ELECTRIC PARKING BRAKE SYSTEM TERMINALS OF ECU


  1. CHECK PARKING BRAKE ECU ASSEMBLY

    A01WPGSE02
    Text in Illustration
    *a

    Front view of wire harness connector

    (to Parking Brake ECU Assembly)

    		 - -

    1. Disconnect the parking brake ECU assembly connectors.

    2. Measure the voltage and resistance according to the values in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      K52-3 (GND1) - Body ground W-B Ground Always Below 1 Ω
      K52-8 (+B) - Body ground R Electric parking brake motor power supply Engine switch off 11 to 14 V
      K53-1 (CA2L) - K53-9 (CA2H) B - LG CAN communication line Engine switch off 54 to 69 Ω
      K53-2 (BECU) - Body ground L Parking brake ECU power supply Engine switch off 11 to 14 V
      K53-4 (IG) - Body ground B IG power supply Engine switch on (IG) 11 to 14 V

    3. Connect the parking brake ECU assembly connectors.

      A01WQDDE03
      Text in Illustration
      *a

      Component with harness connected

      (Parking Brake ECU Assembly)

      		 - -

    4. Measure the voltage and resistance according to the values in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      K52-1 (M-) - Body ground L Electric parking brake motor

      Engine switch on (IG)

      Electric parking brake not operating

      		 4.5 to 6.8 V
      K52-2 (M+) - Body ground R Electric parking brake motor

      Engine switch on (IG)

      Electric parking brake not operating

      		 4.5 to 6.8 V
      K52-6 (POL) - Body ground W Electric parking brake switch indicator light

      Engine switch on (IG)

      Electric parking brake switch indicator light off

      		 11 to 14 V
      K52-7 (TX) - Body ground V Combination meter communication signal 20 seconds after engine switch turned off 9 to 14 V
      K53-6 (TSN2) - Body ground W Tension sensor 2 Engine switch on (IG) 0.5 to 4.5 V
      K53-7 (VT) - Body ground R Tension sensor power supply Engine switch on (IG) 4.75 to 5.25 V
      K53-8 (TSEN) - Body ground B Tension sensor 1 Engine switch on (IG) 0.5 to 4.5 V
      K53-10 (SG) - Body ground - - Always Below 1 Ω
      K53-12 (LCK1) - Body ground B Electric parking brake switch assembly lock 1

      Engine switch on (IG)

      Electric parking brake switch assembly off (released)

      		 1.8 to 3.3 V

      Engine switch on (IG)

      Electric parking brake switch assembly pulled and held to lock side

      		 2.2 to 3.7 V
      K53-13 (REL2) - Body ground GR Electric parking brake switch assembly release 2

      Engine switch on (IG)

      Electric parking brake switch assembly off (released)

      		 6.5 to 10 V

      Engine switch on (IG)

      Electric parking brake switch assembly pushed and held to release side

      		 2.8 to 5 V
      K53-14 (TGND) - Body ground G Tension sensor ground Always Below 1 Ω
      K53-15 (LCK2) - Body ground R Electric parking brake switch assembly lock 2

      Engine switch on (IG)

      Electric parking brake switch assembly off (released)

      		 6.5 to 10 V

      Engine switch on (IG)

      Electric parking brake switch assembly pulled and held to lock side

      		 2.8 to 5 V
      K53-16 (REL1) - Body ground G Electric parking brake switch assembly release 1

      Engine switch on (IG)

      Electric parking brake switch assembly off (released)

      		 6.5 to 10 V

      Engine switch on (IG)

      Electric parking brake switch assembly pushed and held to release side

      		 2.8 to 5 V