Diagnostic Test

VERIFY THE DTC IS ACTIVE
1. Turn the ignition on.
2. With the scan tool, record and erase the DTCs.
3. Cycle the ignition switch from off to on.
4. With the scan tool, read the DTCs.
  Is the DTC active at this time?
  
  Yes
  - Go To 2
  No
  - Go To 4
CHECK IF BODY CONTROL MODULE (BCM) CAN BUS DTCS ARE PRESENT
1. With the scan tool, read the BCM DTCs.
  Are there any BCM CAN BUS DTCs present?
  
  Yes
  - Perform the appropriate diagnostic procedure. Refer to the DTC INDEX article.
  No
  - Go To 3
CHECK IF BCM DTCS ARE PRESENT
1. With the scan tool, read BCM DTCs.
  Are there any BCM DTCs present?
  
  Yes
  - Perform the appropriate diagnostic procedure. Refer to the DTC INDEX article.
  No
  - Using the schematics as a guide, check the Transmission Control Module (TCM) pins, terminals, and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM in accordance with the Service Information.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to STANDARD PROCEDURE .
INTERMITTENT WIRING AND CONNECTORS
1. Using the wiring diagram/schematic as a guide, inspect the wiring harness and connectors.
2. Wiggle test the wiring harness and connectors while monitoring the scan tool data relative to this circuit.
3. Look for the data to change or for the DTC to reset during the wiggle test.
4. While monitoring the scan tool data relative to this circuit, move the selector switch to each position several times.
5. Look for the data to change other than as expected or for the DTC to reset.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Test complete, the condition or conditions that originally set this DTC are not present at this time.