ELECTRIC PARKING BRAKE SYSTEM TERMINALS OF ECU


  1. CHECK ELECTRIC PARKING BRAKE ECU

    A01H19GE01

    1. Disconnect the S46 and S48 ECU connectors.

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      S46-3 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      S46-8 (+B) - S46-3 (GND1) R - W-B +B power supply Power switch OFF 11 to 14 V
      S48-1 (CA2L) - S48-9 (CA2H) W - B CAN communication line Power switch OFF 108 to 132 Ω
      S48-2 (BECU) - S46-3 (GND1) BE - W-B Power supply Power switch OFF 11 to 14 V
      S48-4 (IG) - S46-3 (GND1) G - W-B IG power supply Power switch ON (IG) 11 to 14 V

    3. Connect the S46 and S48 ECU connectors.

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      S46-1 (M-) - S46-3 (GND1) GR - W-B Electric parking brake motor

      Power switch ON (IG)

      Electric parking brake not operating

      		 11 to 14 V
      S46-2 (M+) - S46-3 (GND1) L - W-B Electric parking brake motor

      Power switch ON (IG)

      Electric parking brake not operating

      		 11 to 14 V
      S46-6 (LPA) - S46-3 (GND1) G - W-B AUTO switch light output

      Power switch ON (IG)

      AUTO switch OFF

      		 11 to 14 V
      S46-7 (TX) - S46-3 (GND1) L - W-B Diagnosis communication signal 20 seconds after power switch turned OFF 9 to 14 V
      S48-1 (CA2L) - S48-9 (CA2H) W - B CAN communication line Power switch OFF 54 to 69 Ω
      S48-5 (AUTO) - S46-3 (GND1) R - W-B AUTO switch

      Power switch ON (IG)

      AUTO switch ON

      		 Below 1 V

      Power switch ON (IG)

      AUTO switch OFF

      		 11 to 14 V
      S48-6 (TSN2) - S46-3 (GND1) G - W-B Tension sensor Power switch ON (IG) 0.5 to 4.5 V
      S48-7 (VT) - S46-3 (GND1) R - W-B Tension sensor power supply Power switch ON (IG) 4.75 to 5.25 V
      S48-8 (TSEN) - S46-3 (GND1) W - W-B Tension sensor Power switch ON (IG) 0.5 to 4.5 V
      S48-10 (SG) - S46-3 (GND1) Shielded - W-B - Always Below 1 Ω
      S48-12 (LCK1) - S46-3 (GND1) G - W-B 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)

      		 1.8 to 3.3 V
      S48-13 (REL2) - S46-3 (GND1) B - W-B Electric parking brake switch release 2

      Power switch ON (IG)

      Electric parking brake switch OFF

      		 6.5 to 10.0 V

      Power switch ON (IG)

      Electric parking brake switch release (pull)

      		 2.8 to 5.0 V
      S48-14 (TGND) - S46-3 (GND1) B - W-B Tension sensor ground Always Below 1 Ω
      S48-15 (LCK2) - S46-3 (GND1) R - W-B Electric parking brake switch lock 2

      Power switch ON (IG)

      Electric parking brake switch OFF

      		 6.5 to 10.0 V

      Power switch ON (IG)

      Electric parking brake switch lock (push)

      		 2.8 to 5.0 V
      S48-16 (REL1) - S46-3 (GND1) W - W-B Electric parking brake switch release 1

      Power switch ON (IG)

      Electric parking brake switch OFF

      		 6.5 to 10.0 V

      Power switch ON (IG)

      Electric parking brake switch release (pull)

      		 2.8 to 5.0 V