BMW 1992 525i Electrical Troubleshooting Manual page 413

lsswiiNTEGRATED CLIMATE REGULATION WITH FILTER (IHKR/F3)
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Pin Assignments
A=18155 26 Pins, white
8=18156
26 Pins, black
C=18157 26 Pins, blue
X18155
Pin 'f\'pe Description/Function Connection
Type of Signal
1 Not used
2 E
Right heater temperature Right heater sensor approx. 0.7 V to
4.3V
3
E Lett heater temperature Left heater sensor approx. 0.7 V to
4.3V
4 E Outside temperature Outside temperature sensor
approx. 0.5 V to
4.5V
5 E Evaporator temperature Evaporator sensor
approx. 1.6 V to
3.4V
6
E Nominal mixing value Temp. dist. pot.
approx. 1.6 V to
2.7V
7 E Independent ventilation Relay box
approx. OV
approx. 11 V
Tester Display Measurement Notes
0° C to 90° C approx. 5 V with
temperature sensor
disconnected
0° C to 90° C approx. 5 V with
temperature sensor
disconnected
-40° C to 40° C
approx. 5 V with
temperature sensor
disconnected
-5° C to 26° C approx. 5 V with
temperature sensor
disconnected
approx. 0% to
100%
ON
OFF
....
.....
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