Description and principle of operation (Freelander 2)

Pos.	spare part no	Name
1	-	Sensor (manifold absolute pressure) (MAP)
2	-	Fuel temperature sensor
3	-	Fuel rail pressure sensor
4	-	Nozzle (4 things.)
5	-	Pressure control valve
6	-	Fuel pump (including volume control valve)
7	-	Sensor (engine coolant temperature) (ECT)
8	-	(heated oxygen sensor) (HO2S)
9	-	Variable nozzle turbocharger controller (VNT)
10	-	crankshaft position sensor (CMP)
11	-	glow plugs (4 things.)
12	-	Valve (exhaust gas recirculation) (EGR)
13	-	Sensor (mass air flow) (MAF) / (air intake temperature) (IAT)
14	-	Oil level and temperature sensor (only in vehicles with a diesel particulate filter (DPF))
15	-	Sensor (engine oil pressure) (EOP)
16	-	IAT sensor
17	-	Electronic throttle

NOTE: Option shown (left hand drive) (LH), (right hand drive) (RH) similarly.

Pos.	spare part no	Name
1	-	Differential pressure sensor (only cars with DPF)
2	-	(engine control module) (ECM)
3	-	Stop signal switch
4	-	Sensor (accelerator pedal position) (APP)
5	-	Speed Control Interlock Switch
6	-	Start lock switch
7	-	clutch switch
8	-	Lower Exhaust Temperature Sensor (only cars with DPF)
9	-	(battery electrical junction box) (BJB)
10	-	transmission control module - (TCM) (only models with automatic transmission)
11	-	Air conditioning compressor (A/C)
12	-	Cooling fan control module
13	-	Upper temperature sensor (only cars with DPF)
14	-	Heated oxygen sensor

The TD4 diesel engine has an Electronic Diesel Control system (EDC). The system is controlled by the ECM, which monitors, adapts and fine-tunes fuel injection. The ECM uses input signals from various sensors and precisely controls the actuators to ensure optimum dynamic performance under all driving conditions.

The ECM controls the fuel supply to all four cylinders through a common rail injection system. The common rail system uses a fuel rail to store high pressure fuel and feed four electronically controlled injectors. The fuel manifold is located close to the injectors to help maintain full system pressure at each injector at all times.

The ECM uses the control-by-wire principle for acceleration control. The command is transmitted from the accelerator pedal to the ECM by two potentiometers located in the throttle position sensor. The ECM uses two signals to determine the position, amount of motion, and direction of the pedal. The ECM then uses this data, along with other engine information from other sensors, to achieve optimal engine response.

The ECM processes the following incoming information: