DTC 01-DC Transmission Error: Description

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

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