SWITCH - REMOTE RADIO
DESCRIPTION
Two rocker-type switches (2) are mounted in the sides of the rear (instrument panel side) steering wheel trim cover. The switch on the left spoke is the seek switch and has seek up, seek down, and preset station advance functions. The switch on the right spoke is the volume control switch and has volume up, and volume down functions. The switch on the right spoke also includes a “mode” control that allows the driver to sequentially select AM radio, FM radio, cassette player or CD player.
OPERATION
The six switches in the two remote radio switch units are normally open, resistor multiplexed momentary switches that are hard wired to the Instrument cluster through the clockspring. The instrument cluster sends a five volt reference signal to both switch units on one circuit, and senses the status of all of the switches by reading the voltage drop on a second circuit.
When the instrument cluster senses an input (voltage drop) from any one of the remote radio switches, it sends the proper switch status messages on the Controller Area Network (CAN) data bus to the radio. The electronic circuitry within the radio is programmed to respond to these remote radio switch status messages by adjusting the radio settings as requested.
REMOVAL
WARNING: Disable the airbag system before attempting any steering wheel, steering column, seat belt tensioner, side airbag, or instrument panel component diagnosis or service. Disconnect and isolate the battery negative (ground) cable, then wait two minutes for the airbag system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the airbag system. Failure to take the proper precautions could result in accidental airbag deployment and possible personal injury.
1. Disconnect and isolate the battery negative cable.
2. Remove the driver side airbag (5) from the steering wheel (1). (Refer to 8 - ELECTRICAL/RESTRAINTS/DRIVER AIRBAG - REMOVAL).
3. Remove the speed control switch (3) or (6) located on the same side of the steering wheel as the remote radio switch that is being serviced. (Refer to 8 - ELECTRICAL/SPEED CONTROL/SWITCH - REMOVAL).
4. Disconnect the steering wheel wire harness connector from the connector receptacle of the remote radio switch .
5. Disengage the four remote radio switch latches that secure the switch to the inside of the mounting hole in the steering wheel rear trim cover .
6. From the outside of the steering wheel rear trim cover, remove the remote radio switch (2) from the trim cover.
INSTALLATION
1. Position the remote radio switch (2) to the mounting hole on the outside of the steering wheel rear trim cover. Be certain that the connector receptacle is oriented toward the bottom of the switch and pointed toward the center of the steering wheel.
2. Press firmly and evenly on the remote radio switch until each of the switch latches is fully engaged in the mounting hole of the steering wheel rear trim cover.
3. Reconnect the steering wheel wire harness connector to the connector receptacle of the remote radio switch.
4. Install the speed control switch (3) (6) onto the steering wheel. (Refer to 8 - ELECTRICAL/SPEED CONTROL/SWITCH - INSTALLATION).
5. Install the driver side airbag (5) to the steering wheel (1). (Refer to 8 - ELECTRICAL/RESTRAINTS/DRIVER AIRBAG - INSTALLATION).
6. Connect the battery negative cable.