Inspection Procedure

1. Enter the diagnostic mode.
2. Press the "LAN Mon" switch to change to "LAN Monitor" mode.
Fig 1: Identifying "LAN Monitor"Display Screen
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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 " ( see ).

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.

   DISPLAY REFERENCE CHART
   
   

   Display	Proceed to
   Radio receiver (190)	RADIO RECEIVER POWER SOURCE CIRCUIT
   Stereo component amplifier (440)	STEREO COMPONENT AMPLIFIER POWER SOURCE CIRCUIT
   Multi-display (110)	MULTI-DISPLAY POWER SOURCE CIRCUIT
   Clock (1D6)	CLOCK POWER SOURCE CIRCUIT
   Television display (1F6)*1	TELEVISION DISPLAY POWER SOURCE CIRCUIT
   Disc player (1A0)*2	DISC PLAYER CONTROLLER POWER SOURCE CIRCUIT
   Rear power seat module switch (1C0)	REAR SEAT CONTROL SWITCH POWER SOURCE CIRCUIT
   HINT: *1: w/ Rear Seat Entertainment System *2: w/ Disc Player

Fig 2: Identifying Radio Receiver Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the L53, L51, L57 and L52 receiver connectors.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance: 

   for CD changer models 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   L53-9 (TXM+) - L53-10 (TXM-)	Always	60 to 80 Ω
   L51-5 (ATX+) - L51-15 (ATX-)	Always	60 to 80 Ω
   L57-9 (TX+) - L57-10 (TX-)	Always	60 to 80 Ω

   for DVD changer models 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   L53-9 (TXM+) - L53-10 (TXM-)	Always	60 to 80 Ω
   L51-5 (ATX+) - L51-15 (ATX-)	Always	60 to 80 Ω
   L52-9 (TX+) - L52-10 (TX-)	Always	60 to 80 Ω

NG: REPLACE RADIO RECEIVER ASSEMBLY (See  REMOVAL   ) 

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, check the AVC-LAN circuit between the navigation ECU and the component shown by the sub-code.
   1. Disconnect all connectors between the navigation ECU and the component shown by the sub-code.
   2. Check for an open or short in the AVC-LAN circuit between the navigation ECU and the component shown by the sub-code.

      OK : 

      There is no open or short circuit. 

      Fig 3: Identifying AVC-LAN Wiring Diagram

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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 ECU  (See REMOVAL )

OK: END