Diagnostic Procedure

WARNING: This page is about a different car, the 2012 Mitsubishi Lancer. However, it is still accessible from the selected car via links, so may be relevant.

STEP 1. Check the state of the antenna.
Check that there is no damage or crack in the roof antenna.

Q: Is the check result normal?
- YES: Go to Step 2.
- NO: Repair or replace the roof antenna.
STEP 2. Check that the noise occurs when the engine is stopped or the engine is running.
Q: Does noise occur when the engine is stopped or the engine is running?

When the engine is stopped: Go to Step 3.

When the engine is running: Check the vehicle's noise suppressor (Refer to INSPECTION PROCEDURE 13 ).
STEP 3. Check that the noise fades away by the following actions.
1. Tune to a station with a stronger wave.
2. Adjust the sound quality to suppress high tones.
  Q: Is the noise eliminated?
  - YES: This diagnosis is complete.
  - NO: Go to Step 4.
STEP 4. Check that the radio and CD player is correctly grounded
The radio is connected to the ground with an assembling screw.

Q: Is the radio correctly grounded?
- YES: Go to Step 5.
- NO: Assemble the radio and CD player into the vehicle.
STEP 5. Check the antenna plug is connected to the radio and CD player.
Q: Is the antenna plug thoroughly connected to the radio and CD player?
- YES: Go to Step 7.
- NO: Go to Step 6.
STEP 6. Check that the noise is eliminated when the antenna plug is properly attached.
Q: Is the noise eliminated?
- YES: This diagnosis is complete.
- NO: Go to Step 7.
STEP 7. Check that the antenna is in good condition and is it properly mounted.
Q: Is the antenna in good condition and is it properly mounted?
- YES: Consult the radio manufacturer's service center.
- NO: Repair or replace the roof antenna.