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Ihka Climate Control - Overview - E36: Adjustments BMW 3 series E46

Automatic HVAC System 2 illustrations ~128 words

Calibration Run

The control panel/module initiates a "calibration run" every 20th time the ignition switch is turned to "Off." The calibration run is necessary because the stepper motors move relative to the end-of-travel position (0% or 100%).

Identifying Control Panel/Module Coding Key. Scheme 21

Scheme 21: Identifying Control Panel/Module Coding Key

The IHKA control panel/module is coded with the central coding key (ZCS) using the DIS or MoDiC. The ZCS coding procedures is the same as on previous systems.

After coding a new or replacement control module, disconnect it from the battery completely (unplug the control module from the vehicle wiring harness) for a minimum of 10 seconds. This allows the new coding data to overwrite any previous coding data.

BMW Diagnosis Coding Data Display. Scheme 22

Scheme 22: BMW Diagnosis Coding Data Display