DTC    01-DF    Master Error

for Preparation Click here


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 (radio receiver) and master occurs, this code is stored
  1. Multi-display power source circuit
  1. AVC-LAN circuit between the multi-display and the component which has stored this code
  1. AVC-LAN circuit between the multi-display and the radio receiver
  1. Multi-display
  1. 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 condition shown in "HINT" above.
  2. The multi-display 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 MULTI-DISPLAY POWER SOURCE CIRCUIT
Refer to the multi-display power source circuit (Click here).
If the power source circuit is operating normally, proceed to the next step.

NEXT


2.INSPECT RADIO RECEIVER


    E110926E01

  1. Disconnect the radio receiver connectors.

  1. 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


    E111829E01

  1. Enter the diagnostic mode.

  1. Press the "LAN Mon" switch to change to "LAN Monitor" mode.

  1. Identify the component which has stored this code.

    Component Table 
    Display
    		Component
    AUDIO H/U
    		Radio Receiver
    DSP-AMP
    		Stereo Component Amplifier
    G/W
    		Gateway ECU
    NAVI
    		Navigation ECU
    CAMERA
    		Television Camera ECU

    HINT:
    "NAVI" is the component which has stored this code in the example shown in the illustration.


NEXT


4.CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - 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 multi-display and the component which has stored this code.



    1. Check for an open or short in the AVC-LAN circuit between the multi-display and the component which has stored this code.

      OK:
      There is no open or short circuit.


      E111828E02



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - RADIO RECEIVER)

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 multi-display and the radio receiver.



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

      OK:
      There is no open or short circuit.


      E111831E02



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


6.REPLACE MULTI-DISPLAY

  1. Replace the multi-display 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