Engine Controls - Idle Vibration/Dip With Cooling Fan ON

NUMBER: 18-021-08

GROUP: Vehicle Performance

DATE: April 29, 2008

THE StarSCAN(R) FLASH FILES FOR THIS BULLETIN MUST BE RETRIEVED FROM THE INTERNET.

StarSCAN(R) SOFTWARE LEVEL MUST BE AT RELEASE 8.04 OR HIGHER.

StarMOBILE DESKTOP CLIENT -OR- StarMOBILE STANDALONE MODE MAY ALSO BE USED TO PERFORM THE FLASH.

SUBJECT:
Flash: Momentary Increase In Engine Idle Vibration With A Slight Dip In Idle RPM When The Cooling Fan Is Engaged

OVERVIEW:
This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM).

MODELS:

2008 (PM) SRT 4 Caliber

NOTE:
This bulletin applies to models equipped with a 2.4L Turbo engine (Sales Code ED4) built prior to April 18, 2008 (MDH 0418XX).

SYMPTOM/CONDITION:
Some customers may experience a slight dip in engine idle speed along with a momentary increase in engine idle harshness as the cooling fan engages. This is caused by a spike in electrical load to the Alternator.

DIAGNOSIS:
Using a scan tool with the appropriate diagnostic procedures available in TechCONNECT, verify all engine systems are functioning as designed. If DTC's are present record them on the repair order and repair as necessary before proceeding further with this bulletin.

If no DTC's are present and the vehicle operator experiences the Symptom/Condition perform the repair procedure.





PARTS REQUIRED





SPECIAL TOOLS / EQUIPMENT REQUIRED:

REPAIR PROCEDURE - USING THE INTERNET TO RETRIEVE THE FLASH FILE:

NOTE:
If this flash process is interrupted/aborted, the flash should be restarted.

1. Reprogram the PCM with the latest software. Follow the detailed service procedures available in DealerCONNECT/TechCONNECT, Refer To Group 8 - Electrical > Electronic Control Modules - Service Information > Module - Powertrain Control > Standard Procedures > PCM/ECM Programming - Gas.

2. Type the necessary information on the "Authorized Modification Label" and attach it near the VECI label.

POLICY:
Reimbursable within the provisions of the warranty.





TIME ALLOWANCE:





FAILURE CODE:

Disclaimer:
This bulletin is supplied as technical information only and is not an authorization for repair.