System overview IHKA: E60, E61, E63, E64

For technical reasons, the system overview is split up as follows:
  • Input/Output integrated automatic heating and air-conditioning system in basic version
  • Integrated automatic heating and air-conditioning system in basic version system wiring diagram
  • Input/Output integrated automatic heating and air-conditioning system in High version
  • Integrated automatic heating and air-conditioning system in High version system wiring diagram
  • Input/Output electric auxiliary heater (only diesel engine)
  • System wiring diagram for electric auxiliary heater (only diesel engine)
  • Input/Output auxiliary heater
  • System wiring diagram for auxiliary heater
  • Heater circuit for engine M54B22/B30 (integrated automatic heating and air-conditioning system in basic version)
  • Heater circuit for engine M54B22/B30 with auxiliary heater (integrated automatic heating and air-conditioning system in basic version)
  • Heater circuit for engine M54B22/B30 (integrated automatic heating and air-conditioning system in High version)
  • Heater circuit for engine M54B22/B30 with auxiliary heater (integrated automatic heating and air-conditioning system in High version)
  • Heater circuit for engine M57D30TU (integrated automatic heating and air-conditioning system in basic version)
  • Heater circuit for engine M57D30TU (with auxiliary heater) (integrated automatic heating and air-conditioning system in basic version)
  • Heater circuit for engine M57D30TU (integrated automatic heating and air-conditioning system in High version)
  • Heater circuit for engine M57D30TU with auxiliary heater (integrated automatic heating and air-conditioning system in High version)
  • Overview of the components of the air conditioning

- Input/Output integrated automatic heating and air-conditioning system in basic version

Item Explanation Item Explanation
1 Body Gateway Module (KGM) from 09/2005 2 Safety and gateway module (SGM) up to 09/2005
3 Digital Engine Electronics (DME) or Digital Diesel Electronics (DDE) 4 Central information display (CID)
5 Multi-audio system controller (M-ASK) 6 Controller
7 Electric auxiliary heater, integrated in heat exchanger for heating system 8 Fresh air / recirculated air flap motor, left
9 Fresh air / recirculated air flap motor, right 10 Ventilation flap motor
11 Cold-air flap motor 12 Footwell flap motor
13 Defroster flap motor 14 Blower with blower output stage
15 Relay for heated rear window 16 Left and right washer jet heating
17 Electric auxiliary coolant pump 18 Air conditioning compressor
19 Heater valve in the heater circuit 20 IHKA control panel/control unit with integrated interior temperature sensor
21 Front fuse and relay module 22 Evaporator temperature sensor
23 Heating heat exchanger sensor 24 Refrigerant pressure sensor
25 Outside temperature sensor 26 Instrument panel (KOMBI)
Body CAN Body CAN LIN bus Local interconnect network bus
PT-CAN Drivetrain CAN    

- System wiring diagram integrated automatic heating and air-conditioning system in basic version

Item Explanation Item Explanation
1 Multi-audio system controller (M-ASK) 2 Central information display (CID)
3 Controller 4 Outside temperature sensor
5

Safety and gateway module (SGM) up to 09/2005

Body Gateway Module (KGM) from 09/2005

6 Diagnosis lead
7 Digital Engine Electronics (DME) or Digital Diesel Electronics (DDE) 8 Auxiliary fan with output stage
9 Temperature sensor at radiator outlet 10 Instrument panel (KOMBI)
11 Heater valve in the heater circuit 12 Refrigerant pressure sensor
13 Washer jet heating, left 14 Washer jet heating, right
15 Front fuse and relay module 16 Interior temperature sensor
17 IHKA control panel/control unit 18 Heating heat exchanger sensor
19 Evaporator temperature sensor 20 Electric auxiliary coolant pump
21 Control valve in A/C compressor or magnetic coupling (depending on engine version and national version) 22 Blower motor
23 Output stage of the blower motor 24 Left fresh air recirculated air flap motor and right fresh air recirculated air flap motor
25 Ventilation flap motor 26 Footwell flap motor
27 Defroster flap motor 28 Cold-air flap motor
29 Power distribution box, rear 30 Electric auxiliary heater according to the PTC principle
31 Wave trap 32 Rear window heating
33 Wave trap 34 Relay for heated rear window
Terminal 30 Terminal 30 (voltage supply via front power distribution box) Body CAN Body CAN
LIN bus Local interconnect network bus PT-CAN Drivetrain CAN

