Diagnostic Test

WARNING: This page is about a different car, the 2012 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.

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 symptom. 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 3.7L - DIAGNOSTIC CODE INDEX and perform the appropriate symptom.
  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. Refer to 3.7L ENGINE - SERVICE INFORMATION for the appropriate repair procedures.
  - 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. Refer to STANDARD PROCEDURE .
  Is there any debris, plugged Transmission Oil Filter, or signs of an internal transmission problem?
  
  Yes
  - Repair Transmission as necessary. Refer to DIAGNOSIS AND TESTING .
  - 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) per the Service Information. Refer to ELECTRONIC CONTROL MODULES - SERVICE INFORMATION 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 per the Service Information. Refer to MODULE, TRANSMISSION CONTROL, DESCRIPTION .
  - 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.