DTC 01-DF

AUDIO / VISUAL: AUDIO AND VISUAL SYSTEM: 01-DF: Master Error
01-DF - Master Error

DESCRIPTION





HINT
When 210 seconds have elapsed after disconnecting the power supply connector of the master unit with the ignition switch ON or ACC, this DTC is stored.

NOTICE:
* Before starting troubleshooting, be sure to clear the DTCs stored due to the reason 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 for the DTCs after the inspection is completed to confirm that no DTCs are output.

INSPECTION PROCEDURE

NOTICE:
Be sure to read Description before performing the following procedure.

PROCEDURE

1. CHECK RADIO RECEIVER POWER SOURCE CIRCUIT

HINT
Refer to Radio Receiver Power Source Circuit Radio Receiver Power Source Circuit.

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

NEXT -- Continue to next step.

2. INSPECT RADIO RECEIVER

(a) Disconnect the radio receiver connector(s).





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

Standard Resistance:





Text in Illustration





*3: for 8 Speakers

*4: w/ USB Audio System

NG -- REPLACE RADIO RECEIVER Removal
OK -- Continue to next step.

3. IDENTIFY COMPONENT WHICH HAS STORED THIS CODE

(a) Enter diagnostic mode.





(b) Press preset switch "2" to change the mode to "Detailed Information Mode".

(c) Identify the component which has stored this code.

Component Table





HINT
* "P440" set by the stereo component amplifier is shown in the preceding illustration as an example.
* For details of the DTC display, refer to DTC Check/Clear Reading and Clearing Diagnostic Trouble Codes.

NEXT -- Continue to next step.

4. CHECK COMPONENT SHOWN BY SUB-CODE

(a) Select the component shown by the sub-code.

HINT
The stereo component tuner assembly is built into the radio receiver. If there is a problem between the stereo component tuner assembly and radio receiver, replace the radio receiver.

Component Table





B -- REPLACE RADIO RECEIVER Removal
A -- Continue to next step.

5. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - COMPONENT WHICH HAS STORED THIS CODE)

HINT
For details of the connectors, refer to Terminals of ECU Pinout Values and Diagnostic Parameters.

(a) Referring to the following AVC-LAN wiring diagram, check the AVC-LAN circuit between the radio receiver and component which has stored this code.

(1) Disconnect all connectors between the radio receiver and component which has stored this code.

(2) Check for an open or short in the AVC-LAN circuit between the radio receiver and component which has stored this code.

OK:

There is no open or short circuit.





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

6. REPLACE RADIO RECEIVER

(a) Replace the radio receiver with a known good one.

NEXT -- Continue to next step.

7. CLEAR DTC

(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.

NEXT -- Continue to next step.

8. RECHECK FOR DTC

(a) Recheck for DTCs and check if the same problem occurs again.

OK:

Malfunction disappears.

NG -- REPLACE COMPONENT WHICH HAS STORED THIS CODE

OK -- END