Scan Tool Testing and Procedures

Description of reading off alarm causes

The data is read out as follows

Actual time
Indicates how long the internal clock in the central electronic module (CEM) has counted, displayed in days. The actual time gives a reference value which can be used to calculate the number of days since the last alarm. Subtract the value in Time from the value of Actual time to calculate the number of days since the last alarm.

Time
Indicates how long the internal clock in the central electronic module (CEM) had counted until the time the alarm deployed. The highest number is the latest alarm.

Alarm cause
Indicates the component in the car that caused the alarm.
- Front door right
- Front door left
- Rear door right
- Rear door left
- Hood
- Luggage Compartment Lid
- Ignition switch
- Vehicle tilt sensor
- Voltage drop siren
- Glass breakage sensor activated
- Mass movement sensor rear, standard for MMS for S60, S80, V70, and XC70. Rear MMS for XC90, or movement sensor (IMS) (IMS replaces MMS for XC90 from and incl. model year 2012).
- Mass movement sensor front, front MMS for XC90 (IMS replaces MMS for XC90 from and incl. model year 2012).