A11 Heating and A/C control module

Connector overview

Number	X-pin, color	Description
X610	26-pin, blue	Connector 3 Heating and A/C control module
X611	12-pin, natural	Connector 4 Heating and A/C control module
X613	3-pin, natural	Connector 2 Heating and A/C control module
X18153	6-pin, black	Connector 5 Heating and A/C control module
X18341	3-pin, black	Connector 0 Heating and A/C control module

Pin assignments at connector X610

Pin	Type	Description / Signal type	Connection / Measuring notes
1	E	Voltage supply, terminal 15	Fuse F20

2		Not used

3	E/A	K-bus signal line	K-bus splice

4	E	Consumer cut-off signal	Consumer cut-off splice

5	A	Left water valve control	Water valve assembly Left valve

6	A	Right water valve control	Water valve assembly Right valve

7	A	Relay control Rear defogger relay	Rear defogger relay

8	A	Signal Heated washer jets	Connector, heated washer jets

9	A	Auxiliary water pump control with park heating, Auxiliary water pump control with latent heat accumulator	Auxiliary water pump with park heating, Connector, auxiliary water pump with latent heat accumulator

10	E	Pressure signal	High pressure switch

11		Not used

12	E	Signal input	Automatic air recirculation sensor

13	A	Voltage control	Automatic air recirculation sensor

14		Not used

15	A	A/C system standby signal	DDE control module

16	A	Signal, A/C compressor ON (M51)	DDE control module

17	A	Signal, A/C compressor OFF (M51) A/C compressor signal	DDE control module Engine control module (DME) Digital diesel electronics control unit

18	E	Auxiliary fan normal speed relay control	Connector, auxiliary fan stage 1

19		Not used

20	M	Ground High pressure switch	High pressure switch

21	A	Power High pressure switch	High pressure switch

22	A	Shut-down signal with latent heat accumulator:	Connector, auxiliary water pump with latent heat accumulator:

23	E	Nighttime illumination signal	Terminal 58g splice

24		Not used

25	M	Ground AUC sensor, heating	Automatic air recirculation sensor

26	A	Voltage control AUC sensor, heating	Automatic air recirculation sensor

Pin assignments at connector 4 X611

Pin	Type	Description / Signal type	Connection / Measuring notes
1	A	Sensor signal	LH heat exchanger temperature sensor

2	A	Sensor signal	RH heat exchanger temperature sensor

3	A	Sensor signal	Evaporator temperature sensor

4	A	Signal Final stage unit	Final stage unit

5	A	Signal Rear mixing actuator	Rear mixing actuator

6	M	Sensor ground	Sensor connector

7	E	Actuating signal Fresh air flap motor	Fresh air flap motor

8	A	Actuating signal Fresh air flap motor	Fresh air flap motor

9	A	Actuating signal Fresh air flap motor	Fresh air flap motor

10	E	Actuating signal Fresh air flap motor	Fresh air flap motor

11	A	Signal Rear mixing actuator	Rear mixing actuator

12		Not used

Pin assignments at connector 2 X613

Pin	Type	Description / Signal type	Connection / Measuring notes
1	A	Voltage control	Footwell/rear compartment actuator motor

2	E	Actuator motors ground	Footwell/rear compartment actuator motor

3	E/A	MI-bus	Footwell/rear compartment actuator motor

Pin assignments at connector 5 X18153

Pin	Type	Description / Signal type	Connection / Measuring notes
1	A	Relay control Relay for latent heat accumulator	Relay for latent heat accumulator

2	A	Park heating ON signal Valve control Changeover valve LWS	Park heating relay Changeover valve LWS

3	A	Park heating ON feedback signal	Independent park/auxiliary heating

4	A	Sensor signal	NTC resistor, steering angle sensor

5	M	Sensor ground	NTC resistor, steering angle sensor

6	A	Valve control Shutoff valve LWS	Shutoff valve LWS

Pin assignments at connector 0 X18341

Pin	Type	Description / Signal type	Connection / Measuring notes
1	E	Throttle actuator terminal 30 voltage supply	Fuse F9

2	A	Magnetic clutch voltage supply	High pressure switch (M51) Heating and A/C control module

3	M	Ground	Ground splice X219