AUDIO AND VISUAL SYSTEM (for Radio Receiver Type) Sound Signal Circuit between Radio Receiver and Multi-media Interface ECU

DESCRIPTION

The multi-media interface ECU sends sound signals to the radio receiver assembly through this circuit.

If there is an open or short in the circuit, sound cannot be heard from the speakers even if there is no malfunction in the radio receiver assembly or speakers.

WIRING DIAGRAM

A01ISQME01

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (MULTI-MEDIA INTERFACE ECU - RADIO RECEIVER)


    1. A01IQ3XE01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Multi-media Interface ECU)
      *2

      Front view of wire harness connector

      (to Radio Receiver Assembly)

      Disconnect the H99 multi-media interface ECU connector.

    2. Disconnect the H103 radio receiver assembly connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      H99-1 (USD1) - H103-1 (CSLD) Always Below 1 Ω
      H99-2 (URO+) - H103-2 (CDR+) Always Below 1 Ω
      H99-3 (URO-) - H103-3 (CDR-) Always Below 1 Ω
      H99-4 (ULO+) - H103-4 (CDL+) Always Below 1 Ω
      H99-5 (ULO-) - H103-5 (CDL-) Always Below 1 Ω
      H99-1 (USD1) - Body ground Always 10 kΩ or higher
      H99-2 (URO+) - Body ground Always 10 kΩ or higher
      H99-3 (URO-) - Body ground Always 10 kΩ or higher
      H99-4 (ULO+) - Body ground Always 10 kΩ or higher
      H99-5 (ULO-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here