Toyota Tundra Service Manual: Navigation Voice Circuit

Toyota Tundra Service Manual / Audio, Visual, Telematics / Navigation / Multi Info Display / Navigation System / Navigation Voice Circuit

DESCRIPTION

This circuit is used when the voice guidance in the navigation system is on or an incoming cellular phone voice in the "Bluetooth" hands-free system is heard.

Using this circuit, the navigation receiver assembly sends the signals to the stereo component amplifier assembly.

WIRING DIAGRAM

PROCEDURE

1.

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

(a) Disconnect the J134 navigation receiver assembly connector.

(b) Disconnect the J141 stereo component amplifier connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J141-23 (II1+) - J134-2 (RL+)

Always

Below 1 Ω

J141-22 (II1-) - J134-6 (RL-)

Always

Below 1 Ω

J141-23 (II1+) - Body ground

Always

10 kΩ or higher

J141-22 (II1-) - Body ground

Always

10 kΩ or higher

J141-6 (SLD) - Body ground

Always

10 kΩ or higher
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
    Navigation Receiver Assembly Power Source Circuit

    No Sound can be Heard from Speakers

    See More:

    Toyota Tundra Service Manual > Navigation System: Voice Recognition Microphone Disconnected (B1579)
    DESCRIPTION The navigation receiver assembly and telephone microphone assembly are connected to each other using the microphone connection detection signal lines. This DTC is stored when a microphone connection detection signal line is disconnected. DTC Code DTC Detection Condition Trouble Area B157 ...

    Toyota Tundra Owners Manual

    Toyota Tundra Service Manual

    © 2026 Copyright www.ttundra.com
    0.0094