BCM - Revised Code C553 (CRT) Wiring Diagram

9218oldsmobile06

NUMBER: 89-T-171

CORP.REF.NO: 118110

DATE: June 1991

SECTION: 8C, 8D


SUBJECT:
SERVICE MANUAL UPDATE REVISIONS FOR CODE C553

MODELS/YEARS:
1989 TORONADO





The diagnostic procedure for code C553 (page 8D2-77 in the service manual) is being revised to eliminate unnecessary CRT controller replacements. See the illustration.

IMPORTANT: The color CRT monitor and control module is referred to in the Owner's Manual as "Visual Information Center" (VIC) and by the GMSPO parts system as "Driver Information Display" (DID). The vehicle on-board diagnostic system refers to it as CRT. Obtain exchange parts for warranty service by calling one of the 26 AC-Delco shops listed in Oldsmobile Management Bulletin 91-I-14. The exchange procedure is described in Management Bulletin 90-I-12.

If code C553 is set and the CRT is functioning properly, do not attempt any repair. A fault internal to the CRT controller causes a false code C553 to set that cannot be cleared. The CRT operates normally with this fault.

If there is a complaint of loss of CRT display, follow the procedure on 8D2-77 to diagnose.

The schematic for code C553 (page 8D2-76) has been revised to correct an incorrect pin number and wire color. Refer to the illustration on the back of this bulletin for the correct schematic.