Engine, A/T Controls - Performance Enhancements
NUMBER: 21-010-11GROUP: Transmission and Transfer Case
DATE: October 26, 2011
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 12.01 OR HIGHER TO PERFORM THIS PROCEDURE.
SUBJECT:
Flash: Driveability and Transmission Performance Improvements
OVERVIEW:
This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) and Transmission Control Module (1CM) with new software.
NOTE:
Both the PCM and TCM must be reprogrammed for these changes to be implemented.
MODELS:
2011 (MK) Compass/Patriot
2011 (PM) Caliber
NOTE:
This bulletin applies to vehicles equipped with a 2.0L or 2.4L (sales code ECN or ED3) equipped with an automatic transmission (sales code DAV).
SYMPTOM/CONDITION:
The customer may experience any of the following:
I. Overall improved acceleration and responsiveness to throttle input.
II. Improved highway speed throttle pedal responsiveness and passing acceleration.
III. Reduce engine RPM's while accelerating at highway speeds.
IV. Deceleration bump felt between speeds of 20 - 25 MPH (32 - 40 KPH).
V. Less throttle pedal effort necessary to maintain a constant highway speed.
VI. RPM hangs (HI RPM) after a normal acceleration followed by the driver reducing the throttle input.
Updating the PCM and TCM software will correct the conditions listed above.
DIAGNOSIS:
Using a Scan Tool (wiTECH(TM)) with the appropriate Diagnostic Procedures available in TechCONNECT, verify all engine and transmission 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 the above condition is present, perform the Repair Procedure.
PARTS REQUIRED:
REPAIR PROCEDURE:
NOTE:
Both the PCM and TCM must be reprogrammed for these changes to be implemented.
NOTE:
Install a battery charger to ensure battery voltage does not drop below 13.2 volts. Do not allow the charging voltage to climb above 13.5 volts during the flash process.
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 Programming.
2. Reprogram the TCM with the latest software. Follow the detailed service procedures available in DealerCONNECT/TechCONNECT, Refer To Group 8 - Electrical > Electronic Control Modules - Service Information > Module - Transmission Control > Standard Procedures > TCM Programming. After 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.
3. 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.