BMW 1992 525i Electrical Troubleshooting Manual page 416

l&wiiNTEGRATED CLIMATE REGULATION WITH FILTER (IHKR/F3)
... ...
iS
Pin Type Description/Function
Connection
~pe
ot
Signal Tester Display Measurement Notes
13
E Plus voltage supply for control unit Connector terminal 30 approx. 12V
14 Not used
15
A Right water valve activation
Control switch Frequency O%to 100% At 0% approx. 0 V
(square-wave at 100% approx. 12 V
voltage)
16
Not used
17
Not used
18
E Terminal15 (independent approx. 12V
ventilation only)
19
Not used
20 Not used
en
~
21
Not used
U1
0
.
22 A Left water valve activation
Control switch Frequency 0% to 100%
At 0% approx. 0 V
U1
I
(square-wave at 100% approx. 12 V
a.
voltage)
23 E Plus voltage supply for Connector terminal 15
approx. 12 V
control unit
24 Not used
25
E Terminal61 Unloader relay terminal 61 approx. OV OFF when engine stationary
approx. 12 V ON when engine running
26
E
Terminal30h Starter
approx. 12 V
when starting
X18157
Pin
"JYpe
Description/Function
Connection
TYpe of Signal Tester Display
Measurement Notes
1 A Plus for flap motors
All flap motors
approx. 11 V
......
2 A Plus for flap motors All flap motors approx. 11 V i§
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