Diagnostic Test

CHECK FOR POWERTRAIN CONTROL MODULE (PCM) DTCs
NOTE:
Make sure the battery is fully charged before proceeding.
1. With the scan tool, read the active PCM DTCs.
  Are there any battery or charging system DTCs present?
  
  Yes
  - Perform the appropriate PCM DTC diagnostic procedure. Refer to DTC INDEX .
  No
  - Go To 2
CHECK FOR AN ACTIVE DTC
1. With the scan tool, record and erase the DTCs.
2. Start the engine.
3. Allow the engine to idle for two minutes.
4. With the scan tool, read the DTCs.
  Is the DTC active?
  
  Yes
  - Go To 3
  No
  - Perform the TESTING FOR AN INTERMITTENT CONDITION procedure. Refer to TESTING FOR AN INTERMITTENT CONDITION .
CHECK THE (A937) FUSED B(+) CIRCUIT FOR AN OPEN OR HIGH RESISTANCE
1. Turn the ignition off.
2. Disconnect the Integrated Center Stack (ICS) harness connector.
3. Turn the ignition on.
4. With a 12-volt test light connected to ground, check the (A937) Fused B(+) circuit in the ICS harness connector.
  NOTE:
  The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.
  
  Does the test light illuminate brightly?
  
  Yes
  - Go To 4
  No
  - Repair the open or high resistance in the (A937) Fused B(+) circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (Z911) GROUND CIRCUIT FOR AN OPEN OR HIGH RESISTANCE
1. With a 12-volt test light connected to 12 volts, check the (Z911) Ground circuit in the ICS harness connector.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 5
  No
  - Repair the open or high resistance in the (Z911) Ground circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK RELATED HARNESS CONNECTIONS
1. Disconnect all ICS 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. Connect all ICS harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
6. Connect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
7. Connect 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 ICS DTCs.
  Is the same DTC active?
  
  Yes
  - Replace the Integrated Center Stack (ICS) in accordance with the Service Information. Refer to MODULE, INTEGRATED CENTER STACK (ICSM), REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Repairing the wiring harness or connections corrected the problem.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .