DescriptionThe supplementary heater aids coolant heating immediately following start-up and during running so that the engine heats up faster and engine service temperature and passenger compartment heating are maintained at optimal levels.The device works completely automatically and is active only when the engine is running with outdoor temperatures less than or equal to +5° C and coolant temperature lower than 60° C.When coolant temperature reaches 61° C, the control unit reduces burner power and cuts off operation when the temperature reaches 72° C. It is re-activated automatically when the fluid temperature drops to 60° C. If fluid temperature begins to drop immediately after reducing burner power, the control unit cuts in to restore full power. For more details see DESCRIPTION AND OPERATION: 5020L additional heater . The control unit supply line is protected by a fuse and a relay located in the service tank (behind the engine bulkhead).The relay supply line is protected by a fuse located in the junction unit.
Functional description Additional heater control unit M75 is supplied with the ignition on (INT/A) - pin 1 of connector B - from additional heater relay J36 : this receives its power supply directly from specific fuse line B38 . The ignition-operated power supply (INT/A) to the coil comes via relay R1 , on a line protected by fuse F13 : both are contained within junction unit B1 . Pin 2 of connector B of M75 is earthed. Pin 3 of connector A of M75 receives a signal from the appropriate temperature sensor K79 , which measures air temperature within the engine bay. The sensor only works with the engine running; it receives a reference signal from alternator (D+). This signal is low (earth) when the alternator is not turning. When the engine is running, this signal becomes high (12V) and supplies the sensor. Pin 6 of connector A controls additional heater pump N44 , which is earthed through inertia switch I50 . In case of impact, this cuts off the circuit to prevent the danger of fuel delivery. Control unit M75 is equipped with a self-diagnostic system that may be used by connecting the unit to connector R10 through pin 2 of connector A.
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213314824-5505A18multi-function controlunit - r r . 1. Undo the bolt (1a) and push back the junction unit as far asnecessary to disconnect the electrical connections (1b).767For precise identification ofthe electrical connections, see Wiring Diagrams Section.2. Remove the junction unit.2010592
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21 Make sure that the ignitionis off (STOP position), then disconnect the negative battery terminal(refer to op. 33148615530B10battery - r+r ). 1. Unscrew bolt (1a) and open fuse access cover (1b).2. Undo the bolt (2a) and remove the integrated multiservices unit(2b) after having disconnected the electrical connections (2c),(2d), (2e), (2f) and (2g).2010595
5505A29
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Open the bonnet lid.1. Release the retainers (1a) and remove the cover (1b) for theadditional junction unit.2071293
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213314864-5530B54battery cover - r+r . Make sure that the ignition key is in theOFF position.1. Disconnect the battery negative and positive terminals.2. Undo the bolt (2a) fixing the battery retaining bracket (2b).3. Remove the battery.2010647
5530B40
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213314864-5530B54battery cover - r+r1. Press and release the retainers (1a), then remove the cover (1b)for the supply box on the battery. 2071303
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting211. Working in the luggage compartment, undo the knob for the batterycover.2. Remove the battery cover.2010650
<anchor>1</anchor><span>Refitting</span><icon><imageid>21</imageid></icon>0Removing20.767The fuel tank is supplied by theParts Dept. together with the multifunction valves (which cannotbe dismantled) and the immersed pump assembly complete with gauge.Therefore if the tank has to be replaced it is not possible to reuse theimmsered pump assembly complete with gauge removed, but a new pre-assembledunit consisting of a tank - pump - multifunction valves suppliedby the Parts Dept. must be fitted.Move the fuel tank closer to its housingusing the hydraulic jack and connect the supply pipes to the fuel vapourseparator.Refit the fuel tank in its seating andsecure with its bolts.Remove the hydraulic jack from under thefuel tank.1. Replace the rear suspension crossmeber (1a) in its housing usingthe hydraulic jack (1b) and fix it tightening the bolts (1c) tothe recommended torque.Remove the hydraulic jack from under thecrossmember.2007293
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Position the vehicle on the lift.3315188-7040B10load platform (luggage platform) trim - r+r . 3314100-1040A70submerged pump assembly complete with level guagecontrol - r + r . Drain the fuel from the tank using suitableequipment.3314704-4450B11WHEEL (one) rear - R.R. (right) Undo the bolts and remove the rear partof the right rear wheel arch liner.1. Disconnect the connecting pipes to the valves on the tank fromthe fuel vapour separator.2. Disconnect the rapid attachment for the fuel vapour supply pipeto the canister.3. Undo the bolts fixing the fuel filler pipe to the bodyshell.4. Loosen the band fixing the fuel filler pipe to the hose.2007299
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Open the access flap to the fuel fillerpipe cap.Undo and remove the fuel filler pipe cap.
