Inspection Procedure

WARNING: This page is about a different car, the 2007 Lexus GX 470. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

After the inspection is completed, clear the DTCs.

CHECK VEHICLE SENSOR (NAVIGATION CHECK MODE)

Fig 1: Diagnostic Tool Display - Vehicle Sensors Screen
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1. Enter the "NAVIGATION CHECK MODE " (Vehicle Sensors).
2. While driving the vehicle, compare the "SPD" indicator to the reading on the speedometer. Check if these readings are almost equal.
  OK: The readings are almost equal.
  
  OK: REPLACE NAVIGATION ECU
  
  NG: Go to Next Step
PROCEED TO NEXT INSPECTION PROCEDURE SHOWN IN PROBLEM SYMPTOMS TABLE
1. Refer to "Speed signal does not change in the navigation check mode" in PROBLEM SYMPTOMS TABLE .
  NEXT: END