Engine Controls - A/T In Limp-In Mode/No DTC's Set

NUMBER: 21-006-09

GROUP: Vehicle Performance

DATE: September 22, 2009

THIS BULLETIN SUPERSEDES TECHNICAL SERVICE BULLETIN 21-013-08 REV. A, DATED AUGUST 20, 2008, WHICH SHOULD BE REMOVED FROM YOUR FILES. ALL REVISIONS ARE HIGHLIGHTED WITH **ASTERISKS** AND INCLUDE THE ADDITION OF THE 2009 MODELS.

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 DESKTOP CLIENT or StarSCAN MAY ALSO BE USED TO PERFORM THIS PROCEDURE.

SUBJECT:
Flash: Transmission Remains In "Limp-In" Mode After An Engine Start With No DTC

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

MODELS:

2007 - **2009** (ND) Dakota

NOTE:
This bulletin applies to models equipped with a 3.7L engine and a 42RLE transmission (Sales Code EKG and DGV).

SYMPTOM/CONDITION:

The customer may experience that their vehicle transmission remains in "Limp-In mode (second gear) after an engine start. The transmission will not shift to a higher gear. This condition may be intermittent. If the engine is turned off and an engine restart is performed, the transmission will often perform normally (not remain in "Limp-In mode). There will be no transmission related Diagnostic Trouble Codes (DTC) present.

"Limp-In mode is used to protect the transmission. The transmission logic will remain in or revert to this mode if certain required operating parameters are not met in a specified time during engine start.

DIAGNOSIS:

If the above symptom/condition is experienced perform the following 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.

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.