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STEP 3. Check that the noise fades away when the Q:Does the noise fade away when the vehicle harness is moved any from the radio (If the harness is not in the proper position)? YES: Consult the radio manufacturer's service center. NO: If there is more noise than other radios, consult the radio manufacturer's service Inspection Procedure 7: Noise is overpowering both AM and FM. M15410800032USA0000010000 DIAGNOSIS STEP 1. Check the state of the antenna. Q:Is the mast antenna assembled? YES: Go to Step 2. NO: Assemble the mast antenna. Check to see that the noise is gone. STEP 2. Verify that the noise occur when the Q:Does noise occur when the engine is stopped ? YES(When the engine is stopped): Go to Step 3. NO(When the engine is running): Check the vehicle's noise suppressor. (Refer to STEP 3. Verify that the following actions (1) Tune to a station with a stronger wave. (2) Extend the antenna completely (Mast antenna). (3) Adjust the sound quality to suppress high tones. Q:Is the noise eliminated? YES: Consult the radio manufacturer's service center. NO: Go to Step 4. STEP 4. Verify that the radio is correctly grounded Q:Is the radio correctly grounded? YES: Go to Step 5. NO: Consult the radio manufacturer's service center. STEP 5. Check the connection of the antenna plug 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. Verify that the noise is eliminated when Q:Is the noise eliminated? YES: Consult the radio manufacturer's service center. NO: Go to Step 7. STEP 7. Verify that the antenna is in good Q:Is the antenna in good condition and is it properly mounted? YES: Consult the radio manufacturer's service center. NO: Either repair or replace the antenna assembly. Check to see that the noise is gone. Inspection Procedure 8: Excessive noise on AM and FM. M15410800033USA0000010000 DIAGNOSIS AUDIO AND NAVIGATION SYSTEM 54B-53 DIAGNOSIS |