Diagnostic Procedure
WARNING: This page is about a different car, the 2005 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC TEST REFERENCE - TRANSMISSION SHIFTS EARLY WITH NO DTC'S
| TEST | ACTION | APPLICABILITY |
|---|---|---|
| 1 | If the transmission shifts too early when the transmission is cold, this is a normal condition. Did the problem occur when the transmission temperature was cold? Yes --> The software is designed to protect the transmission from high torque and/or high RPM shifts during cold operation. Perform TRANSMISSION NO TROUBLE CODE VERIFICATION TEST . No --> Go To 2 |
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| 2 | Using the DRBIII®, attempt communication with other Modules on the bus, check for signs of a bus problem such as bus related DTC's and/or communication problems. Although it takes two occurrences of a missed TRD link message to set the fault code, one missed message will cause the transmission to short shift until the next start up. If the vehicle has any indications of a bus problem, it must be repaired first. Do any of the other modules show signs of a bus problem? Yes --> Refer to the appropriate category for the bus problem. Perform TRANSMISSION NO TROUBLE CODE VERIFICATION TEST . No --> Go To 3 |
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| 3 | Using the schematics as a guide, inspect the wiring and connectors specific to the Torque Management Request Sense circuit. Wiggle the wires while checking for shorted and open circuits. Were there any problems found? Yes --> Using the wiring diagram/schematic as a guide, inspect the wiring and connectors and repair as necessary. Perform TRANSMISSION NO TROUBLE CODE VERIFICATION TEST . No --> Test Complete. |
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