AUDIO AND VISUAL SYSTEM(w/o Navigation System) 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

A01X9ZBE07
*a (Shielded)
*b Multi-media Interface ECU
*c Radio Receiver Assembly

PROCEDURE


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


    1. Disconnect the F55 radio receiver assembly and L40 multi-media interface ECU connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L40-1 (USD1) - F55-1 (CSLD) Always Below 1 Ω
      L40-2 (URO+) - F55-2 (CDR+) Always Below 1 Ω
      L40-3 (URO-) - F55-3 (CDR-) Always Below 1 Ω
      L40-4 (ULO+) - F55-4 (CDL+) Always Below 1 Ω
      L40-5 (ULO-) - F55-5 (CDL-) Always Below 1 Ω
      L40-1 (USD1) - Body ground Always 10 kΩ or higher
      L40-2 (URO+) - Body ground Always 10 kΩ or higher
      L40-3 (URO-) - Body ground Always 10 kΩ or higher
      L40-4 (ULO+) - Body ground Always 10 kΩ or higher
      L40-5 (ULO-) - Body ground Always 10 kΩ or higher

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR