Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. With the scan tool, read Instrument Panel Cluster (IPC) DTCs and record on the repair order.
2. With the scan tool, erase DTCs.
3. Turn the ignition on and wait at least 20 seconds.
4. With the scan tool, read IPC DTCs.
  Did the DTC return?
  
  Yes
  - Go To 2
  No
  - Perform the TESTING FOR AN INTERMITTENT CONDITION procedure. Refer to TESTING FOR AN INTERMITTENT CONDITION .
CHECK THE BODY CONTROL MODULE (BCM) FOR LIN BUS DTCS
1. With the scan tool, read BCM DTCs and record on the repair order.
  Are there any LIN BUS DTCs set in the BCM?
  
  Yes
  - Repair the DTC(s) set in the BCM and retest. Refer to DTC TROUBLESHOOTING .
  No
  - Go To 3
CHECK DTCS AFTER REPLACING THE STEERING WHEEL SWITCH (SWS)
1. Turn the ignition off.
2. Replace the Steering Wheel Switch.
3. Turn the ignition on.
4. With the scan tool, erase IPC DTCs.
5. Turn the ignition on and wait at least 20 seconds.
6. With the scan tool, read IPC DTCs.
  Did the DTC return?
  
  Yes
  - Go To 4
  No
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  - Test Complete.
CHECK RELATED WIRING AND HARNESS CONNECTIONS
1. Turn the ignition off.
2. Check the related component and module power supply and ground circuits.
3. Disconnect the M harness connector(s).
4. Disconnect all related in-line harness connections (if equipped).
5. Disconnect the related component harness connectors.
6. 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.
  - Perform a terminal drag test on each connector terminal to verify proper terminal tension.
  Repair any conditions that are found.
7. Reconnect all harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
8. Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
9. Reconnect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
10. With the scan tool, erase DTCs.
11. Using the recorded information along with the When Monitored and Set Conditions, operate the vehicle within the conditions that set the DTC.
12. With the scan tool, read M DTCs.
  Did the DTC return?
  
  Yes
  - Replace the Instrument Panel Cluster (IPC) in accordance with the Service Information. Refer to REMOVAL AND INSTALLATION .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  - Test complete.