A/T, Engine Controls - MIL ON/DTC P2173/Shift Improvements
NUMBER: 18-020-12GROUP: Vehicle Performance
DATE: July 20, 2012
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 13.01 OR HIGHER TO
PERFORM THIS PROCEDURE.
SUBJECT:
Flash: MIL Illumination P2173 - High Airflow/Vacuum Leak Detected (Slow Accumulation)And Transmission Shift Improvements
OVERVIEW:
This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software.
MODELS:
2011 - 2012(JS)200/Avenger
NOTE:
This bulletin applies to vehicle equipped with a 2.4L engine (sales code ED3 or EDG) with California emissions, 50 State emissions or Federal emissions (sales codes NAE, NAS or NAA) and an automatic transmission (sales codes DG2, or DFF) built before July 21, 2012 (MDH 0721XX).
SYMPTOM/CONDITION:
MIL Illumination:
The customer may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the Technician may find that P2173 - High Airflow/Vacuum Leak Detected (Slow Accumulation) has been set active or stored. No other symptoms or conditions will exist with the MIL light.
This condition happens after descending a long grade.
Transmission Shift Improvements:
The customer may also experience any of the following shifting concerns:
i. 3rd to 2nd downshift clunk or bump(2012 6 speeds models only)
ii. 4th to 3rd downshift clunk or bump(2012 6 speeds models only)
iii. 1st to 2nd upshift clunk or bump(2012 6 speeds models only)
iv. 4th to 5th upshift clunk or bump(2012 6 speeds models only)
v. 5th to 6th upshift clunk or bump(2012 6 speeds models only)
vi. RPM Fluctuating or Jerking feeling between 60 MPH (96 KPH) to 70 MPH (112 KPH) while operating in cruise control(2011 and 2012 4 speed and 6 speeds models)
Updating the software will correct all the conditions listed above.
DIAGNOSIS:
Using a Scan Tool (wiTECH) with the appropriate Diagnostic Procedures available in TechCONNECT, verify all engine systems are functioning as designed. If DTC's other then the ones listed above are present record them on the repair order and repair as necessary before proceeding further with this bulletin.
If the customer describes the symptom/condition or if the technician finds the DTC, perform the Repair Procedure.
PARTS REQUIRED:
REPAIR PROCEDURE:
NOTE:
Install a battery charger to ensure battery voltage does not drop below 13.2volts. 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/ECM Programming.
2. After PCM reprogramming, the following must be performed: 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.