EXPERTEC TSB (318113)
Publication date: 1993-04-05Reference number: 318113
EXPERTEC TSB
TECHNICAL SERVICE BULLETIN
CRANK (OR NO CRANK) AND NO - START AND/OR NO START
Model(s): 1986-91 CADILLAC ELDORADOS 1986-91 CADILLAC SEVILLES
1986-93 BUICK RIVIERAS 1986-92 OLDSMOBILE TORONADOS
Bulletin No.: Oldsmobile 318113, Buick 318113, Cadillac 318113
Date: 04/05/1993
CONDITION
Some owners of 1986-1989 Cadillac Eldorados and Sevilles, and 1986-1993 Buick Rivieras and 1986-1992 Oldsmobile Toronados may experience a condition of a crank but no start and possibly a BCM code 334 set; or some 1990-1991 Eldorados, Sevilles, and 1986-1993 Rivieras or 1986-1992 Toronados may experience a no crank and no start condition and possibly a BCM code 334 set. This condition may be caused by a corroded splice on circuit 480 at fusible link B (Cadillac) or fusible link J (Riviera and Toronado), located at the ISO power junction block. See Fig 1 .
CAUSE
Circuit 480 and fusible link B or J is the "hot at all times" feed to the ECM on all model years. In 1990, circuit 480 and fusible link B or J also became the "hot at all times" feed to the passkey module. This is the reason for the addition of the no crank condition to the 1990 - 1993 model years.
CORRECTION
To repair this condition repair fusible link splice as outlined in section 8A-5 of the service information manual.
For vehicles repaired under warranty use labor operation N6270. Use published labor operation time.
See Fig 1