Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2004 Chevrolet Optra (CANADA) L4-2.0LFACTORY OEM SERVICE PROCEDURE
Scan Tool Data Definitions
Scan Tool Data Definitions
The Theft Deterrent Immobilizer/Keyless Entry scan tool data definitions contain a brief description of all related parameters available on the scan tool. The parameters that are available on the scan tool are listed below in alphabetical order.
Last Alarm Cause
- The scan tool displays the cause of the alarm.
Last FOB Used
- The scan tool displays which key fob was last used.
Last Key Pressed On FOB
- The scan tool displays the last key pressed on the key fob.
2nd to Last Alarm Cause
- The scan tool displays the cause of the alarm.
3rd to Last Alarm Cause
- The scan tool displays the cause of the alarm.
4th to Last Alarm Cause
- The scan tool displays the cause of the alarm.
5th to Last Alarm Cause
- The scan tool displays the cause of the alarm.
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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