Land Rover Fuel Injection System Manual

,’ :’
.,,
. . ..I
r-l19 FUEL INJECTION SYSTEM1989 wiNCltROVER
EST PROCEDURE
!l.Check for leaking injector
NOTE: Before removing any
of the injectors, remove and
examine the spark plugs,
check for consistent
colouralion of plugs.
A leaking injector will
result in the appropriate
spark plug being ‘sooted up’.
Remove all injectors from
manifold but do not
disconnect from fuel railRESULTS 
- Check cables and units shown in bold
WARNING: Ensure that all
necessary precautions are takento prevent fire and...

k”d;;r; 1989
FUEL INJECTION SYSTEM 119 1
‘EST PROCEDURE
!3.Right bank ‘B’ injectors 2,4,6,8
3
Q
‘; ,, \I\,
.8IJ’
\ 1 /
-aI-0
’I ’IGNITION ON
RRz64R
rEST PROCEDURE
14.Check gear switch input
IGNlTlbN ON
RR2646ERESULTS 
- Check cables and units shown in bold
WARNING: Ensure that 
aIfnecessary precautions are takenIO prevent fire and explosion
Repeat test for other injectorsReplace any injector which does not operate
NOTE: Fuel flow is 
160-175 cc fusing mineral spirils)or 180-195 cc (using gasoline)...

. .
.‘,:
..).:
:..i .;.(.....,,:,.
l-l19 FUEL INJECTION SYSTEM1989 ;;^o”v‘;r;
rEST PROCEDURE
15.Check road speed input
NOTE: Raise and rotate the 
left hand
teat road wheel slowlyRESULTS 
- Check cables and units shown in bold
Voltmeter reading of 0 to 
12V fluctuating 6 times per
revolution 
- Proceed to Test 26
Incorrect reading
Check:
\ 1 /----
0
’I ’IGNITION ON
RRw4aEVOTE: Remove pump relay from its connector
IGNITION OFF
. . . c’
:58ADDITION: SEPT. 88 
/ REVISED: SEPT. 90
. .‘.. :I 

FUEL INJECTION SYSTEM 119 1
rEST PROCEDURE
16a. Check Lambda sensor supply
A. LH Lambda sensor
6. RH Lambda sensor
0
I-IGNITION OFF
RA2707E
rEST PROCEDURE26b. Check Lambda sensor operation
Nole: Select ‘P’ in main gearbox and run engine at
1000 revlmin, normal operating temperature
A. LH Lambda sensor
B. RH Lambda sensor
RR2708ERESULTS 
- Check cables and units shown in bold’Correct 
Vl and V2 - 12 volts
Proceed to Test 26b
Incorrect reading
Check:
RESULTS 
- Check cables and units shown in bold
Correct...

,;. ”
; ..‘. . .
1191FUEL INJECTION SYSTEM1989 k”d;;i;i
‘EST PROCEDURE
!7.Check air conditioning thermostat inputRESULTS 
- Check cables and units shown in bold
Voltmeter reading of battery volts 
-Proceed 
lo Test 28
NOTE: Select air conditioning position
and move thermostat switch to cold
KEY:1. Fuse 82. Air conditioning switch
3. Air conditioning thermostat
4. High pressure switch 
- air conditioning
5. Compressor clutch relay
27
Incorrect reading
Check:
IR2651ENOTE: Select heater fan speed 
I. II or...

KAl~bJrROVER 
“*’FUEL INIECTION SYSTEM 119 1II
RESULTS - Check cables and units shown in boldVoltmeter reading of 12 volts 
-Proceed to Test 31
TEST PROCEDURE
29.Check operation ot compressor clutch relay
NOTE: Select air conditioning position,Incorrect reading of zero volts
thermostat cold, and tan speed I, II, or IllProceed to Test 30
30.Fault diagnosis - compressor clutch relayr reading of 12 volts -
NOTEz Select air conditioning position,
thermostat cold, and tan speed I, II or Ill
KEY:
1. Compressor...

1191FUEL INJECTION SYSTEM1989 ;;^d;&
EST PROCEDUREIl.Check heated front screen input
NOTE: Engine running, heated front screen
Incorrect reading of zero voltsswitched ‘ON’
Check:
KEY:1. Oil pressure switch
2. Front screen timer unit
3. Front screen switch
rEST PROCEDURE
12.Check operation of condenser fan output
Disconnect coolant temperature sensor and fuel
temperature sensor and bridge plug connectors
NOTE: Switch ignition ‘ON’ for 5 seconds, switch
ignition ‘OFF’
The fan timer will operate the fans...

. .
.‘;..L.,
::.,’XFUEL INJECTION SYSTEM 
119 1‘EST PROCEDURE
13.Fault diagnosis - condenser fan outpulRESULTS 
- Check cables and units shown in bold
Voltmeter reading of 12 volts 
-
Suspect ECUKEY:
1. Condenser fan timer
2. Condenser fan relay
3. Fuses Al and A2
4. Condenser fans
Incorrect readingCheck:
\ 1 /
-a-0
’ I ’IGNITION ON
IR 2676E
After completing the tests with either the ‘Diagnostic’ equipment or multi-meter, re-test the vehicle to ensure
the faults have been rectified. If faults still...

12BA6
ov-
E
I
BGWG4IN .+
l-
3
---
BNBR
t B
I9I---
RWOlOE
,, ,. :’Condenser fan circuit diagram RR2610E
1.12V from EFI main relay.
2.Condenser fan timer unit.Condenser fans/Condenser fan timer
Check operation
3.Fanrelay.1.4.12Vbattery feed.
2.
5.Trigger, from ECU.
6.12Vfrom fan relay.3.
7.Fuse Al-20 amp.
8.Fuse A2-20 amp.
9.Fanmotors4.
5.
6.64
ADDITION: SEPT. 88 / REVISED: SEPT. 90
7.Start engine.
Move air con/heater control to air conditioning
position.
Check condenser fans, if working the
condenser fan...

KANbtROVER 
lg8’FUEL INJECTIONSYSTEM
OVERHAUL 
THROlTLE LEVERS AND THROTTLE11. Remove the large hose from the neck of the
VALVE 
- 3.9 V8 Modelplenum chamber.12. Disconnect the multi-plug to the throttle
potentiometer.
Preparation, remove, overhaul and refit
Preparation
1.
2.
3.
4.
8.
9.
10.Disconnect the battery negative terminal.
Disconnect the electrical multi-plug from the
bypass air valve (stepper motor).
Disconnect the small vacuum hose at the rear
of the plenum chamber, located below the
bypass...