3.1.12-6
CS35 2013.04
3.1.12-6Engine Immobilizer System
Symptom Chart
If there is symptom but no diagnosis trouble code (DTC) is stored in control module and can not confirm
symptom reasons in basic inspect, it is necessary to diagnosis and eliminate the symptoms in the follow-
ing chart.
Symptom Possible Sources Action
The key cannot match
•Key assembly
• Immobilizer controller
•BCM
• Inspect and replace the key assembly.
• Match the remote key.
• Inspect the circuit.
• Inspect and replace the BCM.
ECM always detect that the immobilizer
is enabled
• Wiring harness
•Key assembly
• Immobilizer controller
•ECM
•BCM
Refer to: ECM Always Detect
That Immobilizer Is Enabled
Fault Diagnosis (3.1.12 Engine
Immobilizer System, Symptom
Diagnosis and Testing).
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