DTC 01-DF

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

DESCRIPTION





HINT
*1: 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.

NOTICE:
* Before starting troubleshooting, be sure to clear the DTCs 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 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 procedures.

PROCEDURE

1. CHECK RADIO RECEIVER POWER SOURCE CIRCUIT

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.





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

Standard Resistance:





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

3. IDENTIFY THE COMPONENT WHICH HAS STORED THIS CODE

(a) Enter the diagnostic mode.





(b) Press the preset switch "3" to change the mode to "Detailed Information Mode".

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

Component Table

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 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 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.





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

5. REPLACE RADIO RECEIVER

(a) Replace the radio receiver with a known good one and check if the same problem occurs again.

OK:

Same problem does not occur.

NG -- REPLACE COMPONENT WHICH HAS STORED THIS CODE

OK -- END