ELECTRIC PARKING BRAKE SYSTEM TERMINALS OF ECU


  1. CHECK PARKING BRAKE ECU ASSEMBLY

    A001OY3C09
    *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 value (s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      M70-7 (+B) - Body ground W Parking brake motor RH (parking brake actuator assembly RH) power supply Power switch off 11 to 14 V
      M70-9 (GND1) - Body ground W-B Ground Always Below 1 Ω
      M70-12 (+B2) - Body ground P Parking brake motor LH (parking brake actuator assembly LH) power supply Power switch off 11 to 14 V
      M71-3 (BECU) - Body ground B Parking brake ECU assembly power supply Power switch off 11 to 14 V
      M71-5 (IG) - Body ground SB IG power supply Power switch on (IG) 11 to 14 V

    3. Connect the parking brake ECU assembly connectors.

      A001RCCC08
      *a

      Component with harness connected

      (Parking Brake ECU Assembly)

      		 - -

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      M70-1 (MRR+) - Body ground SB Parking brake motor RH (parking brake actuator assembly RH) (+)

      • Power switch on (IG)

      • Electric parking brake system not operating

      		 3.9 to 6.2 V
      M70-3 (MRR-) - Body ground P Parking brake motor RH (parking brake actuator assembly RH) (-)

      • Power switch on (IG)

      • Electric parking brake system not operating

      		 3.9 to 6.2 V
      M70-4 (MRL+) - Body ground R Parking brake motor LH (parking brake actuator assembly LH) (+)

      • Power switch on (IG)

      • Electric parking brake system not operating

      		 3.9 to 6.2 V
      M70-6 (MRL-) - Body ground L Parking brake motor LH (parking brake actuator assembly LH) (-)

      • Power switch on (IG)

      • Electric parking brake system not operating

      		 3.9 to 6.2 V
      M71-14 (POL) - Body ground R Electric parking brake switch indicator light

      • Power switch on (IG)

      • Electric parking brake switch indicator light off

      		 9 to 14 V
      M71-15 (LCK2) - Body ground W Electric parking brake switch assembly lock 2

      • Power switch on (IG)

      • Electric parking brake switch (electric parking brake switch assembly) not operated

      		 6.5 to 10 V

      • Power switch on (IG)

      • Electric parking brake switch (electric parking brake switch assembly) pulled and held to lock side

      		 2.8 to 5 V
      M71-16 (REL2) - Body ground L Electric parking brake switch assembly release 2

      • Power switch on (IG)

      • Electric parking brake switch (electric parking brake switch assembly) not operated

      		 6.5 to 10 V

      • Power switch on (IG)

      • Electric parking brake switch (electric parking brake switch assembly) pushed and held to release side

      		 2.8 to 5 V
      M71-19 (REL1) - Body ground G Electric parking brake switch assembly release 1

      • Power switch on (IG)

      • Electric parking brake switch (electric parking brake switch assembly) not operated

      		 6.5 to 10 V

      • Power switch on (IG)

      • Electric parking brake switch (electric parking brake switch assembly) pushed and held to release side

      		 2.8 to 5 V
      M71-20 (LCK1) - Body ground B Electric parking brake switch assembly lock 1

      • Power switch on (IG)

      • Electric parking brake switch (electric parking brake switch assembly) not operated

      		 1.8 to 3.3 V

      • Power switch on (IG)

      • Electric parking brake switch (electric parking brake switch assembly) pulled and held to lock side

      		 2.2 to 3.7 V