Last Modified: 11-29-2007 1.6 C
Service Category: Audio/Visual/Telematics Section: Navigation/Multi Info Display
Model Year: 2008 Model: Sequoia Doc ID: RM00000182M031X
Title: NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: DESCRIPTION (2008 Sequoia)

DTC

01-DF

Master Error

DESCRIPTION

DTC Code

DTC Detection Condition

Trouble Area

01-DF*

When either condition below is met:

  • Device with a display fails and master is switched to the audio device.
  • Communication error between sub-master (stereo component amplifier) and master occurs.
  • Navigation receiver assembly power source circuit
  • AVC-LAN circuit between navigation receiver and component which has stored this code
  • AVC-LAN circuit between navigation receiver and stereo component amplifier
  • Navigation receiver assembly
  • Component which has stored this code

HINT:

*: When 210 seconds have elapsed after disconnecting the power supply connector of the master component with the ignition switch ON or ACC, this code is stored.

NOTICE:

  • Before starting troubleshooting, be sure to clear DTCs to clear codes stored due to the reasons described in Hint above. Then, check for DTCs and troubleshoot according to the output DTCs.
  • The navigation receiver assembly is the master unit.
  • 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.

PROCEDURE

1.

CHECK NAVIGATION RECEIVER ASSEMBLY POWER SOURCE CIRCUIT

(a) Refer to the navigation receiver assembly power source circuit NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: DESCRIPTION (2008 Sequoia) .

If the power source circuit is operating normally, proceed to the next step.

NEXT

2.

INSPECT NAVIGATION RECEIVER ASSEMBLY

(a) Disconnect the I20 and I8* navigation receiver assembly connectors.

HINT:

*: w/ Rear Seat Entertainment System

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

I20-5 (ATX+) - I20-15 (ATX-)

Always

60 to 80 Ω

I8-9 (TXM+) - I8-10 (TXM-)*

HINT:

*: w/ Rear Seat Entertainment System

(c) Reconnect the navigation receiver assembly connectors.

OK

3.

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

Display

Component

DSP-AMP

Stereo component amplifier assembly

Rr-TV*

Television display assembly

HINT:

  • "DSP-AMP" is the component which has stored this code in the example shown in the illustration.
  • *: w/ Rear Seat Entertainment System

NEXT

4.

CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER - COMPONENT WHICH HAS STORED THIS CODE)

HINT:

For details of the connectors, refer to "Terminals of ECU" NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: TERMINALS OF ECU (2008 Sequoia) .

(a) Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the navigation receiver assembly and the component which has stored this code.

(1) Disconnect all connectors between the navigation receiver assembly and the component which has stored this code.

(2) Check for an open or short in the AVC-LAN circuit between the navigation receiver assembly and the component which has stored this code.

OK:

There is no open or short circuit.





OK

5.

REPLACE NAVIGATION RECEIVER ASSEMBLY

(a) Replace the navigation receiver assembly with a normal one NAVIGATION / MULTI INFO DISPLAY: NAVIGATION RECEIVER: REMOVAL (2008 Sequoia) .

(b) Check if the same problem occurs again.

OK:

Same problem does not occur.

OK