ECU LAND ROVER DISCOVERY 2002 Workshop Manual

SEATS
76-5-24 REPAIRS
Motor - recline
$% 78.70.34
Remove
1.Remove squab cover.

+ SEATS, REPAIRS, Cover - squab -
front seat.
2.Disconnect recline motor multiplug.
3.Remove 2 bolts securing recline motor and
remove motor.
Refit
1.Position recline motor and ensure gear and
gear spigot are engaged.
2.Fit and tighten bolts securing recline motor to
frame.
3.Connect recline motor multiplug.
4.Fit squab cover.

+ SEATS, REPAIRS, Cover - squab -
front seat.
Switch - electric seats
$% 78.70.88
Remove
1.Release switch from centre console.
2.Pull the connector retaining bar outwards to the
limit of its travel and carefully disconnect the
connector from the switch.
Refit
1.Connect multiplug to rear of switch and slide
the retaining bar fully home.
2.Fit switch to centre console.

SEATS
REPAIRS 76-5-25
Cover - squab - front seat
$% 78.90.08/81
Remove
1.Remove front seat.

+ SEATS, REPAIRS, Seat - front.
2.Place seat on a suitable work bench.
3.Tighten arm rest adjuster fully clockwise and
remove screw cover.
4.Remove screw securing arm rest to seat and
remove arm rest.
5.Remove 2 screws securing outer edge trim
casing to seat frame.
6.Remove trim casing.
7.Release inner edge of trim casing from seat
frame.
8.Remove trim casing. 9.Position seat upside down on table.
10.Release clip securing lower edge of squab
cover to seat frame.
11.Remove 2 clips securing either end of cover to
squab frame.
12.Position seat in upright position.
13.Raise headrest to maximum height.
14.Turn both guides through 90
°.
15.Remove headrest from seat.
16.Remove screws securing grab handles to seat
frame and remove grab handles.

SEATS
76-5-26 REPAIRS
17.Release clip securing front of cover to squab
frame.
18.Release hooks from squab frame.
19.Fold cover upwards over squab until first row of
hog rings are visible.
20.Remove first row of hog rings. 21.Fold cover upwards over squab until second
row of hog rings are visible.
22.Remove second row of hog rings.
23.Push out centres of trim clips securing stowage
pocket elastic to seat frame.
24.Remove trim clip outers.
25.Release hooks from seat frame and feed
though to front of foam.
26.Fold cover upwards until third row of hog rings
are visible.
27.Remove third row of hog rings.
28.Remove hog rings securing rear of squab
cover to seat frame.
29.Release bar from seat frame.

SEATS
REPAIRS 76-5-27
30.Remove headrest guides.
31.Fold cover fully upwards and remove. Refit
1.Fit squab cover to top of seat. Do not fold down
too far onto seat.
2.Fit headrest guides.
3.Fit grab handles to seat and secure with
screws.
4.Ensure top of cover fits correctly around grab
handles.
5.Fit bar securing rear of squab cover to seat
frame.
6.Fit hog rings securing rear of squab cover to
seat frame.
7.Pull cover down tight and align hog ring
location points.
8.Fit third row of hog rings.
9.Pull cover down tight and feed hooks though
foam.
10.Connect hooks to rear of squab frame.
11.Align stowage pocket elastic to seat frame and
secure with trim clips.
12.Pull cover down tight and align hog ring
location points.
13.Fit second row of hog rings.
14.Pull cover down tight and align hog ring
location points.
15.Fit first row of hog rings.
16.Pull cover down tight and connect hooks to
squab frame.
17.Feed front of cover through to rear.
18.Secure bottom of cover to frame with clip.
19.Fit clips securing ends of cover to frame.
20.Fit headrest to seat.
21.Turn seat upside down.
22.Secure rear edge of squab cover to frame with
clip.
23.Turn seat correct way up.
24.Fit inner edge trim casing to seat frame.
25.Fit outer edge trim casing and secure with
screws.
26.Position arm rest to seat, secure with screw and
loosen arm rest adjuster to the required
position.
27.Fit front seat.

+ SEATS, REPAIRS, Seat - front.

SEATS
76-5-28 REPAIRS
Cover - squab - RH rear seat
$% 78.90.13
Remove
1.Remove rear seat.

+ SEATS, REPAIRS, Seat - rear.
2.Remove centre rear seat belt.

