Land Rover Range Rover Electrical Library Lm 2nd Edition Rover Manual

DESCRIPTION AND OPERATION
4.16RANGE ROVER
Anti-Trap
The anti-trap system consists of an anti-trap seal, which runs along the door glass frame. 
The seal contains two elements, with a combined resistance of 1.2 k. This resistance is 
constantly monitored by the BCU. If the window meets an obstacle, it pushes it against the 
anti-trap seal. This shorts the two elements together, reducing the seals resistance to 
approximately 500 . When the BCU detects this drop in resistance, it reverses the feed to 
the...

DESCRIPTION AND OPERATION
RANGE ROVER 4.17
SUNROOF
DESCRIPTION
General
Operation of the sunroof is controlled via the three position switch located on the front of the 
headlining. Moving the switch rearwards opens the sunroof. Similarly, moving the switch 
forward closes the sunroof. A single press in the centre of the switch opens or closes the 
sunroof from the tilt position.
All switch inputs are registered by the sunroof ECU, which is located behind the front of the 
headlining, adjacent the sunroof...

DESCRIPTION AND OPERATION
4.18RANGE ROVER
Sunroof ECU
The sunroof ECU (C0784) provides a feed to the sunroof switch (C0363) on a YS wire. If the 
switch is moved to the Open position, a feed is returned to the ECU (C0784) on a YG wire. 
The ECU will now power the sunroof motor to open the sunroof. By measuring the voltage 
pulses returned from two Hall effect sensors located within the sunroof mechanism, the ECU 
can determine when the sunroof has reached the end of its travel and cut the voltage supply...

DESCRIPTION AND OPERATION
RANGE ROVER 4.19
DOOR MIRRORS
DESCRIPTION
General
The door mirrors operate when the ignition switch is turned to the auxiliary position. 
Operation of the door mirrors is carried out by door modules located in each front door, in 
conjunction with the Body Control Unit (BCU).
The BCU can store up to three mirror positions in its memory, which it transmits to the door 
modules via the peripheral (P) bus. The BCU also initiates mirror heating if the outside 
temperature is between...

DESCRIPTION AND OPERATION
4.20RANGE ROVER
Drivers Door Mirror
Horizontal Adjustment
When RH adjustment of the drivers door mirror is required, the drivers door module (C2271) 
provides a feed to the horizontal motor on a G wire. Current flows across the motor and back 
to the drivers door module (C2271) on an R wire. If LH adjustment of the drivers door mirror 
is required, the feed to the horizontal motor is reversed. The motor is provided a feed on an 
R wire, with an earth path provided by the drivers...

DESCRIPTION AND OPERATION
RANGE ROVER 4.21
Mirror Fold
A non-latching mirror folding switch is located on the drivers door module. When the switch 
is pressed a first time, the drivers door module (C2271) provides a feed to the mirror fold 
motor on an RU wire. Current flows across the motor and back to the drivers door module 
(C2271) on a GN wire. The drivers door mirror now moves to the folded position. If the switch 
is pressed a second time, the feed to the fold motor is reversed. The motor is...

DESCRIPTION AND OPERATION
4.22RANGE ROVER
Mirror Memory
The door mirror memory function works in conjunction with the seat and steering wheel 
memory functions. The BCU (C0660) receives a memory request from the seat memory 
ECU (C0862) via the K-bus on a WRY wire. The BCU (C0660) relays this message to the 
passenger door module (C2057) via the P-bus on a UR wire.
When the passenger door module receives a memory request it moves the mirrors as 
described above. Two potentiometers are fitted within the...

DESCRIPTION AND OPERATION
RANGE ROVER 4.23
INTERIOR MIRROR
DESCRIPTION
General
New Range Rover is fitted with an automatically dimming electrochromic interior mirror. A 
light sensor, incorporated into the interior mirror, dims the mirror if it detects a light source 
behind the vehicle. The interior mirror also provides an output to both door mirrors, allowing 
dimming of all three rear view mirrors.
OPERATION
Power Distribution
Feed from the positive battery terminal (C0192) is supplied to fuse 43 and...

DESCRIPTION AND OPERATION
4.24RANGE ROVER
Reverse Gear Inhibit
The automatic dimming function of the electrochromic interior mirror is inhibited if reverse 
gear is selected. The Light Check Module (LCM) (C2040) provides a reverse gear selected 
signal to the interior mirror (C0698) on a UY wire.
Anti-theft Alarm LED
The anti-theft alarm LED is located on the interior mirror (C0698) and receives a signal from 
the BCU (C0661) on an SBY wire. For more information on anti-theft alarm operation, refer 
to...

DESCRIPTION AND OPERATION
RANGE ROVER 4.25
FRONT SEATS
DESCRIPTION
General
Two levels of electric front seats are fitted to Range Rover, with a memory function available 
as an option. The memory function is capable of storing up to three seat positions. The 
standard electric front seats have four motors to control the following:

Horizontal movement

Seat height

Seat angle

Seat backrest recline.
The higher specification Contour seat has two additional motors which control the following:

Headrest...