Land Rover Fuel Injection System Manual

							FUEL INJECTION SYSTEM1987-88 yo$;;
INTAKE MANIFOLDRemove and refit
RemovingDepressurize the fuel system.
Disconnect the battery negative terminal.
Release the hose clamp and remove the
radiator bottom hose to enable the cooling
system to be partially drained, so that coolant
level is below the thermostat housing, refit the
hose and secure in position with the hose
clamp.Remove the plenum chamber (see Plenum
Chamber, remove and refit).
Remove the ram housing (see ram housing
remove and refit).
CAUTION: Place a protective cover over the
intake manifold openings to prevent ingress of
dirt.
6.
7.
8.
9.
10.
11.
12.
36Disconnect the electrical multi-plugs to the
fuel temperature thermistor (sensor), coolant
temperature thermistor (sensor) and injectors.
Remove the two nuts and bolts securing the
pressure regulator to the fuel rail, ease the
regulator out of the rail, seal the end of the
fuel rail with suitable plastic plugs to prevent
ingress of dirt.
NOTE: The intake manifold can be removed
from the cylinder block without removing
the fuel rail and injectors.
Disconnect the electrical leads from the
air-conditioning engine coolant sensor located
on the thermostat elbow.
Disconnect the electrical leads to the coolant
temperature transmitter (sensor) located at the
front of the intake manifold.
Remove the injector harnesses from behind
the fuel rail and lay to one side.
Release the hose clamps securing the two
heater hoses to the rigid heater pipes at the
front of the right hand rocker cover.
Remove the two bolts securing the rigid
heater pipes to the intake manifold and ease
the pipes out of the hoses.
13. Lay the heater pipe assembly to one side.
14. Release the twelve bolts securing the intake
manifold to the cylinder heads.
15. Lift the manifold off the cylinder heads and
remove from the engine compartment.
16. Remove the two gasket clamps from the top
of the cylinder block.
17. Lift off the gasket and remove the gasket
seals.18. Remove previous sealing compound from
around the water passage openings of the
cylinder heads.
Refitting
19. Locate the NEW seals in position with their
ends engaged in the notches formed between
the cylinder heads and block.
, ‘.
20. Lightly apply ‘Hylomar’ sealant around the
outside of the water passage openings on the
cylinder heads, manifold gasket and intake
manifold.
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							FOE; 1987-91
FUEL INJECTION SYSTEM
‘. :.. .
201
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.,:: :21.
22.
23.
24.
25.
26.
27.
28.
29.Fit the manifold gasket with the word ‘FRONT’
to the front and the open bolt hole to the
front right hand side.
Fit the 
gasket clamps but DO NOT fully
tighten the bolts at this stage.
Locate the intake manifold onto the cylinder
heads, clean the threads of the manifold
securing bolts.
Fit all manifold bolts and tighten them a little
at a time, evenly, alternate sides working from
the centre outwards.
Tighten to correct torque (see section 06
Torque values).
Tighten the gasket clamps to the correct
torque (see section 06 Torque values).
Reverse remaining removal instructions.
Replenish the cooling system.
Start the engine, check for water and fuel
leaks.
FUEL FILTERRemove and refit
Refitting
WARNING: The spilling of fuel is unavoidable
during this operation. Ensure that all necessary
precautions aretaken to prevent fire and
explosion.
1.
2.
3.
4.
5.Depressurize the fuel system.
The fuel filter is located on the right hand
chassis side member 
fotward of the fuel tank
filler neck. Access to the filter is gained
through the right hand rear wheel arch.
Thoroughly clean the immediate area around
the hose connections to prevent ingress of
foreign matter into the fuel system.
Loosen the two hose clamps nearest the filter
to enable the hoses to be removed from the
filter canister. Plug the end of the hoses to
prevent ingress of dirt.
Release the securing bolt and bracket and
remove the filter from the chassis side
member.
Refitting
6. Fit a new filter observing the direction of flow
arrows stamped on the canister.
7. Start the engine and inspect for fuel leaks
around the hose connections.
REVISED: SEPT. 9037 
						

