VEHICLE SPEED SENSOR SEC. 8A MANUAL/REVISED PAGES
VEHICLES AFFECTED: 1988-90 BUICK, PONTIAC AND OLDSMOBILE W-CAR
SERVICE MANUAL UPDATE - SECTION 8A -33
The diagnostic test information in the 1988, 1989 and 1990 W-car Service Manuals Section 8A-33 has been revised. Please make the following corrections in your copies of the following Service Manuals.
1988 BUICK REGAL
Page 8A-33-2
Delete Test "B: ELECTRONIC CONTROL MODULE OUTPUT TEST (TABLE 1)"
Page 8A-33-3
Delete Test "B: ELECTRONIC CONTROL MODULE OUTPUT TEST (TABLE 2)" and Delete Test "B: ELECTRONIC CONTROL MODULE OUTPUT TEST (TABLE 3)"
Insert the attached new test B, Page 8A33-2A.
1989 and 1990 BUICK REGAL
Page 8A-33-2
Delete Test "B: ELECTRONIC CONTROL MODULE OUTPUT TEST (TABLE 1) and Delete Test "B: ELECTRONIC CONTROL MODULE OUTPUT TEST (TABLE 2)"
Page 8A-33-3
Delete Test "B: ELECTRONIC CONTROL MODULE OUTPUT TEST (TABLE 3)" and Delete Test "B: ELECTRONIC CONTROL MODULE OUTPUT TEST (TABLE 4)"
Insert the attached new test B, Page 8A-33-2A.
1988, 1989 and 1990 PONTIAC GRAND PRIX AND 1988 OLDSMOBILE CUTLASS SUPREME
Page 8A-33-2
Delete Test "B: ELECTRONIC CONTROL MODULE OUTPUT TEST (TABLE 1)" and Delete Test "B: ELECTRONIC CONTROL MODULE OUTPUT TEST (TABLE 2):
Page 8A-33-3
Delete Test "B: ELECTRONIC CONTROL MODULE OUTPUT TEST (TABLE 3)"
Insert the attached new test B, Page 8A-33-2A.
1989 and 1990 OLDSMOBILE CUTLASS SUPREME
Page 8A-33-2
Delete the second Symptom in the Symptom Table, which reads:
"Speedometer and all other speed related functions do not operate properly, ECM Code 24 is not set."
and replace it with:
"Speedometer and/or Cruise Control, Driver Information Centre, Automatic Safety Belt, or Turn Signal Reminder speed signal related feature(s) do not work, but ECM Code 24 is not set."
Delete Test "B: ELECTRONIC CONTROL MODULE OUTPUT TEST (TABLE 1)"
Page 8A-33-3
Delete Test "B: ELECTRONIC CONTROL MODULE OUTPUT TEST (TABLE 2)" and Delete Test "B: ELECTRONIC CONTROL MODULE OUTPUT TEST (TABLE 3)"
Insert the attached new test B, Page 8A-33-2A.
General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.
