Lighting System - How To Proceed With Troubleshooting

Lexus IS250 IS220d GSE20 ALE20 - LIGHTING


LIGHTING SYSTEM - HOW TO PROCEED WITH TROUBLESHOOTING

  • HINT:
Use these procedures to troubleshoot the lighting system.
*: Use the intelligent tester.

1.VEHICLE BROUGHT TO WORKSHOP
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2.CUSTOMER PROBLEM ANALYSIS CHECK AND SYMPTOM CHECK
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3.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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4.INSPECT MULTIPLEX COMMUNICATION SYSTEM (BEAN)*

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

  • Result:
  • ResultProceed to
    MPX DTC is not outputA
    MPX DTC is outputB
B.
Go to step 8
A
5.CHECK FOR DTC*
  • Result:
  • ResultProceed to
    DTC is not outputA
    DTC is outputB
B.
Go to step 8
A
6.PROBLEM SYMPTOMS TABLE
  • Result:
  • ResultProceed to
    If fault is not listed in problem symptoms tableA
    If fault is listed in problem symptoms tableB
B.
Go to step 8
A
7.OVERALL ANALYSIS AND TROUBLESHOOTING*

Data List / Active Test

Terminals of ECU

Inspection

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