Toyota RAV4 manuals

Toyota Sienna Service Manual: Mute Signal Circuit between Radio and Navigation Assembly and Stereo Component Amplifier

Toyota Sienna Service Manual / Navigation / Navigation system / Diagnostic trouble code chart / Mute Signal Circuit between Radio and Navigation Assembly and Stereo Component Amplifier

DESCRIPTION

This circuit sends a signal to the stereo component amplifier to mute noise. Because of that, the noise produced by changing the sound source ceases.

If there is an open in the circuit, noise can be heard from the speakers when changing the sound source.

If there is a short in the circuit, even though the stereo component amplifier is normal, no sound, or only an extremely small sound, can be produced.

WIRING DIAGRAM

WIRING DIAGRAM

INSPECTION PROCEDURE

1 INSPECT STEREO COMPONENT AMPLIFIER

INSPECT STEREO COMPONENT AMPLIFIER

  1. Measure the voltage according to the value(s) in the table below.

Standard voltage

Standard voltage

2 CHECK HARNESS AND CONNECTOR (RADIO AND NAVIGATION ASSEMBLY - STEREO COMPONENT AMPLIFIER)

CHECK HARNESS AND CONNECTOR (RADIO AND NAVIGATION ASSEMBLY - STEREO COMPONENT AMPLIFIER)

  1. Disconnect the radio and navigation assembly connector R15 and television display assembly connector S11.
  2.  Measure the resistance according to the value(s) in the table below.

Standard resistance

Standard resistance

3 REPLACE STEREO COMPONENT AMPLIFIER

  1. Replace the stereo component amplifier and check if it operates normally.

OK: The navigation system operates normally

REPLACE RADIO AND NAVIGATION ASSEMBLY

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