Grand Cherokee SRT-8 V8-6.1L (2009)
Engine Control Module: All Technical Service Bulletins
Engine Controls - Cold Start Rough Idle/DTC P050D/MIL ON
NUMBER: 18-027-09
GROUP: Vehicle Performance
DATE: September 30, 2009
THE wiTECH DIAGNOSTIC APPLICATION IS THE PREFERRED METHOD FOR FLASHING ECUs.
HELP USING THE wiTECH DIAGNOSTIC APPLICATION FOR FLASHING AN ECU IS AVAILABLE BY SELECTING "HELP" THEN "HELP
CONTENTS" AT THE TOP OF THE wiTECH DIAGNOSTIC APPLICATION WINDOW.
THE wiTECH SOFTWARE LEVEL MUST BE AT RELEASE 10.01 OR HIGHER TO PERFORM THIS PROCEDURE.
StarMOBILE STANDALONE MODE OR StarMOBILE DESKTOP CLIENT MAY ALSO BE USED TO PERFORM THIS PROCEDURE.
SUBJECT:
Flash: MIL Illumination For PO5OD - Cold Start Rough Idle
OVERVIEW:
This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software.
MODELS:
2008 - 2009
(WK)
Grand Cherokee
NOTE:
This bulletin applies to WK vehicles equipped with a 6.1 L engine with a NAG1 automatic transmission (Sales code ESF and DGJ) and 50 State
emissions (sales code NAS).
SYMPTOM/CONDITION:
The customers may experience a MIL illumination. Upon further investigation the Technician may find that PO5OD - Cold Start Rough Idle has been
set.
DIAGNOSIS:
Using a Scan Tool (wiTECH(TM) or StarSCAN(R)) with the appropriate Diagnostic Procedures available in TechCONNECT, verify all engine systems
are functioning as designed. If DTC's are present other then the one listed above record them on the repair order and repair as necessary before
proceeding further with this bulletin.
If the above condition is present, perform the Repair Procedure.
PARTS REQUIRED:
REPAIR PROCEDURE:
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. After PCM reprogramming, the following must be performed:
a. Clear any DTC's that may have been set in other modules due to reprogramming. The wiTECH application will automatically present all DTCs
after the flash and allow the tech to clear them.
2. Type the necessary information on the "Authorized Modification Label" and attach it near the VECI label.
