Audio And Visual System - How To Proceed With Troubleshooting

Lexus IS250 IS220d GSE20 ALE20 - AUDIO / VISUAL


AUDIO AND VISUAL SYSTEM - HOW TO PROCEED WITH TROUBLESHOOTING


1.VEHICLE BROUGHT TO WORKSHOP
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2.INSPECT BATTERY VOLTAGE
  • Standard voltage:
  • 11 to 14 V
If the voltage is below 11 V, recharge or replace the battery before proceeding.
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3.BASIC INSPECTION

Turn the engine switch on (IG).

Check whether or not the radio receiver turns on.

  • Result:
  • ResultProceed to
    Radio receiver turns onA
    Radio receiver does not turn onB
B.
Go to step 6
A
4.CHECK FOR DTC

Check for DTCs and note any codes that are output.

Delete the DTCs.

Recheck by simulating the operation indicated by the DTC.

  • HINT:
If the system cannot enter the diagnosis mode, inspect the AVC-LAN and all the components that connect to the AVC-LAN for short circuits and repair or replace the problem part.
Even if the malfunction symptom is not confirmed, check the DTCs. This is because the system stores past DTCs.
Check and clear past DTCs. Then check for DTCs.
  • Result:
  • ResultProceed to
    DTC is output againA
    DTC is not outputB
B.
Go to step 6
A
5.DIAGNOSTIC TROUBLE CODE CHART

Find the output code on the diagnostic trouble code chart .

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Go to step 8
6.PROBLEM SYMPTOMS TABLE

Refer to the problem symptoms table .

  • Result:
  • ResultProceed to
    Fault is not listed in problem symptoms tableA
    Fault is listed in problem symptoms tableB
B.
Go to step 8
A
7.OVERALL ANALYSIS AND TROUBLESHOOTING

Terminals of ECU .

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8.ADJUST, REPAIR OR REPLACE
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9.CONFIRMATION TEST
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END