Defender (1999-2002). Manual — part 50
18 - ENGINE MANAGEMENT SYSTEM
CONTENTS
Page
DESCRIPTION AND OPERATION
COMPONENT LOCATION
2
. . . . . . . . . . . . . . . . . . . . ...
DESCRIPTION
5
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ENGINE CONTROL MODULE (ECM)
6
. . . . . . . . . . . . . . . . .
SENSOR - MASS AIR FLOW (MAF)
7
. . . . . . . . . . . . . . . . .
SENSOR - AMBIENT AIR PRESSURE AND
8
. . . . . . . . . . . . . ...
SENSOR - MANIFOLD ABSOLUTE PRESSURE
9
. . . . . . . . . . . .
SENSOR - ENGINE COOLANT TEMPERATURE
11
. . . . . . . . . . . .
SENSOR - CRANKSHAFT SPEED AND
12
. . . . . . . . . . . . . . ...
SENSOR - THROTTLE POSITION (TP)
14
. . . . . . . . . . . . . . .
SENSOR - THROTTLE POSITION (TP)
15
. . . . . . . . . . . . . . .
ELECTRONIC UNIT INJECTOR (EUI)
18
. . . . . . . . . . . . . . . ...
SENSOR - FUEL TEMPERATURE (FT)
20
. . . . . . . . . . . . . . .
RELAY - FUEL PUMP
21
. . . . . . . . . . . . . . . . . . . . . .
RELAY - MAIN
21
. . . . . . . . . . . . . . . . . . . . . . . . ...
SWITCH - BRAKE PEDAL
22
. . . . . . . . . . . . . . . . . . . . .
SWITCH - CLUTCH PEDAL
22
. . . . . . . . . . . . . . . . . . . ...
MODULATOR - EXHAUST GAS REGULATOR (EGR)
23
. . . . . . . . . .
WARNING LAMP - GLOW PLUG
23
. . . . . . . . . . . . . . . . . ..
GLOW PLUGS
24
. . . . . . . . . . . . . . . . . . . . . . . . ...
TURBOCHARGER
26
. . . . . . . . . . . . . . . . . . . . . . . .
INTERCOOLER
27
. . . . . . . . . . . . . . . . . . . . . . . . .
OPERATION
28
. . . . . . . . . . . . . . . . . . . . . . . . . ..
REPAIR
ENGINE CONTROL MODULE (ECM)
1
. . . . . . . . . . . . . . . . .
SENSOR - ENGINE COOLANT TEMPERATURE (ECT)
1
. . . . . . . . .
SENSOR - CRANKSHAFT SPEED AND POSITION (CKP)
2
. . . . . . . .
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18
ENGINE MANAGEMENT SYSTEM
2
DESCRIPTION AND OPERATION
COMPONENT LOCATION
ENGINE MANAGEMENT SYSTEM
3
DESCRIPTION AND OPERATION
1. Mass Air Flow (MAF) sensor.
2. Engine Coolant Temperature (ECT) sensor.
3. Glow plugs.
4. Manifold Absolute Pressure (MAP) / Inlet Air Temperature (IAT) sensor.
5. Fuel pump relay.
6. Engine Control Module (ECM).
7. Air Conditioning (A/C) and cooling fan relay.
8. Fuel Temperature (FT) sensor.
9. Crankshaft Speed and Position (CKP) sensor.
10. Electronic Unit Injectors (EUI).
11. Ambient Air Pressure (AAP) sensor.
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18
ENGINE MANAGEMENT SYSTEM
4
DESCRIPTION AND OPERATION
Passenger Compartment
1. Brake pedal switch.
2. Clutch pedal switch.
3. Accelerator pedal switch.
4. Diagnostic connector.
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