Trouble Diagnosis

AUDIO


Trouble Diagnosis


NOTE:
The subwoofer (premium system) may be inoperative if the audio unit harness connectors have not been connected in the proper sequence (when the battery remains connected). The proper sequence is to connect M44 and M45 first followed by M43 last. If the subwoofer is inoperative, be sure to check this condition. Refer to Sound Is Not Heard from Subwoofer (Premium System) .
- The majority of the audio malfunctions are the result of outside causes (damaged CD, electromagnetic interference, etc.). Check the symptoms below to diagnose the malfunction.
- The vehicle itself can be a source of noise if noise prevention parts or electrical equipment is malfunctioning.
Check if noise is caused and/or changed by engine speed, ignition switch turned to each position, and operation of each piece of electrical equipment, and then determine the cause.






NOTE:
Noise resulting from variations in field strength, such as fading noise and multi-path noise, or external noise from trains and other sources. It is not a malfunction.
- Fading noise: This noise occurs because of variations in the field strength in a narrow range due to mountains or buildings blocking the signal.
- Multi-path noise: This noise results from the waves sent directly from the broadcast station arriving at the antenna at a different time from the waves that reflect off of mountains or buildings.