Engine Controls - Service Manual Chart Update Code 52
Bulletin 86-6E-16Date Aug. '86
Ref. No. 86-153-6E
SUBJECT: 1986 SERVICE MANUAL CHART UPDATE CODE 52
MODELS AFFECTED: 1986 "A", "J", "N", "H", "C"
NOTE: This information supersedes all previously published Service Manual revisions.
This is a correction of the Code 52 Chart found on pages:
6E3-A1-64 (Dated 9-12-84) - "A" and "J" Series
6E3-A2-64 (Dated 2-10-86) - "N" and "H" Series
6E3-A3-76 (Dated 2-10-86) - "A", "C", and "H" Series
of the 1986 Buick Chassis Service Manual (Volume 1).
Please make this change in your Service Manual.
CODE 52 CALPAK ERROR
CHECK THAT ALL PINS ARE FULLY INSERTED IN THE SOCKET. IF OK, REPLACE CALPAK, CLEAR MEMORY, AND RECHECK. IF CODE 52 REAPPEARS, REPLACE ECM.
CLEAR ALL CODES AND CONFIRM "CLOSED LOOP" OPERATION AND NO "SERVICE ENGINE SOON" LIGHT