Diagnostic Test

CHECK FOR ANY SERVICE BULLETINS OR PCM SOFTWARE UPDATES
1. Check for any applicable Service Bulletins or Flash updates related to the DTC.
  Are there any applicable Service Bulletins or Flash updates?
  
  Yes
  - Perform the applicable repair.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 2
CHECK FOR OTHER DTCS
1. With the scan tool, read DTCs in all Electronic Control Units (ECUs) 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.
  Are there any PCR Control Relay Control circuit or Charging System DTCs present?
  
  Yes
  - Perform the applicable diagnostic procedure(s). Refer to DIAGNOSTIC CODE INDEX .
  No
  - Go To 3
CHECK THE FUSES AND PDC CONNECTIONS
1. Check the Fuse(s) that feed the PCM Fused B+ circuit.
2. Check the Auxiliary Battery cable connection at the PDC for a proper connection.
  Were any issues found with the fuses or connections?
  
  Yes
  - Make the necessary repairs.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 4
CHECK AUXILIARY BATTERY POSITIVE AND NEGATIVE CABLE CONNECTIONS
1. Check the for a proper connection between the Battery posts and cable ends at the Auxiliary Battery.
  NOTE:
  There should be no voltage drop between the posts and cable ends.
  
  Is there a good connector between the posts and cable ends?
  
  Yes
  - Go To 5
  No
  - Clean the Battery Cables and posts and retest.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
CHECK AUXILIARY BATTERY NEGATIVE CABLE GROUND
1. Check the Auxiliary Battery Negative Cable for a proper ground at the ground location.
  Is the Negative Battery Cable grounded properly?
  
  Yes
  - Go To 6
  No
  - Repair the Auxiliary Battery Negative Cable ground.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
CHECK THE AUXILIARY BATTERY STATE OF CHARGE
1. Disconnect the Negative Cable from both Batteries.
2. Use the (special tool #GR8-1220KIT-CHRY, AGM Battery Tester/Charger Station) or equivalent to load test the Auxiliary Battery.
  Did the Auxiliary Battery pass the load test?
  
  Yes
  - Go To 7
  No
  - Recharge or replace the Auxiliary Battery.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
CHECK (A209) FUSED B+ SUPPLY VOLTAGE TO THE PCM
1. Disconnect the PCM C1 harness connector.
2. Connect the(special tool #10436, Adapter, GPEC Diagnostic) to the PCM harness connector. Reconnect the PCM C1 harness connector in-line with the GPEC Adaptor connected in-line.
3. Turn the ignition on.
4. Measure the voltage on the (A209) Fused B+ circuit at the GPEC Adaptor.
5. Measure the voltage of the Auxiliary Battery.
  Is the voltage on the (A209) Fused B+ circuit within 0.2 volts of the Auxiliary Battery?
  
  Yes
  - Go To 8
  No
  - Repair the (A209) Fused B+ circuit for high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
CHECK RELATED PCM AND COMPONENT CONNECTIONS
1. Perform any Service Bulletins that apply.
2. Disconnect all PCM harness connectors.
3. Disconnect all related in-line harness connections (if equipped).
4. Disconnect the related component harness connectors.
5. 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.
6. Reconnect all PCM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
7. Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
8. Reconnect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
9. With the scan tool, erase DTCs.
10. Test drive or operate the vehicle in accordance with the when monitored and set conditions.
11. With the scan tool, read DTCs.
  Did the DTC return?
  
  Yes
  - Replace and program the Powertrain Control Module (PCM) in accordance with the Service Information. Refer to MODULE, POWERTRAIN CONTROL (PCM), REMOVAL AND INSTALLATION .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - The wiring or poor connection problem has been repaired.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .