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Home >> Lexus >> 2007 >> RX 400h AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 83 (Navigation) >> AVC-LAN Circuit >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2006 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
  1. REPLACE STEREO COMPONENT CONTROLLER ASSEMBLY 
    1. Replace the stereo component controller assembly with a normal panel.
    2. Check that the display changes by pressing either of the Panel or Touch switches on the display.

      HINT:

      It can be determined that the AVC-LAN has recovered if the display is changed.

    • OK: REPLACE STEREO COMPONENT CONTROLLER ASSEMBLY 
    • NG: GO TO NEXT STEP 
  2. CHECK WIRE HARNESS (RADIO RECEIVER - STEREO COMPONENT CONTROLLER) 
    • NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
    • OK: GO TO NEXT STEP 
  3. REPLACE NAVIGATION ECU 
    1. Replace the navigation ECU with a normal ECU.
    2. Check that the display changes by pressing either of the Panel or Touch switches on the display.

      HINT:

      It can be determined that the AVC-LAN has recovered if the display is changed.

    • OK: REPLACE NAVIGATION ECU 
    • NG: GO TO NEXT STEP 
  4. CHECK WIRE HARNESS (NAVIGATION ECU - MULTI-DISPLAY) 
    • NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
    • OK: GO TO NEXT STEP 
  5. REPLACE NETWORK GATEWAY ECU 
    1. Replace the gateway ECU with a normal ECU.
    2. Check that the display changes by pressing either of the Panel or Touch switches on the display.

      HINT:

      It can be determined that the AVC-LAN has recovered if the display is changed.

    • OK: REPLACE NETWORK GATEWAY ECU 
    • NG: GO TO NEXT STEP 
  6. CHECK WIRE HARNESS (MULTI-DISPLAY - NETWORK GATEWAY ECU) 
    • NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
    • OK: GO TO NEXT STEP 
  7. SKIP MULTI-DISPLAY AND CHECK AVC-LAN 
    1. Disconnect the M5 and M6 display connectors.
    2. Using SSTs (Diagnosis check wire P/N 09893-12040), connect the terminal TX1+ of connector "M5" and TX+ of connector "M6", the terminal TX1- of connector "M5" and TX- of connector "M6" respectively of the multi-display.
    3. Operate radio receiver assembly (CD, Cassette tape, etc.) and check that sound comes out from the speaker. (Check that AVC-LAN is recovered.)
    • OK: REPLACE MULTI-DISPLAY 
    • NG: GO TO NEXT STEP 
  8. SKIP TELEVISION CAMERA ECU AND CHECK AVC-LAN 
    1. Disconnect the T21 ECU connector.
    2. Using SSTs (Diagnosis check wire P/N 09893-12040), connect the terminal TX1+ and TX+ of connector "T21", the terminal TX- of connector and TX1- of connector "T21" respectively of the multi-display.
    3. Operate the radio receiver assembly (CD, Cassette tape, etc.) and check that sound comes out from the speaker. (Check that AVC-LAN is recovered.)
    • OK: REPLACE TELEVISION CAMERA ECU 
    • NG: GO TO NEXT STEP 
  9. SKIP RADIO RECEIVER ASSEMBLY AND CHECK AVC-LAN 
    1. Disconnect the R38 receiver connector.
    2. Using SST (Navigation Check Wire P/N 09843-18050), connect the terminal TX+ to terminal TX- of "R38" connector of the radio receiver assembly.
    3. Operate the panel switch and the touch switch of the multi-display and check that the navigation functions. (Check that AVC-LAN is recovered.)
    • OK: REPLACE RADIO RECEIVER ASSEMBLY 
    • NG: REPLACE NAVIGATION ECU 
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