Diagnostic Test

CHECK FOR OTHER TRANSMISSION DTCS
1. With the scan tool, check for other Transmission Control Module (TCM) DTCs.
  Are any other TCM DTCs set?
  
  Yes
  - Repair the other TCM DTCs. Refer to DTC TROUBLESHOOTING .
  No
  - Go To 2
CHECK FOR ENGINE AND CONTROLLER AREA NETWORK (CAN) DTCS
1. With the scan tool, check for Powertrain Control Module (PCM) and CAN DTCs.
  Are any PCM or CAN DTCs set?
  
  Yes
  - Repair the PCM or CAN DTCs. Refer to DTC TROUBLESHOOTING .
  No
  - Go To 3
CHECK FOR ENGINE MECHANICAL PROBLEMS
1. Determine if any Engine mechanical problems are present.
  Are any Engine mechanical problems present?
  
  Yes
  - Repair Engine mechanical problems in accordance with the Service Information.
  - Perform TRANSMISSION VERIFICATION TEST. Refer to 948TE-9HP48 TRANSMISSION VERIFICATION TEST .
  No
  - Go To 4
CHECK FOR TRANSMISSION MECHANICAL PROBLEMS
1. Check for the following conditions:
  - Low Transmission fluid level.
    Refer to FLUID AND FILTER, STANDARD PROCEDURE .
  - Transmission fluid leaks.
  - Plugged Transmission oil filter.
  - Excessive debris in Transmission oil pan.
  Were any problems found?
  
  Yes
  - Repair Transmission in accordance with the Service Information.
  - Perform TRANSMISSION VERIFICATION TEST. Refer to 948TE-9HP48 TRANSMISSION VERIFICATION TEST .
  No
  - Go To 5
CHECK FOR AN ACTIVE DTC
NOTE:
The Engine and Transmission must not have any mechanical problems and be operating normally before proceeding with this test.
1. With the scan tool, read TCM DTCs and record on the repair order.
2. Record the Event Data and Environmental Data.
3. With the scan tool, erase DTCs.
4. Using the recorded Event and Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
5. With the scan tool, read TCM DTCs.
  Did the DTC return?
  
  Yes
  - Go To 6
  No
  - Perform the TESTING FOR AN INTERMITTENT CONDITION procedure.
    Refer to STANDARD PROCEDURE .
CHECK RELATED HARNESS CONNECTIONS
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. Reconnect all TCM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
6. Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
7. Reconnect 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 Event and 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 TCM DTCs.
  Did the DTC return?
  
  Yes
  - Replace the TCM in accordance with the Service information. Refer to MODULE, TRANSMISSION CONTROL (TCM), REMOVAL AND INSTALLATION .
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to 948TE-9HP48 TRANSMISSION VERIFICATION TEST .
  No
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to 948TE-9HP48 TRANSMISSION VERIFICATION TEST .
  - Test complete.