Component Description
| Part name | Description |
|---|---|
| Audio unit | Controls audio system and hands-free phone system functions. |
| Steering switch | Operation for audio and hands-free phone are possible. Steering switch signal (operation signal) is output to TEL adapter unit. Steering switch signal (operation signal) is output to audio unit via TEL adapter unit. |
| Front door speaker | Outputs sound signal from audio unit. Outputs high, mid and low range sounds. |
| Tweeter | Outputs sound signal from audio unit. Outputs high range sounds. |
| Rear door speaker | Outputs sound signal from audio unit. Outputs high, mid and low range sounds. |
| TEL adapter unit | Inputs the TEL voice signal from TEL antenna and outputs it to the audio unit. It is connected with the audio unit via AV communication and controlled with the audio unit. |
| TEL antenna | Receives the TEL voice signal and outputs it to the TEL adapter unit. TEL antenna is unified with a TEL adapter unit. |
| Microphone | Used for hands-free phone operation. Microphone signal is transmitted to TEL adapter unit. Power (microphone VCC) is supplied from TEL adapter unit. |
| IPod adapter | Inputs iPod sound signal from iPod®, and outputs iPod sound signal to audio unit. Receiving/transmitting of iPod® operation signals are performed as follows: between audio unit and iPod adapter: AV communication. between iPod® and iPod adapter: serial communication. |
| Antenna base | A radio antenna base integrated with radio antenna amp. and satellite radio antenna is adopted. ANTENNA AMP. Radio signal received by rod antenna is amplified and transmitted to audio unit. Power (antenna amp. ON signal) is supplied from audio unit. SATELLITE RADIO ANTENNA Receives satellite radio waves and outputs it to audio unit. |
| Satellite radio tuner | Receives radio signals from satellite radio antenna (satellite radio antenna is built into antenna base). Sends sound signals to audio unit. |
iPod® is a trademark of Apple inc., registered in the U.S. and other countries.
Scheme 1
Note. An antenna base integrated with radio antenna amp. and satellite radio antenna is adopted.
Scheme 2
Description
During on board diagnosis the diagnosis function of TEL adapter unit starts with the operation of the steering switch and performs the diagnosis when ignition switch ACC.
TEL adapter unit supplies power to microphone. The microphone transmits the sound voice to the TEL adapter unit.
Scheme 3
- CHECK CONTINUITY BETWEEN TEL ADAPTER UNIT AND MICROPHONE CIRCUIT Turn ignition switch OFF. Disconnect TEL adapter unit connector and microphone connector. Check continuity between TEL adapter unit harness connector and microphone harness connector. TEL adapter unit Microphone Continuity Connector Terminal Connector Terminal M127 7 R2 1 Existed 8 2 29 4 Check continuity between TEL adapter unit harness connector and ground. TEL adapter unit Ground Continuity Connector Terminal M127 7 Not existed 29 Is inspection result OK? YES: GO TO 2. NO: Repair harness or connector.
- CHECK VOLTAGE MICROPHONE VCC Connect TEL adapter unit connector. Turn ignition switch ON. Check voltage between TEL adapter unit harness connector and ground. Probe Standard Reference value (Approx.) (+) (-) TEL adapter unit Connector Terminal Connector Terminal M127 29 M127 8 4.7 - 5.3 V 5.0 V Is inspection result OK? YES: GO TO 3. NO: Replace TEL adapter unit. Refer to " «REMOVAL AND INSTALLATION»(ref-516455-S26793666882012120600000) ".
- CHECK MICROPHONE SIGNAL Turn ignition switch OFF. Connect microphone connector. Turn ignition switch ON. Check signal between TEL adapter unit harness connector. Probe Condition Standard Reference value (+) (-) TEL adapter unit Connector Terminal Connector Terminal M127 7 M127 8 Give a voice. Wave form synchronized with voice is input. Is inspection result OK? YES: Replace TEL adapter unit. Refer to " «REMOVAL AND INSTALLATION»(ref-516455-S26793666882012120600000) ". NO: Replace microphone. Refer to " «REMOVAL AND INSTALLATION»(ref-516455-S36178665002012120600000) ".
TEL adapter unit identifies the vehicle model according to the control signal and performs the control.
When hands-free phone is being used, TEL adapter unit transmits telephone ON signal to audio unit.
- Transmits the steering switch signal to TEL adapter unit.
- Transmits the steering switch signal to audio unit via TEL adapter unit.
- Transmits the steering switch signal to TEL adapter unit.
- Transmits the steering switch signal to audio unit via TEL adapter unit.
- Transmits the steering switch signal to TEL adapter unit.
- Transmits the steering switch signal to audio unit via TEL adapter unit.
- Transmits the steering switch signal to TEL adapter unit.
- Transmits the steering switch signal to audio unit via TEL adapter unit.
- Transmits the steering switch signal to TEL adapter unit.
- Transmits the steering switch signal to audio unit via TEL adapter unit.
- Transmits the steering switch signal to TEL adapter unit.
- Transmits the steering switch signal to audio unit via TEL adapter unit.
Satellite radio tuner and audio unit are connected with a serial communication. They transmit the operation signal from audio unit to satellite radio tuner.
Request signal transmits the signal to recognize the connection of satellite radio tuner from satellite radio tuner to audio unit.