Acclaim V6-181 3.0L SOHC (1990)
Powertrain Control Module: Customer Interest
ECM - Rough Idle/Sag on Initial Launch
NO.: 18-21-92
GROUP: Driveability
DATE: Dec. 14, 1992
SUBJECT:
Rough Idle/Startup Dieout And/Or Sag/Hesitation Following
Cold Engine Startup - 3.0L MMC Automatic Transaxle
THIS BULLETIN SUPERSEDES TECHNICAL SERVICE BULLETIN 18-06-91 WHICH SHOULD BE REMOVED FROM YOUR FILES. THE
SBEC (POWERTRAIN CONTROL MODULES) HAVE BEEN REVISED.
MODELS:
1990
(AA) Acclaim/Spirit/LeBaron Sedan
(AC) Dynasty/New Yorker Salon
(AG) Daytona
(AJ) LeBaron Coupe/LeBaron Convertible
(AQ) Chrysler's TC (Maserati Coupe)
(AS) Caravan/Grand Caravan/Caravan C/V
Voyager/Grand Voyager/Town & Country
SYMPTOM/CONDITION:
Some vehicles may experience rough idle, sag soon after initial launch or startup dieout following a cold start. This may occur when the engine is cold
and the ambient temperature is between 60~F and 90~F.
DIAGNOSIS:
Using MDS or the DRB II (Scan Tool) and appropriate diagnostic procedure manual, verify that all vehicle engine systems are functioning as designed.
If messages/fault codes (diagnostic trouble codes) are present, record them on the repair order for future reference, and repair as necessary. If no
messages/fault codes (diagnostic trouble codes) are present and all systems are functioning correctly, proceed with the following repair.
PARTS REQUIRED:
1
Single Board Engine Controller (SBEC - Powertrain Control Module) for 3.0L MMC
with Automatic Transaxle:
AA, AG, AJ
Federal
4740810
AA, AG, AJ
California
4740811
AC
Federal
4740814
AC
California
4740815
AQ
Federal
4740812
AQ
California
4740813
AS
Federal
4740816
AS
California
4740817
1
Authorized Modification Label
4275086
REPAIR PROCEDURE:
This repair involves replacement of the Single Board Engine Controller (SBEC - Powertrain Control Module) with a revised one.
1.
With the ignition key in the OFF position, disconnect the battery.
2.
Remove the SBEC (Powertrain Control Module) as outlined in the appropriate service manual, and replace the SBEC (Powertrain Control
Module) with unit called out in PARTS REQUIRED.
