Inspection Procedure 6

Inspection Procedure 6: The AM/FM Radio Broadcasting cannot be Received.

CAUTION: Before replacing the audio visual navigation unit, ensure that the power supply circuit, the ground circuit, and the communication circuit are normal. (Check that the voltage is 10 V or more.)

COMMENTS ON TROUBLE SYMPTOM
In case of AM/FM radio broadcasting cannot be received., the roof antenna (antenna rod, antenna base), antenna fender or audio visual navigation unit may have a problem.

NOTE: The radio wave may not be received if the vehicle is placed in the area which is exposed to a special electric field. Thus, check that the radio broadcasting can be received using the radio of another vehicle before carrying out diagnosis.

PROBABLE CAUSES
- Malfunction of roof antenna (antenna rod, antenna base)
- Antenna feeder malfunction
- Malfunctions of audio visual navigation unit

DIAGNOSIS PROCEDURE

STEP 1. Check the state of the roof antenna.

Q: Is the roof antenna assembled?

YES : Go to Step 2.

NO : Assemble the antenna.

STEP 2. Check to see if inspections are taking place is an area exposed to special electric fields.

Q: Is the reception area exposed to special electric fields?

YES : Go to Step 3.

NO : Go to Step 4.

STEP 3. Move the vehicle and check the radio.

Move the vehicle to a good reception area that is not exposed to special electric fields.

Q: Is the check result normal?

YES : Diagnosis complete.

NO : Go to Step 4.

STEP 4. Check damage in the roof antenna (the antenna rod, the antenna base).

Q: Is the check result normal?

YES : Go to Step 5.

NO : Replace antenna rod or antenna base.

STEP 5. Check the connection of the antenna plug and audio visual navigation unit.

Q: Is the check result normal?

YES : Go to Step 6.

NO : Thoroughly connect the antenna plug and the audio visual navigation unit.

STEP 6. Substitute a known good audio visual navigation unit, and check the trouble symptom.

Q: Is the check result normal?

YES : Replace the audio visual navigation unit.

NO : Either repair or replace the roof antenna assembly.