Toyota Tundra Service Manual: Display Signal Circuit between Radio Receiver and Extension Module

Toyota Tundra Service Manual / Audio, Visual, Telematics / Audio / Video / Audio And Visual System / Display Signal Circuit between Radio Receiver and Extension Module

DESCRIPTION

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

WIRING DIAGRAM

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - SATELLITE RADIO TUNER ASSEMBLY)

(a) Disconnect the K5 and L2 radio and display receiver assembly connectors.

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

K5-1 (USV4) - K2-1 (USV4)

Always

Below 1 Ω

K5-2 (US4-) - K2-2 (US4-)

Always

Below 1 Ω

K5-3 (US4+) - K2-3 (US4+)

Always

Below 1 Ω

K5-4 (UGD4) - K2-4 (UGD4)

Always

Below 1 Ω

K5-5 (USG4) - K2-5 (USG4)

Always

Below 1 Ω

L2-4 (+B2) - L3-4 (+B2)

Always

Below 1 Ω

L2-3 (ACC2) - L3-3 (ACC2)

Always

Below 1 Ω

L2-8 (GND2) - L3-8 (GND2)

Always

Below 1 Ω

K5-1 (USV4) - Body ground

Always

10 kΩ or higher

K5-2 (US4-) - Body ground

Always

10 kΩ or higher

K5-3 (US4+) - Body ground

Always

10 kΩ or higher

K5-4 (UGD4) - Body ground

Always

10 kΩ or higher

K5-5 (USG4) - Body ground

Always

10 kΩ or higher

L2-4 (+B2) - Body ground

Always

10 kΩ or higher

L2-3 (ACC2) - Body ground

Always

10 kΩ or higher

L2-8 (GND2) - Body ground

Always

10 kΩ or higher

Result

Result

Proceed to

OK

A

NG (for Column Shift Type)

B

NG (for Floor Shift Type)

C

B

REPAIR OR REPLACE NO. 1 NAVIGATION WIRE

C

REPAIR OR REPLACE NO. 1 NAVIGATION WIRE

A

2.

CHECK NO. 1 NAVIGATION WIRE (LVDS COMMUNICATION LINE)

(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 [LVDS COMMUNICATION LINE] IS DEFECTIVE)

NG

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

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