Diagnostic Test

READ AND RECORD DTCS AND ENVIRONMENTAL DATA
NOTE:
To erase this DTC from the module's internal memory, the Body Control Module (BCM) must detect an ignition OFF/ON cycle, along with the normal operation of the system associated with this DTC.
1. Turn the ignition on.
2. With the scan tool, read DTCs in all Electronic Control Units (ECU's) and record on the repair order.
3. With the scan tool, run a vehicle Scan Report, or record the Environmental Data related to the DTCs.
4. With the scan tool, read Body Control Module (BCM) DTCs.
  Is the DTC Active?
  
  Yes
  - Go To 2
  No
  - Perform the appropriate INTERMITTENT CONDITION diagnostic procedure. Refer to: TESTING FOR AN INTERMITTENT CONDITION .
CHECK THE TRANSMISSION CONTROL MODULE (TCM) FOR AN INTERNAL SHORT
NOTE:
Additional DTCs may set when the harness connector is disconnected and the ignition is positioned on. After all repairs are completed, make sure to erase any additional DTCs that may have set.
1. Turn the ignition off.
2. Disconnect the TCM harness connector containing the (F1) Ignition Off/Run/Start Control Output circuit.
3. Turn the ignition on.
4. With the scan tool, read BCM DTCs.
  Is the DTC Active?
  
  Yes
  - Go To 3
  No
  - Go To 4
DISCONNECT THE BCM HARNESS CONNECTOR(S) AND CHECK THE (F1) IGNITION OFF/RUN/START CONTROL OUTPUT CIRCUIT FOR A SHORT TO GROUND
1. The ignition must be off when checking a circuit for continuity to ground.
2. Disconnect all Electronic Control Unit (ECU) harness connectors containing the circuit being tested. Note: Use the wiring diagram as a guide to follow the path of the circuit.
3. Connect the negative lead of the DVOM to a known good ground.
4. Connect the positive lead of the DVOM to the circuit being tested at the ECU or component harness connector and check for continuity between the circuit and ground.
  NOTE:
  When probing a circuit at any harness connector, always use an appropriate probing tool to prevent any possible damage to the harness connector terminals.
  
  NOTE:
  There should be no continuity between ground and the circuit being tested.
  
  Is there continuity between ground and the circuit being tested?
  
  Yes
  - Repair the circuit for a short to ground. Use the wiring diagram as a guide to trace the circuit and look for any in-line connectors to help isolate the location of the short.
  - Perform the BODY VERIFICATION TEST. Refer to: BODY VERIFICATION TEST .
  No
  - Go To 5
DISCONNECT RELATED TCM HARNESS CONNECTIONS AND INSPECT FOR PROBLEMS
1. Disconnect all TCM 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.
  - Perform a terminal drag test on each connector terminal to verify proper terminal tension.
  Repair any conditions that are found.
5. Connect all TCM 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. Using the recorded Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
10. With the scan tool, read BCM DTCs.
  Did the DTC return?
  
  Yes
  - Replace the Transmission Control Module (TCM) in accordance with the Service Information. Refer to: MODULE, TRANSMISSION CONTROL (TCM), 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.
DISCONNECT RELATED BCM HARNESS CONNECTIONS AND INSPECT FOR PROBLEMS
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.
  - Perform a terminal drag test on each connector terminal to verify proper terminal tension.
  Repair any conditions that are found.
5. Connect all BCM 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. Using the recorded Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
10. With the scan tool, read BCM DTCs.
  Did the DTC return?
  
  Yes
  - Replace 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
  - Perform the BODY VERIFICATION TEST. Refer to: BODY VERIFICATION TEST .
  - Test complete.