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Layout And Pin Assignment For IHKA Basic

WARNING: This page does not describe the selected car, but rather 33 other vehicles, including the 2010 BMW M5, 2009 BMW M5, 2008 BMW M5, 2008 BMW 760Li, and 2007 BMW M5. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Control Panel IHKA Basic
G00431727Courtesy of BMW OF NORTH AMERICA, INC.

Pin Assignment For Connector X18793, 18-Pin Black 

PIN ASSIGNMENT FOR IHKA BASIC CONNECTOR X18793, 18-PIN BLACK

Pin Type Description
1 E/A LIN bus, data
2 - -
3 E Signal from refrigerant pressure sensor
4 V Terminal 15, power supply for refrigerant pressure sensor
5 - -
6 E/A CAN-bus high
7 E/A CAN-bus low
8 M Earth for refrigerant pressure sensor
9 - -
10 V Terminal 30, power supply
11 A Control valve in A/C compressor
12 A Water valve
13 A Auxiliary water pump
14 A Relay for heated rear window
15 A Heated washer jets
16 E PWM signal from DDE for electric auxiliary heater
17 - -
18 M Earth point, terminal 31
A = Output
E = Input
E/A = Input and output
M = Earth
V = Supply
For current specifications regarding pin assignments, please refer to BMW diagnosis system
PIN ASSIGNMENT FOR IHKA BASIC CONNECTOR X01130, 12-PIN BLACK

Pin Type Description
1 E Signal from heating system heat exchanger sensor
2 - -
3 E Signal from evaporator temperature sensor
4 - -
5 - -
6 M Earth point for sensors
7 A PWM signal to electric auxiliary heater
8 - -
9 - -
10 V LIN bus, supply
11 E/A N bus, data
12 M LIN bus, earth
A = Output
E = Input
E/A = Input and output
M = Earth
V = Supply
For current specifications regarding pin assignments, please refer to BMW diagnosis system