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.

Check the mark display. (At a place with a fine view, is GPS mark displayed or not?)
1. YES: Normal.
2. NO: Go To Next Step.
Check if the harness is caught or sharply bent or not.
1. NG: Navigation antenna is surely connected.
2. OK: Go To Next Step.
Check optional components. (Does it become normal if the optionals such as the theft deterrent system are removed?)
1. YES: Remove or change the position of the components.
  HINT:
  
  Some optionals receive radio signals, and if this happens, GPS reception may be affected.
2. NO: Go To Next Step.
Is there anything such as a film stuck to the window?
1. YES: Reception may be affected by a screen such as a film.
2. NO: Go To Next Step.
Service check mode. (Is "80-40, 41" is displayed in the unit check mode of the navigation ECU?)
1. YES: Troubleshoot for each diagnosis.
2. NO: Replace the navigation antenna.
HINT:

If the trouble still occurs, replace the navigation ECU.