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

id0903e3804300

1

No radio reception (AM/FM)/no or low volume/Possible DTC: 09:Er20, 09:Er22
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 Step 3.
No
Go to the next step.
2
•  Measure the voltage at B+ and ACC terminals.
•  Is the voltage normal?
Specification
With ignition switch ON: 11.5 V or more
At idling: 12.5 V or more
Yes
Go to the next step.
No
Follow diagnostic procedure for symptom No. 2 (Entire audio system).
3
•  Set volume between 10 and 15.
•  Is a 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 a local broadcasting station and check the reception condition.
•  Is the reception normal?
Yes
Go to the next step.
No
Go to Step 6.
5
•  Push the PRESET buttons and check the preset conditions.
•  Have preset stations 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
•  A TV antenna located close to the audio antenna can be cause of noise. Relocate TV antenna.
Yes
Go to the next step.
No
Go to Step 8.
7
•  Remove aftermarket electronic equipment.
•  Turn the audio unit on and check the reception condition.
•  Does reception improve?
Yes
The system is normal.
(Explain to the customer that aftermarket electronic equipment is the cause of the noise)
No
Go to the next step.
8
•  Refer to confirmation Step 3, and inspect the antenna system.
•  Is a whirring sound present?
Yes
Replace audio unit.
(See CENTER PANEL UNIT REMOVAL/INSTALLATION.)
(See CENTER PANEL UNIT DISASSEMBLY/ASSEMBLY.)
(See AUDIO UNIT DISASSEMBLY/ASSEMBLY.)
No
Go to the next step.
9
•  Inspect the antenna feeder plug connection condition.
•  Is the connection normal?
Yes
Go to the next step.
No
Insert the antenna feeder plug securely.
10
•  Turn the ignition switch to the LOCK position.
•  Measure the continuity between the antenna feeder axis and ground.
•  Is there any continuity?
Yes
Replace the antenna feeder.
(See ANTENNA FEEDER LOCATION.)
No
Go to the next step.
11
•  Compare the reception with another audio unit on the same model (model/unit) under the same problem conditions.
•  Is the reception equivalent to the customer’s unit?
Note
•  Due to the following differences, you may sense a difference in reception efficiency.
(Vehicle side factor)
―  Antenna installation location, height, feeder wiring routing, optional electrical equipment
(Audio unit factor)
―  High-tone setting: Decreases effective volume range when signals become weak. (Noise is easy to be conspicuous)
―  Noise restraint setting: Widens effective volume range when signals become weak.
Yes
The system is normal.
(It is caused by electronic jamming from outside, or inferior broadcasting station signal condition.)
No
Replace audio unit.
(See CENTER PANEL UNIT REMOVAL/INSTALLATION.)
(See CENTER PANEL UNIT DISASSEMBLY/ASSEMBLY.)
(See AUDIO UNIT DISASSEMBLY/ASSEMBLY.)