Diagnostic Test

READ AND RECORD DTCS AND ENVIRONMENTAL DATA - ERASE DTCS AND CHECK FOR THE DTC TO RETURN
1. With the scan tool, read DTCs in all Electronic Control Units (ECU's) and record on the repair order.
2. For future reference, with the scan tool, run and save a vehicle Scan Report and all related recorded data.
3. With the scan tool, erase all DTCs.
4. Turn the ignition off for a minimum of 10.0 seconds.
5. Turn the ignition on.
6. Using the When Monitored and Set Conditions above and recorded data, operate the vehicle in the conditions that set the DTC.
7. With the scan tool, read DTCs.
  Did the DTC return?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to; INTERMITTENT CONDITION .
VERIFY THAT THE BCM 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: BODY CONTROL MODULE (BCM) - 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 BCM 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: BODY CONTROL MODULE (BCM) - DIAGNOSTIC CODE INDEX .
  No
  - Go To 6
CHECK THE STOP/START SWITCH WIRING FOR AN OPEN OR SHORT
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
REPLACE THE STOP/START SWITCH AND RETEST FOR DTC
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.
  Did the DTC return?
  
  Yes
  - Go To 6
  No
  - Replacing the Stop/Start Switch repaired the fault.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to: POWERTRAIN VERIFICATION TEST .
CHECK RELATED BCM AND COMPONENT CONNECTIONS
1. Disconnect all BCM harness connectors.
2. Disconnect all related in-line harness connections (if equipped).
3. Disconnect the related component harness connectors.
4. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions.
  - Proper connector installation.
  - Damaged connector locks.
  - Corrosion.
  - Other signs of water intrusion.
  - Weather seal damage (if equipped).
  - Bent terminals.
  - Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
  - Terminals that have been pushed back into the connector cavity.
  - Check for spread terminals and verify proper terminal tension.
  Repair any conditions that are found.
5. Reconnect all BCM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
6. Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
7. Reconnect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
8. With the scan tool, erase DTCs.
9. Test drive or operate the vehicle in accordance with the when monitored and set conditions.
10. With the scan tool, read DTCs.
  Did the DTC return?
  
  Yes
  - Replace and program the Body Control Module (BCM) in accordance with the Service Information. Refer to: BODY CONTROL MODULE (BCM), REMOVAL AND INSTALLATION .
  - Perform the BODY VERIFICATION TEST. Refer to: BODY VERIFICATION TEST .
  No
  - The wiring or poor connection problem has been repaired.
  - Perform the BODY VERIFICATION TEST. Refer to: BODY VERIFICATION TEST .