Diagnostic Test

CHECK TRANSMISSION FLUID LEVEL
1. Check the Transmission fluid level. Refer to FLUID AND FILTER, STANDARD PROCEDURE .
  Is the fluid level correct?
  
  Yes
  - Go To 2
  No
  - Repair any Transmission fluid leaks and fill the transmission to the correct level.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST - 948TE 9HP48 .
CHECK FOR AN ACTIVE DTC
1. With the scan tool, read all 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 3
  No
  - Perform the TESTING FOR AN INTERMITTENT CONDITION procedure. Refer to TESTING FOR AN INTERMITTENT CONDITION .
CHECK PARK LOCK HARDWARE
1. Remove the Valve Body and inspect the Park Lock hardware and solenoids for binding and damage. Refer to VALVE BODY, REMOVAL .
  Were any problems found?
  
  Yes
  - Repair the Park Lock Hardware or Solenoid.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST - 948TE 9HP48 .
  No
  - Replace the Valve Body in accordance with the Service Information.
    Refer to VALVE BODY, REMOVAL .
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST - 948TE 9HP48 .