+ RESTRAINT SYSTEMS, REPAIRS,
Seat belt - rear - centre.
3.Remove 2 screws securing end cover and
remove end cover.
4.Remove both head restraint guide tubes. 5.Remove 2 screws securing squab release
lever, release cable and remove lever
assembly.
6.Release catches securing arm rest supports,
lower arm rest, release arm rest hinge catches
and remove arm rest assembly.
7.Release squab from 10 hooks in arm rest
recess.

SEATS
REPAIRS 76-5-29
8.Release top and bottom rap round clips in arm
rest recess.
9.Remove 3 studs securing squab to centre of
frame.
10.Release squab from 5 studs securing RH side.
11.Release 9 side clips securing squab to frame,
release and remove squab assembly.
12.Release squab from sides of pad to access
hog rings.
13.Remove 29 hogs rings and remove squab
cover from pad.
Refit
1.Position squab to pad and secure with hog
rings.
2.Position squab assembly to frame and secure
side clips.
3.Secure squab to hooks at RH side and fit studs
to centre of frame.
4.Fit top and bottom rap round clips and hooks in
arm rest recess.
5.Fit and secure arm rest assembly.
6.Position squab release lever, connect cable
and secure with screws.
7.Fit head restraint guide tubes.
8.Position end cover and secure with screws.
9.Fit centre rear seat belt.

+ RESTRAINT SYSTEMS, REPAIRS,
Seat belt - rear - centre.
10.Fit rear seat.

+ SEATS, REPAIRS, Seat - rear.
Heating element - squab - front seat
$% 78.90.36
Remove
1.Remove front seat squab cover.

+ SEATS, REPAIRS, Cover - squab -
front seat.
2.Disconnect heating element multiplug.
3.Carefully release heating element from squab
pad, ensuring adhesive does not tear squab
pad.
Refit
1.Ensure squab pad is free of adhesive.
2.Remove adhesive cover from new heating
element, position element and secure to squab
pad.
3.Fit front seat squab cover.

+ SEATS, REPAIRS, Cover - squab -
front seat.

SEATS
76-5-30 REPAIRS
Head restraint - third row seat
$% 78.50.10
Remove
1.Fold down both third row head restaints.
2.Release upper tail gate finisher from 6 clips and
remove finisher.
3.Remove 3 bolts securing head restraint and
remove head restraint.
Refit
1.Position head restraint, fit and tighten bolts.
2.Position upper tail gate finisher and secure in
clips.
M78 0493
M78 0494

SUNROOF
DESCRIPTION AND OPERATION 76-6-1
SUNROOF DESCRIPTION AND OPERAT ION
Electric sunroof component location
RHD shown, LHD similar
1Sunroof front switches
2Front sunroof motor and microswitch
3Rear sunroof - rear switch
4Sunroof ECU
5BCU

SUNROOF
76-6-4 DESCRIPTION AND OPERATION
System block diagram
1Passenger compartment fuse box
2BCU
3Sunroof ECU
4Front sunroof switch
5Front sunroof motor and microswitch
6Rear sunroof - front switch
7Rear sunroof isolation switch
8Rear sunroof - rear switch
9Rear sunroof motor and microswitch

SUNROOF
DESCRIPTION AND OPERATION 76-6-5
Description
General
The sunroof system consists of a front and a rear sunroof assembly. Both sunroof assemblies slide and tilt to open.
The sunroof system consists of the following components:
lSunroof ECU.
lBCU.
lFront sunroof switch.
lFront sunroof motor and microswitch.
lRear sunroof - front switch.
lRear sunroof - rear switch.
lRear sunroof isolation switch.
lRear sunroof motor and microswitch.
The BCU enables operation of the sunroof ECU. If the sunroof ECU does not receive an enable signal from the BCU,
neither sunroof assembly operates. The BCU is located behind the glovebox. The sunroof ECU is located above the
headlining next to the front sunroof assembly.
TestBook diagnoses the sunroof ECU.
Front sunroof switch
The front sunroof switch is located in the roof console above the windscreen in front of the front sunroof. It controls
the front sunroof motor via the sunroof ECU.
The front sunroof switch supplies an earth signal to the sunroof ECU. The pin at the ECU that receives the earth
signal determines whether ECU causes the sunroof to open or close.
TestBook cannot monitor the state of the front sunroof switch.
The following table lists the values which can be measured at the listed ECU pins when the conditions outlined are
met:
Signal values (connector connected)
Connector/Pin
No.Condition Resistance, ohms
C0784-2 Ignition in position II, front sunroof switch released > 10,000
C0784-2 Ignition in position II, front sunroof switch open < 0.5
C0785-7 Ignition in position II, front sunroof switch released > 10,000
C0785-7 Ignition in position II, front sunroof switch closed < 0.5