Diagnostic Test

CHECK FOR OTHER TRANSMISSION DTCS
1. With the scan tool, check for other transmission DTCs.
  Are there any gear ratio and/or speed sensor DTCs present in addition to P0219?
  
  Yes
  - Refer to DIAGNOSIS AND TESTING and perform the appropriate symptom. If speed sensor DTCs are present, perform their respective test first.
  No
  - Go To 2
CHECK FOR PCM DTCS
1. With the scan tool, check for PCM DTCs.
  Are there any PCM DTCs present?
  
  Yes
  - Refer to the appropriate Testing & Diagnostics article in Engine Performance and perform the appropriate diagnostic procedure.
  No
  - Go To 3
CHECK IF ENGINE MECHANICAL PROBLEMS ARE PRESENT
1. Determine if any Engine mechanical problems are present.
  Are there any Engine mechanical problems present?
  
  Yes
  - Repair engine as necessary.
  - Perform the NAG1 TRANSMISSION VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 4
CHECK IF TRANSMISSION MECHANICAL PROBLEMS ARE PRESENT
1. Determine if any Transmission mechanical problems are present.
2. Turn the ignition off to the lock position.
3. Remove the Transmission Oil Pan and inspect for excessive debris or a plugged Transmission Oil Filter. Refer to FLUID AND FILTER, STANDARD PROCEDURE .
  Is there any debris, plugged Transmission Oil Filter, or signs of an internal transmission problem?
  
  Yes
  - Repair Transmission as necessary.
  - Perform the NAG1 TRANSMISSION VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 5
TEST DRIVE VEHICLE
NOTE:
The Engine and Transmission must not have mechanical problems and be operating normally before proceeding with this test.
1. Replace and program the Powertrain Control Module (PCM) in accordance with the Service Information. Refer to the appropriate Testing & Diagnostics article in Engine Performance for the appropriate service procedures.
2. Reassemble any previously disconnected connectors and/or components.
3. With the scan tool, erase Transmission DTCs.
4. Road test the vehicle.
5. With the scan tool, read Transmission DTCs.
  Did DTC P0219-ENGINE OVERSPEED reset?
  
  Yes
  - Using the schematics as a guide, check the Transmission Control Module (TCM) terminals 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 NAG1 TRANSMISSION VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Test Complete
  - Perform the NAG1 TRANSMISSION VERIFICATION TEST. Refer to STANDARD PROCEDURE .