Toyota 4Runner manuals

Toyota 4Runner: Mute Signal Circuit between Stereo Component Amplifier and Telematics Transceiver

Toyota 4Runner Service Manual / Audio / Visual / Telematics / Navigation / Multi Info Display / Navigation System / Mute Signal Circuit between Stereo Component Amplifier and Telematics Transceiver

DESCRIPTION

The DCM (telematics transceiver) sends a mute signal to the stereo component amplifier assembly.

The stereo component amplifier assembly controls the volume according to the mute signal from the DCM (telematics transceiver).

WIRING DIAGRAM


PROCEDURE

1.

INSPECT DCM (TELEMATICS TRANSCEIVER)

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

F39-17 (MUTE) - Body ground

Ignition switch ACC, audio system is playing

→ Emergency call mode

Above 3.5 V

→ Below 1 V

Text in Illustration

*a

Component with harness connected

(DCM (Telematics Transceiver))



OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

2.

CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - DCM (TELEMATICS TRANSCEIVER))

(a) Disconnect the N11 stereo component amplifier assembly connector.

(b) Disconnect the F39 DCM (telematics transceiver) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

N11-24 (TMUT) - F39-17 (MUTE)

Always

Below 1 Ω

N11-24 (TMUT) - Body ground

Always

10 kΩ or higher


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

INSPECT STEREO COMPONENT AMPLIFIER ASSEMBLY

(a) Reconnect the N11 stereo component amplifier assembly connector.

(b) Disconnect the F39 DCM (telematics transceiver) connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

F39-17 (MUTE) - Body ground

Ignition switch ACC

Above 3.5 V

Text in Illustration

*a

Front view of wire harness connector

(to DCM (Telematics Transceiver))



OK

REPLACE DCM (TELEMATICS TRANSCEIVER)


NG

REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY

Mute Signal Circuit between Navigation Receiver Assembly and Stereo Component Amplifier
DESCRIPTION This circuit sends a signal to the stereo component amplifier assembly to mute noise. Because of that, the noise produced by changing the sound source ceases. If there is an open in th ...

AVC-LAN Circuit
DESCRIPTION Each unit of the navigation system connected to the AVC-LAN (communication bus) transfers the switch signals using the AVC-LAN. If a short to +B or short to ground occurs in the AVC-LA ...

Other materials about Toyota 4Runner:

Operating a Bluetooth® enabled portable player
Selecting an album Press “∨” or “∧” on . Selecting tracks Press “∧” or “∨” on . Playing and pausing tracks Press . Fast-forwarding and reversing tracks Press and hold “∧” or “∨” on . Switching the display Press . ...

Reassembly
REASSEMBLY PROCEDURE 1. INSTALL GENERATOR DRIVE END FRAME BEARING (a) Using SST and a press, press in a new generator drive end frame bearing. SST: 09950-60010 09951-00470 SST: 09950-70010 09951-07100 ...

© 2016-2020 | www.to4runner.net

0.0037