MIL - Erroneously ON, Hex Codes #6A/#77 Set: Overview
NO: 18-11-97GROUP: Vehicle Performance
DATE: Feb. 28, 1997
SUBJECT:
Erroneous MIL Illumination With Hex Codes $6A, $77, Erroneous PCM Resets, Shift Cycling, Cold Engine Stumble, Bucking
MODELS:
1997 (FJ) Avenger/Sebring
1997 (JA) Breeze/Cirrus/Stratus
1997 (JX) Sebring Convertible
NOTE:
THIS BULLETIN APPLIES TO VEHICLES BUILT PRIOR TO JAN. 31, 1997 (MDH 01-31-XX) WITH THE FOLLOWING ENGINE APPLICATIONS:
FJ JA/JX
2.5L 2.0L/2.4L/2.5L
SYMPTOM/CONDITION:
1. 2.0L MTX - Bucking during parking lot maneuvers (first/second gear), difficult to drive smoothly.
2. 2.4L - Erroneous MIL illumination with DTC RIGHT REAR (OR JUST) FUEL SYSTEM LEAN - Hex $77.
3. 2.4L/2.5L - Erroneous MIL illumination with DTC MULTIPLE CYLINDER MIS-FIRE - Hex $6A.
4. 2.4L/2.5L - Shift cycling between 2nd and 3rd gear with resume of Interactive Cruise Control above 20 MPH on a grade.
5. 2.4L/2.5L - Engine stumble within 10 seconds of a cold start. If this condition persists after repair, it is recommended to change fuel brands.
6. 2.0L/2.4L/2.5L - Engine stumble or miss at idle or open throttle at 2 minute intervals. This condition can only occur after a fuel system (rich/lean) fault (MIL) has been set and the condition corrects itself after 3 good OBD II trips or a technician makes repairs and does not erase the faults. The stumble occurs after 3 good OBD II defined trips at which time the engine control module does a reset every 2 minutes during a drive cycle.
DIAGNOSIS:
Using the Mopar Diagnostic System (MDS) or the Diagnostic Scan Tool (DRB III) with the appropriate Diagnostic Procedures Manual, verify all engine systems are functioning as designed. If Diagnostic Trouble Codes (DTC's) are present, record them on the repair order and repair as necessary before proceeding further with this bulletin. If no DTC's other than those listed above are present and any of the above symptoms have been experienced, perform the Repair Procedure.
NOTE:
WHENEVER A POWERTRAIN CONTROL MODULE (PCM) IS REPLACED, DUE TO FAILURE, THE SOFTWARE OF THE REPLACEMENT PCM SHOULD BE VERIFIED FOR THE LATEST REVISION LEVEL.
EQUIPMENT REQUIRED:
All Symptoms (Flash Programming)
1 CH6000 Scan Tool (DRB III)
1 CH7035 General Purpose Interface Bus Cable (GPIB)
1 CH7000/7001 J1962 Cable
1 CH7010 J1962/MMC Cable
1 4669020 Label - Authorized Software Update
1 4275086 Label - Authorized Modification
NOTE:
THE MDS AND DRBIII ARE REQUIRED TO PERFORM THIS REPAIR AND THE SYSTEM MUST BE OPERATING WITH RELEASE 21 OR HIGHER AND TIL CD RELEASE 1127 OR HIGHER MUST BE INSTALLED.
POLICY: Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
Labor Operation No: 08-19-47-91 0.5 Hrs.
FAILURE CODE: FM - Flash Module