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
   Navigation receiver assembly (140)	Navigation receiver assembly power source circuit (See NAVIGATION RECEIVER ASSEMBLY POWER SOURCE CIRCUIT  )
   Television display assembly (1B0)	Television display assembly power source circuit (See TELEVISION DISPLAY POWER SOURCE CIRCUIT  )

1. Disconnect the navigation receiver assembly connectors.
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 stereo component amplifier and the component shown by the sub-code.
   1. Disconnect all connectors between the stereo component amplifier and the component shown by sub-code.
   2. Check for an open or short in the AVC-LAN circuit between the stereo component amplifier 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 STEREO COMPONENT AMPLIFIER 

OK: END