Steering Wheel and Column Electrical Components - System Operation and Component Description — 2016 workshop reference 3381

START

If the brake pedal is applied when the START/STOP button is pressed with the ignition in the off mode, the vehicle temporarily goes into the START mode so long as a valid programmed key is detected within the vehicle.

In addition to activating the run/start relay, the BCM communicates the ignition mode to the other modules by sending an ignition status message over the CAN.

Once the ignition has entered START mode, the ignition mode indicator in the ignition switch illuminates.

The engine can be started from any ignition mode.

System Diagram - Steering Column Lock

Steering Wheel and Column Electrical Components - System Operation and Component Description — original illustration 1, reference 3381Original colors & callouts · Select to enlarge

Network Message Chart - Steering Column Lock

BCM Network Input Messages

Broadcast Message	Originating Module	Message Purpose
Engine rpm data	PCM	Provides the BCM with the engine speed to indicate if it is running or not.
Wheel rotation count	ABS module	Provides the BCM with the vehicle speed to indicate if it is moving or stationary.

Steering Column Lock

The steering column lock is used to deter vehicle theft by electronically locking the steering column. This prevents the steering wheel from being rotated to turn the front wheels.

The steering column unlocks when:

the passive entry feature is used to open the driver door. the driver door is opened after unlocking the vehicle with a RKE transmitter. the START/STOP button is pressed and a valid programmed passive key is detected. the remote start feature is activated.

The steering column locks after:

the ignition is turned off and 45 seconds have elapsed since the delayed accessory feature has turned off. 45 seconds have elapsed since the remote feature turns off the vehicle.

The BCM controls the voltage provided to the steering column lock module using a relay (located in the BJB) and communicates with it over a LIN. The BCM monitors input from various systems to determine when to send a command to lock or unlock the steering column. The steering column lock module locks and unlocks the steering

Source reference 3381

2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.