Range Rover 2. Electrical Manual - part 67

MEMORY SEATS

M4

13

CIRCUIT DIAGRAM

6

C562

UG

UP

C626

18

Z238
Body Electrical
Control Module
(BECM)

9

GN

8

P

0

1

1

R

0

0

1

N

1

0

1

D

1

0

0

3

0

0

0

2

0

1

0

1

1

1

0

Z*

1

1

1

X

Y

Z

0

1

2

C564

X157
Reverse Switch

S551

See Ground Dis-
tribution

B

E529

GN

C564

1

3

C660
C560

Manual Trans-
mission

Automatic
Transmission

UB

10

C659

S610

C559

Automatic Gear-
box

[1]

0

[2]

0

[3]

0

7

C660
C560

6

C562

3

2

1

S609

S608

UB

X

Y

Z

S607

See Ground Dis-
tribution

BG

E621

5

C560
C660

B

X294
Gear Box Posi-
tion Switch

[1]

X Switch

[2]

Y Switch

[3]

Z Switch

Automatic
Transmission

Manual Trans-
mission

E574

P

Petrol
Diesel

1 =

0 =

* =

Switch Open

Switch Closed

Fault

HEATED SEATS

M6

CIRCUIT OPERATION

1

CIRCUIT OPERATION

Driver and passenger seat heaters are PTC
regulated. Heated seat activation requests and
timing functions are generated by the Hevac ECU
while the Ignition Switch (X274) is in position II. The
BeCM (Z238) provides power switching only for this
function. In the case of both rear windows and the
sunroof being operated at the same time or an
uninitialised rear window or sunroof function being
operated, the seat heaters will be inhibited to
maintain current demand within a safe operating
area.

The signals are sent from the HEVAC ECU to the
BeCM (Z238) and are active low. Therefore the lines
are normally held at 12V.

HEATED SEATS

M6

2

CIRCUIT DIAGRAM

E908

E909

S901

With Power
Seats

See Ground Dis-
tribution

Without Power
Seats

B117
Left Heated Seat

2

C904

1

C904

B131
Right Heated
Seat

2

C906

1

C906

B117
Left Heated Seat

3

C903

1

C903

B131
Right Heated
Seat

3

C905

1

C905

NR

NG

B

NU

NB

B

2

1

C912

BP

15

Z253
Heating Ventila-
tion and Air
Conditioning
Control Unit
(HEVAC)

Z238
Body Electrical
Control Module
(BECM)

0

1

0

1

20

30

F 2

30 A

BR

6

C255

19

C246B

12

C246A

Without Air Condition-
ing

With Air Conditioning

11

MEMORY MIRRORS

M7

CIRCUIT OPERATION

1

CIRCUIT OPERATION

General

The following combinations of seat and mirror
adjustment method will be available:

11. Memory driver’s seat, memory passenger seat

and memory mirrors.

12. Memory driver’s seat, electric passenger’s seat

and memory mirrors.

13. Mechanically adjusted driver’s and passenger’s

seats, electric mirrors.

The memory mirror system will store the horizontal
and vertical position of each mirror. Storage and
recall functions will be controlled by the driver’s
memory seat control switches, each seat memory
position having a mirror memory position associated
with it.

Memory mirror enable and one touch enable will
occur under the same conditions as memory seat
enable and one touch enable .

Reverse dip position

Reverse mirror dipping will be enabled when the
presence of a driver’s side seat memory outstation is
detected.

If a driver’s seat memory store sequence is executed
whilst auxiliary is selected and the transmission is in
reverse, then the stored mirror position will be the
position that the mirrors will dip to when reverse gear
is next selected and that memory number is
currently recalled. To protect against accidental
setting, the mirror position will only be stored if it has
been altered since reverse was selected and a
message on the instrument pack will inform the
driver that the mirror position has been stored.

The function may be toggled on and off by holding
the memory store button for at least 2 seconds whilst
in reverse gear with auxiliary or ignition selected.

Successful toggling of the function will be
accompanied by the message “Mirror dip on”/“Mirror
dip off” as described in the message parameter
table.

Successful toggling of the function will result in the
mirrors moving immediately to the dipped/undipped
position as appropriate.

Storing a new reverse dip position will automatically
toggle the function on.

Vehicles fitted with automatic transmission will have
a 0.5 sec delay following the selection of reverse
gear prior to the mirror dip position being recalled.