Inspection Procedure

1. Enter the diagnostic mode.
2. Press the "LAN Mon" switch to change to "LAN Monitor" mode.
3. Identify the component shown by the sub-code.

   HINT:

   • "110 (multi-display)" is the component shown by the sub-code in the example shown in the illustration.
   • The sub-code will be indicated by its physical address.
   • For the component list, refer to "DIAGNOSIS DISPLAY DETAILED DESCRIPTION ".
     Fig 1: Diagnostic Tool Display - LAN Mon

     Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Inspect the power source circuit of the component shown by the sub-code.

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

   Component Table: 

   COMPONENT CHART
   
   

   Component	Proceed to
   Television display assembly (1B0)	Television display assembly power source circuit (See TELEVISION DISPLAY POWER SOURCE CIRCUIT  )
   Stereo component amplifier (440)	Stereo component amplifier power source circuit (See STEREO COMPONENT AMPLIFIER POWER SOURCE CIRCUIT  )

1. Disconnect the navigation receiver assembly.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester Connection	Condition	Specified Condition
   ATX+ (R15-5) - ATX- (R15-15)	Always	60 to 80 Ω
   TX+ (R14-9) - TX- (R14-10)	Always	60 to 80 Ω

Fig 2: Identifying Navigation Receiver Assembly
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE NAVIGATION RECEIVER ASSEMBLY 

OK: Go to next step. 

HINT:

• Start the check from the circuit that is near the component shown by the sub-code first.
• For details of the connectors, refer to "TERMINALS OF ECU ".

1. Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the navigation receiver assembly and the component shown by the sub-code.
   1. Disconnect all connectors between the navigation receiver assembly and the component shown by sub-code.
   2. Check for an open or short in the AVC-LAN circuit between the navigation receiver assembly and the component shown by the sub-code.
      Fig 3: AVC-LAN Circuit - Warning Diagram

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: There is no open or short circuit. 

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step. 

1. Replace the component shown by the sub-code with a normal one and check if the same problem occurs again.

   OK: Same problem does not occur. 

NG: REPLACE NAVIGATION RECEIVER ASSEMBLY 

OK: END