Toyota Tundra. Manual — part 487

A: END

DTC 01-DC TRANSMISSION ERROR

DESCRIPTION

DTC TROUBLE DETECTION CONDITION CHART

HINT:

This code may be stored if engine started, idled 60 seconds and then the ignition switch is turned to the START
position again.

INSPECTION PROCEDURE

1. CHECK FOR DTC OF OTHER COMPONENTS

a. 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.

b. 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 the next step.

Result

01-DC RESULT CHART

DTC

No.

DTC Detection Condition

Trouble Area

01-DC

Transmission to component
shown by subcode is failed.
(Detecting this DTC does not
always mean actual failure.)

If same sub-code is recorded in other components, check harness
for power supply and communication system of all components
shown by code

NOTE:



The navigation 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 the DESCRIPTION before performing the following procedures.

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

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B: Go to step 4

A: Go to next step

2. IDENTIFY COMPONENT WHICH HAS STORED THIS CODE

a. Enter the diagnostic mode.

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

c. Identify the component which has stored this code.

Component table

COMPONENT CHART

HINT:

"DSP-AMP" is the component which has stored this code in the example shown in the illustration.

Display

Component

AVN

Navigation receiver

DSP-AMP Stereo component amplifier

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Fig. 88: Diagnostic Menu Screen Display - LAN Monitor Mode
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

3. CHECK COMPONENT WHICH HAS STORED THIS CODE

a. Select the component which has stored this code.

Component table

COMPONENT CHART

Component

Proceed to

Navigation receiver (AVN)

NAVIGATION RECEIVER ASSEMBLY
COMMUNICATION ERROR

Stereo component amplifier (DSP-AMP)

STEREO COMPONENT AMPLIFIER
COMMUNICATION ERROR

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NEXT: END

4. CLEAR DTC

a. Clear the DTCs (see DTC CHECK / CLEAR ).

HINT:

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

5. RECHECK DTC

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

OK: Malfunction disappears.

NG: Go to step 6

OK: END

6. CHECK COMPONENT WHICH HAS STORED THIS CODE

a. Select the component which has stored this code.

COMPONENT CHART

NEXT: END

DTC 01-DD MASTER RESET; DTC 01-E1 VOICE PROCESSING DEVICE ON ERROR

DESCRIPTION

DTC TROUBLE DETECTION CONDITION CHART

Component

Proceed to

Navigation receiver (AVN)

NAVIGATION RECEIVER ASSEMBLY
COMMUNICATION ERROR

Stereo component amplifier (DSP-AMP)

STEREO COMPONENT AMPLIFIER
COMMUNICATION ERROR

DTC

No.

DTC Detection Condition

Trouble Area

01-

DD*1

Device that should be master has been
disconnected after engine starts.



Navigation receiver power source circuit



AVC-LAN circuit between Navigation
receiver and component which has stored
this code



Navigation receiver



Component which has stored this code

01-

E1*1,

*2

Amplifier device records that amplifier output
does not function even while source device is
operating.

HINT:

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2009 ACCESSORIES AND EQUIPMENT Navigation - Tundra