Seat heating system, front for the BMW 3 Series Coupé, touring, Saloon and compact (E46/2/3/4/5) LHD and RHD models.

EBA – 01 29 0 026 897
BMW Installation Instructions

Seat heating system, front for the BMW 3 Series Coupé, touring, Saloon and compact (E46/2/3/4/5) LHD and RHD models.

The installation time is approx. 3.5 hours, but this may vary depending on the condition of the car and the equipment in it.

Retrofit/Installation kit No.

  • 61 11 0 026 888
  • 61 11 0 026 890
  • 61 11 0 026 895
  • 61 11 0 026 896

Contents

Section

  1. Preparations
  2. Installation and wiring diagram
  3. Connection diagram for the seat heating system wiring harnesses
  4. To prepare the seats
  5. To install the wiring harnesses
  6. Seat heating system BMW E46 circuit diagram

Important information

The specified installation time only refers to the installation and connection work for the wiring harnesses.The installation of the heating elements is identical to the work described in ”To replace the seat cover for the left or right front seat”.The work involved in this procedure must be charged separately and is to be taken from the customer service data.

Ordering instructions

For cars built before 09/99 without a switch centre the required module holder must be ordered separately (see EPC for order number). Ensure that you order the correct version.

Target group

The target group for these installation instructions are staff who have been trained on BMW cars with specialist knowledge of body electrical systems.

Work:

All servicing, repair and installation work on BMW cars is completed on your own responsibility.

All the work is to be completed with the help of current BMW

  • Repair manuals,
  • Circuit diagrams,

in a rational order using the specified tools (special tools) and in compliance with current health and safety regulations.

Installation note

All the work is shown on a LHD model. Proceed in the same way on the opposite side on RHD cars.

This retrofit kit is not coding-relevant.

Use the proper torque values for screw connections.The required torque values are shown in the Parts Information System (TIS).

Tools and equipment required

MoDiC or DIS
Set of straight slot screwdrivers
Set of 1/2” sockets
Set of 1/2” Torx sockets
Set of Philips screwdrivers
Set of open-ended/ring spanners
Torch
Angle cutter
Insulating tape
Special tool 52 0 050

1. Preparations

Refer to the safety regulations for handling airbag modules and pyrotechnic belt tensioners, see HG-72.

Incorrect handling may result in the pyrotechnic belt tensioner or side airbag being deployed, which may cause injury.

Switch off the ignition.

The seats are a major part of the life-saving BMW restraint system. All repair and setting work on the seats should therefore be conducted with extreme care and attention.

The specified TIS AW numbers refer to the standard, manual front seats. Complete the appropriate procedures if the car has sports or electrical front seats.

TIS AW-No.
Conduct a brief test
Disconnect the negative pole of the battery 12 00 …
The following components must be removed initially:
Support for the oddments box in the centre console 51 16…
Pedal trim 51 45 185
Glove compartment 51 16 360
Internal front door sill strips on both sides 51 47 000
Both front seats 52 13 000
Replace the seat covers for both front seats 52 13 400
Replace the backrest cover for both front seats 51 13 405

2. Installation and wiring diagram

Seat heating system, front for the BMW 3 Series Coupé, touring, Saloon and compact (E46/2/3/4/5) LHD and RHD models.

Legend

  1. Switch centre
  2. Power supply wiring harness
  3. Fuse holder / K bus joint connector
  4. Seat heating system, right, wiring harness
  5. Earth connection point
  6. Seat heating system, right
  7. Seat heating system, left
  8. AEarth connection point
  9. Seat heating system, left, wiring harness

3. Connection diagram for the seat heating system wiring harnesses

Seat heating system, front for the BMW 3 Series Coupé, touring, Saloon and compact (E46/2/3/4/5) LHD and RHD models.

Item Description Signal Cable colour/ Cross-section Connection site in the car Abbreviation/Slot
1 Wiring harness left seat ––– ––– ––– –––
2 Wiring harness right seat ––– ––– ––– –––
3 Power supply wiring harness ––– ––– ––– –––
A1 Blade terminal contact Seat heating

ON

GN/VI, 2.5 mm2 Under the driver’s seat Plug X275, PIN 25
A2 Blade terminal contact Earth BR, 2.5 mm2 Under the driver’s seat Plug X275, PIN 24
A3 Socket contact Temperature WT/GN, 0.35 mm2 Under the driver’s seat Plug X275, PIN 23
A4 Blade terminal contact Earth BR, 2.5 mm2 On the left side skirt Joint connector X173
A1.1 Blade terminal contact Seat heating

ON

GN/VI, 2.5 mm2 On the switch centre X1869, PIN 13
A3.1 Socket contact Temperature WS/GN, 0.35 mm2 On the switch centre X1869, PIN 21
B1 Blade terminal contact Seat heating

ON

GN/YE, 2.5 mm2 Under the passenger seat X279, PIN 25
B2 Blade terminal contact Earth BR, 2.5 mm2 Under the passenger seat X279, PIN 24
B3 Socket contact Temperature WT/BL, 0.35 mm2 Under the passenger seat X279, PIN 23
B4 Blade terminal contact Earth BR, 2.5 mm2 On the right side skirt Joint connector X490
B1.1 Blade terminal contact Seat heating

ON

GN/YE, 2.5 mm2 On the switch centre X1869, PIN 1
B3.1 Socket contact Temperature WT/BL, 0.35 mm2 On the switch centre X1869, PIN 20
C Blade terminal contact K-bus WT/RD/YE, 0.35 mm2 On the fuse box Joint connector X10116
D Blade terminal contact Terminal 30 RD/VI, 0.75 mm2 On the fuse box Fuse holder A46, slot No. F42
E Blade terminal contact Terminal R VI/BL, 4 mm2 On the fuse box Fuse holder A47, slot No. F12

4. To prepare the seats

Seat heating system, front for the BMW 3 Series Coupé, touring, Saloon and compact (E46/2/3/4/5) LHD and RHD models.

! In no circumstances may the screw below the Torx screw for securing the backrest be undone.This will destroy the seat frame. Install the heating elements as described in the TIS.

Seat heating system, front for the BMW 3 Series Coupé, touring, Saloon and compact (E46/2/3/4/5) LHD and RHD models.

Complete the following work on both seats: Install the connection cable (1) as shown and place it in the mountings (3).

Connect the plugs (2) for the heating elements.

Seat heating system, front for the BMW 3 Series Coupé, touring, Saloon and compact (E46/2/3/4/5) LHD and RHD models.

Release the plug (1).

Insert the plug (2) for the heating elements.

Lock the plug (1) again.

5. To install the wiring harnesses

Seat heating system, front for the BMW 3 Series Coupé, touring, Saloon and compact (E46/2/3/4/5) LHD and RHD models.

Connect the seat heating system wiring harness (1) into the plugs (2) X275 or X279 as follows:

Driver’s side:

Connect branch

A1 (3), green/violet cable, to PIN chamber 25

A2 (4), brown cable, to PIN chamber 24

A3 (5), white/green cable, to PIN chamber 23.

Passenger side:

Connect branch

B1 (3), green/yellow cable, to PIN chamber 25

B2 (4), brown cable, to PIN chamber 24

B3 (5), white/blue cable, to PIN chamber 23.

Secure the seat heating system wiring harnesses (1) to the seat wiring harness (6) using insulating tape.

Seat heating system, front for the BMW 3 Series Coupé, touring, Saloon and compact (E46/2/3/4/5) LHD and RHD models.

Pull back the carpet (1) below the driver’s seat. Lay the seat heating system wiring harness (2) along the side skirt to the front and then to the centre console.

Connect branch A4 (3), brown cable, into the joint connector (4) X173.

Seat heating system, front for the BMW 3 Series Coupé, touring, Saloon and compact (E46/2/3/4/5) LHD and RHD models.

Pull back the carpet (1) below the passenger seat. Lay the seat heating system wiring harness (2) along the side skirt to the front and then to the centre console.

Connect branch B4 (3), brown cable, into the joint connector (4) X490.

Seat heating system, front for the BMW 3 Series Coupé, touring, Saloon and compact (E46/2/3/4/5) LHD and RHD models.

If the car already has a switch centre, reconnect the connections of the wiring harness in the existing plug (1) X1869.

Connect the wiring harness into the plug (1) X1869 as follows:

Connect branch

A1.1, green/violet cable, in PIN chamber 13

A1.3, white/green cable, in PIN chamber 21 B1.1, green/yellow cable, in PIN chamber 1 B1.3, white/blue cable, in PIN chamber 20.

Seat heating system, front for the BMW 3 Series Coupé, touring, Saloon and compact (E46/2/3/4/5) LHD and RHD models.

Push the switch centre (1) into the module holder (4) from the rear, lock it and secure it with the fillister head screws (2) supplied in the installation kit.

Connect the plug strips (3).

Install the module holder (4) again.

Seat heating system, front for the BMW 3 Series Coupé, touring, Saloon and compact (E46/2/3/4/5) LHD and RHD models.

If there is no switch, remove the special equipment with the caps (1) supplied.

Seat heating system, front for the BMW 3 Series Coupé, touring, Saloon and compact (E46/2/3/4/5) LHD and RHD models.

Release the fuse box A46 (3).

Undo the Torx screws (1). Release the locks in the recesses (2) with a small straight slot screwdriver. Remove the fuse box A46 (3) in the direction indicated by the arrow.

As you take out the fuse box A46 (3) the blade terminal fuses on the bottom row of slots will fall out.

Ensure that all the blade terminal fuses are reinserted in the appropriate slots.

Seat heating system, front for the BMW 3 Series Coupé, touring, Saloon and compact (E46/2/3/4/5) LHD and RHD models.

Release the plug strips on the fuse holders. Connect branch (1) D, red/violet cable, to fuse slot F42 (2).

Connect branch (3) E, violet/blue cable, to fuse slot F12 (4).

Assemble the fuse box again.

Insert a 30 A blade terminal fuse into fuse slot F42 (2).

Insert a 7.5 A blade terminal fuse into fuse slot F12 (4).

Seat heating system, front for the BMW 3 Series Coupé, touring, Saloon and compact (E46/2/3/4/5) LHD and RHD models.

Connect branch C, white/red/yellow cable, to joint connector X10116 (same colour).

Assemble the car again following the instructions for its dismantling in reverse order.

This retrofit kit is not coding-relevant.

6. Seat heating system BMW E46 circuit diagram

Seat heating system, front for the BMW 3 Series Coupé, touring, Saloon and compact (E46/2/3/4/5) LHD and RHD models.

Legend

A46 Fuse distributor
A47 Fuse distributor
A169 Switch centre
E56 Heating element in driver’s backrest
E57 Heating element in driver’s seat
E58 Heating element in passenger’s seat
E59 Heating element in passenger’s backrest
X173 Joint connector for earth connection
X275B 24-pin black plug
X275S 24-pin black plug
X279B 24-pin black plug
X279S 24-pin black plug
X490 Joint connector for earth connection
X732 2-pin black plug
X733 4-pin black plug
X740 4-pin black plug
X741 2-pin black plug
X1869 23-pin brown plug
X10015 Plug strip
X10016 Plug strip
X10116 K bus joint connector

Cable colours

GN/VI Green/violet
WS/GN White/yellow
GN/GE Green/yellow
WS/BL White/blue
BR Brown
RT/VI Red/violet
VI/BL Violet/blue
WS/RT/GE White/red/yellow

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