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.)

Antenna Circuit:

TECHNICAL DESCRIPTION (COMMENT)
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.

TROUBLESHOOTING HINTS
- Malfunction of roof antenna (antenna rod, antenna base)
- Antenna feeder malfunction
- Malfunctions of audio visual navigation unit
- The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector

DIAGNOSIS

STEP 1. Check the state of the antenna rod and antenna base.

Q: Is the roof antenna assembled?

YES : Go to Step 2.

NO : Assemble antenna rod and antenna base.

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 : Replace the antenna rod, antenna base and antenna fender.

STEP 6. Check audio visual navigation unit connector C-11 and radio antenna connector C-15 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Are audio visual navigation unit connector C-11 and radio antenna connector C-15 in good condition?

YES : Go to Step 7.

NO : Repair or replace the damaged component(s).

STEP 7. Check the wiring harness between audio visual navigation unit connector C-11 (terminal 81) and radio antenna connector C-15 (terminal 1).

- Check the communication line for open circuit and short circuit.

NOTE: Also check intermediate connector C-105 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-105 is damaged, repair or replace the connector.

Q: Is the wiring harness between audio visual navigation unit connector C-11 (terminal 81) and radio antenna connector C-15 (terminal 1) in good condition?

YES : Go to Step 8.

NO : The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.

STEP 8. 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 antenna rod and antenna base.