DTC 01-DC Transmission Error: Description

WARNING: This page is about a different car, the 2006 Lexus RX 400h. However, it is still accessible from the selected car via links, so may be relevant.

DTC DETECTION CONDITION CHART

DTC No.	DTC Detection Condition	Trouble Area
01-DC *1	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
HINT: *1: This code may be stored if the engine is started, idled for 60 seconds and then the ignition switch is turned to the START position again.

NOTE:

Before starting troubleshooting, be sure to clear DTCs to erase codes stored due to the reasons described in the HINT above. Then, check for DTCs and troubleshoot according to the output DTCs.
The multi-display 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.

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

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 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

B: Go to step 4

A: GO TO NEXT STEP.

IDENTIFY THE COMPONENT WHICH HAS STORED THIS CODE

Enter the diagnostic mode.
Press the "LAN Mon" switch to change to "LAN Monitor" mode.

Identify the component which has stored this code.

Fig 1: System Check Mode - Display LAN Monitor

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Component Table

COMPONENT REFERENCE

Display	Component
AUDIO H/U (190)	Radio receiver
DSP-AMP (440)	Stereo component amplifier
G/W(1C6)	Gateway ECU
NAVI (178)	Navigation ECU
CAMERA (280)	Television camera ECU
RSE(1F6)	Multi-display controller
EMV(110)	Multi-display

HINT:

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

CHECK COMPONENT WHICH HAS STORED THIS CODE

Select the component which has stored this code.

Component Table

COMPONENT REFERENCE

Component	Proceed to
Network gateway ECU (G/W)	GATEWAY ECU COMMUNICATION ERROR
Radio receiver (AUDIO H/U)	RADIO RECEIVER COMMUNICATION ERROR
Stereo component amplifier (DSP-AMP)	STEREO COMPONENT AMPLIFIER COMMUNICATION ERROR
Navigation ECU (NAVI)	NAVIGATION ECU COMMUNICATION ERROR
Multi-display controller (RSE)	MULTI-DISPLAY CONTROLLER COMMUNICATION ERROR
Television camera ECU (CAMERA)	TELEVISION CAMERA ECU COMMUNICATION ERROR
Multi-display (EMV)	MULTI-DISPLAY COMMUNICATION ERROR

NEXT: 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 occurs again.
  OK: Malfunction disappears.
NG: Go to step 3

OK: END