Component Description
| Part name | Description |
|---|---|
| Audio unit | Controls audio system functions Inputs AM/FM radio wave signal from rod antenna Inputs vehicle speed signal from combination meter Inputs steering switch signal Inputs hands-free phone functions from Bluetooth® control unit Outputs sound signal to front door speakers |
| Bluetooth® control unit | Controls hands-free phone and audio system functions Inputs steering switch signal Inputs microphone voice signal Outputs steering switch signal to audio unit Outputs hands-free phone functions to audio unit |
| Microphone | Used for hands-free phone operation Microphone voice signal is output to Bluetooth® control unit Inputs microphone voice signal |
| Steering wheel audio control switches | Operation for audio and hands-free phone are possible Outputs steering switch signal to Bluetooth® control unit |
| Front door speakers | Outputs sound signal from audio unit Outputs high, mid and low-range sounds |
| Rear door speakers | Outputs sound signal from audio unit Outputs high, mid and low-range sounds |
| IPod adapter | Receives audio signals from iPod connector Outputs audio signals to audio unit |
| Combination meter | Outputs vehicle speed signal to audio unit |
| Rod antenna | Receives AM/FM radio wave signals and outputs signals to audio unit |
| Bluetooth® antenna | Receives telephone wave signals and outputs signals to Bluetooth® control unit |
Scheme 1
HANDS-FREE PHONE SYSTEM: System Description
Refer to the Owner's Manual for Bluetooth® telephone system operating instructions.
Note. Cellular telephones must have their wireless connection set up (paired) before using the Bluetooth® telephone system.
Bluetooth® telephone system allows users who have a Bluetooth® cellular telephone to make a wireless connection between their cellular telephone and the Bluetooth® control unit. Hands-free cellular telephone calls can be sent and received. Some Bluetooth® cellular telephones may not be recognized by the Bluetooth® control unit. When a cellular telephone or the Bluetooth® control unit is replaced, the telephone must be paired with the Bluetooth® control unit. Different cellular telephones may have different pairing procedures. Refer to the cellular telephone operating manual.
Diagnosis Description
The Bluetooth® control unit has two diagnostic checks. The first diagnostic check is performed automatically every ignition cycle during control unit initialization. The second diagnostic check is performed by the technician using the steering wheel audio control switches prior to trouble diagnosis.
Description
The audio unit sends sound signals to the front door speakers using the front door speaker circuits.
The audio unit sends audio signals to the rear door speakers using the rear door speaker circuits.
When one of the steering wheel audio control switches is pushed, the resistance in steering switch circuit changes depending on which button is pushed.
Voice signals are transmitted from the microphone to the Bluetooth® control unit using the microphone signal circuits.
The majority of the audio troubles are the result of outside causes (bad CD, electromagnetic interference, etc.).