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 - POOR SHIFT QUALITY
| TEST | ACTION | APPLICABILITY |
|---|---|---|
| 1 |
NOTE:
A under or over filled Transmission Fluid Level can cause many shift quality problems. If the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information. If the transmission shifts early when cold, this is a normal condition. The controller software is designed to protect the transmission from high torque and/or high RPM shifts during cold operation.Check and repair all engine DTC's prior to any Transmission diagnostics. A inconsistent TPS/APPS operation can cause an abnormal or erratic shift pattern.With the DRBIII®, monitor the TPS/APPS voltage for a smooth voltage change while slowly opening and closing the throttle. If the voltage change is not smooth, replace the sensor.Using the wiring diagram/schematic as a guide, inspect the wiring and connectors. Repair as necessary.Perform the Shift Lever Position Test. If the test does not pass, refer to the test,P0706 Check Shifter Signal, in the transmission category.
NOTE:
Verify the flash level of the transmission controller. Some problems are corrected by software upgrades to the transmission controller. If a controller software update was performed, make sure to perform the Drive Learn Procedure. A abnormal or erratic shift pattern may transpire if the Drive Learn Procedure is not performed.
NOTE:
Check for any applicable TSB's that may apply. Where there any problems found?Yes --> Repair as necessary.Perform TRANSMISSION NO TROUBLE CODE VERIFICATION TEST .No --> Test Complete. |
All |