Antitheft and Alarm Systems: Service Precautions

Precautions for Diagnosing Trouble

- Immobilizer control system is controlled by keyless start control module and ECM. Before confirming diagnosing troubles, refer to Precautions for Diagnosing Trouble Precautions for Diagnosing Trouble.
- Before using scan tool, read its "Operator's (Instructions) Manual" to know how to use it.
- Be sure to clear all DTCs after completing troubleshooting.