2010 JAGUAR XFR Workshop Manual

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Page 1353 of 3039

JAGUAR XFR 2010 1.G Workshop Manual Camshaft position (CMP) sensor(s) retaining bolt 10 7 - Crankshaft position (CKP) sensor retaining bolt 10 7 - Heated oxygen sensor(s) (HO2S) 48 35 - Catalyst monitor sensor(s) 48 35 - Knock sensor(s)

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JAGUAR XFR 2010 1.G Workshop Manual 1 MAFT (mass air flow and temperature) sensor 2 MAP (manifold absolute pressure) sensor 3 Knock sensors 4 CKP (crankshaft position) sensor 5 MAFT sensor 6 CMP (camshaft position) sensors 7 ECT (engine

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JAGUAR XFR 2010 1.G Workshop Manual 1 MAPT (manifold absolute pressure and temperature) sensor 2 ECT sensor (ECT 1) 3 Upstream HO2S (heated oxygen sensor) 4 Downstream HO2S 5 Downstream HO2S 6 Upstream HO2S 7 ECM (engine control module)

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JAGUAR XFR 2010 1.G Workshop Manual 1 AAT (ambient air temperature) sensor 2 APP (accelerator pedal position) sensor COMPONENT LOCATION - SHEET 3 OF 3
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JAGUAR XFR 2010 1.G Workshop Manual Published: 11-May-2011
Electronic Engine Controls - V8 S/C 5.0L Petrol - Electronic Engine Controls - Overview
Description and Operation

OVERVIEW

The EEC (electronic engine control) system ope

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JAGUAR XFR 2010 1.G Workshop Manual Published: 11-May-2011
Electronic Engine Controls - V8 S/C 5.0L Petrol - Electronic Engine Controls - System Operation and Component Description
Description and Operation

Control Diagram

NOTE:

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JAGUAR XFR 2010 1.G Workshop Manual 6 LH exhaust CMP sensor 7 LH MAFT sensor 8 LH front knock sensor 9 LH rear knock sensor 10 RH (right hand) rear knock sensor 11 RH front knock sensor 12 RH intake CMP sensor 13 RH exhaust CMP sensor 1

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JAGUAR XFR 2010 1.G Workshop Manual 4 Diagnostic socket 5 To other system control modules 6 ECM 7 Electronic throttle 8 APP sensor 9 AAT sensor 10 ECT sensor (ECT 1) 11 LH upstream HO2S 12 LH downstream HO2S 13 MAPT (manifold absolute p

4 Diagnostic socket 5 To other system control modules 6 ECM 7 Electronic throttle 8 APP sensor 9 AAT sensor 10 ECT sensor (ECT 1) 11 LH upstream HO2S 12 LH downstream HO2S 13 MAPT (manifold absolute pressure and temperature) sensor 14 RH downstream HO2S 15 RH upstream HO2S

ECM ADAPTIONS System Operation

The ECM (engine control module) has the ability to adapt the input values it uses to control certain outputs. This capability
maintains engine refinement and ensures the engine emissions remain within the legislated limits. The components which
have adaptions associated with them are:

The APP (accelerator pedal position) sensor
The heated oxygen sensors
The MAFT (mass air flow and temperature) sensors
The CKP (crankshaft position) sensor
Electronic throttle.

OXYGEN AND MAFT SENSORS

There are several adaptive maps associated with the fueling strategy. Within the fueling strategy the ECM calculates short-term adaptions and long term adaptions. The ECM will monitor the deterioration of the heated oxygen sensors over a period of time. It will also monitor the current correction associated with the sensors.

The ECM will store a fault code in circumstances where an adaption is forced to exceed its operating parameters. At the same time, the ECM will record the engine speed, engine load and intake air temperature.
CRANKSHAFT POSITION SENSOR

The characteristics of the signal supplied by the CKP sensor are learned by the ECM. This enables the ECM to set an adaption and support the engine misfire detection function. Due to the small variation between different drive plates and different CKP sensors, the adaption must be reset if either component is renewed, or removed and refitted. It is also necessary to reset the
drive plate adaption if the ECM is renewed or replaced. The ECM supports four drive plate adaptions for the CKP sensor. Each adaption relates to a specific engine speed range. The engine speed ranges are detailed in the table below:

Adaption Engine Speed, rev/min 1 1800 - 3000 2 3001 - 3800 3 3801 - 4600 4 4601 - 5400 MISFIRE DETECTION

Legislation requires that the ECM must be able to detect the presence of an engine misfire. It must be able to detect misfires at two separate levels. The first level is a misfire that could lead to the legislated emissions limit being exceeded by a given
amount. The second level is a misfire that may cause catalytic converter damage.

The ECM monitors the number of misfire occurrences within two engine speed ranges. If the ECM detects more than a predetermined number of misfire occurrences within either of these two ranges, over two consecutive journeys, it will record a
fault code and details of the engine speed, engine load and engine coolant temperature. In addition, the ECM monitors the number of misfire occurrences that happen in a 'window' of 200 engine revolutions. The misfire occurrences are assigned a
weighting according to their likely impact on the catalytic converters. If the number of misfires exceeds a given value, the ECM stores catalytic converter damage fault codes, along with the engine speed, engine load and engine coolant temperature.

The signal from the CKP sensor indicates how fast the poles on the drive plate are passing the sensor tip. A sine wave is generated each time a pole passes the sensor tip. The ECM can detect variations in drive plate speed by monitoring the sine wave signal supplied by the crankshaft position sensor. By assessing this signal, the ECM can detect the presence of an engine misfire. At this time, the ECM will assess the amount of variation in the signal received from the CKP sensor and assign a roughness value to it. This roughness value can be viewed within the real time monitoring feature using Jaguar approved
diagnostic equipment. TheECM will evaluate the signal against a number of factors and will decide whether to record the occurrence or ignore it. The ECM can assign a roughness and misfire signal for each cylinder.

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