Class 2 Serial Data Communication

The Class 2 network continually monitors various subsystems (i.e. ATC, BCM, HVAC, IPC, PCM, and VCM) and operating conditions for possible system malfunctions. Compare the system conditions against standard operating limits in order to detect certain circuit and component malfunctions. A 5-digit alphanumeric Diagnostic Trouble Code (DTC) is stored in the computer memory. When a malfunction is detected by this self-diagnostic system, the DTC(s) may later be retrieved by the service technician using a scan tool. The scan tool may aid the technician in repairing various subsystems.