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.

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

REPAIR OR REPLACE NO. 1 NAVIGATION WIRE

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

END (NO. 1 NAVIGATION WIRE [LVDS COMMUNICATION LINE] IS DEFECTIVE)

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

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

Display does not Dim when Light Control Switch is Turned ON

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