AUDIO AND VISUAL SYSTEM (w/o Microphone) Speaker Circuit

DESCRIPTION

Sound signals that have been amplified by the stereo component amplifier are sent to the speakers from the radio receiver through this circuit. If there is a short in this circuit, the sound cannot be heard from the speakers even though there is no malfunction in the speakers.

WIRING DIAGRAM

A01378IE03

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT FRONT SPEAKER NO.1


    1. Measure the resistance between the terminals of the speaker.

      Note

      Do not remove the speakers for checking.

      Standard
      Approximately 4 Ω

    2. Check that the malfunction disappears when another speaker in good condition is installed.

      OK
      The malfunction disappears.

      Tech Tips


      • Connect all the connectors to the speakers.

      • When there is a possibility that either the left or right front speaker is defective, inspect by interchanging the left and right speakers.


    NG

    REPLACE FRONT SPEAKER NO.1

    OK

  2. CHECK HARNESS AND CONNECTOR


    1. A0138JKE01

      Disconnect the C18 radio receiver connector.

    2. Disconnect the C3 and C10 speaker connectors.

    3. Check the resistance.

      Standard Resistance
      Tester Connection Specified Condition
      FL+ (C18-5) - C3-1 Below 1 Ω
      FL- (C18-6) - C3-2 Below 1 Ω
      FR+ (C18-3) - C10-1 Below 1 Ω
      FR- (C18-4) - C10-2 Below 1 Ω
      FL+ (C18-5) or C3-1 - Body ground 10 kΩ or higher
      FL- (C18-6) or C3-2 - Body ground 10 kΩ or higher
      FR+ (C18-3) or C10-1 - Body ground 10 kΩ or higher
      FR- (C18-4) or C10-2 - Body ground 10 kΩ or higher

    4. Reconnect the radio receiver connector.

    5. Reconnect the speaker connectors.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE