Engine Control Module - Erratic Idle Speed

91chrysler02

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 The replacement engine controllers have been superseded to new controllers offering improved engine Automatic Idle Speed control.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.

Figure 1:

2. Type the required information on the Authorized Modification Label, as illustrated in Figure 1, and attach near the VECI label.


POLICY: Reimbursable within the provisions of the warranty.


TIME ALLOWANCE:

Labor Operation No. 08-19-90-98 . . . . . . . . . . . . . . . . . 0.4 Hrs.

FAILURE CODE: AM - Authorized Modification