Changes To 5 Series (E39) IHKA Control Panel

The operation and appearance of the IHKA on the E39 as of 9/96 production has changed only slightly:

On the LCD display the new "AUTO-symbol" replaced the fan symbol, indicating activation of the automatic blower speed program.

The lit LED on the "AUTO-button" indicates activation of the automatic air distribution.

Fig 1: Identifying IHKA Control Panel

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: From 9/96 to 3/97 Production: When in the automatic blower speed mode, the "AUTO-symbol" and the blower wedge silhouette will be displayed

Fig 2: Identifying Auto Symbol & Fan Operation (1 Of 2)

Courtesy of BMW OF NORTH AMERICA, INC.

After 3/97 Production:

When in automatic blower speed mode, the "AUTOsymbol" and the actual blower speed indicated by the bars, will be displayed. The number of bars will automatically change as the auto control of the blower takes place.

Fig 3: Identifying Auto Symbol & Fan Operation (2 Of 2)

Courtesy of BMW OF NORTH AMERICA, INC.

If the plus or minus fan speed button is pressed when in the auto mode, the "AUTO-symbol" in the display will be turned off and the manual blower speed control takes place. Blower speed is indicated by the bars.

At the same time the automatic air distribution program is still active and the LED in the "AUTO-button" will be:

1. turned off - from 9/96 to 3/97 production

2. turned on - after 3/97 production

Fig 4: Identifying IHKA Control Panel

Courtesy of BMW OF NORTH AMERICA, INC.

If one of the air distribution buttons is pressed when in the auto mode (1), the air distribution will come out of the automatic program, however, the automatic blower speed program will remain active and the "AUTO-symbol" will continue to be displayed in the LCD panel.

NOTE: If the control module is replaced it must be coded.

Fig 5: Identifying E39 IHKA Control Panel Module Connection Specification

Courtesy of BMW OF NORTH AMERICA, INC.