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

Display does not Dim when Light Control Switch is Turned ON

Does not Play even after Bluetooth Audio Mode is Selected

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Toyota Tundra Service Manual > Can Communication System: Open in Bus 3 Main Bus Line
DESCRIPTION There may be an open circuit in one of the CAN main bus lines when the resistance between terminals 6 (CA3H) and 21 (CA3L) or 19 (CAYH) and 20 (CAYL) of the central gateway ECU (network gateway ECU) is 70 Ω or higher. Symptom Trouble Area Resistance between terminals 6 (CA3H) and 21 (CA ...

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

Display does not Dim when Light Control Switch is Turned ON

Does not Play even after Bluetooth Audio Mode is Selected

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