Shadow Convertible L4-153 2.5L SOHC Turbo (1991)
Powertrain Control Module: Customer Interest
Engine Control Module - Erratic Idle Speed
SUBJECT: Revised Engine Controller For Improved Automatic Idle Speed (AIS) Control
NO.: 18-02-91
GROUP: DRIVEABILITY
DATE: Feb. 25, 1991
MODELS:
1991
(AA)
SPIRIT/ACCLAIM/LEBARON
(AC)
DYNASTY/NEW YORKER/SALON
(AG)
DAYTONA
(AJ)
LEBARON COUPE/LEBARON CONVERTIBLE
(AP)
SHADOW/SUNDANCE
(AS)
CARAVAN/GRAND CARAVAN/CARAVAN C/V
VOYAGER/GRAND VOYAGER/TOWN & COUNTRY
SYMPTOM/CONDITION:
Subject vehicles that exhibit the need for improved Automatic Idle Speed control consistency likely require SMEC/SBEC replacement. The replacement
engine controllers have been superseded to new controllers offering improved engine Automatic Idle Speed control. The following diagnosis and repair
procedures will avoid unnecessary replacement of other components.
DIAGNOSIS:
Using a DRB II tester and the appropriate diagnostic procedure manual, verify that all vehicle engine systems are functioning as designed (no fault codes
are present). If all systems are functioning correctly, proceed with the following replacement.
PARTS REQUIRED:
1
Engine Controller (SMEC/SBEC) for 1991 EFI Engines
AP Body, 2.2L, Federal, Automatic
PN 4672464
AP Body, 2.2L, California, Automatic
PN 4672472
AP Body, 2.2L, Federal, Manual
PN 4672451
AP Body, 2.2L, California, Manual
PN 4672449
AA/AG/AJ/AP Body, 2.5L, Federal, Automatic
PN 4672447
AA/AG/AJ/AP Body, 2.5L, Calif., Automatic
PN 4672445
AA/AG/AP Body, 2.5L, Federal, Manual
PN 4672470
AA/AG/AP Body, 2.SL, Calif., Manual
PN 4672466
AS Body, 2.5L, Federal, Automatic
PN 4672478
AS Body, 2.5L, California, Automatic
PN 4672476
AC Body, 2.5L, Federal, Automatic
PN 4672482
1 Authorized Modification Label
PN 4275086
REPAIR PROCEDURE:
This repair involves replacement of the original engine controller (SBEC) with a revised unit.
1.
Replace the engine controller (SBEC) with the appropriate unit as called out in PARTS REQUIRED.
