Pinpoint Test

1. Ignition ON.
2. Using a scan tool, view the PCM PIDs  .
3. Monitor the PCM PID START_KEY.
4. Momentarily turn the key to START and release it.

Does the PID read On when the ignition is in the START position? 

1. Yes:  REFER to Diagnostic Routine A: Engine Does Not Crank (Without Intelligent Access) .
2. No  : GO to 2  .

1. Ignition OFF.
2. Disconnect: BCM C2280B.
3. Disconnect: PCM C175B.
4. With the ignition switch in the START position, measure:

   BCM			Ground
   C2280B			Ground
   Pin	Circuit	Measurement / Action	Pin	Circuit
   47	CDC35 (BU/WH)		-	Ground

Is the voltage greater than 11 volts? 

1. Yes:  GO to  4.
2. No  : GO to 3  .

1. Ignition OFF.
2. Disconnect: Ignition Switch.
3. Measure:

   Ignition Switch			BCM
   C250			C2280B
   Pin	Circuit	Measurement / Action	Pin	Circuit
   7	CDC35 (BU/WH)		47	CDC35 (BU/WH)

Is the resistance less than 3 ohms? 

1. Yes:  INSTALL a new ignition switch. REFER to Ignition Switch .
2. No  : REPAIR the circuit.

1. Disconnect and inspect all BCM connectors.
2. Repair:
   • corrosion (install new connector or terminals - clean module pins)
   • damaged or bent pins - install new terminals/pins
   • pushed-out pins - install new pins as necessary
3. Reconnect the BCM connectors and all previously disconnected exterior system 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 BCM. REFER to BODY CONTROL MODULE (BCM) - WITHOUT INTELLIGENT ACCESS (IA) , or REFER to BODY CONTROL MODULE (BCM) - WITH 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.