PCM - Cold Start Idle/Sags/Hesitations: Overview
NO: 18-30-97GROUP: Driveability
DATE: Oct. 31, 1997
SUBJECT:
Cold Start Idle Quality/Sags/Hesitations
MODELS:
1997 (PR) Prowler
NOTE:
THIS BULLETIN APPLIES TO VEHICLES WITH 3.5L ENGINES BUILT PRIOR TO OCTOBER 6, 1997 (MDH 1006XX).
SYMPTOM/CONDITION:
Long cold start times, warm-up sags, hesitations and poor idle quality. Symptoms are more pronounced at temperatures between 40 to 90 degrees F. The poor driveability may persist for up to a minute after which no problems are experienced. The condition described may be caused by the type of fuel used.
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 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/PARTS REQUIRED:
1 CH6000 Scan Tool (DRB III)
1 CH7035 General Purpose Interface Bus Cable (GPIB)
1 CH7000/7001 J1962 Cable
1 4669020 Label - Authorized Software Update
1 4275086 Label - Authorized Modification
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 1144 OR HIGHER MUST BE INSTALLED.
POLICY: Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
Labor Operation No: 08-19-48-96 0.5 Hrs.
FAILURE CODE: FM - Flash Module