Inspection Procedure

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