ECU LAND ROVER DEFENDER 1996 Workshop Manual

CHASSIS AND BODY
37
REPAIR REV: 05/9947.Connect leads and plugs to auxiliary switches
and clock.
48.Secure switch panel to lower fascia panel and
switch cover.
49.Position radio housing, if applicable, and feed
radio multi- plug, aerial and speaker leads from
switch cover to radio housing.
50.Secure radio housing to trim panel.
51.Fit radio connections and secure radio in
housing.
52.Fit crash pad to fascia bulkhead.
53.Fit demister vents in crash pad.
54.Fit grab handle to lower fascia panel and secure
to crash pad. Refit Land Rover decal.
55.Connect multi-plugs to rear screen, hazard and
interior lamp switches and fit switch panel to
fascia panel.
56.Fit heater control cable
See HEATING AND
VENTILATION, Repair, Heater control cable -
air distribution
.
57.Fit instrument panel
See INSTRUMENTS,
Repair, instrument panel
.
58.Fit steering column nacelle
See STEERING,
Repair, Steering column nacelle
.
59.Fit steering wheel
See STEERING, Repair,
Steering wheel
.
60.Reconnect battery.FRONT UNDERTRAY
Service repair no - 76.11.81 - Front undertray
Service repair no - 76.11.85 - Acoustic pad
Remove
1.Raise vehicle on ramp.
2.Position support under chassis front
crossmember.
3.Lower ramp to give clearance between axle and
undertray.
4.Remove 4 nuts, disconnect propeller shaft from
front axle, and move aside.
5.Remove 2 bolts securing undertray to chassis
front crossmember.
6.Remove nut securing undertray to bump stop
front fixing bolt on both sides.
7.Remove 2 bolts securing sides of undertray to
rear undertray.
8.Pull front undertray forwards to release flanges
from rear undertray.
9.Lower undertray to clear steering box etc. and
manouvre rearwards over axle.
10.Remove front undertray.
11.If necessary, remove 8 fasteners to release
acoustic pad from undertray.

76CHASSIS AND BODY
38
REPAIR Refit
12.If applicable, fit acoustic pad to undertray.
13.Fit undertray in position, ensuring flanges are
correctly located in rear undertray.
14.Secure undertray to chassis front crossmember,
bump stops and rear undertray. Tighten fixings
to
14 Nm (10 lbf/ft).
15.Fit propeller shaft to front axle and tighten nuts
to 47 Nm (35 lbf/ft).
16.Raise ramp to remove chassis support.
17.Lower ramp.REAR UNDERTRAY
Service repair no - 76.11.80 - Rear undertray
Service repair no - 76.11.82 - Acoustic pad
Remove
1.Raise vehicle on ramp.
2.Remove 2 bolts securing sides of undertray to
front undertray.
3.Remove 2 bolts securing rear undertray to
chassis crossmember brackets.
4.Remove bolt securing undertray to RH side of
chassis.
5.Pull undertray rearwards to release from flanges
of front undertray.
6.Remove rear undertray.
7.If necessary, remove 7 fasteners and release
acoustic pad from undertray.
Refit
8.If applicable, fit acoustic pad to undertray.
9.Fit undertray in position, ensuring flanges of front
undertray are correctly located.
10.Secure undertray to chassis crossmember, RH
chassis side, and front undertray. Tighten fixings
to
14 Nm (10 lbf/ft).
11.Lower ramp.

CHASSIS AND BODY
39
REPAIR ACCESS PANEL - FRONT UNDERTRAY
Service repair no - 76.11.85 - Access panel
Service repair no - 76.11.83 - Acoustic pad
The access panel is provided in the front undertray to
enable fitment of the wading plug into the engine
timing cover.
Remove
1.Raise vehicle on ramp.
2.Remove 5 bolts securing access panel to front
undertray.
3.Remove access panel.
4.If necessary, remove 5 fasteners and release
acoustic pad from access panel.
Refit
5.If applicable, fit acoustic pad to access panel.
6.Fit access panel to front undertray, Tighten
fixings to
14 Nm (10 lbf/ft).
7.Lower ramp.ACCESS PANEL - REAR UNDERTRAY
Service repair no - 76.11.84
The access panel is provided in the rear undertray to
enable fitment of the wading plug or timing tool
LRT-12-044in the flywheel housing, and access to
the engine oil sump drain plug.
Remove
1.Raise vehicle on ramp.
2.Rotate access panel anti-clockwise to release
locking flanges.
3.Remove access panel from undertray.
Refit
4.Locate access panel flanges in undertray
apertures.
5.Rotate panel clockwise to secure in undertray.
6.Lower ramp.

