CLEARING S.I.R. CODE 51 'ACCIDENT DETECTED'

SUBJECT: CLEARING CURRENT SIR CODE 51 (ACCIDENT DETECTED)

VEHICLES AFFECTED: 1990-91 V

A current code 51 cannot be cleared using on-board diagnostics. The Tech 1 scan tool and cartridge, 87-90 ECM "PLUS" (P/N TKO2050B), are essential for SIR and required to clear a code 51.

The option for clearing code 51 on a 1990-1991 Allante, however, is not located under the Allante menu options. In order to clear a current code 51 on a 1990 or 1991 Allante, it is necessary to follow "E,K-CAR" menu options. The attached chart represents 87-90 ECM "PLUS" display screens and appropriate user responses necessary to clear a current code 51.

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.