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Home >> Jeep >> 2018 >> Grand Cherokee Laredo, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 29 (8HP70 Automatic Transmission - DTCS P0219-00 To P1D92-00) >> DTC Troubleshooting >> P1D92-00-Incorrect Gear Ratio - Clutch 4 Defective >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different variant/trim than selected.
  1. CHECK FOR AN ACTIVE DIAGNOSTIC TROUBLE CODE (DTC) 
    1. With the scan tool, read Transmission Control Module (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  2

      No 

      • Go To  3
  2. CHECK TRANSMISSION FLUID CONDITION 
    1. Check the Transmission fluid condition.

      Is the Transmission fluid burnt?

      Yes 

      • Remove the Transmission and perform the appropriate repair for this DTC in accordance with the Service Information. Refer to REMOVAL .
      • Perform the TRANSMISSION VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST .

      No 

  3. CHECK WIRING AND CONNECTORS 
    1. The conditions necessary to set the DTC are not present at this time.
    2. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit.
    3. Wiggle the wires while checking for shorted and open circuits.
    4. Check for any Service Bulletins that may apply.

      Were any problems found?

      Yes 

      No 

      • Test complete.