    25 (GND4) Skid control ECU ground 4
    26 (GND3) Skid control ECU ground 3
    27 (GND2) Skid control ECU ground 2
    28 (GND) Skid control ECU ground
    29 (MRO1) Motor power supply output 1
    30 (MRO2) Motor power supply output 2
    31 (FL+) Front speed sensor LH (+) power supply output
    32 (FL-) Front speed sensor LH (-) signal input
    33 (STP) Stop light switch input
    34 (CA2L) CAN communication line 2 (L)
    35 (CA2H) CAN communication line 2 (H)
    36 (LBL) Brake fluid level warning switch input
    37 (CA1H) CAN communication line 1 (H)
    38 (CA1L) CAN communication line 1 (L)
    39 (VCSK) Stroke sensor power supply output
    40 (SKS2) Stroke sensor signal input 2
    41 (SKG) Stroke sensor ground
    42 (SKS) Stroke sensor signal input

    *1: w/ Dynamic Radar Cruise Control System

    *2: w/ Emergency Brake Signal

  2. TERMINAL INSPECTION


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

      A003WN8E04
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Skid Control ECU)

      		 - -

      Tech Tips

      Voltage cannot be measured with the connector connected to the skid control ECU as the connector is watertight.

      Standard
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A61-1 (MRI1) - Body ground B - Body ground Motor power supply input 1 Always 11 to 14 V
      A61-2 (MRI2) - Body ground R - Body ground Motor power supply input 2 Always 11 to 14 V
      A61-3 (STP0) - Body ground Y - Body ground Stop light control relay output Always 11 to 14 V
      A61-6 (STP2) - Body ground BE - Body ground Stop light control relay input

      Stop light switch ON → OFF

      (Brake pedal depressed → released)

      		 11 to 14 V → Below 1.5 V
      A61-10 (HZRI) - Body ground SB - Body ground Hazard warning switch input Hazard warning switch ON → OFF Below 1 Ω → 10 kΩ or higher
      A61-12 (IG2) - Body ground BE - Body ground IG2 power source input Power switch on (IG) 11 to 14 V
      A61-13 (BZ) - Body ground*1 BR - Body ground Skid control buzzer output Power switch on (IG), buzzer not sounding 11 to 14 V
      A61-14 (BI) - Body ground W - Body ground +B power source input Always 11 to 14 V
      A61-15 (BS) - Body ground B - Body ground Solenoid power supply input Always 11 to 14 V
      A61-16 (IG1) - Body ground B - Body ground IG1 power source input Power switch on (IG) 11 to 14 V
      A61-19 (CTY) - Body ground V - Body ground Courtesy switch input Driver door close → open 11 to 14 V → Below 1.5 V
      A61-21 (EXO) - Body ground*2 BE - Body ground Stop light control relay output

      Stop light switch ON → OFF

      (Brake pedal depressed → released)

      		 11 to 14 V → Below 1.5 V
      A61-23 (GND6) - Body ground W-B - Body ground Skid control ECU ground 6 Always Below 1 Ω
      A61-24 (GND5) - Body ground W-B - Body ground Skid control ECU ground 5 Always Below 1 Ω
      A61-25 (GND4) - Body ground W-B - Body ground Skid control ECU ground 4 Always Below 1 Ω
      A61-26 (GND3) - Body ground W-B - Body ground Skid control ECU ground 3 Always Below 1 Ω
      A61-27 (GND2) - Body ground W-B - Body ground Skid control ECU ground 2 Always Below 1 Ω
      A61-28 (GND) - Body ground W - Body ground Skid control ECU ground Always Below 1 Ω
      A61-33 (STP) - Body ground L - Body ground Stop light switch input

      Stop light switch ON → OFF

      (Brake pedal depressed → released)

      		 11 to 14 V → Below 1.5 V
      A61-36 (LBL) - Body ground P - Body ground Brake fluid level warning switch input Brake fluid level warning switch OFF → ON 1.84 to 2.16 kΩ → Below 1 Ω

      *1: w/ Dynamic Radar Cruise Control System

      *2: w/ Emergency Brake Signal