Deployable Towbar Control Module (DTCM): Notes

The Deployable Towbar Control Module (DTCM) is located in the left side of the luggage compartment, behind the trim panel. The module is located on two studs and secured with nuts.

All functions of the deployable towbar are controlled by the DTCM which responds to user requests for stow and deploy from the deployable towbar switch. A LED warning indicator in the deployable towbar switch is controlled by the DTCM. The warning indicator is illuminated in various ways to advise the user that the towbar is operating correctly or a fault condition exists.

The DTCM also controls the deployable towbar speaker, providing the user with audible warnings to advise on towbar operating or fault conditions.

The trailer lamp test switch, which is integral with the deployable towbar switch, is also connected to the DTCM. The trailer lamp test switch allows the vehicle lights and the trailer lights to be checked for correct operation by the user without assistance.

The DTCM is connected to the vehicle electrical system on the medium speed Controller Area Network body systems bus.

Power for the DTCM is supplied via a fused connection from the Rear Junction Box (RJB).

Diagnostic Trouble Codes (DTCs) are stored in the DTCM and can be read using Jaguar approved diagnostic equipment.

The DTCM is able to communicate various status and fault indicators, via an audible warning from the deployable towbar speaker and the LED indicator in the deployable towbar switch. Details of these status indicator codes are shown in the following table: