Conversion from IHKR (integrated heater and air conditioner control) to IHKA (automatic heating and air conditioning) BMW 3 Series (E46)

EBA – 01 29 0 029 506
BMW Installation Instructions
Conversion from IHKR (integrated heater and air conditioner control) to IHKA (automatic heating and air conditioning) BMW 3 Series (E46)

Technical knowledge is required.

Only for use within the BMW trading organisation.

Installation time approx. 6 hours, which can vary according to the condition and fittings of the vehicle.

Conversion/Installation Kit no. 64 50 0 029 507

Contents

Chapter

Important notes
1. Preparatory work
2. Connection overview IHKA and AUC
(automatic recirculating air control) wiring harness
3. Convert heater/air-conditioner
4. Install and connect IHKA wiring harness
5. Install and connect AUC sensor
6. Finalising operations
7. Circuit diagram IHKA wiring harness
8. Circuit diagram AUC wiring harness

Important notes

Safety instructions

The current accident prevention regulations should be observed.

When dealing with component parts of the airbag system safety instructions should be complied with.

For more detailed information please refer to the TIS under RA no. 32 34 … . Non-observance of the safety instructions can lead to erroneous activation and injury from the airbag system.”

Assembly instructions

When installing cables, do not kink or damage them otherwise faults may occur which can only be localised and remedied later by extensive reworking. Costs arising in this way will not be reimbursed by BMW.

The procedures, Convert heater/air-conditioner and Install IHKA wiring harness, are best shown on a dismantled heater/air-conditioner.

Should specified pins be assigned, bridges, double crimping or parallel connections will have to be made. All operations are shown on a left-hand drive vehicle.

Target Group

Target group for these installation instructions is technical personnel who have been trained on BMW vehicles and who have specialised knowledge of vehicle electrical systems.

Tasks:

Carry out all maintenance, repair and installation work on BMW vehicles on own account. All operations should be carried out with the aid of the current BMW

– repair instructions – circuit diagrams

in a rational sequence with the prescribed tools (special tools) whilst observing the current safety regulations.

Required tools and auxiliary materials
MoDiC or DIS
Set of flat-tip screwdrivers
Set of Phillips screwdrivers
Set of Torx screwdrivers
Set of 1/2 inch socket wrenches
Set of fork wrenches/ring wrenches
Side-cutting pliers
1/2 inch torque spanner
Hand lamp

1. Preliminary work

TIS AW no.
Carry out short test
Disconnect negative terminal of the battery 12 00 …
The following components should be disassembled first:
Trim panel for instrument panel 51 45 030
Cross-bracing
Battery (only vehicles with 4-cylinder petrol engine)

2. Connection overview IHKA and AUC wiring harness

Conversion from IHKR (integrated heater and air conditioner control) to IHKA (automatic heating and air conditioning) BMW 3 Series (E46)

Item Designation Signal Cable colour/ cross-section Anschlussort im Fahrzeug Code desig. plug-in place
A IHKA wiring harness
A1 Connector, 6-pole, black At IHKA operating unit X18341
A2 Connector, 3-pole, black At IHKA operating unit X18348
A3 Connector, 2-pole, black At heater/air-conditioner X18722
A4 Connector, 2-pole, black With butt-joint connector at blower cable X816
A5 Connector, 5-pole, black At the blower output stage X671
A6 Connector, 2-pole, black At temperature sensor of evaporator X771
A7 Connector, 2-pole, black At temperature sensor of heat exchanger X772
A8 Connector, 3-pole, black At actuator, footwell X18788
A9 Connector, 3-pole, black At actuator, defrosting X664
A10 Connector, 3-pole, black At actuator, air distribution X18347
A11 Connector, 3-pole, black At actuator, fresh/recirculating air left X18346
A12 Connector, 3-pole, black At actuator, fresh/recirculating air right X18345
B AUC wiring harness
B1 Connector, 4-pole, black At AUC sensor X3211
B2 Socket contact BL Ø 0,5 mm2 At IHKAoperating unit X610, Pin 18
B3 Socket contact BR/BL Ø 0,5 mm2 At IHKAoperating unit X610, Pin 11
B4 Socket contact GE Ø 0,5 mm2 At IHKAoperating unit X610, Pin 16
B5 Socket contact BR/GE Ø 0,5 mm2 At IHKAoperating unit X610, Pin 15