- Input/Output IHKA

Item Explanation Item Explanation
1 Body Gateway Module (KGM) from 09/2005 2 Safety and gateway module (SGM) up to 09/2005
3 Digital Engine Electronics (DME) or Digital Diesel Electronics (DDE) 4 Central information display (CID)
5 Multi-audio system controller (M-ASK) 6 Controller
7 Electric auxiliary heater, integrated in heat exchanger for heating system 8 Fresh air / recirculated air flap motor, left
9 Fresh air / recirculated air flap motor, right 10 Ventilation flap motor, left
11 Ventilation flap motor, right 12 Cold-air flap motor
13 Footwell flap motor, left 14 Footwell flap motor, right
15 Defroster flap motor 16 Rear compartment flap motor (air stratification)
17 Blower with blower output stage 18 Relay for heated rear window
19 Left and right washer jet heating 20 Electric auxiliary coolant pump
21 Air conditioning compressor 22 Dual heating valve in the heater circuit
23 IHKA control panel/control unit with integrated interior temperature sensor 24 Front fuse and relay module
25 Evaporator temperature sensor 26 Left and right heat exchanger temperature sensors
27 Potentiometer for rear-seat area ventilation 28 Ventilation temperature sensor
29 Refrigerant pressure sensor 30 Solar sensor
31 Condensation sensor 32 Automatic air recirculation control sensor
33 Convertible top module (E64 only) 34 Outside temperature sensor
35 Instrument panel (KOMBI)    
Body CAN Body CAN LIN bus Local interconnect network bus
PT-CAN Drivetrain CAN    

- System wiring diagram integrated automatic heating and air-conditioning system in High version

Item Explanation Item Explanation
1 Multi-audio system controller (M-ASK) 2 Central information display (CID)
3 Controller 4 Outside temperature sensor
5

Safety and gateway module (SGM) up to 09/2005

Body Gateway Module (KGM) from 09/2005

6 Diagnosis lead
7 Digital Engine Electronics (DME) or Digital Diesel Electronics (DDE) 8 Auxiliary fan with output stage
9 Temperature sensor at radiator outlet 10 Convertible top module (CVM, only E64)
11 Instrument panel (KOMBI) 12 Dual heating valve in the heater circuit
13 Automatic air recirculation control sensor 14 Solar sensor
15 Refrigerant pressure sensor 16 Washer jet heating, left
17 Washer jet heating, right 18 Front fuse and relay module
19 Interior temperature sensor 20 IHKA control panel/control unit
21 Left and right heat exchanger temperature sensors 22 Evaporator temperature sensor
23 Ventilation temperature sensor 24 Potentiometer for rear-seat area ventilation
25 Condensation sensor 26 Electric auxiliary coolant pump
27 Control valve in A/C compressor or magnetic coupling (depending on engine version and national version) 28 Blower motor
29 Output stage of the blower motor 30 Left fresh air recirculated air flap motor and right fresh air recirculated air flap motor
31 Left ventilation flap motor and right ventilation flap motor 32 Left footwell flap motor and right footwell flap motor
33 Defroster flap motor 34 Cold-air flap motor
35 Rear compartment flap motor (air stratification) 36 Power distribution box, rear
37 Electric auxiliary heater according to the PTC principle 38 Wave trap
39 Rear window heating 40 Wave trap
41 Relay for heated rear window    
Terminal 30 Terminal 30 (voltage supply via front power distribution box)    
Body CAN Body CAN LIN bus Local interconnect network bus
PT-CAN Drivetrain CAN    

- Input/Output electric auxiliary heater (only diesel engine)

Item Explanation Item Explanation
1 Body Gateway Module (KGM) from 09/2005 2 Safety and gateway module (SGM) up to 09/2005
3 Digital diesel electronics (DDE) 4 Controller of electric auxiliary heater on heat exchanger for heating system with temperature sensor for the protection from thermal overload
5 Heating register in the heat exchanger for heating system 6 Instrument cluster (KOMBI) with outside temperature sensor
7 IHKA control panel/control unit 8 Power distribution box, rear
Body CAN Body CAN LIN bus Local interconnect network bus
PT-CAN Drivetrain CAN    

