Toyota Tundra Service Manual: Data Signal Circuit between Navigation Receiver Assembly and Extension Module

Toyota Tundra Service Manual / Audio, Visual, Telematics / Navigation / Multi Info Display / Navigation System / Data Signal Circuit between Navigation Receiver Assembly and Extension Module

DESCRIPTION

The stereo component tuner assembly sends the sound data signal or image data signal from a device to the navigation receiver assembly via this circuit.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

After replacing the stereo component tuner assembly of vehicles subscribed to pay-type satellite radio broadcasts, XM radio ID registration is necessary.

PROCEDURE

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

(a) Disconnect the K1 and L1 navigation receiver assembly connectors.

(b) Disconnect the K2 and L3 stereo component tuner assembly connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
K1-1 (USV4) - K2-1 (USV4)	Always	Below 1 Ω
K1-2 (US4-) - K2-2 (US4-)	Always	Below 1 Ω
K1-3 (US4+) - K2-3 (US4+)	Always	Below 1 Ω
K1-4 (UGD4) - K2-4 (UGD4)	Always	Below 1 Ω
K1-5 (USG4) - K2-5 (USG4)	Always	Below 1 Ω
L1-4 (+B2) - L3-4 (+B2)	Always	Below 1 Ω
L1-3 (ACC2) - L3-3 (ACC2)	Always	Below 1 Ω
L1-8 (GND2) - L3-8 (GND2)	Always	Below 1 Ω
K1-1 (USV4) - Body ground	Always	10 kΩ or higher
K1-2 (US4-) - Body ground	Always	10 kΩ or higher
K1-3 (US4+) - Body ground	Always	10 kΩ or higher
K1-4 (UGD4) - Body ground	Always	10 kΩ or higher
K1-5 (USG4) - Body ground	Always	10 kΩ or higher
L1-4 (+B2) - Body ground	Always	10 kΩ or higher
L1-3 (ACC2) - Body ground	Always	10 kΩ or higher
L1-8 (GND2) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.	CHECK NO. 1 NAVIGATION WIRE

(a) Replace the No. 1 navigation wire with a known good one.

for Column Shift Type: See page

for Floor Shift Type: See page

(b) Check that the malfunction disappears.

OK:

Malfunction disappears.

END (NO. 1 NAVIGATION WIRE IS DEFECTIVE)

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

Data List / Active Test

Data Signal Circuit between Navigation Receiver Assembly and Stereo Jack Adapter

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Toyota Tundra Service Manual: Data Signal Circuit between Navigation Receiver Assembly and Extension Module

Data List / Active Test

Data Signal Circuit between Navigation Receiver Assembly and Stereo Jack Adapter

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