Caravan V6-201 3.3L (1995)
PROM - Programmable Read Only Memory: Customer Interest
PCM - Sag or Hesitation on Cold Start Up
NO: 18-22-95
GROUP: Vehicle Performance
EFFECTIVE DATE: Jul. 14, 1995
SUBJECT:
Sag or Hesitation on
Cold Start Up Below 20
Degrees Fahrenheit
THIS BULLETIN SUPERSEDES TECHNICAL SERVICE BULLETIN 18-23-94 DATED DEC. 2, 1994 WHICH SHOULD BE REMOVED FROM
YOUR FILES OR NOTED IN THE 1994 TECHNICAL SERVICE BULLETIN MANUAL (PUBLICATION NO: 81-699-95054). THE
SYMPTOM/CONDITION HAS BEEN REVISED. ALL REVISIONS ARE MARKED WITH **ASTERISKS**.
MODELS:
1993
(AC)
Dynasty/New Yorker/New Yorker Salon
1993 - 1995
(AS)
Caravan/Voyager/Town & Country
1993
(AY)
Imperial/New Yorker Fifth Avenue
1994 - 1995
(ES)
Chrysler Voyager
NOTE:
THIS BULLETIN APPLIES TO VEHICLES BUILT PRIOR TO NOV. 1, 1994 (MDH 11-01-XX) AND EQUIPPED WITH THE 3.3L OR THE
3.8L ENGINE.
SYMPTOM/CONDITION:
Sag or hesitation during operation in ambient temperatures below **20** degrees fahrenheit, high humidity, and usually after the vehicle has been sitting
overnight. **The Check Engine Light may be illuminated and Diagnostic Trouble Code (DTC) "EGR SYSTEM FAILURE" may be present.**
DIAGNOSIS:
Using the Mopar Diagnostic System (MDS) or the Scan Tool (DRB III) with the appropriate Diagnostic Procedure Manual, verify all
engine/transmission 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 codes or only DTC "EGR SYSTEM FAILURE" is present and all systems are functioning
correctly, proceed with the following repair. **
EQUIPMENT/PARTS REQUIRED:
1
CH6000
Scan Tool (DRB III)
1
CH7035
General Purpose Interface Bus Cable (GP1B)
1
CH7015
Engine Cable
1
4669020
Label - Authorized Software Update
1
4275086
Label - Authorized Modification
NOTE:
** THE MOPAR DIAGNOSTIC SYSTEM IS REQUIRED TO PERFORM THE FOLLOWING REPAIR AND THE SYSTEM MUST BE
OPERATING WITH RELEASE 16 OR HIGHER AND TIL CD RELEASE 1085 OR HIGHER MUST BE INSTALLED. **
REPAIR PROCEDURE:
This repair involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software (calibrations) **which disables
EGR diagnostics below 20 degrees fahrenheit.**
1.
Connect the MDS (Mopar Diagnostic System) and DRB III (Scan Tool) to the vehicle and power them up.
2.
Use the arrow keys and select # 2 MDS DIAGNOSTICS on the DRB III 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.
