ELECTRIC PARKING BRAKE SYSTEM TERMINALS OF ECU

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Front view of wire harness connector (to Parking Brake ECU Assembly)

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CHECK 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
   L76-3 (GND1) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
   L76-8 (+B) - Body ground	G - Body ground	Electric parking brake motor power supply	Power switch off	11 to 14 V
   L77-1 (CA2L) - L77-9 (CA2H)	W - L	CAN communication line	Power switch off	54 to 69 Ω
   L77-2 (BECU) - Body ground	L - Body ground	Parking brake ECU power supply	Power switch off	11 to 14 V
   L77-4 (IG) - Body ground	GR - Body ground	IG power supply	Power switch on (IG)	11 to 14 V

3. 

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   Component with harness connected (Parking Brake ECU Assembly)

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   Connect the parking brake ECU assembly connectors.

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

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   L76-1 (M-) - Body ground	L - Body ground	Electric parking brake motor	Power switch on (IG) Electric parking brake not operating	4.5 to 6.8 V
   L76-2 (M+) - Body ground	G - Body ground	Electric parking brake motor	Power switch on (IG) Electric parking brake not operating	4.5 to 6.8 V
   L76-7 (TX) - Body ground	GR - Body ground	Combination meter communication signal	20 seconds after power switch turned off	9 to 14 V
   L77-6 (TSN2) - Body ground	W - Body ground	Tension sensor 2	Power switch on (IG)	0.5 to 4.5 V
   L77-7 (VT) - Body ground	B - Body ground	Tension sensor power supply	Power switch on (IG)	4.75 to 5.25 V
   L77-8 (TSEN) - Body ground	R - Body ground	Tension sensor 1	Power switch on (IG)	0.5 to 4.5 V
   L77-10 (SG) - Body ground	-	-	Always	Below 1 Ω
   L77-12 (LCK1) - Body ground	W - Body ground	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
   L77-13 (REL2) - Body ground	SB - Body ground	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
   L77-14 (TGND) - Body ground	G - Body ground	Tension sensor ground	Always	Below 1 Ω
   L77-15 (LCK2) - Body ground	BE - Body ground	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
   L77-16 (REL1) - Body ground	LG - Body ground	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