Lexus IS250 IS220d GSE20 ALE20 2AD-FHV ENGINE CONTROL SYSTEM


ECD SYSTEM - HOW TO PROCEED WITH TROUBLESHOOTING

  • HINT:
Use the following procedures to troubleshoot the ECD system.
The intelligent tester should be used in steps 3, 4, 5, 7, and 9.

1.VEHICLE BROUGHT TO WORKSHOP
NEXT
2.CUSTOMER PROBLEM ANALYSIS
NEXT
3.CONNECT INTELLIGENT TESTER TO DLC3
  • HINT:
  • If the display indicates a communication error with the tester, inspect the DLC3.
NEXT
4.CHECK DTC AND FREEZE FRAME DATA
  • HINT:
  • Record or print DTCs and freeze frame data if necessary.
NEXT
5.CLEAR DTC AND FREEZE FRAME DATA
NEXT
6.CONDUCT VISUAL INSPECTION
NEXT
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 occursA
    Malfunction does not occurB
B.
SIMULATE SYMPTOMS
A
9.CHECK DTC
  • Result:
  • ResultProceed to
    Trouble codeA
    No trouble codeB
B.
Go to step 11
A
10.REFER TO DTC CHART
NEXT
Go to step 14
11.CONDUCT BASIC INSPECTION
  • Result:
  • ResultProceed to
    Malfunctioning parts not confirmedA
    Malfunctioning parts confirmedB
B.
Go to step 16
A
12.REFER TO PROBLEM SYMPTOMS TABLE
  • HINT:
Engine difficult to start or stalling .
Black smoke emitted .
Rough idling or excessive engine vibration .
Engine knocking or rattling .
Lack of power or hesitation .
  • Result:
  • ResultProceed to
    Malfunctioning circuit confirmedA
    Malfunctioning parts confirmedB
B.
Go to step 16
A
13.CHECK ECM POWER SOURCE CIRCUIT
NEXT
14.CONDUCT CIRCUIT INSPECTION
  • Result:
  • ResultProceed to
    Malfunction not confirmedA
    Malfunction confirmedB
B.
Go to step 17
A
15.CHECK FOR INTERMITTENT PROBLEMS
NEXT
Go to step 17
16.CONDUCT PARTS INSPECTION
NEXT
17.IDENTIFY PROBLEM
NEXT
18.ADJUST AND/OR REPAIR OR REPLACE
NEXT
19.CONDUCT CONFIRMATION TEST
NEXT
END
LEXUS IS250, IS220d / GSE20 ALE20
2AD-FHV ENGINE CONTROL SYSTEM
Lexus IS250 IS220d GSE20 ALE20
ECD SYSTEM