Sound Signal Circuit Between Navigation Receiver Assembly and Stereo Component Tuner Assembly

NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM (w/o USB Audio System): Sound Signal Circuit between Navigation Receiver Assembly and Stereo Component Tuner Assembly
- Sound Signal Circuit between Navigation Receiver Assembly and Stereo Component Tuner Assembly

DESCRIPTION

The stereo component tuner assembly sends sound signals to the navigation 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 navigation receiver assembly or speakers.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK STEREO COMPONENT TUNER ASSY

(a) Disconnect the D59 navigation receiver assembly connector.





(b) Using an oscilloscope, check the signal waveform between each terminal and the body ground according to the conditions, as shown in the chart below.

OK:









NG -- CHECK HARNESS AND CONNECTOR (STEREO COMPONENT TUNER ASSEMBLY - TELEVISION DISPLAY)

OK -- REPLACE NAVIGATION RECEIVER ASSEMBLY Removal

2. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT TUNER ASSEMBLY - TELEVISION DISPLAY)

(a) Disconnect the L20 stereo component tuner assembly connector.

(b) Disconnect the D59 navigation receiver assembly connector.

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

Standard Resistance (Check for Open):





Standard Resistance (Check for Short):





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE STEREO COMPONENT TUNER ASSEMBLY Removal