B2904

DTC B2904





Circuit Description
The Steering Column Tilt/Telescoping Module (SCM) receives an input from the tilt/telescope switch when the switch is pressed. The SCM recognizes this input and supplies battery voltage and ground to the tilt motor up or down circuit or the telescope motor in or out circuit depending on which direction of movement is requested. Both motors are reversible and the voltage and ground applied to the circuits are simply reversed to accomplish movement in opposite directions.

Conditions for Running the DTC
With the ignition switch ON, the SCM checks the switch inputs every 30 seconds regardless of source voltage.

Conditions for Setting the DTC
When the SCM detects two simultaneous inputs for more than two seconds, the module considers the inputs invalid and sets the DTC.

Action Taken When the DTC Sets
^ The SCM no longer moves the steering column in the direction of the invalid inputs.
^ The SCM continues to respond to inputs from he other manual switches.

Conditions for Clearing the DTC
^ The SCM no longer receives two simultaneous switch inputs.
^ Use the scan tool to clear the DTC.

Diagnostic Aids
An intermittently stuck switch can cause this DTC to set.