Pinpoint Test

1. Ignition ON.
2. Operate the stoplamps.

Do the stoplamps and high mounted stoplamp operate correctly? 

1. Yes: GO to 2  .
2. No: REFER to SYMPTOM CHART: STOPLAMPS .

1. Using a scan tool, view Powertrain - Cruise Control PIDs  .
2. Monitor the powertrain PIDs  BOO1 (stoplamp switch) and BOO2 (cruise control deactivator switch) while applying and releasing the brake pedal.

   Brake Pedal Position	BOO1 PID	BOO2 PID
   Released	Off	Off
   Applied lightly	On	Off
   Applied firmly	On	On

Do the PID values agree with the brake pedal position? 

1. Yes: GO to  8.
2. No: For an incorrect BOO1 PID value, GO to 3  .

   For an incorrect BOO2 PID value, GO to  4.

1. Ignition OFF.
2. Disconnect: PCM C175B (3.5L).
3. Disconnect: PCM C1381B (2.0L GTDI).
4. Ignition ON.
5. For 3.5L, while applying the brake pedal, measure:

   PCM			Ground
   C175B			Ground
   Pin	Circuit	Measurement / Action	Pin	Circuit
   13	CCB08 (VT/WH)		-	Ground

6. For 2.0L GTDI, while applying the brake pedal, measure:

   PCM			Ground
   C1381B			Ground
   Pin	Circuit	Measurement / Action	Pin	Circuit
   30	CCB08 (VT/WH)		-	Ground

Is the voltage greater than 11 volts? 

1. Yes: GO to  8.
2. No: REPAIR the circuit.

1. Ignition OFF.
2. Disconnect: PCM C175B (3.5L).
3. Disconnect: PCM C1381B (2.0L GTDI).
4. For 3.5L, while firmly applying and releasing the brake pedal, measure:

   PCM			Ground
   C175B			Ground
   Pin	Circuit	Measurement / Action	Pin	Circuit
   46	CES09 (VT/OG)		-	Ground

5. For 2.0L GTDI, while firmly applying and releasing the brake pedal, measure:

   PCM			Ground
   C1381B			Ground
   Pin	Circuit	Measurement / Action	Pin	Circuit
   16	CES09 (VT/OG)		-	Ground

Is the resistance less than 3 ohms with the brake pedal released, and greater than 10, 000 ohms with the brake pedal firmly applied? 

1. Yes: GO to  8.
2. No: GO to 5  .

1. Disconnect: Stoplamp Switch.
2. Measure:

   Stoplamp Switch			Ground
   C278			Ground
   Pin	Circuit	Measurement / Action	Pin	Circuit
   3	GD113 (BK/YE)		-	Ground

Is the resistance less than 3 ohms? 

1. Yes: GO to 6  .
2. No: REPAIR the circuit.

1. Measure:

   Stoplamp Switch			Ground
   C278			Ground
   Pin	Circuit	Measurement / Action	Pin	Circuit
   2	CES09 (VT/OG)		-	Ground

Is the resistance greater than 10, 000 ohms? 

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

1. Connect a fused jumper wire:

   Stoplamp Switch			Stoplamp Switch
   C278			C278
   Pin	Circuit	Measurement / Action	Pin	Circuit
   3	GD113 (BK/YE)		2	CES09 (VT/OG)

2. For 3.5L, measure:

   PCM			Ground
   C175B			Ground
   Pin	Circuit	Measurement / Action	Pin	Circuit
   46	CES09 (VT/OG)		-	Ground

3. For 2.0L GTDI, measure:

   PCM			Ground
   C1381B			Ground
   Pin	Circuit	Measurement / Action	Pin	Circuit
   16	CES09 (VT/OG)		-	Ground

Is the resistance less than 3 ohms? 

1. Yes: INSTALL a new stoplamp switch. REFER to STOPLAMP SWITCH .
2. No: REPAIR the circuit.

1. Disconnect and inspect all the PCM connectors.
2. Repair:
   • corrosion (install new connector or terminals - clean module pins)
   • damaged pins - install new terminals/pins
   • pushed-out pins - install new pins as necessary
3. Reconnect the PCM connectors. Make sure they seat and latch correctly.
4. 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 PCM.

   REFER to POWERTRAIN CONTROL MODULE (PCM) - 2.0L GTDI or POWERTRAIN CONTROL MODULE (PCM) - 3.5L TI-VCT .

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.