Toyota Tundra. Manual — part 486

INSPECTION PROCEDURE

1. CHECK NAVIGATION RECEIVER POWER SOURCE CIRCUIT

a. Refer to the NAVIGATION RECEIVER POWER SOURCE CIRCUIT .

If the power source circuit is operating normally, proceed to the next step.

2. IDENTIFY COMPONENT WHICH HAS STORED THIS CODE

a. Enter the diagnostic mode.

b. Press the "LAN Mon" switch to change to "LAN Monitor" mode.

c. Identify the component which has stored this code.

Component table

COMPONENT CHART

HINT:

"DSP-AMP" is the component which has stored this code in the example shown in the illustration.



*1: Even if no fault is present, this trouble code may be stored depending on the battery condition
or engine start voltage.



*2: When 210 seconds have elapsed after disconnecting the power supply connector of the master
component with the ignition switch ON or ACC, this code is stored.

NOTE:



Before starting troubleshooting, be sure to clear DTCs to erase codes
stored due to the reasons described in the HINT above. Then, check for
DTCs and troubleshoot according to the output DTCs.



The navigation receiver is the master unit.



Be sure to clear and recheck DTCs after the inspection is completed to
confirm that no DTCs are output.

NOTE:

Be sure to read the DESCRIPTION before performing the following procedures.

Display

Component

AVN

Navigation receiver

DSP-AMP Stereo component amplifier

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Navigation - Tundra

Fig. 85: Diagnostic Menu Screen Display - LAN Monitor Mode
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

3. CHECK POWER SOURCE CIRCUIT OF COMPONENT WHICH HAS STORED THIS CODE

a. Inspect the power source circuit of the component which has stored this code.

Component table

POWER SOURCE CIRCUIT COMPONENT CHART

If the power source circuit is operating normally, proceed to the next step.

Component

Proceed to

Navigation receiver (AVN)

NAVIGATION RECEIVER ASSEMBLY POWER
SOURCE CIRCUIT

Stereo component amplifier
(DSP-AMP)

STEREO COMPONENT AMPLIFIER POWER SOURCE
CIRCUIT

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Navigation - Tundra

4. INSPECT NAVIGATION RECEIVER

a. Disconnect the K18 receiver connector.

Fig. 86: Identifying K18 Receiver Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

Standard resistance

NAVIGATION RECEIVER TESTER CONNECTION SPECIFIED CONDITION

Result

NAVIGATION RECEIVER RESULT CHART

B: REPLACE NAVIGATION RECEIVER (see REMOVAL )

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

A: Go to next step

5. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER - COMPONENT WHICH

HAS STORED THIS CODE)

HINT:

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

Tester Connection Condition Specified Condition

5 (ATX+) - 15 (ATX-) Always

60 to 80 ohms

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

a. Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the

navigation receiver and the component which has stored this code.

1. Disconnect all connectors between the navigation receiver and the component which has

stored this code.

2. Check for an open or short in the AVC-LAN circuit between the navigation receiver and the

component which has stored this code.

OK: There is no open or short circuit.

Fig. 87: AVC-LAN Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

6. REPLACE COMPONENT WHICH HAS STORED THIS CODE

a. Replace the component which has stored this code with a normal one and check if the same

problem occurs again.

OK: Same problem does not occur.

Result

RESULT CHART

B: REPLACE NAVIGATION RECEIVER (see REMOVAL )

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

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