Legend, wiring diagram for seat heater and seat ventilation control unit

PE91.30-P-2102-60TA

Legend, wiring diagram for seat heater and seat ventilation control unit

Model 171 up to 29.2.08 with CODE (873) Seat heater, left and right front seats
with AIRSCARF and steering wheel heater,
control unit N25/7

Code

Designation

Coordinates

A0

Color code key

40L

F34

Interior fuse box

3L
23L
28L

F34f23

Fuse 23

28K

F34f24

Fuse 24

24K

F34f25

Fuse 25

1K

F34f31

Fuse 31

23K

M4/10

Left AIRSCARF fan motor

32L

M4/11

Right AIRSCARF fan motor

34L

N25/7

SH [SIH], AIRSCARF and steering wheel heater control unit

4A
12A
20A
28A
36A

N80

Steering column module

16L
20L

R13/1

Left front seat heated cushion

9L

R13/2

Left front backrest heated cushion

8L

R13/3

Right front seat heated cushion

12L

R13/4

Right front backrest heated cushion

11L

R22/5

Left AIRSCARF heating element

30L

R22/6

Right AIRSCARF heating element

29L

U1

Valid for 

16E

U12

Valid for left-hand drive vehicles

13F
16F
18D

U13

Valid for right-hand drive vehicles

13F
18E

U33

Valid for all (except )

13E

U52

Valid for 

17F

U744

Valid for steering wheel heater

13C
18C

U820

Valid for AIRSCARF

24C

U904

Wiring harness installed but nonfunctional

36C

W18

Ground (left front seat crossmember)

9E
13H
19H
30E

W19

Ground (right front seat crossmember)

3E
12E
13H
19H
29E

W29/2

Ground (right A-pillar)

17H

X4/40

Steering wheel separation point

14H
20H

X30/6

Cockpit voltage distributor (CAN) connector

6L

X55/3

Driver seat connector block

7H
30H
31H
37H

X55/4

Front passenger seat connector block

10H
29H
34H
39H

Z6/55

AIRSCARF NTC ground connector sleeve

38E

Z167/1

AIRSCARF fan connector sleeve

34E