- System wiring diagram of electric auxiliary heater (only diesel engine)

Item Explanation Item Explanation
1

Safety and gateway module (SGM) up to 09/2005

Body Gateway Module (KGM) from 09/2005

2 Digital diesel electronics (DDE)
3 Alternator 4 Power distribution box, rear
5 Controller of electric auxiliary heater on with temperature sensor for the protection from thermal overload and heating chain 6 Outside temperature sensor
7 Instrument panel (KOMBI) 8 IHKA control panel/control unit
Terminal 30 Terminal 30 (voltage supply) BSD Bit-serial data interface
Body CAN Body CAN LIN bus Local interconnect network bus
PT-CAN Drivetrain CAN PWM Pulse-width modulated signal for output limit of the electric auxiliary heater

- Input/Output auxiliary heater

Item Explanation Item Explanation
1 Body Gateway Module (KGM) from 09/2005 2 Safety and gateway module (SGM) up to 09/2005
3 Central information display (CID) 4 Multi-audio system controller (M-ASK)
5 Controller 6 Changeover valve
7 Electric fuel pump for the auxiliary heater 8 Glow element
9 Auxiliary coolant pump for the auxiliary heater 10 Combustion air blower
11 Temperature sensor in auxiliary heater circuit 12 Temperature sensor for protection from overheating
13 Independent heater control unit 14 Front fuse and relay module
15 IHKA control panel/control unit 16 Car Access System (CAS)
17 Remote control receiver 18 Telestart transmitter
19 Aerial 20 Outside temperature sensor
21 Instrument panel (KOMBI)    
Terminal 30 Terminal 30 (voltage supply) Body CAN Body CAN

- System wiring diagram for auxiliary heater

Item Explanation Item Explanation
1 Multi-audio system controller (M-ASK) 2 Central information display (CID)
3 Controller 4 Outside temperature sensor
5

Safety and gateway module (SGM) up to 09/2005

Body Gateway Module (KGM) from 2005

6 Diagnosis lead
7 Instrument panel (KOMBI) 8 Front fuse and relay module
9 Telestart transmitter 10 Aerial
11 Remote control receiver 12 Car Access System (CAS)
13 IHKA control panel/control unit 14 Changeover valve
15 Auxiliary coolant pump for the auxiliary heater 16 Independent heater control unit
17 Temperature sensor in heater circuit for stationary heating 18 Temperature sensor for overheating
19 Glow element 20 Combustion air blower
21 Electric fuel pump for the auxiliary heater    
Terminal 30 Terminal 30 (voltage supply) Body CAN Body CAN

- Heater circuit for engine M54B22/B30 (integrated automatic heating and air-conditioning system in basic version)

Item Explanation Item Explanation
1 Coolant pump 2 Engine
3 Return line from heat exchanger for heating system 4 Heat exchanger for heating system
5 Heater feed line 6 Electric auxiliary coolant pump
7 Engine compartment 8 Heater feed line
9 Water valve 10 Thermostat
11 Radiator    
The arrow shows the direction of travel.

- Heater circuit for engine M54B22/B30 with auxiliary heater (integrated automatic heating and air-conditioning system in basic version)

Item Explanation Item Explanation
1 Coolant pump 2 Engine
3 Return line from heat exchanger for heating system 4 Heat exchanger for heating system
5 Heater feed line 6 Return line in stationary heating operation
7 Outlet from auxiliary heater 8 Auxiliary heater with electrical auxiliary coolant pump
9 Inlet in auxiliary heater 10 Changeover valve
11 Electric auxiliary coolant pump 12 Engine compartment
13 Heater feed line 14 Water valve
15 Thermostat 16 Radiator
The arrow shows the direction of travel.

- Engine heater circuit M54B22/B30 (integrated automatic heating and air-conditioning system in High version)

Item Explanation Item Explanation
1 Coolant pump 2 Engine
3 Return line from heat exchanger for heating system 4 Heat exchanger for heating system
5 Left heater feed line 6 Right heater feed line
7 Engine compartment 8 Electric auxiliary coolant pump
9 Dual heating valve 10 Heater feed line
11 Thermostat 12 Radiator
The arrow shows the direction of travel.

