ELECTRIC PARKING BRAKE SYSTEM TERMINALS OF ECU


  1. CHECK SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)

    B004LJWC02
    *a Front view of wire harness connector (to Skid Control ECU (Brake Actuator Assembly)) - -

    1. Disconnect the A34 skid control ECU (brake actuator assembly) connectors.

    2. Measure the voltage and resistance according to the value (s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A34-1 (+BM) - Body ground B Parking brake power supply Always 11 to 14 V
      A34-30 (+BS) - Body ground G Parking brake motor power supply Always 11 to 14 V
      A34-36 (IG1) - Body ground B IG power supply Ignition switch ON 11 to 14 V
      A34-46 (GND1) - Body ground W-B Ground Always Below 1 Ω
      A34-14 (GND2) - Body ground W-B Ground Always Below 1 Ω
      A34-2 (MRR+) - Body ground Y Parking brake motor RH (parking brake actuator assembly RH) (+) - -
      A34-3 (MRR-) - Body ground L Parking brake motor RH (parking brake actuator assembly RH) (-) - -
      A34-13 (MRL+) - Body ground G Parking brake motor LH (parking brake actuator assembly LH) (+) - -
      A34-12 (MRL-) - Body ground W Parking brake motor LH (parking brake actuator assembly LH) (-) - -
      A34-35 (POL) - Body ground L Electric parking brake switch indicator light - -
      A34-31 (SWI1) - Body ground P Electric parking brake switch (electric parking brake switch assembly) - -
      A34-15 (SWI2) - Body ground W Electric parking brake switch (electric parking brake switch assembly) - -
      A34-32 (SWO1) - Body ground SB Electric parking brake switch (electric parking brake switch assembly) - -
      A34-16 (SWO2) - Body ground V Electric parking brake switch (electric parking brake switch assembly) - -
      A34-5 (CANH) - Body ground Y CAN communication line H - -
      A34-19 (CANL) - Body ground W CAN communication line L - -