Tests AF: LFC 57/DTC B2986 - Deployable Steering Column Circuit Short to Ground

PINPOINT TEST AF: LFC 57/DTC B2986 - DEPLOYABLE STEERING COLUMN CIRCUIT SHORT TO GROUND

AF1-AF3:

AF3-AF5:

AF6:

NOTE: If the deployable steering column electrical connector becomes damaged or the deployable steering column has deployed, a new overlay wiring harness must be installed. Make sure to follow the installation instructions that are included in the service kit.

Normal Operation
As part of the SRS, the vehicle is equipped a deployable steering column. The restraints control module (RCM) will deploy (collapse) the steering column during a frontal collision when seat position information and other parameters reach predetermined limits.

The RCM checks the deployable steering column circuits for faults. If the RCM detects a short to ground on either circuit, it will store diagnostic trouble code (DTC) B2986 in memory and flash lamp fault code (LFC 57) on the air bag indicator.

Possible Causes
A deployable steering column short to ground circuit fault can be caused by:
- wiring, terminals or connectors.
- a faulty deployable steering column.
- a faulted RCM.