3. Convert heater/air-conditioner

Der The procedure, Convert heater/air-conditioner, is best shown on a dismantled heater/ air-conditioner.

The connection to the blower motor, connector X816, remains connected for the time being.”

Disconnect the existing IHKR wiring harness from the individual components and lay it aside.

[1] Unclip deflection lever (1) from mechanical flap actuator (2).

Conversion from IHKR (integrated heater and air conditioner control) to IHKA (automatic heating and air conditioning) BMW 3 Series (E46)

Screw out Torx screw (1) and remove cover plate (2).

Conversion from IHKR (integrated heater and air conditioner control) to IHKA (automatic heating and air conditioning) BMW 3 Series (E46)

Screw out Torx screws (1) and remove complete flap mechanism (2) from the heater/air-conditioner (3).

Conversion from IHKR (integrated heater and air conditioner control) to IHKA (automatic heating and air conditioning) BMW 3 Series (E46)

Insert supplied new flap spindle (1) in the heater/ air-conditioner (2) until it engages.

Conversion from IHKR (integrated heater and air conditioner control) to IHKA (automatic heating and air conditioning) BMW 3 Series (E46)

Make sure the teeth are in synchronisation.”

Insert supplied gear shafts (1) in the heater/airconditioner (2) until they engage.

Conversion from IHKR (integrated heater and air conditioner control) to IHKA (automatic heating and air conditioning) BMW 3 Series (E46)

Screw base plate (1) with supplied Torx screws to the heater/air-conditioner (2).

Conversion from IHKR (integrated heater and air conditioner control) to IHKA (automatic heating and air conditioning) BMW 3 Series (E46)

Clip actuator (1) into base plate (2).

Conversion from IHKR (integrated heater and air conditioner control) to IHKA (automatic heating and air conditioning) BMW 3 Series (E46)

Clip actuators (1 and 2) as shown into base plate (3).

Die The electrical connections of the actuators (1 and 2) must point towards each other as shown.”

Conversion from IHKR (integrated heater and air conditioner control) to IHKA (automatic heating and air conditioning) BMW 3 Series (E46)

Clip deflection lever (1) into actuator (2).

Conversion from IHKR (integrated heater and air conditioner control) to IHKA (automatic heating and air conditioning) BMW 3 Series (E46)

4. Install and connect IHKA wiring harness

The procedure, Install IHKA wiring harness, is best shown on a disassembled heater/air-conditioner.”

Conversion from IHKR (integrated heater and air conditioner control) to IHKA (automatic heating and air conditioning) BMW 3 Series (E46)

Connect IHKR wiring harness as follows:

Item Code designation Connection point
A3 X18722 Clip into heater/air-conditioner
A5 X671 At the blower output stage
A7 X722 At the temperature sensor, heat exchanger
A8 X18788 At the actuator, footwell
A9 X664 At the actuator, defrosting
A10 X18347 At the actuator, air distribution
A12 X18345 At the actuator, fresh/recirculating air, right

Conversion from IHKR (integrated heater and air conditioner control) to IHKA (automatic heating and air conditioning) BMW 3 Series (E46)

[2] Install branch cables A6 and A11 along the IHKR wiring harness to the left side of the heater/airconditioner and connect as follows:

  • A6, connector X711, to temperature sensor, evaporator (1).
  • A11, connector X18346, to actuator, fresh/recirculating air left (2).

Take care to see that the branch cables A6 and A11 are not lying against the adjustment lever (3).”

Conversion from IHKR (integrated heater and air conditioner control) to IHKA (automatic heating and air conditioning) BMW 3 Series (E46)

At a suitable place, cut the two cables to connector X816 (cable colours BR and GR/BR) coming from the IHKA wiring harness (1) and the IHKR wiring harness (2) and insulate the cable ends.

Conversion from IHKR (integrated heater and air conditioner control) to IHKA (automatic heating and air conditioning) BMW 3 Series (E46)

Connect the open cable ends (cable colours BR and GR/BR) from the IHKA wiring harness (1) and the IHKR wiring harness (2) with the supplied butt-joint connectors (3) and shrinkage tubing.See TIS RA no. 61 13 …”

5. Install and connect AUC sensor

Only vehicles with 4 or 6-cylinder petrol engine

Conversion from IHKR (integrated heater and air conditioner control) to IHKA (automatic heating and air conditioning) BMW 3 Series (E46)

Clip AUC sensor (1) into the radiator casing (2) and connect connector X3211.

Install AUC wiring harness (3) in the engine compartment, right, to the end panel.

Only vehicles with 4 or 6-cylinder diesel engine

Conversion from IHKR (integrated heater and air conditioner control) to IHKA (automatic heating and air conditioning) BMW 3 Series (E46)

Clip AUC sensor (1) into the radiator casing (2) and connect connector X3211.

Install AUC wiring harness (3) in the engine compartment, right, to the end panel.

All vehicles

Conversion from IHKR (integrated heater and air conditioner control) to IHKA (automatic heating and air conditioning) BMW 3 Series (E46)

Install AUC wiring harness (1) through the rubber grommet (2) into the interior.

Conversion from IHKR (integrated heater and air conditioner control) to IHKA (automatic heating and air conditioning) BMW 3 Series (E46)

Install branch cables B2B5 along the heater/airconditioner (1) to the 18-pole white connector X610 and pin in as follows:

BL PIN 18
BR/BL PIN 11
GE PIN 16
BR/GE PIN 15

6. Finalising operations

  • Reassemble vehicle in the reverse order of disassembly using the supplied IHKA operating unit.
  • Connect battery.
  • Code the conversion via the path “Retrofit IHKA”.
  • Carry out short test.
  • Carry out function test of the IHKA.

7. Circuit diagram IHKA wiring harness

Conversion from IHKR (integrated heater and air conditioner control) to IHKA (automatic heating and air conditioning) BMW 3 Series (E46)

Key

A11 IHKA operating unit
B11 Temperature sensor, heat exchanger
B14 Temperature sensor, evaporator
M30 Blower motor
M35 Actuator, defrosting
M38 Actuator, footwell
M18345 Actuator, fresh/recirculating air left
M18346 Actuator, fresh/recirculating air right
M18347 Actuator, air distribution
N2 Blower output stage
X664 Actuator, defrosting
X671 Blower output stage
X771 Temperature sensor, evaporator
X772 Temperature sensor, heat exchanger
X816 Blower motor
X5992 Soldered connector 2
X5993 Soldered connector 3
X5994 Soldered connector 4
X18341 IHKA operating unit
X18345 Actuator, fresh/recirculating air left
X18346 Actuator, fresh/recirculating air right
X18347 Actuator, air distribution
X18348 IHKS operating unit
X18722 Blower
X18788 Actuator, footwell

Cable colours
RT red
SW black
GE yellow
BL blue
GN green
BR brown
GR grey
WS white

8. Circuit diagram AUC wiring harness

Conversion from IHKR (integrated heater and air conditioner control) to IHKA (automatic heating and air conditioning) BMW 3 Series (E46)

Key

A11 IHKR operating unit
B414 AUC sensor
X610 IHKR operating unit
X3211 AUC sensor

Cable colours
BR brown
GE yellow
BL blue

banner