INSPECTION PROCEDURE 14: Some Noise Appears When There is Vibration or Shocks during Traveling: Diagnosis

STEP 1. Check the fit of the antenna.
Q: Is the antenna base fitted securely?
- YES: Go to Step 2.
- NO: Install the antenna, and tighten the mounting nut (Refer to REMOVAL AND INSTALLATION ).
STEP 2. Check the fit of antenna feeder cable.
Q: Is the antenna feeder cable fitted securely?
- YES: Go to Step 3.
- NO: Ensure that the antenna base and the radio and CD player are fitted securely.
STEP 3. Check radio and CD player connector C-104, C-105 and amplifier connector D-25, D-26 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are radio and CD player connector C-104, C-105 and amplifier connector D-25, D-26 in good condition?
- YES: Go to Step 4.
- NO: Repair or replace the damaged component(s). Refer to HARNESS CONNECTOR INSPECTION .
STEP 4. Check that noise appears when the radio switch is turned on while the vehicle is stopped and the radio is tapped while tuned away from a station.
NOTE: Body static electricity 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?
- YES: Go to Step 5.
- NO: It may be static electricity noise.
STEP 5. Verify that the radio is correctly grounded.
The radio is connected to the ground with an assembling screw.

Q: Is the radio correctly grounded?
- YES: Go to Step 6.
- NO: Tighten the screw securely.
STEP 6. Check by replacing radio and CD player.
Q: Do the other radio and CD player work normally?
- YES: Either repair or replace the original radio and CD player.
- NO: Either repair or replace the antenna assembly.