Land Rover Fuel Injection System Manual
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Page 101
.. I ..: ‘..’ : .p .’ . ,;. .‘., 1,:.:,. ,’‘,: ,.: 1191FUEL INJECTION SYSTEM1989 K”d;;; rEST PROCEDURE1RESULTS - Check cables and units shown in boldF1 !i.Check engine speed signal Voltmeter reading of 9.5 volts + 1 volt Cable and resislor Proceed to Test 6Voltmeter reading of zero volts Check:- 1 1 / -a-0 ’ I’IGNITION ON RR2631E -EST PROCEDURE i.Check operation of pump relayRESULTS - Check cables and units shown in bold Test lamp will illuminate for approximately 1 second when ignition is switched on...
Page 102
., -. : : 1,‘.FUEL INJECTION SYSTEM 119 1 TEST PROCEDURERESULTS - Check cables and units shown in bold 7.Fault diagnosisPump relay circuitsVoltmeter reading of battery volts - Suspect ECU Voltmeter reading of zero volts Check:-IGNITION ON RR2833E TEST PROCEDURE I.Check operation of Fuel pump NOTE: II is not possible to place the multi-meter probes directly onto the pump lerminals. A link lead attached lo the pump is accessible behind the rear left hand wheel located between the chassis and stowage area...
Page 103
1191FUEL INJECTION SYSTEM1989Tv\IYUCP(\VFR.--m.v . L..II TEST PROCEDURERESULTS - Check cables and units shown in bold 9.Check purge valve. Part 1 - seating Vacuum should hold for 2.5 minutes 1. Disconnect pipe from purge valve lo If vacuum correct proceed to test 10 plenum (al plenum) 2. Connect vacuum pump to pipe to purge valveIf vacuum incorrect check:3. Apply vacuum of 2.5 in/Hg3 0I- IGNITION OFF 9R2212E TEST PROCEDURE 10.Check purge valve. Part 2 - operation 1. Apply vacuum - 2.5 in/Hg, switch...
Page 104
R”d;;;i 1989 FUEL INIECTION SYSTEM 119 1 ” , .,” :’; :’ ,. ” ‘.*. 1 (. .‘.;:. .: .::F.‘, . .‘. ,: rEST PROCEDUREIl.Check injectors, Injector circuitRESULTS - Check cables and units shown in bold Ohm-meter reading of 4-4.5 Ohms -Proceed to Test 12Ohm-meter reading of 5-6 Ohms -Suspect 1 injector Ohm-meter reading of 8-9 Ohms -Suspect 2 injectors Pin 13 left bank ‘A’ injectors 1,3,5,7).Ohm-meter reading of 16-17 Ohms -Suspect 3 injectors Check for open circuit injector(s) or wiring faults. Ohm-meter...
Page 105
..: .‘i, . . .‘. . .,: 0.:. ::.X . 1191FUEL INIECT’IONSYSTEM1989 k”d;\;;ireading-temperature to ature Conversion IGNITION OFF 50ADDITION: SEPT. 88 / REVISED: DEC. 88
Page 106
FUEL INJECTION SYSTEM 119 1Temperature Conversion Should be Ohms 9100 - 9300 5700 -5900IGNITION OFF ,::ContinuedADDITION: SEPT. 8851
Page 107
l-i19 FUEL INJECTION SYSTEM MT PROCEDURE 15.Check air bypass valve - Par( 1RESULTS - Check cables and units shown in bold Ohm-meter reading of 40-60 Ohms - Proceed to Test 16 Incorrect reading Check:- IGNITION OFF ‘EST PROCEDURE 16.Check air bypass valve - Part 2 I0RESULTS - Check cables and units shown in bold Ohm-meter reading of 40-60 Ohms -Proceed to Test 17 Incorrect reading Check:- IWMOE 52ADDITION: SEPT. 88
Page 108
,.; __. :_ ,’ iEST PROCEDURE 17.Check throttle potentiometer - Part I17RESULTS - Check cables and unils shown in bold Ohm-meter reading of 4000-6000 Ohms -Proceed to Test 18Incorrect reading of Infinity Check:- KiNlTlON OFF IW641EThrottle closed: 0.085-0.545 volts) smooth ) swing) between RR2642EContinued ADDITION: SEPT. 88 ! REVISED: MAY 8953
Page 109
.,‘i ‘. ‘,I ,I ,.: .: .’ ..:j.’(’ :‘..,...>.s (... ‘._,,: .,,.’ ::‘. ::.‘.’?. a ’ TEST PROCEDURE RESULTS - Check cables and units shown in bold IS.Check output ofAirflow sensor TIGNITION ON IR2f343EVoltmeter reading of 0.2-0.7 volts-Proceed to Test 20 Incorrect voltmeter reading Check:- PRECAUTION:Depressurize the fuel system when fitting the fuel pressure gauge or disconnecting/replacing fuel system components. CAUTION: Thoroughly clean the immediate area around the fuel filter and hose connections...
Page 110
.“.. .‘C--ROVER lg8’FUEL INJECTION SYSTEM I19 1 ‘. 1.1.:. : rEST PROCEDURE 10.Check fuel system pressure Service tool 18C 1500 NOTE: Insert the pressure gauge in the fuel feed line immediately after the fuel line filter. The filter is located beneath the right hand rear wheel arch attached lo the chassisRESULTS - Check cables and units shown in bold (A)Expected reading 2,39-2,672 kgf/cm’ (34.0-38.0 p.s.i.) (B)Pressure drop-max 0.7 kgf/cm2(10 p.s.i.) in one minute Proceed to Test 21 IQNITION ON 0I-...