GM Service Manual Online
For 1990-2009 cars only

ABS CODES MAY BE SET BY RELAY REPLACE ABS ENABLE RELAY

SUBJECT: ABS BRAKE CODES A014/A015, A016/A017 AND A018 (UPDATE ABS ENABLE RELAY)

VEHICLES AFFECTED: 1991 N CARS

Condition:

---------- Some 1991 N-cars equipped with antilock brakes (RPO JM4) may experience a code A014, A015, A016, A017 or A018.

Cause:

------- These codes may be set by the ABS enable relay.

Correction:

------------ Follow the appropriate ABS diagnosis code chart to find cause of the code(s). If normal system diagnosis does not resolve the condition, replace the ABS enable relay with P/N 12088594.

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.