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NO.1 NO RADIO RECEPTION (AM/FM)/NO OR LOW VOLUME

id0903a1804300

## Possible cause

• Jamming from aftermarket electronic equipment (two-way radio, navigation system, mobile phone, etc.)
• Audio unit malfunction
• Antenna plug poor connection
• Antenna feeder malfunction
• Electronic jamming from outside, or inferior condition of broadcasting station radio wave
• Antenna rod is not installed

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | • Turn the audio unit ON. • Is the LCD indicated correctly? | Yes | Go to the Step 3.
No | Go to the next step.
2 | • Measure voltage at +B and ACC terminals. • Is voltage okay? Specification • With ignition switch ON: 11.5V or more At idling: 12.5V or more | Yes | Go to the next step.
No | Follow diagnostic procedure for symptom No. 2 (Entire audio system).
3 | • Set volume to 10 to 15. • Is buzzing sound or voice confirmed? | Yes | Go to the next step.
No | Follow diagnostic procedure for symptom No. 3 (Entire audio system) or No. 4 (Entire audio system).
4 | • Tune to local broadcasting station and check reception condition. • Is reception okay? | Yes | Go to the next step.
No | Go to the Step 6.
5 | • Push preset buttons and check preset conditions. • Has preset been stored? | Yes | The system is normal.
No | Preset broadcasting stations.
6 | • Is aftermarket electronic equipment (two-way radio, navigation system, mobile phone, etc.) installed? Note TV antenna located closely to audio antenna can be cause of noise. Relocate TV antenna. | Yes | Go to the next step.
No | Go to the Step 8.
7 | • Remove aftermarket electronic equipment. • Turn audio unit ON and check reception condition. • Is reception improved? | Yes | The system is normal. (Explain to customers that aftermarket electronic equipment is cause of noise)
No | Go to the next step.
8 | • Refer to confirmation step 3, and inspect antenna system. • Is whirring sound present? | Yes | Replace audio unit. (SeeCENTER PANEL MODULE REMOVAL/INSTALLATION.) (SeeCENTER PANEL MODULE DISASSEMBLY/ASSEMBLY.) (SeeAUDIO UNIT DISASSEMBLY/ASSEMBLY.)
No | Go to the next step.
9 | • Inspect antenna plug connection condition. • Is connection okay? | Yes | Go to the next step.
No | Insert antenna plug securely.
10 | • Turn ignition switch to LOCK position. • Measure continuity between antenna feeder axis and ground. • Is there any continuity? | Yes | Replace antenna feeder.
No | Go to the next step.
11 | • Compare reception with other audio unit on same model (model/unit) under same problem conditions. • Is reception equivalent between customers unit and compared unit? Note • Due to following differences, you may feel difference in reception efficiency (Vehicle side factor) • Antenna installation location, height, feeder wiring routing, optional electrical equipment (Audio unit factor) • Volume concern type: It decreases change of volume when signals become weak. (Noise is easy to be conspicuous) • Noise decrease type: It decreases volume when signals become weak, so that noise is not conspicuous. | Yes | The system is normal. (It is caused by electronic jamming from outside, or inferior broadcasting station signal condition.)
No | Replace audio unit. (SeeCENTER PANEL MODULE REMOVAL/INSTALLATION.) (SeeCENTER PANEL MODULE DISASSEMBLY/ASSEMBLY.) (SeeAUDIO UNIT DISASSEMBLY/ASSEMBLY.)