Lumina V6-191 3.1L VIN T MFI (1993)
Electronic Brake Control Module: Customer Interest
Brakes - ABS Light ON, DTC 46 & 86 (C1246 & C1286)
File In Section: 5 - Brakes
Bulletin No.: 73-50-26
Date: August, 1997
Subject:
ABS Light On - DTC's 46 and 86 Set
(Perform Diagnostic Procedure, Replace Center ABS Motor Pinion)
Models:
1991-97 Buick Skylark
1992-97 Buick Regal
1994-97 Buick Century
1992-96 Chevrolet Beretta, Corsica, Lumina APV
1992-97 Chevrolet Cavalier, Lumina,
1993-97 Chevrolet Camaro
1995-97 Chevrolet Monte Carlo
1997
Chevrolet Malibu, Venture
1993-97 Geo Prizm
1995-97 Geo Metro
1996-97 Geo Tracker
1991
Oldsmobile Calais
1992-96 Oldsmobile Cutlass Ciera
1992-97 Oldsmobile Achieva, Cutlass Supreme, Silhouette
1997
Oldsmobile Cutlass
1998
Oldsmobile Intrigue
1991-97 Pontiac Grand Am
1992-94 Pontiac Sunbird
1992-97 Pontiac Grand Prix, Trans Sport
1993-97 Pontiac Firebird, Trans Am
1995-97 Pontiac Sunfire
Condition
Some owners may comment that the ABS light is on with Diagnostic Trouble Codes (DTC's) 46 and 86 set (rear ABS channel will not move) as current
or history. (DTC's 46 and 86 will be displayed as C1246 and C1286 on 1997 and 1998 model year vehicles).
Cause
A condition exists where the ABS motor pack gear (pinion) will bind on the motor armature shaft causing the motor not to move when commanded by
the EBCM. This condition is aggravated by light corrosion between the pinion and shaft. Therefore, it may occur more frequently when the weather is
hot and humid.
Important:
Other EBCM and ABS motor pack concerns can also cause this condition, but they are not as common as the above cause.
Correction
