Land Rover Fuel Injection System Manual
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,’ :’ .,, . . ..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 explosion. Replace any injector which leaks more than 2 drops of fuel per minute. IGNITION ON RR2648E ‘EST PROCEDURE 12.Check for injector operation Left bank ‘A’ injectors 1,3,5,7RESULTS - Check cables and units shown in bold WARNING: Ensure that allnecessary precautions are taken IO prevent fire and explosion. Repeat test for other injectors Replace any injector which does not operate. NOTE: Fuel flow is 160-175 cc (using white spirit) or 180-195 cc fusing petrol) (minimum) per minute per injector, al 2.54 kgflcm’ (36.25 psi) system pressure at 20% 2 2°C IGNITION ON IR2646E 56ADDITION: SEPT. 88 / REVISED: MAY 89
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) (minimum) per minute per injeclor, al 2.54 kghcm’ (36.25 psi) system pressure at 20°C + 2°C RESULTS - Check cables and unils shown in bold Voltmeter reading of zero volts-Neutral and park Voltmeter reading of 2.5-5.0 Volts -R.D.3.2.1 - Proceed to Test 25 Incorrect reading Check:ADDITION: SEPT. 88 / REVISED: SEPT. 9057
. . .‘,: ..).: :..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 0.5OV - l.OOV fluctuating Incorrect 0.050 V - Check: Air leaks, faulty or contaminated injectors, low fuel pressure - if OK fit new Lambda sensor Incorrect l.OOV - Check: High fuel pressure, leaking injectors, saturated carbon canister - if OK fit new Lambda sensor. - Aa LTADDITION: SEPT 88 / REVISED: SEPT. 8959
,;. ” ; ..‘. . . 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 Ill KEY:1. Fuse 6 kRZOS2E60ADDITION: SEPT. 88 / REVISED: SEPT. 89
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 clutch relay 2. Compressor clutch 3. High pressure switch 4. ThermostatContinued ADDITION: SEPT. 88 / REVISED: DEC. 8861‘.’‘.y:...
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 for approximately 10 minutes unless it is disconnected KEY:1. Condenser fan timer 2. Condenser fan relay RR2660ERESULTS - Check cables and units shown in boldIVoltmeter reading of 12 volts - Proceed to Test 32RESULTS - Check cables and units shown in bold Voltmeter reading of 12 volts - end of tests Voltmeter reading of zero voltsProceed lo Test 33 62ADDITION: SEPT. 88 / REVISED: DEC. 88
. . .‘;..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 persist, recheck using the Lucas diagnostic equipment. , ADDITION: SEPT. 88 I REVISED: SEPT. 9063
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 relay and wiring to the fans is functioning. If not working check fuses Al and A2, and the voltage between connections 86 on fan relay and earth. If 12 volts is not present, check wiring back to air con switch. If 12 volts is present, but fans NOT working, short out connections 30 and 87 on fan relay. If fans work fit new relay. If fans NOT working, check supply to fan relay from main harness. Apply a 12 volt supply for at least two seconds to connection 5 on fan timer within SIX SECONDS of switching enginoff.The condenser fans should run for 9. fminutes +0.5 minutes, and switch off. If the fans do not work after applying voltage to timer, short out connections 4 and 8 on fan timer, if fans work fit new fan timer. If fans do not work, check wiring.
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 air valve. To assist re-assembly mark an identification line on the throttle cable outer covering directly behind the adjustment thumb wheel before disconnecting the throttle cable from the throttle lever. Remove the cotter pin and clevis pin securing the throttle cable to the lever. Carefully pry the adjustment thumb wheel from the throttle bracket. Lay the cable aside. Release the retaining clip from the kick down cable and remove the clevis pin. To assist re-assembly apply adhesive tape behind the rear adjustment nut on the kick down cable outer sleeve to prevent the nut moving out of position. Release the front lock nut and remove it from the outer sleeve to enable the cable to be removed from the throttle bracket. Lay the cable aside.Remove the vacuum hose from the cruise control actuator.13. Remove the PCV breather hose. 14. Disconnect the two coolant hoses in turn and immediately plug the end of each hose to prevent excessive loss of coolant. Identify each hose for re-assembly. 15. Remove the distributor vacuum hose. 16. Release the two screws and remove the potentiometer. ADDITION: SEPT. 88 65