ELECTRIC PARKING BRAKE SYSTEM TERMINALS OF ECU


  1. CHECK PARKING BRAKE ECU ASSEMBLY

    A000QEPE02
    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
      U36-3 (GND1) - Body ground W-B Ground Always Below 1 Ω
      U36-8 (+B) - Body ground B Electric parking brake motor power supply Power switch off 11 to 14 V
      U37-1 (CA2L) - U37-9 (CA2H) W - B CAN communication line Power switch off 54 to 69 Ω
      U37-2 (BECU) - Body ground V Parking brake ECU power supply Power switch off 11 to 14 V
      U37-4 (IG) - Body ground B IG power supply Power switch on (IG) 11 to 14 V

    3. Connect the parking brake ECU assembly connectors.

      A000SKGE02
      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
      U36-1 (M-) - Body ground L Electric parking brake motor

      Power switch on (IG)

      Electric parking brake not operating

      		 4.5 to 6.8 V
      U36-2 (M+) - Body ground G Electric parking brake motor

      Power switch on (IG)

      Electric parking brake not operating

      		 4.5 to 6.8 V
      U36-6 (LPA) - Body ground L AUTO indicator light output

      Power switch on (IG)

      AUTO indicator light off

      		 11 to 14 V
      U36-7 (TX) - Body ground GR Combination meter communication signal 20 seconds after power switch turned off 9 to 14 V
      U37-5 (AUTO) - Body ground P AUTO switch (Parking light switch assembly)

      Power switch on (IG)

      AUTO switch (Parking light switch assembly) pushed

      		 Below 1 V

      Power switch on (IG)

      AUTO switch (Parking light switch assembly) off

      		 11 to 14 V
      U37-6 (TSN2) - Body ground W Tension sensor 2 Power switch on (IG) 0.5 to 4.5 V
      U37-7 (VT) - Body ground R Tension sensor power supply Power switch on (IG) 4.75 to 5.25 V
      U37-8 (TSEN) - Body ground B Tension sensor 1 Power switch on (IG) 0.5 to 4.5 V
      U37-10 (SG) - Body ground - - Always Below 1 Ω
      U37-12 (LCK1) - Body ground W Electric parking brake switch lock 1

      Power switch on (IG)

      Electric parking brake switch off

      		 1.8 to 3.3 V

      Power switch on (IG)

      Electric parking brake switch lock (push)

      		 2.2 to 3.7 V
      U37-13 (REL2) - Body ground Y Electric parking brake switch release 2

      Power switch on (IG)

      Electric parking brake switch off

      		 6.5 to 10 V

      Power switch on (IG)

      Electric parking brake switch release (pull)

      		 2.8 to 5 V
      U37-14 (TGND) - Body ground G Tension sensor ground Always Below 1 Ω
      U37-15 (LCK2) - Body ground R Electric parking brake switch lock 2

      Power switch on (IG)

      Electric parking brake switch off

      		 6.5 to 10 V

      Power switch on (IG)

      Electric parking brake switch lock (push)

      		 2.8 to 5 V
      U37-16 (REL1) - Body ground P Electric parking brake switch release 1

      Power switch on (IG)

      Electric parking brake switch off

      		 6.5 to 10 V

      Power switch on (IG)

      Electric parking brake switch release (pull)

      		 2.8 to 5 V