01-DF

DESCRIPTION

DTC No.	DTC Detection Condition	Trouble Areas
01-DF *1	The device with a display fails and the master is switched to the audio device Also when a communication error between 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:

*1: 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.

NOTICE:

1. Be sure to clear and recheck DTCs and perform inspection according to the result to avoid the conditions shown in the "HINT" above.
   
2. The radio receiver is the master unit.
   
3. Be sure to clear and recheck 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.

1. CHECK RADIO RECEIVER POWER SOURCE CIRCUIT

Refer to the radio receiver power source circuit (Click here).
If the power source circuit is operating normally, proceed to the next step.

NEXT

2. INSPECT RADIO RECEIVER

1. Disconnect the radio receiver connectors.

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

   Resistance:

   Tester Connection	Condition	Specified Condition
   ATX+ (R2-5) - ATX- (R2-15)	Always	60 to 80 Ω
   TX+ (R3-9) - TX- (R3-10)	Always	60 to 80 Ω

NG	REPLACE RADIO RECEIVER

OK

3. IDENTIFY THE COMPONENT WHICH HAS STORED THIS CODE

1. Enter the diagnostic mode.
   

2. Press the preset switch "3" to change to "Detailed Information Mode".

3. Identify the component which has stored this code.

   Component Table 

   Component	Physical address
   Gateway ECU	1C6
   Stereo Component Amplifier	440

HINT:

1. The "440 (stereo component amplifier)" is the component which has stored this code in the example shown in the illustration.
   
2. For details of the DTC display, refer to the "DTC CHECK/CLEAR" (Click here).
   

NEXT

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

HINT:

For details of the connectors, refer to the "Terminals of ECU" (Click here).

1. 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. Check for 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

5. REPLACE RADIO RECEIVER

1. Replace the radio receiver with a normal 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