Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. With a scan tool, select read DTCs.
  Is the DTC active?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
VERIFY THAT THE BODY CONTROL MODULE IS CAPABLE OF SETTING STOP/START SWITCH FAULTS
1. Check the BCM fault code list to verify that the BCM has the capability to set DTCs against the Stop/Start Switch. Refer to DIAGNOSTIC CODE INDEX .
  Are there any Stop/Start Switch faults listed in the DTC list for the BCM?
  
  Yes
  - Go To 3
  No
  - Go To 4
CHECK THE BODY CONTROL MODULE FOR STOP/START SWITCH FAULTS
1. With the scan tool, read DTCs in the BCM.
  Is the BCM setting any DTCs against the Stop/Start Switch?
  
  Yes
  - Perform the diagnostic procedure in the BCM. Refer to DIAGNOSTIC CODE INDEX .
  No
  - Replace and program the Body Control Module (BCM) in accordance with the Service Information. Refer to MODULE, BODY CONTROL (BCM), REMOVAL AND INSTALLATION .
CHECK THE AAT SENSOR WIRING HARNESS FOR A CIRCUIT FAULT
1. Turn the ignition off.
2. Disconnect the Stop/Start Switch harness connector.
3. Disconnect the appropriate BCM harness connector.
4. Check the Stop/Start Switch wiring:
  - for an open condition.
  - for a short to voltage.
  - for a short to ground.
  - for a short to each other.
  Were any problems found with the wiring?
  
  Yes
  - Perform the appropriate repair of the wiring.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 5
CHECK THE STOP/START SWITCH FOR PROPER OPERATION
1. Replace the Stop/Start Switch in accordance with the Service Information.
2. Reconnect all harness connectors.
3. Turn the ignition on.
4. With the scan tool, read DTCs.
  Is the DTC still active?
  
  Yes
  - Replace the Body Control Module in accordance with the Service Information. Refer to MODULE, BODY CONTROL (BCM), REMOVAL AND INSTALLATION .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Repair is complete.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .