AUDIO AND VISUAL SYSTEM(w/o Multi-display) Sound Signal Circuit between Radio Receiver and Multi-media Interface ECU

DTC Code DTC Name
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 stereo component amplifier assembly, radio receiver assembly or speakers.

WIRING DIAGRAM

E187093E08

PROCEDURE

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

    1. Disconnect the H27 multi-media interface ECU connector.

    2. Disconnect the H28 radio receiver assembly connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      H27-2 (URO+) - H28-2 (CDR+)

      Always

      Below 1 Ω

      H27-3 (URO-) - H28-3 (CDR-)

      Always

      Below 1 Ω

      H27-4 (ULO+) - H28-4 (CDL+)

      Always

      Below 1 Ω

      H27-5 (ULO-) - H28-5 (CDL-)

      Always

      Below 1 Ω

      H27-1 (USD1) - Body ground

      Always

      10 kΩ or higher

      H27-2 (URO+) - Body ground

      Always

      10 kΩ or higher

      H27-3 (URO-) - Body ground

      Always

      10 kΩ or higher

      H27-4 (ULO+) - Body ground

      Always

      10 kΩ or higher

      H27-5 (ULO-) - Body ground

      Always

      10 kΩ or higher

      Result

      Result

      OK

      NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR