ELECTRIC PARKING BRAKE SYSTEM TERMINALS OF ECU


  1. CHECK PARKING BRAKE ECU ASSEMBLY

    A01QBCNC07
    *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
      U29-3 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      U29-8 (+B) - Body ground W - Body ground Electric parking brake motor power supply Engine switch off 11 to 14 V
      U30-1 (CA2L) - U30-9 (CA2H) W - B CAN communication line Engine switch off 54 to 69 Ω
      U30-2 (BECU) - Body ground V - Body ground Parking brake ECU power supply Engine switch off 11 to 14 V
      U30-4 (IG) - Body ground B - Body ground IG power supply Engine switch on (IG) 11 to 14 V
    3. Connect the parking brake ECU assembly connectors.

      A01QBPQC05
      *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
      U29-1 (M-) - Body ground L - Body ground Electric parking brake motor

      Engine switch on (IG)

      Electric parking brake not operating

      4.5 to 6.8 V
      U29-2 (M+) - Body ground G - Body ground Electric parking brake motor

      Engine switch on (IG)

      Electric parking brake not operating

      4.5 to 6.8 V
      U29-6 (LPA) - Body ground L - Body ground AUTO indicator light output

      Engine switch on (IG)

      AUTO indicator light off

      11 to 14 V
      U29-7 (TX) - Body ground GR - Body ground Combination meter communication signal 20 seconds after engine switch turned off 9 to 14 V
      U30-5 (AUTO) - Body ground P - Body ground AUTO switch (Parking light switch assembly)

      Engine switch on (IG)

      AUTO switch (Parking light switch assembly) pushed

      Below 1 V

      Engine switch on (IG)

      AUTO switch (Parking light switch assembly) off

      11 to 14 V
      U30-6 (TSN2) - Body ground W - Body ground Tension sensor 2 Engine switch on (IG) 0.5 to 4.5 V
      U30-7 (VT) - Body ground R - Body ground Tension sensor power supply Engine switch on (IG) 4.75 to 5.25 V
      U30-8 (TSEN) - Body ground B - Body ground Tension sensor 1 Engine switch on (IG) 0.5 to 4.5 V
      U30-10 (SG) - Body ground - - Always Below 1 Ω
      U30-12 (LCK1) - Body ground W - Body ground Electric parking brake switch lock 1

      Engine switch on (IG)

      Electric parking brake switch off

      1.8 to 3.3 V

      Engine switch on (IG)

      Electric parking brake switch lock (push)

      2.2 to 3.7 V
      U30-13 (REL2) - Body ground Y - Body ground Electric parking brake switch release 2

      Engine switch on (IG)

      Electric parking brake switch off

      6.5 to 10 V

      Engine switch on (IG)

      Electric parking brake switch release (pull)

      2.8 to 5 V
      U30-14 (TGND) - Body ground G - Body ground Tension sensor ground Always Below 1 Ω
      U30-15 (LCK2) - Body ground R - Body ground Electric parking brake switch lock 2

      Engine switch on (IG)

      Electric parking brake switch off

      6.5 to 10 V

      Engine switch on (IG)

      Electric parking brake switch lock (push)

      2.8 to 5 V
      U30-16 (REL1) - Body ground P - Body ground Electric parking brake switch release 1

      Engine switch on (IG)

      Electric parking brake switch off

      6.5 to 10 V

      Engine switch on (IG)

      Electric parking brake switch release (pull)

      2.8 to 5 V