Last Modified: 11-29-2007 1.6 J
Service Category: Audio/Visual/Telematics Section: Audio/Video
Model Year: 2008 Model: Sequoia Doc ID: RM0000033VY003X
Title: AUDIO / VIDEO: REAR SEAT ENTERTAINMENT SYSTEM: DESCRIPTION (2008 Sequoia)

Mute Signal Circuit between Navigation Receiver Assembly and Television Display Assembly

DESCRIPTION

The navigation receiver assembly controls the volume according to the mute signal the television display assembly.

The mute signal is sent to reduce noise and popping sound generated switching the mode, etc.

WIRING DIAGRAM



INSPECTION PROCEDURE

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (TELEVISION DISPLAY - NAVIGATION RECEIVER)


(a) Disconnect the U2 television display assembly connector.

(b) Disconnect the I25 navigation receiver assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

U2-26 (MUTE) - I25-6 (MUTE)

Always

Below 1 Ω

U2-26 (MUTE) - Body ground

Always

10 kΩ or higher

(d) Reconnect the television display assembly connector.

(e) Reconnect the navigation receiver assembly connector.

OK

2.

INSPECT TELEVISION DISPLAY ASSEMBLY


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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

U2-26 (MUTE) - Body ground

Ignition switch ACC, television display is playing → Changing modes

3.5 V or higher → Below 1 V

OK