Navigation System How To Proceed With Troubleshooting

Body Electrical. Lexus Gs430, Gs300. Uzs190 Grs190
Navigation. Lexus Gs430, Gs300. Uzs190 Grs190

  1. VEHICLE BROUGHT TO WORKSHOP

  2. INSPECT BATTERY VOLTAGE

  3. INSPECT COMMUNICATION FUNCTION OF LARGE-SCALE MULTIPLEX COMMUNICATION SYSTEM (BEAN)

  4. BASIC INSPECTION

  5. CHECK FOR DTC

  6. PROBLEM SYMPTOMS TABLE

  7. OVERALL ANALYSIS AND TROUBLESHOOTING

  8. ADJUST, REPAIR OR REPLACE

  9. CONFIRMATION TEST

Navigation System -- How To Proceed With Troubleshooting


HINT:
  1. Use these procedures to troubleshoot the navigation system.
  2. The intelligent tester should be used in step 3.


1.VEHICLE BROUGHT TO WORKSHOP

    NEXT


    2.INSPECT BATTERY VOLTAGE
      Standard voltage:
      11 to 14 V
      1. If the voltage is below 11 V, recharge or replace the battery before proceeding.

    NEXT


    3.INSPECT COMMUNICATION FUNCTION OF LARGE-SCALE MULTIPLEX COMMUNICATION SYSTEM (BEAN)

    1. Using the intelligent tester to check if the Multiplex Communication System (MPX) is functioning normally.

      Result:
      Result
      		Proceed to
      MPX DTC is not output
      		A
      MPX DTC is output
      		B


    		B.
    Go to MULTIPLEX COMMUNICATION SYSTEM
    A


    4.BASIC INSPECTION

    1. Turn the engine switch on (ACC).

    2. Check whether or not the multi-display turns on.

      Result:
      Result
      		Proceed to
      Display turns on
      		A
      Display does not turn on
      		B


    		B.
    Go to step 6
    A


    5.CHECK FOR DTC

    1. Check for DTCs and note any codes that are output.

    2. Delete the DTC.

    3. Recheck by simulating the operation indicated by the DTC.

      HINT:
      1. If the system cannot enter the diagnosis mode, inspect each AVC-LAN communication signal and repair or replace problem parts.
      2. Even if the malfunction symptom is not confirmed, check the DTCs. This is because the system stores past DTCs.
      3. Refer to the detailed description on the diagnostic screen as necessary.
      4. Check and clear past DTCs. Then check for DTCs.
        Result:
        Result
        		Proceed to
        DTC does not reoccur
        		A
        DTC reoccurs
        		B


    		B.
    Go to step 7
    A


    6.PROBLEM SYMPTOMS TABLE
      Refer to the problem symptoms table (Click here).
      Result:

      Result
      		Proceed to
      Fault is not listed in problem symptoms table
      		A
      Fault is listed in problem symptoms table
      		B


    		B.
    Go to step 8
    A


    7.OVERALL ANALYSIS AND TROUBLESHOOTING

    1. Terminal of ECU (Click here).


    NEXT


    8.ADJUST, REPAIR OR REPLACE

      NEXT


      9.CONFIRMATION TEST

        NEXT

        END