- Engine heater circuit M54B22/B30 with auxiliary heater (integrated automatic heating and air-conditioning system in High version)

Item Explanation Item Explanation
1 Coolant pump 2 Engine
3 Return line from heat exchanger for heating system 4 Heat exchanger for heating system
5 Left heater feed line 6 Right heater feed line
7 Return line in stationary heating operation 8 Engine compartment
9 Outlet from auxiliary heater 10 Auxiliary heater with electrical auxiliary coolant pump
11 Inlet in auxiliary heater 12 Changeover valve
13 Electric auxiliary coolant pump 14 Dual heating valve
15 Heater feed line 16 Thermostat
17 Radiator    
The arrow shows the direction of travel.

- Engine heater circuit M57D30TU (integrated automatic heating and air-conditioning system in basic version)

Item Explanation Item Explanation
1 Thermostat 2 Engine
3 Return line from heat exchanger for heating system 4 Heat exchanger for heating system with integrated, electric auxiliary heater
5 Heater feed line 6 Engine compartment
7 Electric auxiliary coolant pump 8 Water valve
9 Heater feed line 10 Coolant pump
11 Radiator    
The arrow shows the direction of travel.

- Engine heater circuit M57D30TU with auxiliary heater (integrated automatic heating and air-conditioning system in basic version)

Item Explanation Item Explanation
1 Thermostat 2 Engine
3 Return line from heat exchanger for heating system 4 Heat exchanger for heating system with integrated, electric auxiliary heater
5 Heater feed line 6 Return line in stationary heating operation
7 Outlet from auxiliary heater 8 Auxiliary heater with electrical auxiliary coolant pump
9 Inlet in auxiliary heater 10 Changeover valve
11 Heater feed line 12 Engine compartment
13 Water valve 14 Coolant pump
15 Radiator    
The arrow shows the direction of travel.

- Heater circuit for engine M57D30TU (integrated automatic heating and air-conditioning system in High version)

Item Explanation Item Explanation
1 Thermostat 2 Engine
3 Return line from heat exchanger for heating system 4 Heat exchanger for heating system with integrated, electric auxiliary heater
5 Left heater feed line 6 Right heater feed line
7 Engine compartment 8 Electric auxiliary coolant pump
9 Dual heating valve 10 Heater feed line
11 Coolant pump 12 Radiator
The arrow shows the direction of travel.

- Heater circuit for engine M57D30TU with auxiliary heater (integrated automatic heating and air-conditioning system in High version)

Item Explanation Item Explanation
1 Thermostat 2 Engine
3 Return line from heat exchanger for heating system 4 Heat exchanger for heating system with integrated, electric auxiliary heater
5 Left heater feed line 6 Right heater feed line
7 Return line in stationary heating operation 8 Engine compartment
9 Outlet from auxiliary heater 10 Auxiliary heater with electrical auxiliary coolant pump
11 Inlet in auxiliary heater 12 Changeover valve
13 Heater feed line 14 Dual heating valve
15 Coolant pump 16 Radiator
The arrow shows the direction of travel.

- Overview of the components of the air conditioning

For a better overview, the flap motors are shown without flaps.
Item Explanation Item Explanation
1 Heating heat exchanger sensor, right (only integrated automatic heating and air-conditioning system in High version) 2 Right footwell flap motor (only integrated automatic heating and air-conditioning system in High version)
3 Fresh air / recirculated air flap motor, right 4 Ventilation flap motor, right
5 Stratification flap motor 6 Blower
7 Rear compartment flap motor (only integrated automatic heating and air-conditioning system in High version) 8 Left ventilation flap motor (only integrated automatic heating and air-conditioning system in High version)
9 Evaporator 10 Fresh air / recirculated air flap motor, left
11 Evaporator temperature sensor 12 Defroster flap motor
13 Footwell flap motor, left 14 Heating heat exchanger sensor, left
15 Heat exchanger for heating system    
The arrow shows the direction of travel.
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