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.
Audio/Video/Entertainment/Connectivity (Service Information): Amplifier: Operation
The audio power amplifier receives a fused battery current from a fuse in the rear Power Distribution Center (PDC). It is grounded through a circuit of the body wire harness secured to the body sheet metal at all times. The amplifier's internal circuitry switches the amplifier ON or OFF based upon electronic messages received over the Controller Area Network - Interior High Speed (CAN-IHS) data bus from the Radio Receiver Module (RRM) whenever the RRM is turned ON or OFF.
The amplifier receives analog sound signal inputs from the front and rear, left and right outputs of the RRM, then provides the amplified speaker outputs for each channel to the appropriate speakers through dedicated audio output circuits. The amplifier also receives electronic messages from the Body Control Module (BCM) and the RRM over the CAN-IHS data bus that communicates the correct channel settings for optimum speaker sound and output.
The hardwired circuits between components related to the amplifier may be diagnosed using conventional diagnostic tools and procedures. Refer to the appropriate wiring information. The wiring information includes wiring diagrams, wire harness routing and retention, connector pin-out information, and location views for the various wire harness connectors, splices, and grounds. For proper wire repair, and connector repair procedures. Refer to CIRCUIT TESTING PROCEDURES and CONNECTOR TERMINAL REMOVAL and CONNECTOR TERMINAL INSTALLATION .
However, conventional diagnostic methods will not prove conclusive in the diagnosis of the amplifier or the electronic controls and communication between modules and other devices that provide some features of the audio system. The most reliable, efficient and accurate means to diagnose the amplifier or the electronic controls and communication related to audio system operation requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.
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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.