Inspection Procedure

HINT:

If the vehicle has a navigation system, "multi-display" refers to the "display and navigation module display".

1. CHECK POWER SOURCE CIRCUIT 
   1. w/ Navigation System: Refer to the Display and Navigation Assembly Power Source Circuit (See DISPLAY AND NAVIGATION ASSEMBLY POWER SOURCE CIRCUIT ).
   2. w/o Navigation System: Refer to the MULTI-DISPLAY POWER SOURCE CIRCUIT  (See ).

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

2. INSPECT RADIO RECEIVER ASSEMBLY 
   Fig 1: Identifying F1, F23 And F24 Receiver Connectors Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Disconnect the F1, F23 and F24 receiver connectors.
   2. Measure the resistance according to the value (s) in the table below.

      Standard Resistance 

      STANDARD RESISTANCE
      
      

      Tester Connection	Condition	Specified Condition
      F1-5 (ATX+) - F1-15 (ATX-)	Always	60 to 80 Ω
      F23-9 (TX+) - F23-10 (TX-)	Always	60 to 80 Ω
      F24-9 (TXM+) - F24-10 (TXM-)	Always	60 to 80 Ω

   NG: REPLACE RADIO RECEIVER ASSEMBLY  (See REMOVAL  )

   OK: Go to next Step 

3. IDENTIFY COMPONENT WHICH HAS STORED THIS CODE 
   1. Enter the diagnostic mode.
   2. Press the "LAN Mon" switch to change to "LAN Monitor" mode.
   3. Identify the component which has stored this code.

      Component Table 

      COMPONENT CHART
      
      

      Display	Component
      AUDIO	Radio receiver
      DSP-AMP	Stereo component amplifier
      EMVN(1)	Display and navigation module display
      EMV(2)	Multi-display
      CAMERA-C(3)	Parking assist ECU
      XM(4)	Stereo component tuner
      RSE(5)	Television display
      (1) w/ Navigation System (2) w/o Navigation System (3) w/ Wide View Front and Side Monitor System (4) w/ SDARS System (5) w/ Rear Seat Entertainment System

      HINT:

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

      Fig 2: Identifying NAVI Component

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - COMPONENT WHICH HAS STORED THIS CODE) 

   HINT:

   For details of the connectors, refer to TERMINALS OF ECU  (See ).

   1. Referring to the AVC-LAN wiring diagram, 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: Go to next Step 

5. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - RADIO RECEIVER) 

   HINT:

   For details of the connectors, refer to TERMINALS OF ECU  (See ).

   1. Referring to the AVC-LAN wiring diagram, 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: Go to next Step 

6. REPLACE MULTI-DISPLAY WITH NORMAL ONE AND CHECK 
   1. w/ Navigation System: Replace the display and navigation module display with a normal one and check if the same problem occurs again (See REMOVAL ).
   2. w/o Navigation System: Replace the multi-display with a normal one and check if the same problem occurs again (See REMOVAL  ).

      OK: Same problem does not occur. 

   NG: REPLACE COMPONENT WHICH HAS STORED THIS CODE 

   OK: END