Sfi System - How To Proceed With Troubleshooting

Lexus IS250 IS220d GSE20 ALE20 4GR-FSE ENGINE CONTROL SYSTEM


SFI SYSTEM - HOW TO PROCEED WITH TROUBLESHOOTING

  • HINT:
  • *: Use the intelligent tester.

1.VEHICLE BROUGHT TO WORKSHOP
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2.CUSTOMER PROBLEM ANALYSIS
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3.CONNECT INTELLIGENT TESTER TO THE DLC3*
  • HINT:
  • If the display indicates a communication fault in the tester, inspect the DLC3.
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4.CHECK DTC AND FREEZE FRAME DATA*
  • HINT:
  • Record or print DTCs and freeze frame data, if necessary.
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5.CLEAR DTC AND FREEZE FRAME DATA*
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6.CONDUCT VISUAL INSPECTION
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7.SET CHECK MODE DIAGNOSIS*
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8.CONFIRM PROBLEM SYMPTOMS
  • HINT:
  • If the engine does not start, perform steps 10 and 12 first.
  • Result:
  • ResultProceed to
    Malfunction does not occurA
    Malfunction occurB
B.
GO TO STEP 10
A
9.SIMULATE SYMPTOMS
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10.CHECK DTC*
  • Result:
  • ResultProceed to
    Malfunction codeA
    No codeB
B.
GO TO STEP 12
A
11.REFER TO DTC CHART
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GO TO STEP 14
12.CONDUCT BASIC INSPECTION
  • Result:
  • ResultProceed to
    Malfunctioning parts not confirmedA
    Malfunctioning parts confirmedB
B.
GO TO STEP 17
A
13.REFER TO PROBLEM SYMPTOMS TABLE
  • Result:
  • ResultProceed to
    Malfunctioning circuit confirmedA
    Malfunctioning parts confirmedB
B.
GO TO STEP 17
A
14.CHECK ECM POWER SOURCE CIRCUIT
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15.CONDUCT CIRCUIT INSPECTION
  • Result:
  • ResultProceed to
    Malfunction not confirmedA
    Malfunction confirmedB
B.
GO TO STEP 18
A
16.CHECK FOR INTERMITTENT PROBLEMS
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GO TO STEP 18
17.CONDUCT PARTS INSPECTION
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18.IDENTIFY PROBLEM
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19.ADJUST AND/OR REPAIR
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20.CONDUCT CONFIRMATION TEST
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END