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.

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

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

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

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.

OK

END (NO. 1 NAVIGATION WIRE IS DEFECTIVE)

NG

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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