PCM - False MIL With Hex Code #58: Overview

NO: 18-35-96

GROUP: Vehicle Performance

DATE: Dec. 27, 1996

SUBJECT:

Erroneous MIL Illumination With Hex Code $58,
Elimination of Erroneous PCM Reset

MODELS:

1996 - 1997 (LH) Concorde/Intrepid/Vision/LHS/New Yorker

NOTE:
THIS BULLETIN APPLIES TO ALL 1996 VEHICLES WITH 3.5L ENGINES AND 1997 VEHICLES WITH 3.5L ENGINES BUILT PRIOR TO NOVEMBER 29, 1996 (MDH 11-29-XX).

SYMPTOM/CONDITION:

1. Erroneous MIL illumination with DTCs MANIFOLD TUNE VALVE SOLENOID CIRCUIT - Hex $58.

2. 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.

EQUIPMENT REQUIRED

All Symptoms (Flash Programming)

1 CH6000 Scan Tool (DRB III)
1 CH7035 General Purpose Interface Bus Cable (GPIB)
1 CH7000 J1962 Cable
1 4669020 Label - Authorized Software Update
1 4275086 Label - Authorized Modification
1 5234217 Solenoid, Manifold Tuning Valve (if required)

NOTE:
THE MDS AND DRB III ARE REQUIRED TO PERFORM THIS REPAIR AND THE SYSTEM MUST BE OPERATING WITH RELEASE 21 OR HIGHER AND TIL CD RELEASE 1123 OR HIGHER MUST BE INSTALLED.

POLICY: Reimbursable within the provisions of the warranty.

TIME ALLOWANCE:

Labor Operation No: 08-19-46-99 0.5 Hrs.
25-01-49-90 0.2 Hrs.

FAILURE CODE: FM - Flash Module
P8 - New Part