D 150 Ramcharger V8-360 5.9L (1989)
Powertrain Control Module: All Technical Service Bulletins
Engine Control Module - Improved Design
Models
1989 AB & AD BODIES
Subject
Revised Engine Controller For Improved A.I.S. (Automatic Idle Speed) Control. With 5.9L Engine, Automatic Transmission.
Index
DRIVEABILITY
Date
December 22, 1989
No.
18-19-89
(C18-15-9)
P-4404
BODY CODE LEGEND
AB - RAM VAN/WAGON (RWD) AD - RAM PICKUP/RAM CAB & CHASSIS/RAMCHARGER (RWD, 4WD) POWER RAM CAB & CHASSIS
(4WD)
Replacement engine controllers for the subject vehicles have been superseded to new controllers offering improved engine A.I.S. (Automatic Idle Speed)
control.
PARTS REQUIRED
ORDER AS REQUIRED:
1 Engine Controller (SMEC)-Federal Emissions
PN 4557391
1 Engine Controller (SMEC)-California Emissions
PN 4557393
1 Authorized Modification Label
PN 4275086
DIAGNOSIS
Before proceeding to the repair procedure, verify the system is functioning as designed using the appropriate diagnostic test procedure.
REPAIR PROCEDURE:
This repair procedure involves replacing the engine controller (SMEC) with a revised engine controller.
1.
Replace engine controller with appropriate engine controller as outlined in service manual.
