Inspection Procedure

WARNING: This page is about a different car, the 2007 Lexus SC 430. However, it is still accessible from the selected car via links, so may be relevant.

CHECK VEHICLE SENSOR (NAVIGATION CHECK MODE)
1. Enter the Navigation Check mode's Vehicle Sensors check (see NAVIGATION CHECK MODE ).
  
  Fig 1: Display Navigation Check Mode (Vehicle Sensors) Screen
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the gyro voltage.
  Standard voltage:
  
  0.1 to 4.5 V
NG: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN DIAGNOSTIC TROUBLE CODE CHART

OK: REPLACE NAVIGATION ECU