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 DIAGNOSTIC CODE INDEX and perform the appropriate diagnostic procedure. If speed sensor DTCs are present, perform their respective test first.
  No
  - Go To 2.
CHECK FOR ENGINE DTCS
1. With the scan tool, check for engine DTCs.
  Are there any engine DTCs present?
  
  Yes
  - Refer to DIAGNOSTIC CODE INDEX 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 in accordance with the Service Information.
  - Refer to STANDARD PROCEDURE and perform the NAG1 TRANSMISSION VERIFICATION TEST.
  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 in accordance with the Service Information.
  Is there any debris, plugged Transmission Oil Filter, or signs of an internal transmission problem?
  
  Yes
  - Repair the Transmission as necessary in accordance with the Service Information.
  - Refer to STANDARD PROCEDURE and perform the NAG1 TRANSMISSION VERIFICATION TEST.
  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.
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) connectors and terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace and program the TCM in accordance with the Service Information.
  - Refer to STANDARD PROCEDURE and perform the NAG1 TRANSMISSION VERIFICATION TEST.
  No
  - Test Complete
  - Refer to STANDARD PROCEDURE and perform the NAG1 TRANSMISSION VERIFICATION TEST.