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Home › Lexus › 2001 › LS 430 › Repair and Diagnosis › External Pages › Different car › Section 248 (LEXUS Navigation System - Diagnosis) › Circuit Inspection › 12. Map DISC cannot be inserted. › Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2002 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check MAP DISC visually. 
    1. NG:  Replace MAP DISC.
    2. OK:  Go to next step.
  2. Insert MAP DISC without tilt. 
    1. OK:  Normal.
    2. NG:  Go to next step.
  3. Check navigation ECU. 
    1. PREPARATION:  Disconnect the navigation ECU connector.
    2. CHECK:  Check the voltage of terminal +B.
      1. OK:  +B: 10-14 V
    3. CHECK:  Check the voltage of terminal ACC when the ignition switch is in ACC or ON position.
      1. OK:  ACC: 10-14 V
    4. CHECK:  Check continuity at terminal GND.
      1. OK:  GND: Continuity
    1. NG:  Replace or repair wire harness or connector.
    2. OK:  Replace navigation ECU.
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