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Navigation Function

WARNING: This page is about a different car, the 2005 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.
PROBLEM SYMPTOMS TABLE - NAVIGATION FUNCTION

Symptom Verification
Map disc cannot be inserted.
  1. "MAP DISC CANNOT BE INSERTED"
  2. Power source circuit (radio and navigation assy)
  3. Replace radio and navigation assy
Map disc cannot be ejected.
  1. "MAP DISC CANNOT BE EJECTED"
  2. Power source circuit (radio and navigation assy)
  3. Replace radio and navigation assy
Vehicle position mark deviates greatly.
  1. "VEHICLE POSITION MARK DEVIATES GREATLY"
  2. Replace GPS antenna assy
  3. Replace radio and navigation assy
Cursor or map rotates when vehicle is stopped.
  1. "CURSOR OR MAP ROTATES WHEN VEHICLE IS STOPPED"
  2. Replace radio and navigation assy
Vehicle position mark is not updated.
  1. "VEHICLE POSITION MARK IS NOT UPDATED"
  2. Replace map disc
  3. Replace radio and navigation assy
Current position display does not appear.
  1. "CURRENT POSITION DISPLAY DOES NOT APPEAR"
  2. Replace map disc
  3. Replace radio and navigation assy
GPS mark is not displayed.
  1. "GPS MARK IS NOT DISPLAYED"
  2. Replace GPS antenna assy
  3. Replace radio and navigation assy
Voice guidance does not function.
  1. "VOICE GUIDANCE DOES NOT FUNCTION"
  2. Speaker circuit (navigation voice)
  3. Replace map disc
  4. Replace radio and navigation assy
Map display incomplete.
  1. "MAP DISPLAY INCOMPLETE"
  2. Replace map disc
  3. Replace radio and navigation assy
Route cannot be calculated.
  1. "ROUTE CANNOT BE CALCULATED"
  2. Replace map disc
  3. Replace radio and navigation assy