DTC    01-DF    Master Error

for Preparation Click here


DESCRIPTION


DTC No.
DTC Detection Condition
Trouble Area
01-DF
*1
The device with a display fails and the master unit is switched to the audio device.
Also when a communication error between the sub-master unit (audio) and master unit occurs, this DTC is stored.
  1. Radio receiver assembly power source circuit
  2. AVC-LAN circuit between the radio receiver assembly and component which has stored this code
  3. Radio receiver assembly
  4. 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 power switch on (IG) or (ACC), this DTC is stored.

NOTICE:
  1. 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.
  2. The radio receiver assembly is the master unit.
  3. Be sure to clear and recheck for 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.

1.CHECK RADIO RECEIVER ASSEMBLY POWER SOURCE CIRCUIT

HINT:
Refer to 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 ASSEMBLY

  1. Disconnect the radio receiver assembly connectors.



    E222733E01

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    H51-5 (ATX+) - H51-15 (ATX-)
    		Always
    		60 to 80 Ω
    H53-9 (TXM+) - H53-10 (TXM-)
    		Always
    		60 to 80 Ω

    Text in Illustration 
    *a
    		Component without harness connected
    (Radio Receiver Assembly)



NG
REPLACE RADIO RECEIVER ASSEMBLY (Click here)
OK


3.IDENTIFY COMPONENT WHICH HAS STORED THIS CODE


  1. Enter diagnostic mode.


    E110915E13

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

  1. Identify the component which has stored this code.

    Component Table 
    Component
    		Physical Address
    Stereo component amplifier assembly
    		440
    Radio receiver assembly
    		190
    Multi-media interface ECU assembly
    		388

    HINT:
    1. The physical address "P440" shown in the above example indicates the stereo component amplifier assembly.
    2. For details of the DTC display, refer to DTC Check/Clear (Click here).


NEXT


4.CHECK HARNESS AND CONNECTOR

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



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

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



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

      OK:
      There is no open or short circuit.


      E195563E12



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.REPLACE RADIO RECEIVER ASSEMBLY

  1. Replace the radio receiver assembly with a known good one.


NEXT


6.CLEAR DTC

  1. Clear the DTCs (Click here).


NEXT


7.RECHECK FOR DTC

  1. Recheck for DTCs and check if the same DTC is output again.

    OK:
    No DTCs are output.



NG
REPLACE COMPONENT WHICH HAS STORED THIS CODE
OK

END