Toyota Tundra Service Manual: Sound Signal Circuit between Navigation Receiver Assembly and Stereo Component Amplifier

Toyota Tundra Service Manual / Audio, Visual, Telematics / Navigation / Multi Info Display / Navigation System / Sound Signal Circuit between Navigation Receiver Assembly and Stereo Component Amplifier

DESCRIPTION

The navigation receiver assembly sends a sound signal to the stereo component amplifier assembly via this circuit.

The sound signal that has been sent is amplified by the stereo component amplifier assembly, and then is sent to the speakers.

WIRING DIAGRAM

PROCEDURE

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

(a) for 7 or 9 Speakers:

(1) Disconnect the J134 and J133 navigation receiver assembly connectors.

(2) Disconnect the J145 stereo component amplifier assembly connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
J133-2 (FL+) - J145-1 (FL+)	Always	Below 1 Ω
J133-6 (FL-) - J145-6 (FL-)	Always	Below 1 Ω
J133-1 (FR+) - J145-2 (FR+)	Always	Below 1 Ω
J133-5 (FR-) - J145-7 (FR-)	Always	Below 1 Ω
J134-2 (RL+) - J145-3 (RL+)	Always	Below 1 Ω
J134-6 (RL-) - J145-8 (RL-)	Always	Below 1 Ω
J134-1 (RR+) - J145-9 (RR+)	Always	Below 1 Ω
J134-3 (RR-) - J145-10 (RR-)	Always	Below 1 Ω
J133-2 (FL+) - Body ground	Always	10 kΩ or higher
J133-6 (FL-) - Body ground	Always	10 kΩ or higher
J133-1 (FR+) - Body ground	Always	10 kΩ or higher
J133-5 (FR-) - Body ground	Always	10 kΩ or higher
J134-2 (RL+) - Body ground	Always	10 kΩ or higher
J134-6 (RL-) - Body ground	Always	10 kΩ or higher
J134-1 (RR+) - Body ground	Always	10 kΩ or higher
J134-3 (RR-) - Body ground	Always	10 kΩ or higher

(b) for 12 Speakers:

(1) Disconnect the J134 and J133 navigation receiver assembly connectors.

(2) Disconnect the J141 stereo component amplifier assembly connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
J133-6 (FL-) - J141-2 (L-)	Always	Below 1 Ω
J133-2 (FL+) - J141-3 (L+)	Always	Below 1 Ω
J133-5 (FR-) - J141-4 (R-)	Always	Below 1 Ω
J133-1 (FR+) - J141-5 (R+)	Always	Below 1 Ω
J133-6 (FL-) - Body ground	Always	10 kΩ or higher
J133-2 (FL+) - Body ground	Always	10 kΩ or higher
J133-5 (FR-) - Body ground	Always	10 kΩ or higher
J133-1 (FR+) - Body ground	Always	10 kΩ or higher
J134-4 (SLD2) - Body ground	Always	10 kΩ or higher

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

REPAIR OR REPLACE HARNESS OR CONNECTOR

Sound Quality is Bad Only when Disc is Played (Volume is Too Low)

Sound Signal Circuit between Navigation Receiver Assembly and Stereo Jack Adapter

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