Range Rover 2. Electrical Manual - part 216

HEATED SEATS

M6

CIRCUIT OPERATION

1

REV: 11/2000

CIRCUIT OPERATION

Driver and passenger seat heaters are temperature
regulated by a thermal switch located in each seat.
The seat heaters will only operate while the engine is
running and, once selected, remain energised until
selected off or until the ignition is turned off.

Seat heater activation is initiated by pressing the
appropriate switch on the HEVAC ECU. Provided the
engine is running, the HEVAC ECU transfers the
request to the BeCM by switching the applicable
output from Vbatt to ground for the duration that the
switch is pressed. On receipt of the seat heater
request, the BeCM switches the appropriate seat
heater output from ground to Vbatt. To prevent
current overload, the BeCM inhibits the seat heater
output if both rear windows and the sunroof are
operated together, or if an uninitialised rear window
or sunroof are operated.

The seat heater power output from the BeCM
passes through the thermal switch and the heating
elements, in the seat cushion and seat squab, to
ground. The temperature of the heating elements is
regulated by the opening and closing of the thermal
switch.

HEATED SEATS

M6

2

CIRCUIT DIAGRAM

E1412

E1413

S901

With Power
Seats

See Ground
Distribution

Without Power
Seats

B117
Left Heated Seat

2

C1402

1

C1402

B131
Right Heated
Seat

2

C1404

1

C1404

B117
Left Heated Seat

3

C1401

1

C1401

B131
Right Heated
Seat

3

C1403

1

C1403

NR

NG

B

NU

NB

B

2

1

C0877

BP

15

Z253
Heating
Ventilation and
Air Conditioning
Control Unit
(HEVAC)

Z238
Body Electrical
Control Module
(BECM)

0

1

0

1

20

30

F 2

30 A

BR

6

C1279

19

C0793

12

C1576

Without Air
Conditioning

With Air Conditioning

11

MEMORY MIRRORS

M7

CIRCUIT OPERATION

1

REV: 08/99

CIRCUIT OPERATION

General

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

3. Memory driver’s seat, memory passenger seat

and memory mirrors.

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

and memory mirrors.

5. 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.