Mode 2: Calibration Run

The objective of the calibration procedure is to correct the position drift of the servomotors for temperature and air distribution control. During a calibration run:

• Both servomotors are driven to their two end positions and the new values stored in the IHKA EEPROM.
• All LED's activated simultaneously.
• Blower streamer bars individually illuminated.
• CA flashes in the central display panel at 0.5 Hz.

Fig 1: IHKA Fault Codes Description

Courtesy of BMW OF NORTH AMERICA, INC.

There are three possible operating statuses shown in the central display:

• CA = Calibration Active
• CC = Calibration Complete
• FF = Fault