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KANGIZFUEL INJECTION
SYSTEM1987-91 ROVER
.*
FUEL TANKRemove and refit
RemovingWARNING: Ensurethat the Fuel Handling
Precautions given in Section 01 
- Introduction
regarding fuel handling are strictly adhered to
when carrying out the following instructions.
CAUTION: Before disconnecting any part of the
fuel system it is imperative that all dust, dirt and
debris is removed from around the components
to prevent ingress of foreign matter into the fuel
system.
1.
2.
3.
4.
5.
6.
Drive the vehicle onto a suitable hoist.
Depressurizethefuelsystem.(see
depressurizing procedure-page 34)
Disconnect the battery negative terminal.
Disconnect the electrical leads to the fuel tanksender unit.Disconnect the fuel pump
electrical multiplug, access to which is gainedthrough the left hand rear wheel arch, the
plug is located between the underside of the
body and chassis side member.
Raise the hoist.Remove the drain plug from the bottom of the
fuel tank and drain the fuel into a suitable
container that can be sealed afterwards.ENSURE THAT THE TANK IS DRAINED
COMPLETELY.Refit the drain plug (refer to Warning
concerning fuel handling at start of this
procedure.From underneath the vehicle
7.
8.
9.Disconnect the fuel hose from the inlet side
of the fuel filter.
Disconnect the fuel return pipe to the fuel
tank.
Removethe breather hose and three
evaporative loss hoses from the fuel tank, seal
all hose and pipe openings to prevent ingress
of foreign matter.
RRPOIOE
*f .,3IO. Release the two large hose clamps, securing
the inter-connecting hose to tank and filler
tube, maneuver the hose up the outside of
the filler tube to enable it to be withdrawn
from the tank filler neck.
‘..
‘-’ ,
,., :>11. With assistance from a second person
supporting the fuel tank, remove the four tank
fixings.
12.
13.14.Tilt the left hand side of the tank downwards
and maneuver it out of the chassis frame. Careshould be taken to ensure that the fuel feed
pipe to filter is not damaged when lowering
the tank.
Place the tank in a safe area and ensure that all
necessary precautions are undertaken to makeall personnel within the vicinity aware that the
tank will give off residual fuel fumes.If necessary remove the fuel pump from the
tank. (See Fuel Pump remove and refit).Refitting
15.
16.
17.38
REVISED: SEPT.90Refit the fuel tank to the chassis, taking care
to relocate the fuel feed pipe grommets
between the fuel tank and chassis.
Reverse the removal procedure, ensuring that
thesealingring.fuel lineand hose
connections are secure.I(Run the engine and re-check all connections
to ensure no fuel leaks exist. Reverse the
remaining removal procedure. Recode the
radio.
‘l.., 
						

							FUEL INJECTION SYSTEM iI-9 1
FUEL PUMPRemove and refit
RemovingWARNING: Ensure
that the Fuel Handling
Precautions given in Section 01 
- Introduction
regarding fuel handling are strictly adhered to
when carrying out the following instructions.
1. Drive the vehicle onto a suitable hoist.
2. Depressurize the fuel pump system. (see
depressurizing procedure-page 
34)3. Disconnect the battery negative terminal.
4. Remove the fuel tank from the chassis frame.
(see fuel tank remove and refit-page 38)
5. Place the tank in a safe area.
6. Disconnect the fuel supply hose from the
pump.7. Remove any previous sealant from the top of
the pump flange.
8. Remove the five screws and withdraw the
pump from the tank.
Refitting
9. Clean the immediate area around the pump
opening in the fuel tank.
10. Fit a NEW pump seal.
11. Secure the pump to the tank and tighten the
screws securely.
12. Liberally coat the heads of the screws and
flange of the fuel pump with Sikaflex 221
flexible adhesive sealant.
13. Reverse the removal procedure, ensuring that
thesealingring,fuel lineand hose
connections are secure. Recode the radio.
14. Run the engine and re-check all connections
to ensure no fuel leaks exist. Reverse the
remaining removal procedure.
Continued
REVISED: SEPT. 9039 
						

							KANGE
FUEL INJECTION SYSTEM1987-91 ROVER
FUEL PIPESKEY
WARNING:Depressurize fuel system before
disconnecting any of the fuel pipes and ensure
that all necessary precautions are taken against
fuel spillage.1. Fuel feed hose to fuel rail.
2. Fuel return hose to fuel tank.3. Rigid fuel feed pipe.
4. Rigid fuel return pipe.
5. Fuel filter.
6. Rigid fuel feed pipe to filter.
7. Breather hose.
8. in-tank fuel pump.
9. Fuel filler neck.
10. Fuel tank.
RRPOISE
REVISED: SEPT. SO 
						

							;;^d;& 1989
FUEL INJECTION SYSTEM 11%) 1
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AF32884EISVIFUEL INJECTION 
- Circuit Diagram - 1989 Model Year
1. 40 way connector to Electronic Control Unit
(ECU).
2. Lambda sensor (left side 
- bank A).
3. Lambda sensor fright side 
- bank 6).4. By-pass air valve (stepper motor) (fast idle).
5. Lambda sensor screened ground.
6. Fuse 18 
- main fuse panel.
7. Inertia switch.
8. Fuel pump.18. Fuel temperature thermistor (sensor) (input).
19. Throttle potentiometer.
20. Air flow sensor.
21. Fuel pump relay.
22. Main relay.
23. Injectors-l to 8.
24. Pick-up point E.F.I. warning symbol (instrument
binnacle).9. Ignition switch.
10. Speed transducer (road speed input).
11. Neutral switch (automatic gearbox) (load
input).
12. Main cable connector.
13. Battery.
14. Diagnostic plug.
15. In-line resistor.
16. Coil/-ve (engine RPM input).
17. Coolanttemperaturethermistor (sensor)
(input).25. Heated front screen sense.
26. Purge control valve.
27. 
12\/ from fan relay.
28. Air conditioning switch sense.
29. Air conditioning output 
co?itrof.30. Air conditioning load input.
31. Fan relay feed.
32. Heater/air con. cable connector.
33. Condenser fan timer control.
= = =Denotes screened ground.
NOTE: Reference to left and right side is made when viewing vehicle from rear.
1ADDITION: SEPT. 88 
/ REVISED: MAY 8941 
						

