Theft Deterrent System (W/O Intrusion Sensor) - How To Proceed With Troubleshooting

Lexus IS250 IS220d GSE20 ALE20 - THEFT DETERRENT


THEFT DETERRENT SYSTEM (w/o Intrusion Sensor) - HOW TO PROCEED WITH TROUBLESHOOTING

  • HINT:
Use this procedure to troubleshoot the theft deterrent system.
The intelligent tester should be used in step 3.

1.VEHICLE BROUGHT TO WORKSHOP
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2.CUSTOMER PROBLEM ANALYSIS

Interview the customer to confirm the trouble

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3.INSPECT COMMUNICATION FUNCTION OF MULTIPLEX COMMUNICATION SYSTEM (BEAN)

Use the intelligent tester to check for normal function of the multiplex communication system.


(ECU unconnected, communication line malfunctioning) If no code is output, proceed to A.

(ECU unconnected, communication line malfunctioning) If any code is output, proceed to B.

B.
Go To MULTIPLEX COMMUNICATION SECTION
A
4.SYMPTOM SIMULATION
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5.PROBLEM SYMPTOMS TABLE

If the fault is not listed on the problem symptoms table, proceed to A.

If the fault is listed on the problem symptoms table, proceed to B.

B.
Go to step 7
A
6.PERFORM TROUBLESHOOTING ACCORDING TO MALFUNCTION SYMPTOM

Terminals of ECU

On-vehicle inspection

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