Lexus IS250 · Service Manual BODY ELECTRICAL

01-DC

Diagnostic trouble codes

DESCRIPTION

DTC No.
 DTC Detection Condition
 Trouble Area
01-DC
 Transmission to component shown by sub-code failed.
(Detecting this DTC does not always mean actual failure.)
 If the same sub-code is recorded in other components, check harness for power supply and communication system of all components shown by code

NOTICE:
  1. The multi-display is the master unit.
  2. 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 FOR DTC OF OTHER COMPONENTS

  1. Check if the component shown by the sub-code is displayed in the check result of the other components.

    1. Check if "01-DC" is output for the other components.

    2. If "01-DC" is output for any other components, check if the same physical address is displayed.

      HINT:
      For the list of the components shown by sub-codes, refer to the table in step 2.

      Result:
      Result
      		 Proceed to
      "01-DC" is output and the same physical address is displayed
      		 A
      "01-DC" is not output or the same physical address is not displayed
      		 B



B
Go to step 4
A


2. IDENTIFY THE COMPONENT WHICH HAS STORED THIS CODE

  1. E121199E02
    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 (190)
    		 Radio receiver
    DSP-AMP (440)
    		 Stereo component amplifier
    G/W (1C6)
    		 Gateway ECU
    NAVI (178)
    		 Navigation ECU
    EMV (110)
    		 Multi-display
    CAMERA-C (1AC)
    		 Television camera ECU

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


NEXT


3. CHECK COMPONENT WHICH HAS STORED THIS CODE

  1. Select the component which has stored this code.

    Component Table: 
    Component
    		 Proceed to
    Gateway ECU (G/W)
    		 Gateway ECU communication error (Click here)
    Radio receiver (AUDIO H/U)
    		 Radio receiver communication error (Click here)
    Stereo component amplifier (DSP-AMP)
    		 Stereo component amplifier communication error (Click here)
    Navigation ECU (NAVI)
    		 Navigation ECU communication error (Click here)
    Multi-display (EMV)
    		 Multi-display communication error (Click here)
    Television camera ECU
    (CAMERA-C)
    		 Television camera ECU communication error (Click here)


NEXT

END

4. CLEAR DTC

  1. Clear the DTCs (Click here).

    HINT:
    If "01-DC" is output for only one component, this may not indicate a malfunction.


NEXT


5. RECHECK DTC

  1. Recheck for DTCs and check if the same trouble occurs again.

OK:
Malfunction disappears.



 NG
Go to step 3
OK

END


← 01-D601-DD →