Toyota Tundra. Manual — part 147



For details of the DTC display, refer to "DTC CHECK / CLEAR" .

4. CHECK COMPONENT WHICH HAS STORED THIS CODE

a. Select the component which has stored this code.

HINT:

The "Bluetooth" handsfree module is built into the radio receiver. If there is a problem between the
"Bluetooth" handsfree module and radio receiver, replace the radio receiver.

Component table:

COMPONENT TABLE

A: REPLACE RADIO RECEIVER (see REMOVAL )

B: REPLACE RADIO RECEIVER (see REMOVAL )

C: Go to Next Step

5. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - COMPONENT WHICH HAS

STORED THIS CODE)

HINT:

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

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

receiver and the component which has stored this code.

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

this code.

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

component which has stored this code.

OK: There is no open or short circuit.

Component

Proceed to

"Bluetooth" handsfree module (for Column Shift Type)

A

"Bluetooth" handsfree module (for Floor Shift Type)

B

Except "Bluetooth" handsfree module

C

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Audio/Visual - Tundra

Fig. 33: 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 RADIO RECEIVER

a. Replace the radio receiver for column shift type (see REMOVAL ) or floor shift type (see

REMOVAL ).

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

DTC

No.

DTC Detection Condition

Trouble Area

01-

DF*

The device with a display fails and the master is
switched to the audio device.
Also when a communication error between the
sub-master (audio) and master occurs, this code
is stored.



Radio receiver power source circuit



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



Radio receiver



Component which has stored this code

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

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Audio/Visual - Tundra

INSPECTION PROCEDURE

1. CHECK RADIO RECEIVER POWER SOURCE CIRCUIT

a. Refer to the RADIO RECEIVER POWER SOURCE CIRCUIT .

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

2. INSPECT RADIO RECEIVER

a. Disconnect the K4 receiver connector.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Result:

RESULT REFERENCE

B: REPLACE RADIO RECEIVER (see REMOVAL )

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 radio 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

K4-5(ATX+) - K4-15 (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 Audio/Visual - Tundra

Fig. 34: Identifying K4 Receiver Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

C: REPLACE RADIO RECEIVER (see REMOVAL )

A: Go to Next Step

3. IDENTIFY COMPONENT WHICH HAS STORED THIS CODE

a. Enter the diagnostic mode.

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Audio/Visual - Tundra