1040A70
769
1040A74
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21- 7045A10 l/h or r/h front seat (one) - r+r . 1. Cut the floor carpet along the marked line.2. Undo the bolts fixing the inertia switch to the bodyshell.3. Disconnect the electrical connection (3a) and remove the inertiaswitch (3b).2007309
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Position the vehicle on the ramp. Ensure that the ignition key is in OFFposition, then disconnect the battery negative terminal ( 3314861-5530B10battery - r+r ). Proceed with the removal 3315302-7055B54under-engine guard -r r . 1. Undo the drain plug in the radiator and drain the engine coolant.767Collect the coolant in a suitablecontainer.2010428
5020M14
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting211. Undo the bolts (1a) and remove the mounting bracket (1b) fromthe additional independent heater.2010449
5020M16
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Position the vehicle on the ramp. Ensure that the ignition key is in OFFposition, then disconnect the battery negative terminal ( 3314861-5530B10battery - r+r ). 1. Undo the nut (1a) and move aside the plug preheating controlunit (1b) after releasing the electrical wiring (1c) from the band(1d). 2010455
5020M20
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Position the vehicle on the ramp. Ensure that the ignition key is in OFFposition, then disconnect the battery negative terminal ( 3314861-5530B10battery - r+r ). Proceed with the removal 3314904-5550B30l/h or r/h horn (one)- r+r (right). 1. Disconnect the electrical connection from the external air temperaturesensor.2. Undo the bolt (2a) and remove the complete external air temperaturesensor (2b).3. Working at the bench, undo the bolt (3a) and detach the externalair temperature sensor (3b) and spacer (3c) from the mounting bracket(3d).2010464
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Position the vehicle on the ramp. Ensure that the ignition key is in OFFposition, then disconnect the battery negative terminal ( 3314861-5530B10battery - r+r ). 1. Disconnect the electrical connection from the fuel meterng/supplypump to the additional independent heater.2. Loosen the bands and disconnect the inlet and outlet pipes fromthe fuel metering/supply pump to the additional independent heater.767Plug the disconnected pipes asappropriate to stop fuel coming out.3. Undo the bolt (3a) and remove the fuel metering/supply pump tothe additional independent heater (3b) complete with mounting (3c).2010471
5020M32
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Position the vehicle on the ramp.1. Loosen the band (1a), undo the nut (1b) and remove the exhaustgas pipe for the additional independent heater (1c).2010472
5020M33
1. Undo the nuts (1a), lift the complete fuel filter (1b) as muchas necessary and disconnect the electrical connection from the water-in-fuelfilter sensor (1c). Move the complete fuel filter aside.2010476
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Position the vehicle on the ramp.1. Loosen the band (1a) and disconnect the diesel pipe for additionalheater (1b), electric pump side.2. Loosen the band (2a) and disconnect the rigid diesel pipe foradditional heater (2b) from the hose.3. Release the diesel pipe for additional heater from its attachmentsand remove it.2010492
5020M44
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Position the vehicle on the ramp.1. Loosen the band (1a), undo the nuts (1b), then remove the completeexhaust gas pipe for additional independent heater (1c).2010493
5020M52
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Position the vehicle on the ramp. Ensure that the ignition key is in OFFposition, then disconnect the battery negative terminal ( 3314861-5530B10battery - r+r ). Proceed with the removal 3315302-7055B54under-engine guard -r r . 1. Undo the drain plug in the radiator and drain the engine coolant.767Collect the coolant in a suitablecontainer.2010495
5020M55
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting211. Undo the bolts (1a) and remove the mounting bracket (1b) fromthe additional independent heater.2010503
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting211. Release the flexible water outlet pipe from the independent heaterfrom the fixing clips.2. Loosen the band (2a) and remove the flexible hot water outletpipe from the independent heater (2b).2010506
5020M90
<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21 Ensure that the ignition key is in OFFposition, then disconnect the battery negative terminal ( 3314861-5530B10battery - r+r ). Proceed with the removal 3314409-1016A10sound-proofing cover- r + r . 1. Undo the nut (1a) and move aside the plug preheating controlunit (1b) after releasing the electrical wiring from the fixingband. 2010507
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