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Home >> Toyota >> 2003 >> Land Cruiser >> Repair and Diagnosis >> External Pages >> Different car >> Section 518 (Navigation System - Diagnostics) >> Circuit Inspection >> Touch Switch Does Not Function (A/C Control Screen Only) >> Inspection Procedure
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Inspection Procedure

WARNING: This page is about a different car, the 2005 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
  1. Display check mode (Touch switch check screen) 
    1. NG: Replace the multi-display. 
    2. OK: Go to next step. 
  2. Check "AVC-LAN communication circuit". (See  AVC-LAN (COMMUNICATION BUS) CIRCUIT   ) 
    1. NG: Replace or repair AVC-LAN circuit. 
    2. OK: Go to next step. 
  3. Check wire harness between gateway ECU and A/C amplifier (Center ECU) (See  HOW TO USE THE DIAGNOSTIC TABLE AND INSPECTION  ) 
    1. NG: Repair or replace wire harness and connector. 
    2. OK: Check and replace A/C amplifier (Center ECU). 
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