Navigation System

NAVIGATION: NAVIGATION SYSTEM: 01-DF: Master Error

DTC 01-DF - Master Error

DESCRIPTION





HINT:
*: When 210 seconds have elapsed after disconnecting the power supply connector of the master component with the engine switch on (ACC or IG), this code is stored.
NOTICE:
- 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.

INSPECTION PROCEDURE
NOTICE:
Be sure to read DESCRIPTION before performing the following procedures.

PROCEDURE

1. CHECK MULTI-DISPLAY POWER SOURCE CIRCUIT
(a) Refer to the multi-display power source circuit Multi-Display Power Source Circuit.
If the power source circuit is operating normally, proceed to the next step.
NEXT -- Continue to next step.
2. INSPECT RADIO RECEIVER





(a) Disconnect the K53, K54 and K56 receiver connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPLACE RADIO RECEIVER ASSEMBLY
OK -- Continue to next step.
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





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

NEXT -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - COMPONENT WHICH HAS STORED THIS CODE)
HINT:
For details of the connectors, refer to "TERMINALS OF ECU" Pinout Values and Diagnostic Parameters.
(a) Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the multi-display and the component which has stored this code.
(1) Disconnect all connectors between the multi-display and the component which has stored this code.
(2) Check for an open or short in the AVC-LAN circuit between the multi-display and the component which has stored this code.
OK:
There is no open or short circuit.





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
5. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - RADIO RECEIVER)
HINT:
For details of the connectors, refer to "TERMINALS OF ECU" Pinout Values and Diagnostic Parameters.
(a) Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the multi-display and the radio receiver.
(1) Disconnect all connectors between the multi-display and the radio receiver.
(2) Check for an open or short in the AVC-LAN circuit between the multi-display and the radio receiver.
OK:
There is no open or short circuit.





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
6. REPLACE MULTI-DISPLAY
(a) Replace the multi-display with a normal one and check if the same problem occurs again.
OK:
Same problem does not occur.
NG -- REPLACE COMPONENT WHICH HAS STORED THIS CODE
OK -- END