Engine Controls - Idle Vibration in Park or Neutral
NO.: LTB00139Issue: 1
Date: 17 July 2008
SECTION: 418
Engine Idle Vibration in Park or Neutral - Repair Procedure
AFFECTED VEHICLE RANGE
CONDITION SUMMARY:
Situation:
During the engine warm-up period and intermittently when fully-warmed and the transmission in either Park (P) or Neutral (N), drivers may experience an engine idle vibration. Small changes in engine torque causes a change in ignition timing, causing the engine idle to be unstable.
Action:
In the event of a customer concern of the above, follow the Repair Procedure in this bulletin to reconfigure the Engine Control Module (ECM) and Transmission Control Module (TCM).
PARTS:
No parts necessary
TOOLS
WARRANTY
REPAIR PROCEDURE
RECONFIGURE THE ENGINE AND TRANSMISSION CONTROL MODULES
CAUTION:
A Midtronics PSC-550 Vehicle Power Supply must be connected to the vehicle battery during diagnosis.
1. Connect the Midtronics PSC-550 Vehicle Power Supply to the vehicle battery.
NOTE:
IDS must be loaded with software release DVD 112 with Patch File 8 or later.
2. Connect the IDS to the vehicle and begin a new diagnostic session by entering the correct VIN for the current vehicle.
3. Follow the IDS prompts to read the vehicle configuration.
4. Select No when prompted Do you wish to read diagnostic trouble codes?
5. Select 'tick' to continue.
6. Select the Vehicle Configuration tab when Content Model is displayed.
7. From the Vehicle Configuration menu, configure the Engine control module by selecting from the drop-down menu:
^ 'Module programming' > 'Configure existing module' > Petrol powertrain control module'
8. Select 'tick' to continue, following all on-screen instructions to complete this task.
^ IDS will return to the Vehicle Configuration menu when completed.
9. From the Vehicle Configuration menu, configure the Transmission control module by selecting from the drop-down menu:
^ 'Module programming' > 'Configure existing module' > 'Transmission control module'
10. Select 'tick' to continue, following all on-screen instructions to complete this task.
^ IDS will return to the Vehicle Configuration menu when completed.
11. Exit the current session.
12. Disconnect IDS and the Midtronics PSC-550 Vehicle Power Supply from the vehicle.