ECM - Rough Idle/Startup Dieout/Hesitation
NO.: 18-14-92 Rev. AGROUP: Driveability
DATE: Dec. 22, 1992
SUBJECT:
Rough Idle/Startup Dieout And/Or Sag/Hesitation Following Cold Engine Startup - 3.0L MMC Engines
THIS BULLETIN SUPERSEDES TECHNICAL SERVICE BULLETIN 18-14-92 WHICH SHOULD BE REMOVED FROM YOUR FILES. THE SBEC (POWERTRAIN CONTROL MODULES FOR 1992 MODELS HAVE BEEN REVISED). REVISIONS ARE PRINTED AND HIGHLIGHTED WITH **ASTERISKS**.
MODELS:
1991-1992 (AA) Acclaim/Spirit/LeBaron Sedan
(AC) Dynasty/New Yorker Salon
(AG) Daytona
(AJ) LeBaron Coupe/LeBaron Convertible
(AS) Caravan/Grand Caravan/Caravan C/V
Voyager/Grand Voyager
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.
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.
3. Connect the battery.
4. Type the required information on the Authorized Modification Label, as illustrated, and attach near the VECI Label.
PARTS REQUIRED:
1991
1 Single Board Engine Controller (SBEC - Powertrain Control Module) for 3.0L MMC
with Automatic Transaxle:
AA, AG, AJ Federal 4723508
AA, AG, AJ California 4723509
AC Federal 4723557
AC California 4723511
AS Federal 4723513
AS California 4723514
3.0L MMC with Manual Transaxle:
AG, AJ Federal and California 4723559
1992
1 Single Board Engine Controller (SBEC - Powertrain Control Module) for 3.0L
MMC with Automatic Transaxle:
AA, AG, AJ, AP Federal **4741018**
AA, AG, AJ, AP California **4741020**
AC Federal **4741024**
AC California **4741026**
AS Federal **4741028**
AS California **4741030**
3.OL MMC with Manual Transaxle:
AG, AJ, AP Federal and California 4686297
1 Authorized Modification Label 4275086
POLICY:
Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
Labor Operation No. 08-19-91-95 0.4 Hrs.
FAILURE CODE: AM - Authorized Modification