THEFT-DETERRENT SYSTEM [THEFT-DETERRENT SYSTEM]
id0903l1112700
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Description |
Theft-deterrent siren or theft-deterrent horn sounded |
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Possible cause
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• Wiring harness malfunction
• Malfunction in switch which triggers system
• BCM malfunction
• Customer's mis-operation or misunderstanding
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System wiring diagram
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Not applicable
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Diagnostic Procedure
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Step |
Inspection |
Action |
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1
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VERIFY DTCs
• Perform the DTC inspection for the BCM using the M-MDS.
(See DTC INSPECTION [BCM].)
• Are any DTCs displayed?
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Yes
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Go to the applicable DTC inspection.
(See DTC TABLE [BCM].)
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No
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Go to the next step.
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2
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VERIFY OPERATION RECORD
• Has the operation record been stored?
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Yes
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Go to the next step.
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No
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Diagnosis completed (theft-deterrent system does not operate).
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3
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VERIFY CONDITION DURING THEFT-DETERRENT SYSTEM OPERATION
• Is the condition during theft-deterrent operation “Alarm” or “Arming”?
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Yes
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Go to the next step.
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No
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Inspect the BCM. If there is any malfunction, replace it.
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4
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DETERMINE IF MALFUNCTION CAUSE IS SYSTEM
• Verify what triggered the theft-deterrent system according to the trigger record, and inspect the switch which triggered the system and the related wiring harness.
• Is the switch or related wiring harness normal?
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Yes
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System is normal (explain to the customer that the cause is customer's mis-operation).
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No
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Replace the malfunctioning part.
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