Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Theory Of Operation
The Front Passenger Display Module (FPDM) (2) allows for touchscreen input commands to the radio via a pair of Private Ethernet circuits in the 8-terminal wire harness. The FPDM is available in one size, 277.2 mm (10.9 inch). The FPDM is powered on using the ON/OFF button (3) in the Auxiliary Switch Bank Module 2 (ASBM2). The back of the FPDM houses the wire harness connections necessary for Controller Area Network - Interior High Speed (CAN-IHS) communication, Private Ethernet, power and ground circuits in one 8-terminal connector and UCI-USB circuits in the second connector which is routed to the Media Hub USB circuits.
When the FPDM is powered on using the ON/OFF button in the ASBM2, the ASBM2 sends an FPDM ON or OFF request to the Body Control Module (BCM). The BCM then sends an FPDM screen ON message to the radio via the CAN-IHS data bus. The radio then sends a CAN message to the FPDM to turn ON. When the BCM receives the ON/OFF request, it sends an LED "activate" signal back to the to the FPDM ON/OFF switch LED when the FPDM is turned ON and a "deactivate" signal when the FPDM is turned OFF.
The FPDM receives fused B+ from the interior Power Distribution Center (PDC) and continuous ground is supplied by a ground eyelet connected to a ground stud below the amplifier bracket under the driver seat. In addition, the FPDM status is broadcast over the CAN-IHS data bus to be used by the radio when the radio sends a CAN message for the status of the FPDM. The FPDM is also connected to the Security Gateway Module (SGW) on the CAN-IHS data bus.
For additional information regarding the description and operation of the Front Passenger Display Module. Refer to: FRONT PASSENGER DISPLAY MODULE, DESCRIPTION AND OPERATION .
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.