							\
19 FUEL INJECTION SYSTEM
RANGE
lg8’ ROVER
FUEL INJECFION SYSTEMFor 1989 model year, the EFI system has a Lucas
14CU electronic control unit. This is a development
of the 
13CU used on 3.5 litre vehicles.
In most respects the 14CU works in the same way
using the same engine components, it does
however have additional capacity, enabling it to
control fuel tank vapour purging and air
conditioning.
Condenser fansIt should be noted that under high coolant
temperatures, when the engine is switched off, the
condenser fans will be activated and will run for
approximately ten minutes.
Throttle potentiometer
A further improvement is the fitting of a ‘self
adaptive’ throttle potentiometer. This means that
adjustment of the throttle potentiometer is no
longer possible. It
alsomeansthat
the
potentiometer setting is not lost, for example,
when throttle stop wear occurs.
Purge valveThe operation of the charcoal canister purge valve
is checked during the fuel injection system test. See
TESTS 9 and 10 Section 19, page 48.
Recommended equipment
The diagnostic equipment used for checking out
the 
l4CU system is the same as that used for
I~CU, with the addition of a new memory card for
the Hand held test unit.
14CU Memory card
Lucas Part Number 
- 54746500
CONTINUITY TEST PROCEDURETest procedure using a multi-meter is carried out as
for 
13CU, with the addition of tests for the purge
control valve, air conditioning, heated front screen
and condenser fan inputs.
The use of a hand held vacuum pump, for example
a 
‘Mityvac’, is required to carry out Tests 9 and IO.
Note that the 40 way multi-plug to the ECU is
wired as in the following table.
PIN NOS.CABLE COLOUR
1.Redigreen
2.Brown/orange
3.Yellow
4.
Black
5.Black/white
6.Yellow
7.Green/blue
8.Purple/yellow
9.White/lightgreen
10.
Black/Yellow11.Yellow/white
12.
Blue/red13.Yellow/blue
14.
Black15.Brown
16.Blue/purple
17.
Grey/yellow18.White/pink
19.
Whitelgrey20.
Red21.
Yellow/black22.
Blue/red23.Blue
24.Blue
25.
Red/black26.Green/white
27.
BlackIgrey28.
Blue/grey29.
Orange30.Not used
31.Not used
32.
Creylwhite33.
Black/grey34.
Black/orange35.
Blue/green36.
Black/green37.White/yellow
438.Not used
39.White/black
40.
BlackThe last colour denotes the wire tracer colour.
42
ADDiTlON: SEPT. 88 / REVISED: MAY 89 
						

							K”d;‘;rt 1989
FUEL INJECTIONSYSTEM
TESTS 
- Using a Multi-Meter - 14CU system - Key to Symbols
The following continuity tests are intended as a guide to identifying where a fault may be within a circuit;
reference should be made to the fuel injection circuit diagram for full circuit information.
ELECTRONIC CON
AND MULTIPLUGCONNECTION
PUMP RELAYFUEL PUMP
ROAD SPEED
INPUT (SPEED
TRANSDUCER)
TEMPERATURE
POTENTIOMETER
HOT WIRE AIRFLOW METERADDITION: SEPT. 88 
/ REVISED: MAY 8943 
						

							..’,.. 1,.’ .
l-119 FUEL INJECTION SYSTEM1989 t(ANbtROVER
NOTE: 
Ail tests are carried out from the electronic control unit (ECU) harness multi-plug unless stated
otherwise in the test procedure.
‘EST PROCEDURE
.Check battery supply to ECURESULTS 
- Check cables and units shown in bold
Voltmeter reading of batten/ volts 
-(mimimum battery voltage IO volts)
Proceed to Test 2Voltmeter reading of zero volts
Check:-IGNITION OFF
TEST PROCEDURE
2.Check ignition supply to ECURESULTS 
- Check cables and units shown in bold
Voltmeter reading of battery volts 
-(minimum battery voltage 10 volts)
Proceed to Test 3
Incorrect reading check:-
1 1 /
-mI-0
’ I ’IGNITION ON
RR262OE44ADDITION: SEPT. 88 
I REVISED: MAY 89
:. 
						

							k”d;‘ir; 1989
FUEL INIECTION SYSTEM 119 1
rEST PROCEDURE
I.Check operation of
Main relayI 
-4
RESULTS - Check cables and units shown in boldVoltmeter reading of battery volts 
-Proceed to Test 5
Voltmeter reading of zero volts 
-Proceed to Test 
4
I
J
\ 1 /
-aI-cl
’ I \IGNITION ON
1.Fault DiagnosisVoltmeter readingof battery volt
Main relay circuits
IGNITION OFF
Continued
ADDITION: SEPT. 88 
! REVISED: MARCH SO45