Acclaim V6-181 30L SOHC (1990): TCM Surge Above 45Mph
Technical Service Bulletin # 210690
Date: 900226
TCM - Surge Above 45Mph
Models
1990 AA Body
Subject
Surge Caused By Locking/Unlocking Of The Torque Convertor On Vehicles Equipped With 3.0L Engine & A-604 Transmission
Index
TRANSMISSION
Date
February 26, 1990
No.
21-06-90 P-532 (C21-03-0)
Body Code Legend
AA - ACCLAIM/SPIRIT/LEBARON
THIS TECHNICAL SERVICE APPLIES ONLY TO 1990 AA BODIES EQUIPPED WITH 3.0L ENGINE BUILT PRIOR TO MDH 01-16-XX, AND
EQUIPPED WITH HEADLAMP/DASH WIRING HARNESS PN 4481855.
Symptom, Condition, Diagnosis, Parts
SYMPTOM/CONDITION
Some owners may complain of a surge condition at speeds above 45 MPH. This condition may be caused by an RF signal being generated in the
headlamp/dash wiring harness which results in a locking/unlocking of the torque convertor.
DIAGNOSIS
Check the headlamp/dash wiring harness part number. The harness PN tag is located under the air cleaner hose just behind the engine and main battery
disconnects. If the harness PN is 4625355, this bulletin does not apply.
Connect the DRB II to the instrument panel blue bus connector and start engine. Put the DRB II in the RPM display mode. Drive the vehicle on a level
or slightly up-hill road with the transmission selector in the OD position at 1550 engine RPM (use the speed control if vehicle is equipped). If the DRB II
bottom line flashes "NO RESPONSE" OR "COMMAND REJECT", perform the following repair procedure.
If the above flashing displays are not present on the DRB II, refer to the appropriate Powertrain Diagnostic Manual.
NOTE:
WHEN USING THE DRB II TO DIAGNOSE THE 1990 A- 604 TRANSMISSION, THE 1990 CARTRIDGE MUST BE USED TO
INSURE ALL THE 1990 DIAGNOSTICS ARE AVAILABLE.
PARTS REQUIRED
3 - Heat Shrink Tube (10 in package) PN 4419644.
Repair Procedure
