Pinpoint Test

1. Using a scan tool, perform the IPC self-test.

Are any DTCs recorded? 

1. Yes: REFER to DTC Chart: Instrument Panel Cluster (IPC) .
2. No: GO to 2  .

1. Ignition ON.
2. Apply the parking brake while monitoring the brake warning indicator.

Does the brake warning indicator illuminate with the parking brake applied? 

1. Yes: GO to  8  .
2. No: GO to 3  .

1. Ignition ON.
2. Using a scan tool, view the IPC PIDs  .
3. Select the IPC brake warning indicator (PBA_LMP) PID. Command the brake warning indicator on and observe the brake warning indicator.

Does the brake warning indicator illuminate when commanded on? 

1. Yes: GO to 4  .
2. No: INSTALL a new IPC. REFER to Instrument Panel Cluster (IPC) .

1. Using a scan tool, view the BCM PIDs  .
2. Select the BCM parking brake (PARK_BRK_SW) PID. Monitor the parking brake PID while applying the parking brake.

Does the PID agree with the parking brake position? 

1. Yes: GO to  11  .
2. No: GO to 5  .

1. Disconnect: Parking Brake Position Switch.
2. Connect a fused jumper wire:

   Parking Brake Position Switch			Parking Brake Position Switch
   C2015			C2015
   Pin	Circuit	Measurement / Action	Pin	Circuit
   1	CMT25 (WH/VT)		2	GD233 (BK)

Does the brake warning indicator illuminate? 

1. Yes: REMOVE the jumper wire. INSTALL a new parking brake position switch.
2. No: REMOVE the jumper wire. GO to 6  .

1. Ignition OFF.
2. Measure:

   Parking Brake Position Switch			Ground
   C2015			Ground
   Pin	Circuit	Measurement / Action	Pin	Circuit
   2	GD233 (BK)		-	Ground

Is the resistance less than 3 ohms? 

1. Yes: GO to 7  .
2. No: REPAIR the circuit.

1. Disconnect: BCM C2280C.
2. Measure:

   Parking Brake Position Switch			BCM
   C2015			C2280C
   Pin	Circuit	Measurement / Action	Pin	Circuit
   1	CMC25 (WH/VT)		7	CMC25 (WH/VT)

Is the resistance less than 3 ohms? 

1. Yes: GO to  11  .
2. No: REPAIR the circuit.

1. Ignition OFF.
2. Disconnect: Brake Fluid Level Switch.
3. Ignition ON.

Does the brake warning indicator illuminate? 

1. Yes: GO to  10  .
2. No: GO to 9  .

1. Ignition OFF.
2. Disconnect: BCM C2280F.
3. Measure:

   Brake Fluid Level Switch			Brake Fluid Level Switch
   C124			C124
   Pin	Circuit	Measurement / Action	Pin	Circuit
   2	CMC19 (GY/VT)		3	RMC19 (YE/GY)

Is the resistance greater than 10, 000 ohms? 

1. Yes: GO to  11  .
2. No: REPAIR the circuits.

1. Ignition OFF.
2. Measure:

   Brake Fluid Level Switch			Ground
   C124			Ground
   Pin	Circuit	Measurement / Action	Pin	Circuit
   1	GD120 (BK/GN)		-	Ground

Is the resistance less than 3 ohms? 

1. Yes: INSTALL a new brake fluid level switch.
2. No: REPAIR the circuit.

1. Ignition OFF.
2. Disconnect and inspect all BCM connectors.
3. Repair:
   • corrosion (install new connector or terminals - clean module pins)
   • damaged or bent pins - install new terminals/pins
   • pushed-out pins - install newpins as necessary
4. Reconnect the BCM connectors. Make sure they seat and latch correctly.
5. Operate the system and determine if the concern is still present.

Is the concern still present? 

1. Yes: CHECK OASIS  for any applicable TSBs  . If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs  address this concern, INSTALL a new BCM:

   REFER to BODY CONTROL MODULE (BCM) - WITH INTELLIGENT ACCESS (IA) , or

   REFER to BODY CONTROL MODULE (BCM) - WITHOUT INTELLIGENT ACCESS (IA) .

2. No: The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.