LR3/Disco 3
GENERAL
The TDV6 engine has an Electronic Diesel Control (EDC) engine management system supplied by Siemens. The system
is controlled by an Engine Control Module (ECM) and is able to monitor, adapt and precisely control the fuel injection. The
ECM uses multiple sensor inputs and precision control of actuators to achieve optimum performance during all driving
conditions.
The ECM controls fuel delivery to all six cylinders via a Common Rail (CR) injection system. The CR system uses a fuel
rail to accumulate highly pressurised fuel and feed the six, electronically controlled injectors. The fuel rail is located in
close proximity to the injectors, which assists in maintaining full system pressure at each injector at all times.
The ECM uses the drive by wire principle for acceleration control. There are no control cables or physical connections
between the accelerator pedal and the engine. Accelerator pedal demand is communicated to the ECM by two
potentiometers located in a throttle position sensor. The ECM uses the two signals to determine the position, rate of
movement and direction of movement of the pedal. The ECM then uses this data, along with other engine information
from other sensors, to achieve the optimum engine response.
The ECM processes information from the following input sources:
Crankshaft sensor (CKP)
Camshaft sensor (CMP)
Manifold air temperature and pressure
Coolant temperature
Oil temperature
Inlet air flow and temperature
Fuel rail temperature
Knock sensors (one per cylinder bank)
The ECM outputs controlling signals to the following sensors and actuator:
Fuel injectors
Cooling fan solenoid
Electronic Throttle
Electronic vane controlled turbo
Port deactivation
Fuel pressure control valve
Fuel volume control valve
E-box fan
Engine mounts
Electronic EGR
Glow plugs
ECM
11
Restraints control module
12
Stop light switch
13
Knock sensors
14
ECM
15
Fuse 60P
16
Fuse 25P
17
Ignition switch
18
Fuse 11E
