Air Bag - Production Change to Forward Sensors

9217buick05

Bulletin 92-9-7

Date Nov. '91

Ref. No. 92-56-9

Corp. Ref. No. 109006


SUBJECT:
SERVICE MANUAL UPDATE - SECTION 9J - SIR DIAGNOSIS

MODELS AFFECTED:
1992 ROADMASTER


After start of production, changes were made in the SIR System involving the forward discriminating sensors and associated circuit wiring.

As a result, on vehicles before VIN NR421429, the 1992 Roadmaster Preliminary Service Manual must be used for SIR diagnosis.

For vehicles numbered NR421429 and later, the 1992 Roadmaster Final Service Manual must be used.

A quick check to verify early or later forward discriminating sensors and circuit wiring involves the number of pins on the right hand sensor:

Before VIN NR421429 - 3 pin sensor

VIN NR421429 and later - 2 pin sensor

When servicing the SIR System on the 1992 Roadmaster, identify which SIR System circuit you are diagnosing and use the correct manual.