Engine Controls - Revised Chart C-17 Cruise Control Inop

9217buick03

Bulletin: 92-6E-16

Date: MAR. '92

Ref. No.: 92-179-6E

Corp. Ref. No.: 216505


SUBJECT:
SERVICE MANUAL UPDATE - SECTION 6E3 DRIVEABILITY AND EMISSIONS CHART C-17

MODELS AFFECTED:
1991-92 PARK AVENUE/ULTRA, LESABRE AND RIVIERA/REATTA


The above 1991 and '92 Park Avenue/Ultra, LeSabre and Riviera/Reatta models equipped with 3800 (VIN 1 and VIN L) engines and PCM controlled cruise control, may exhibit a "Cruise Control Inoperative" condition which cannot be isolated using the Cruise Control System check (Chart C-17) in Section 6E3 of the Service Manual. This condition can be caused by an open TCC brake switch input circuit to the PCM. If the cause of a "Cruise Control Inoperative" condition cannot be determined after completing the Cruise Control System check (Chart C-17), perform procedure in the Code 38 Chart in Section 6E3-A for TCC brake switch circuit diagnosis.