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Home >> Lexus >> 2009 >> IS F >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Infotainment >> Navigation (Diagnostic Codes & Circuit Tests) >> Navigation System >> DTC 58-43: SPD Signal Error; DTC 80-43: SPD Signal Error >> Procedure

DTC 58-43: SPD Signal Error; DTC 80-43: SPD Signal Error: Procedure

  1. CHECK VEHICLE SENSOR (NAVIGATION CHECK MODE) 
    1. Enter the "Navigation Check" mode (Vehicle Sensors). Refer to OPERATION CHECK .
      Fig 1: Diagnostic Tool Display - Vehicle Sensors Screen
      GTY108366Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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.

    NG → See step   2 

    OK → See step   3 

  2. PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

    Refer to "Speed Signal does not Change in the Navigation Check Mode" in Problem Symptoms Table. Refer to PROBLEM SYMPTOMS TABLE .

    NEXT → END 

  3. REPLACE NAVIGATION ECU. Refer to  REMOVAL