30
Service and Maintenance
Troubleshooting
Diagnostics
In the event there is a problem with the transmission system, there are three
primary tasks the driver should perform:
1. Note the driving condition under which the problem occurred.
2. Note the condition of the transmission under which the problem
occurred (i.e. operation mode (Drive, MANUAL, LOW), current gear,
engine speed, etc.).
3. Transmission Reset Procedure.
Transmission Reset Procedure
In some cases, proper transmission operation can be restored by “resetting”
the Transmission Control Module (TCM). Use the following procedure to reset
the TCM.
1. Continue to drive the vehicle to a safe location.
2. Select Neutral (N) mode using the transmission driver interface device.
Note:
Once Neutral is selected, a gear engagement may not be allowed
depending on the problem.
3. Set the vehicle parking brake.
WARNING:
Apply vehicle parking brake and follow OEM parking instruc-
tions. Failure to follow these instructions could cause unintended vehicle
movement and may result in major vehicle component damage, property
damage, severe injury or death.
4. Turn ignition key to Off and allow the engine to shut down.
5. Wait at least 2 minutes.
6. Restart the engine.
7. If the problem continues, contact a service facility to have the vehicle
and transmission system evaluated.
!
