7 Series E38 740iL (M60-2) SAL
VK-221/Nortmeyer
Baugruppe/Group: 64
64 01 98 (284)
Sonderverteiler
special
distribution
01/1998
Failure of air conditioning operating unit
E38 with automatic air conditioning system (IHKA)
Complaint:
Malfunction of IHKA operating unit display function; no or only meaningless displays.
Operation of the automatic air conditioning system not possible.
Cause:
IHKA circuit board fitted with incorrect resistor.
Affected
vehicles:
E38 with automatic air conditioning system (option 534), standard equipment M73 and
US models
Manufacturing period: November 1994 up to November 1995
Remedy:
In case of customer complaint, the unnecessary resistor R58 should be removed from the
circuit board of the IHKA operating unit.
Procedure:
See Enclosure 1.
Important:
The components of the IHKA operating unit are highly sensitive to electrostatic
charges. It is essential that the IHKA operating unit is placed on an anti-static
mat for the duration of the repair! In order to balance the electrostatic charge,
wear the wrist sleeve and connect this to the anti-static mat, which should also
be earthed. Connect the long output cable from the earth distributor to a suitable
earth distributor (e.g. central heating radiator, water pipe - Item 8, Figure 1).
Connect the second earth cable connector (Item 6, Figure 1) on the anti-static
mat with a cable and crocodile clip to the IHKA operating unit housing.
Parts required:
SI Failure of air conditioning operating unit E38 with automatic air conditioning s
BMW AG - TIS
14.02.2013 01:11
Issue status (12/2007) Valid only until next DVD is issued
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