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Home >> Lexus >> 2005 >> GX 470 >> Repair and Diagnosis >> External Pages >> Different car >> Section 21 (LEXUS Navigation System - Diagnostics) >> Circuit Inspection >> 12. Map DISC cannot be inserted. >> Inspection Procedure
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Inspection Procedure

WARNING: This page is about a different car, the 2005 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check the MAP DISC. 
    1. NG: Replace the MAP DISC. 
    2. OK: Go To Next Step. 
  2. Insert a MAP DISC without tilt. 
    1. OK: Normal. 
    2. NG: Go To Next Step. 
  3. Check the navigation ECU power source circuit (see  POWER SOURCE CIRCUIT (NAVIGATION ECU)   ). 
    1. NG: Replace or repair wire harness. 
    2. OK: Replace the navigation ECU. 
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