HEATING AND VENTILATION
1
REPAIR HEATER UNIT
Service repair no - 80.20.01
Remove
1.Remove bonnet and disconnect battery.
2.Remove radiator bottom hose at radiator union
and drain cooling system
See COOLING
SYSTEM, Repair, Drain and refill cooling
system
.
3.Slacken clips and remove heater hoses at
heater box unions.
4.Remove outer cable securing clips.
5.Slacken trunnions and remove control cables
from heater vent flap levers.
6.Remove heater wiring harness securing loop.
7.Disconnect harness multi-plug.
8.Remove interior bulkhead trim.
9.Remove lower nuts and bolts securing the
heater unit to the bulkhead.
10.Slacken heater unit upper retaining bolts.
11.Manoeuvre heater unit, complete with blower
motor, clear of air inlet duct and remove from
engine compartment.
12.If existing heater unit is to be refitted, remove
sealing rubber.
For heater matrix removal
See Heater matrix.
For blower motor removal
See Blower motor.
Refit
13.Smear a new heater unit sealing rubber with a
suitable impact adhesive and fit to heater.
14.Manoevre heater unit into position in engine
compartment, fit blower motor to air inlet duct
and locate upper fixing bolts.
15.Loosely fit heater unit lower fixing bolts.
16.Fully tighten upper fixing bolts.
17.Fully tighten lower fixings and refit interior
bulkhead trim.
18.Secure wiring harness and reconnect multi-plug.
19.Fit control cables to vent flap trunnions and
secure with outer cable clips.
20.Connect heater hoses.
21.Fit radiator bottom hose and refill cooling system
See COOLING SYSTEM, Repair, Drain and
refill cooling system
.
22.Fit bonnet and reconnect battery.

80HEATING AND VENTILATION
2
REPAIR BLOWER MOTOR
Service repair no - 80.20.15
Remove
1.Remove heater unit
See Heater unit.
2.Remove 3 nuts securing angled bracket to
heater unit. Pivot bracket to remove from studs.
3.Remove 5 nuts securing blower motor assembly
to volute housing.
4.Disconnect harness connector and remove
blower motor from volute housing.
5.Release circlip and withdraw impeller from motor
shaft.
6.Remove 3 nuts securing blower motor to
mounting plate.
7.Remove blower motor.
8.Examine components for signs of wear and
renew as necessary.
Refit
9.Apply Bostik 1261 adhesive to mating faces of
mounting plate and blower motor.
10.Fit blower motor to mounting plate and secure
with 3 nuts. Ensure rubber mountings are
correctly fitted.
11.Fit impeller to motor shaft and secure with circlip.
12.Position blower motor assembly in volute
housing and secure with 5 nuts. Fit angled
bracket to lower fixing.
13.Reconnect harness plug to resistor harness and
fit angled bracket to heater unit.
14.Fit heater unit
See Heater unit.HEATER MATRIX
Service repair no - 80.20.29
Remove
1.Remove heater unit
See Heater unit.
2.Remove 2 nuts securing angled bracket to
heater unit. Pivot bracket to remove from studs.
3.Remove 14 screws and detach two matrix
retaining plates from heater unit base.
4.Remove 9 screws securing matrix top retaining
plate.
5.Withdraw heater matrix through top of heater
unit casing.

HEATING AND VENTILATION
3
REPAIR Refit
6.Fit foam rubber to heater matrix casing.
7.Position matrix in heater unit casing.
8.Check that both vent flaps operate correctly
without sticking.
9.Secure matrix top retaining plate.
10.Secure matrix bottom retaining plates.
11.Fit heater unit
See Heater unit.RESISTOR UNIT
Service repair no - 80.20.17
Remove
1.Remove heater unit
See Heater unit.
2.Drill out 4 rivets securing resistor mounting plate
to top of volute housing.
3.Remove resistor and disconnect blower motor
plug from harness.
Refit
4.Apply Bostik adhesive to resistor mounting plate
and rivet to volute housing.
5.Reconnect blower harness motor plug.
6.Fit heater unit
See Heater unit.

