Jaguar X-Type Sedan and Estate (Wagon). Service manual — part 320

Item

Part Number

Description

1

—

Intake Manifold Tuning (IMT) Valve - upper

2

—

Intake Manifold Tuning (IMT) Valve - lower

3

—

Engine Coolant Temperature (ECT) Sensor

4

—

Variable Camshaft Timing Oil Control Solenoid LH

5

—

Camshaft Position (CMP) Sensor LH

6

—

Camshaft Position (CMP) Sensor RH

7

—

Variable Camshaft Timing Oil Control Solenoid RH

8

—

Crankshaft Position (CKP) Sensor

2.0L, 2.5L and 3.0L Engine

Item

Part Number

Description

1

—

Knock Sensor (KS)

2

—

Throttle Position (TP) Sensor

3

—

Oil Temperature Sensor

4

—

Oil Pressure Switch

Item

Part Number

Description

1

—

Heated Oxygen Sensor (HO2S) LH

2

—

Catalyst Monitor Sensor RH

3

—

Heated Oxygen Sensor (HO2S) RH

4

—

Catalyst Monitor Sensor LH

Item

Part Number

Description

1

—

Mass Air flow (MAF) Sensor

Item

Part Number

Description

1

—

Engine Control Module (ECM)

Engine Control Module (ECM)

The electronic engine control system consists of a engine control module (ECM) and a number of sensing and actuating devices. The sensors
supply the ECM with input signals which relate to the engine operating conditions and driver requirements. The sensor information is
evaluated by the ECM using the results to activate the appropriate response from the actuating devices. The system provides the necessary
engine control accuracy and adaptability to:

Minimize exhaust emissions and fuel consumption.
Provide optimum driver control under all conditions.
Minimize evaporative emissions.
Provide system diagnostics.

In addition to these functions the ECM also interfaces with other vehicle systems through the controller area network (CAN).

Camshaft Position (CMP) Sensor

The camshaft position (CMP) sensors monitor the position of both camshafts to allow the ECM to control the phase of the inlet camshafts
relative to the position of the crankshaft.

Variable Camshaft Timing Oil Control Solenoid

The variable camshaft timing oil control solenoid is a hydraulic actuator, which advances and retards the inlet camshaft timing, thereby
altering the camshaft to crankshaft phasing for optimum engine performance.

Intake Manifold Tuning (IMT) Valve

There are two intake manifold tuning (IMT) valves, an upper and a lower, sometimes referred to as number one and two respectively. They
are a two position (open and close) device used to create a variable air intake system. The IMT valve positions are switched by signals from
the ECM to optimize torque across the engine's speed and load range. The IMT valves work in conjunction with the throttle body. The upper
IMT valve opens between 3,000 and 6,000 rpm while the lower IMT valve opens between 5,000 and 6,000 rpm.

Knock Sensor (KS)

The knock sensor (KS) detects combustion knock within the engine cylinders and sends a signal to the ECM. The ECM uses this information
to gradually adjust the ignition timing until the combustion knock is eliminated.

Mass Air flow (MAF) Sensor

The mass air flow (MAF) sensor informs the ECM of the rate of air flow entering the engine by producing a voltage which is proportional to
the rate of air flow into the engine. The voltage produced by the MAF sensor increases as the rate of air flow increases. The MAF sensor also
takes into account the density of the air entering the air intake system so that it is possible to maintain the required air to fuel ratio, and
to compensate for variations in atmospheric pressure.

Integral to the MAF sensor is the intake air temperature sensor (IAT) which measures the temperature of the air entering the air intake
system. The ECM uses this information to compensate for higher than normal air intake temperatures.

Throttle Position (TP) Sensor

The ECM monitors the angle of the throttle plate within the throttle housing through the throttle position (TP) sensor. The TP sends a
voltage to the ECM which is proportional to the angle of the throttle plate. The voltage from the TP increases with the angle of the throttle
plate. There are two sensor tracks within the TP sensor.

Crankshaft Position (CKP) Sensor

The crankshaft position (CKP) sensor is an inductive pulse generator, which scans protrusions on a pulse ring fitted to the front of the
crankshaft to inform the ECM of the crankshaft's position and speed. The CKP sensor produces an alternating voltage which is increases with