"Engine off" time

Fig 1: Communication Diagram - "Engine off" time

Courtesy of SAAB-SCANIA OF AMERICA, INC.

The SID unit calculates how long the engine has been off using bus information from MIU (petrol cars) or from the engine control module (diesel cars) "ENGINE RUNNING", unit ON/OFF, and when the ignition (+15) has been turned OFF and then ON again, "ENGINE OFF TIME", unit minutes.

The information "ENGINE OFF TIME", unit minutes (max. 255 minutes) is sent out on the bus.