80HEATING AND VENTILATION
4
REPAIR HEATER CONTROL CABLE - TEMPERATURE
CONTROL
Service repair no - 80.10.05
Remove
1.Disconnect battery.
2.Remove 4 screws securing instrument panel to
fascia cowl.
3.Pull instrument panel away from fascia and
disconnect speedometer cable to give easier
access to control cable at bulkhead.
4.Remove retaining screws and pull off air
distribution and temperature control lever knobs.
5.Remove 3 screws and detach side cover,
complete with control lever assembly.
6.Remove 2 screws securing control lever
assembly to side cover and remove cover. Note
plastic screw spacers fitted between cover and
control lever assembly and retain.
7.Remove small bolt and release outer cable
retaining clip.
8.Slacken grub screw and release inner cable from
clevis.
9.From inside engine compartment, release outer
cable retaining clip at heater unit.
10.Slacken trunnion fixing and release inner cable
from heater unit flap lever.
11.Release 2 retaining clips securing control cables
to engine bulkhead and heater hoses.
12.Pull control cable through bulkhead grommet
and remove from vehicle.
Refit
13.Fit new control cable to heater flap lever trunnion
with approximately 10 mm of inner cable
protruding from trunnion. Fully tighten trunnion.
14.Secure outer cable with retaining clip.
15.Route control cable through sealing grommet
and along inside of engine bulkhead to fascia
panel.

HEATING AND VENTILATION
5
REPAIR 16.Secure control cables to engine bulkhead and
heater hoses with retaining clips.
17.With control lever in closed position, fit inner
cable to lever clevis and fully tighten clevis grub
screw.
18.Fit outer cable retaining clip and fully tighten
securing bolt.
19.Fit side cover to control lever assembly. Ensure
fixing screw spacers are positioned between
cover and lever assembly.
20.Fit side cover to fascia.
21.Fit control lever knobs.
22.Reconnect speedometer cable and fit instrument
panel.
23.Reconnect battery.

80HEATING AND VENTILATION
6
REPAIR HEATER CONTROL CABLE - AIR DISTRIBUTION
Service repair no - 80.10.12
Remove
1.Disconnect battery.
2.Remove steering wheel
See STEERING,
Repair, Steering wheel.
3.Remove steering column nacelleSee
STEERING, Repair, Steering column nacelle.
4.Remove instrument panelSee INSTRUMENTS,
Repair, Instrument panel.
5.Remove retaining screws and pull off air
distribution and temperature control lever knobs.
6.Remove 3 screws and detach side cover,
complete with control lever assembly.
7.Remove 2 screws securing control lever
assembly to side cover and remove cover. Note
plastic screw spacers fitted between cover and
control lever assembly and retain.
8.Remove small bolt and release outer cable
retaining clip.
9.Slacken grub screw and release inner cable from
clevis.
10.Remove lower fascia panel assembly
See
CHASSIS AND BODY, Repair, Lower fascia
panel (heater duct) assembly.
11.Remove 19 screws and lift off heater duct cover.
12.Slacken vent flap trunnion fixing, release air
distribution control cable and remove from
heater duct.
13.Check condition of foam sealant on heater duct
cover and renew if necessary.

HEATING AND VENTILATION
7
REPAIR Refit
14.Fit new control cable through heater duct cover
and secure to vent flap trunnion. Bend over
cable end to fully secure.
15.Fit heater duct cover.
16.Fit lower fascia panel assembly to fascia
bulkhead
See CHASSIS AND BODY, Repair,
lower fascia panel (heater duct) assembly.
17.Route control cable along fascia bulkhead to
contol lever assembly.
18.With control lever in closed position, secure
cable to clevis.
19.Fit outer cable retaining clip to lever assembly.
20.Fit lever assembly to side cover. Ensure screw
spacers are fitted between cover and lever
assembly.
21.Fit side cover to fascia cowl.
22.Fit control lever knobs.
23.Fit instrument panel
See INSTRUMENTS,
Repair, Instrument panel.
24.Fit steering column nacelleSee STEERING,
Repair, Steering column nacelle.
CONTROL CABLE AND BLOWER MOTOR SWITCH
Service repair no - 80.10.17 - Control cable
Service repair no - 80.10.22 - Blower motor switch
Remove
1.Disconnect battery.
2.From inside engine compartment, release outer
cable retaining clip at heater unit.
3.Slacken trunnion fixing and release inner cable
from heater unit flap lever.
4.Release 2 retaining clips securing control cables
to engine bulkhead and heater hoses.
5.Remove 4 screws securing instrument panel to
fascia cowl.
6.Pull instrument panel away from fascia and
disconnect speedometer cable to ease access to
control cable.
7.Remove 2 screws securing control lever
assembly to side of fascia panel cowl. Note
plastic screw spacers fitted between cowl and
lever assembly and retain.