Cirrus V6-2.5L VIN H (1995)
Engine Control Module: Customer Interest
PCM - Engine Sag or Hesitation On Cold Start Up
NO: 18-16-95
GROUP: Vehicle Performance
DATE: May 19, 1995
SUBJECT:
Engine Sag or Hesitation Following Start-Up In Cold Ambient Temperatures
MODELS:
1995 (JA) Cirrus/Stratus
NOTE:
THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH A 2.5L ENGINE BUILT BEFORE APR. 13, 1995 (MDH 04-13-XX).
SYMPTOM/CONDITION:
Rapid throttle tip-in engine sag or hesitation during engine warm-up following a cold start at ambient temperatures less than 0°F.
DIAGNOSIS:
Using the Mopar Diagnostic System (MDS) or the Scan Tool (DRBIII) and appropriate Diagnostic Procedure Manual, verify that all engine systems are
functioning correctly. If Diagnostic Trouble Codes (DTC's) are present, record them on the repair order for future reference and repair as necessary. If
the symptom described is still present perform the repair procedure.
EQUIPMENT/PARTS REQUIRED:
1
CH6000
Scan Tool (DRBIII )
1
CH7035
General Purpose Interface Bus Cable (GPIB)
1
CH7000
J1962 Cable
1
4669020
Label - Authorized Software Update
1
4275086
Label - Authorized Modification
REPAIR PROCEDURE:
This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software (calibration change).
NOTE:
MDS AND DRBIII ARE REQUIRED TO PERFORM THE FOLLOWING REPAIR. MDS MUST BE OPERATING WITH RELEASE 16 OR
HIGHER AND TIL 1079 OR HIGHER INSTALLED.
1.
Connect the MDS and DRBIII to the vehicle and power them up.
2.
Use the arrow keys and select # 2 MDS DIAGNOSTICS on the DRBIII MAIN MENU Screen.
3.
Use the arrow keys and select DIAGNOSTIC MENU on the MDS, then press NEXT MENU.
4.
Use the arrow keys and select CONTROLLER PROGRAMMING on the MDS, then press NEXT MENU.
5.
Use the arrow keys and select PROGRAM CONTROLLER PART on the MDS, then press NEXT MENU.
6.
Follow the steps presented on the MDS and DRBIII which will allow the DRBIII to obtain the current part number of the PCM.
7.
The MDS will display the part number of the PCM on the vehicle and the appropriate replacement part number, then press NEXT MENU to begin
programming.
If the PCM on the vehicle has already been updated or programmed, a NO UPDATES AVAILABLE message will be displayed. Check the part
number of the PCM on the vehicle and compare it to the part number displayed. If the PCM has already been updated, then a system problem
actually exists and should be corrected.
8.
The MDS and DRBIII will prompt the operator for any action needed during the remainder of the programming process.
NOTE: