Toyota Tundra. Manual — part 577

Each unit of the navigation system connected to the AVC-LAN (communication bus) transfers the signal of
each switch by communication.

When a short to +B or short to ground occurs in this AVC-LAN, the navigation system will not function
normally as the communication is discontinued.

INSPECTION PROCEDURE

1. CHECK NAVIGATION RECEIVER

a. Disconnect the K18 and K8 receiver connectors.

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

Standard resistance

NAVIGATION RECEIVER TESTER CONNECTION SPECIFIED CONDITION

Fig. 424: Identifying K18 And K8 Receiver Connectors
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Result

Tester Connection

Condition Specified Condition

K18-5 (ATX+) - K18-15 (ATX-)

Always

60 to 80 ohms

K8-9 (TXM+) - K8-10 (TXM-)*

HINT:
*: w/ Rear Seat Entertainment System

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Navigation - Tundra

NAVIGATION RECEIVER RESULT CHART

B: REPLACE NAVIGATION RECEIVER (see REMOVAL (For Column Shift Type) )

C: REPLACE NAVIGATION RECEIVER (see REMOVAL (For Floor Shift Type) )

A: Go to Next Step

2. CHECK HARNESS AND CONNECTOR

HINT:

For details of the connectors, refer to "TERMINALS OF ECU" .

a. Referring to the AVC-LAN wiring diagram below, check all AVC-LAN circuits.

1. Disconnect all connectors in all AVC-LAN circuits.

2. Check for an open or short in the AVC-LAN circuit.

OK: There is no open or short circuit.

Fig. 425: AVC-LAN Wiring Diagram (W/O Rear Set Entertainment System)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Result

Proceed to

OK

A

NG (for Column Shift Type)

B

NG (for Floor Shift Type)

C

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Navigation - Tundra

Fig. 426: AVC-LAN Wiring Diagram (W/ Rear Set Entertainment System)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS
TABLE

REVERSE SIGNAL CIRCUIT

DESCRIPTION

The navigation receiver receives a reverse signal from the park / neutral position and information about the
navigation antenna, and then adjusts vehicle position.

WIRING DIAGRAM

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Navigation - Tundra

Fig. 427: Reverse Signal Circuit - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

1. CHECK NAVIGATION RECEIVER

a. Measure the voltage according to the value(s) in the table below.

Standard voltage

NAVIGATION RECEIVER TESTER CONNECTION SPECIFIED CONDITION

Fig. 428: Identifying Navigation Receiver Connector K6
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Result

NAVIGATION RECEIVER RESULT CHART

Tester Connection

Switch Condition

Specified Condition

K6-5 (REV) - Body ground

Ignition switch ACC, shift lever in R position

11 to 14 V

Ignition switch ACC, shift lever in P position

Below 1 V

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Navigation - Tundra