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:

Normal Operation

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.

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

The restraints control module (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.