DTC 01-DC Transmission Error: Description

WARNING: This page is about a different car, the 2006 Lexus IS 350 and 2006 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.

DTC DETECTION CONDITION

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

NOTE:

The radio receiver is the master unit.
Be sure to clear and recheck DTCs after the inspection is completed to confirm that no DTCs are output.

NOTE: Be sure to read DESCRIPTION before performing the following procedures.

CHECK FOR DTC OF OTHER COMPONENTS

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.

Result

RESULT REFERENCE

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

HINT:

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

B: Go to step 4

A: Go to next step.

IDENTIFY THE COMPONENT WHICH HAS STORED THIS CODE

Enter the diagnostic mode.

Fig 1: Service Check Mode Communication Diagram - Detailed Information Mode
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Press the preset switch "3" to change to "Detailed Information Mode ".
Identify the component which has stored this code.

Component Table:

COMPONENT TABLE

Component	Physical address
Gateway ECU	1C6
Stereo component amplifier	440
Integration control & panel assembly	1D8
Radio receiver	190

HINT:

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

CHECK COMPONENT WHICH HAS STORED THIS CODE

Select the component which has stored this code.

Component Table:

COMPONENT TABLE

Component	Proceed to
Gateway ECU	Gateway ECU Communication Error
Stereo component amplifier	Stereo Component Amplifier Communication Error
Integration control & panel assembly	Integration Control and Panel Assembly Communication Error
Radio receiver	Radio receiver communication error (See IDENTIFICATION OF NOISE SOURCE )

END

CLEAR DTC
1. Clear the DTCs (See DTC CHECK/CLEAR ).
  HINT:
  
  If "01-DC" is output for only one component, this may not indicate a malfunction.
RECHECK DTC
1. Recheck for DTCs and check if the same trouble code occurs again.
  OK: Malfunction disappears.
NG: Go to step 3

OK: END