Inspection Procedure

NAVIGATION CHECK MODE
1. Enter the "Navigation Check Mode" (see NAVIGATION CHECK MODE ).
2. While driving, compare the "Speed" indicator to the reading on the speedometer. Check if these readings are almost the same.
  OK: The readings are almost the same.
  
  Fig 1: Identifying Speed Indicators
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. OK: REPLACE NAVIGATION ECU (SEE REPLACEMENT )
2. NG: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN DIAGNOSTIC TROUBLE CODE CHART (SEE DIAGNOSTIC TROUBLE CODE CHART )