Inspection Procedure

1. Enter the "Navigation Check" mode (Vehicle Sensors) (see NAVIGATION CHECK MODE (VEHICLE SENSORS)  ).
   Fig 1: Displaying Vehicle Sensors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. While driving, compare the "SPD" indicator to the reading on the speedometer. Check if these readings are almost the same.

   OK: The readings are almost the same. 

OK: REPLACE NAVIGATION ECU (SEE  REPLACEMENT  ) 

NG: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  DIAGNOSTIC TROUBLE CODE CHART