INSPECTION PROCEDURE 11: Some Noise Appears When There is Vibration or Shocks During Traveling.: Diagnosis

STEP 1. Check radio and CD player connector C-103 for damage.
Q: Is radio and CD player connector C-103 in good condition?
1. YES: Go to Step 2.
2. NO: Repair or replace the connector. Refer to HARNESS CONNECTOR INSPECTION . Check that there is no noise.
Fig 1: Identifying C-103 Terminal Connectors
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
STEP 2. Check that noise appear when the radio switch is turned on while the vehicle is stopped and the radio is tapped while tuned away from a station.
NOTE: Static electricity noise: Body static electric from the shock absorber rubber bushings used to prevent vibration, tires, etc. occurs because of separation from the ground, causing a buzzing noise. Since no measures can be taken to discharge the static electricity of the vehicle body. Check that there is no noise.

Q: Does noise appear when the radio switch is turned on while the vehicle is stopped and the radio is tapped while tuned away from a station?
1. YES: Go to Step 3.
2. NO: It may be static electricity noise.
STEP 3. Check that the radio correctly grounded.
The radio is connected to the ground with an assembling screw.

Q: Is the radio correctly grounded?
1. YES: Go to Step 4.
2. NO: Tighten the screw securely. Check that there is no noise.
STEP 4. Check by replacing radio and CD player.
Q: Are operations normal when using another radio and CD player?
1. YES: Either repair or replace the radio and CD player. Check that there is no noise.
2. NO: Either repair or replace the antenna assembly. Check that there is no noise.