Toyota Tundra. Manual — part 488

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. INSPECT NAVIGATION RECEIVER

a. Disconnect the K18 receiver connector.

Fig. 89: 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



*1: This code may be stored if the engine is started, idled for 60 seconds and then the ignition
switch is turned to the START position again.



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

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.

Tester Connection Condition Specified Condition

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

60 to 80 ohms

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Navigation - Tundra

Result

NAVIGATION RCEIVER RESULT CHART

B: REPLACE NAVIGATION RECEIVER (see REMOVAL )

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

A: Go to next step

3. 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.

Result

Proceed to

OK

A

NG (for Column Shift Type)

B

NG (for Floor Shift Type)

C

Display

Component

AVN

Navigation receiver

DSP-AMP Stereo component amplifier

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2009 ACCESSORIES AND EQUIPMENT Navigation - Tundra

Fig. 90: Diagnostic Menu Screen Display - LAN Mon Switch
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

HAS STORED THIS CODE)

HINT:

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

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.

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2009 ACCESSORIES AND EQUIPMENT Navigation - Tundra

OK: There is no open or short circuit.

Fig. 91: 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

5. REPLACE NAVIGATION RECEIVER

a. Replace the navigation receiver (for Column Shift Type) with a normal one (see REMOVAL ).

b. Replace the navigation receiver (for Floor Shift Type) with a normal one (see REMOVAL ).

c. Check if the same problem occurs again.

OK: Same problem does not occur.

NG: REPLACE COMPONENT WHICH HAS STORED THIS CODE

OK: END

DTC 01-DF MASTER ERROR

DESCRIPTION

DTC TROUBLE DETECTION CONDITION CHART

DTC

No.

DTC Detection Condition

Trouble Area

01-

DF*

When either condition below is met:



Device with a display fails and master is
switched to the audio device.



Communication error between sub-master
(stereo component amplifier) and master



Navigation receiver power source circuit



AVC-LAN circuit between navigation
receiver and component which has
stored this code



AVC-LAN circuit between navigation
receiver and stereo component amplifier

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Navigation - Tundra