Description And Operation
DESCRIPTION
| 1 - Amplifiers |
There are two optional 12 channel amplifiers available. Both amplifiers are located in the same location for either sound system; forward of the left front speaker enclosure. Both amplifiers look similar and can be identified by the part number or sales code.
| 1 - Amplifier |
| 2 - Electrical Connector Receptacles |
The amplifier has three electrical connector receptacles on one end that connect it to the instrument panel wire harness connectors.
OPERATION
The audio power amplifier receives fused B+ current from a fuse in the Power Distribution Center (PDC) and is grounded through a circuit of the body wire harness that is secured to the body sheet metal at all times. The internal circuitry of the amplifier switches the amplifier ON or OFF based upon electronic messages that are received over the Controller Area Network - Interior High Speed (CAN IHS) data bus from the Body Control Module (BCM) whenever the ignition switch status is ON.
The amplifier receives analog sound signal inputs from the front and rear, left and right outputs of the radio, then provides the amplified speaker outputs for each of those channels to the appropriate speakers through dedicated audio output circuits. The amplifier also receives electronic messages from the BCM and the radio over the CAN IHS data bus that communicate the correct channel settings for optimum speaker sound and output.
Hardwire Inputs
- Radio audio data
- Information 1 audio data
- Information 2 audio data
Hardwire Outputs
- Subwoofer output data
- Speaker output data
CAN IHS Inputs
- Ignition switch status
- System voltage
- Vehicle speed
- Audio source, type and level controls
- Audio mode for cabin/driver
- Audio mute status
- Park assist chime type/request/rate and volume
- Blind Spot Module (BSM) chime type/request
- Forward Collision Warning (FCW) chime type/request/rate
- Vehicle configuration and status
- Radio configuration and status
- CAN configuration and status
- Removable hard top ON/OFF status from BCM
CAN IHS Outputs
- Driver select surround status to radio
- Amplifier stored equalization curve to radio
- Surround sound available for selected cabin mode to radio