Oxygen sensor JAGUAR XFR 2010 1.G Workshop Manual

Catalyst Monitor Sensor RH
Crankshaft Position (CKP) Sensor
Engine Control Module (ECM)
Engine Coolant Temperature (ECT) Sensor
Engine Oil Level Sensor
Front Knock Sensor (KS) LH
Front Knock Sensor (KS) RH
Fuel Rail Pressure (FRP) Sensor
Heated Oxygen Sensor (HO2S) LH
Heated Oxygen Sensor (HO2S) RH
Manifold Absolute Pressure (MAP) Sensor
Mass Air Flow (MAF) Sensor
Rear Knock Sensor (KS) LH
Rear Knock Sensor (KS) RH
Variable Valve Timing (VVT) Oil Control Solenoid LH
Variable Valve Timing (VVT) Oil Control Solenoid RH307: Automatic Transmission/Transaxle
307-01B: Automatic Transmission/Transaxle - TDV6 3.0L Diesel /V8 5.0L Petrol/V8 S/C 5.0L
PetrolSpecificationDescription and OperationComponent Location
Overview
System Operation and Component DescriptionDiagnosis and TestingDiagnosticsGeneral ProceduresTransmission Fluid Level Check
Transmission Fluid Drain and RefillRemoval and InstallationInput Shaft Seal
Extension Housing Seal
Transmission Control Module (TCM) and Main Control Valve Body
Transmission Fluid Pan, Gasket and Filter
Transmission Support Insulator - V8 5.0L Petrol/V8 S/C 5.0L Petrol
Transmission, Transmission Fluid Cooler and Transmission Fluid Cooler Tubes - V8 5.0L Petrol/V8
S/C 5.0L Petrol
Transmission and Transmission Fluid Cooler - V8 5.0L Petrol/V8 S/C 5.0L PetrolRemovalTransmission - V8 5.0L Petrol/V8 S/C 5.0L PetrolInstallationTransmission - V8 5.0L Petrol/V8 S/C 5.0L Petrol

Bus Topology of a
communication
network Coast Clutch Solenoid CCS Camshaft Position CMP Indicates camshaft position Carbon dioxide CO² Colorless gas with a density of approximately 1.5 times that of air Carbon monoxide CO Poisonous gas produced as the result of incomplete combustion Chlorofluorocarbon CFC Catalytic converter
In-line exhaust system device used to reduce the level of engine exhaust
emissions Celsius C
SI term for the Centigrade scale, with freezing point at zero and boiling point at 100 degrees Compact Disc CD Cylinder Head Temperature
Sensor CHT Sensor A sensor for measuring the temperature of the cylinder head Central Junction Box CJB Crankshaft Position CKP Indicates crankshaft position Clutch Pedal Position CPP Indicates clutch pedal position Controller Area Network CAN
A communication system which allows control modules to be linked together Constant Velocity CV Cubic centimeter cm³ Central Security Module CSM Electronic module to support security system functionality Data Link Connector DLC
Connector providing access and/or control of the vehicle information, operating conditions, and diagnostic information Driver Door Module DDM Electronic module to support driver door functionality Driver Seat Module DSM Electronic module to support driver seat functionality Daytime Running Lamps DRL Deutsche Institut fur Normung DIN German standards regulation body Diagnostic Trouble Code DTC
An alpha/numeric identifier for a fault condition identified by the On-Board Diagnostic (OBD) system Direct current dc
Current which flows in one direction only, though it may have appreciable pulsations in its magnitude Domestic Data Bus D2B Digital Versatile Disc DVD Electronic Automatic Temperature Control EATC
Exhaust Gas Recirculation EGR Exhaust Gas Recirculation Temperature Sensor EGRT Sensing EGR function based on temperature change Electronic Brake Force
Distribution EBD
Engine Control Module ECM Electronic module to support engine functionality Electronic Crash Sensor ECS Sensor to measure severity of impact Engine Coolant Temperature ECT Engine Oil Pressure EOP European On-Board Diagnostic EOBD Electronic Pressure Control EPC Electrically Erasable
Programmable Read-Only Memory EEPROM
Erasable Programmable
Read-Only Memory EPROM
Evaporative Emission EVAP
System designed to prevent fuel vapor from escaping into the atmosphere. Typically includes a charcoal filled canister to absorb fuel vapor Flash Electrically Erasable
Programmable Read-Only Memory FEEPROM
Front Electronic Module FEM Flash Erasable Programmable
Read-Only Memory FEPROM
Frequency Modulation FM Fuel Pump Driver Module FPDM Fuel Rail Pressure FRP Generic Electronic Module GEM Ground GND
Electrical conductor used as a common return for an electrical circuit or
circuits, and with a relative zero potential Global Positioning System GPS Global System for Mobile
Communication GSM
Gross Vehicle Weight GVW Heated Oxygen Sensor HO2S Electrically heated oxygen sensor which induces fuelling corrections

Hydrofluorocarbon HFC High tension HT Hydrocarbon HC Idle Air Control IAC
Stepper motor driven device which varies the volume of air by-passing the
throttle to maintain the programmed idle speed Intake Air Temperature IAT Temperature of intake air Inertia Fuel Shut-off IFS
An inertia system that shuts off the fuel supply when activated by pre-determined force limits brought about by (e.g.) collision Input Shaft Speed ISS Indicates input shaft speed Key On, Engine Off KOEO Key On, Engine Running KOER Kilogram (mass) kg Kilogram (force) kgf Kilogram force per square
centimeter kgf/cm²
Kilometer km Kilometer per hour km/h Kilopascal kPa Kilovolt kV Knock Sensor KS
Sensor which detects the onset of detonation, and signals the ECM to
retard the ignition Liquid Crystal Display LCD
Optical digital display system, to which applied voltage varies the way the crystals reflect light, thereby modifying the display Lighting Control Module LCM Light Emitting Diode LED Low Tension LT
Primary circuit of the ignition system, linking the battery to the primary winding in the ignition coil Left-Hand LH Left-Hand Drive LHD Mass Air Flow MAF
System which provides information on the mass flow rate of the intake air
to the engine Manifold Absolute Pressure MAP Absolute pressure of the intake manifold air Manifold Absolute Pressure and Temperature MAPT
Malfunction Indicator Lamp MIL
A required on-board indicator to alert the driver of an emission related
malfunction Meter (measurement) m Metric (screw thread, e.g. M8) M Farad F Unit of electrical capacitance Millimeter mm Millimeter of mercury mmHg Millisecond ms Model year MY Newton N SI unit of force. 1 N = 0.2248 pounds force Newton Meter Nm SI unit of torque. Must not be confused with nm (nanometer) Negative Temperature
Coefficient NTC
Naturally aspirated N/A
Fuelling system using intake air at atmospheric pressure; not supercharged or turbocharged Noise, Vibration and Harshness NVH North American Specification NAS Vehicles for sale in the USA and Canadian markets On-Board Diagnostic OBD
A system that monitors some or all computer input and output control
signals. Signal(s) outside the pre-determined limits imply a fault in the system or a related system Oxides of Nitrogen Nox Oxygen Sensor O2S A sensor which detects oxygen content in the exhaust gases On-board Refuelling Vapour Recovery ORVR
Output State Control OSC Output Shaft Speed OSS Passenger Air Bag Deactivation PAD Pulsed Secondary Air Injection PAIR Passive Anti-Theft System PATS Positive Crankcase Ventilation PCV Parameter Identification PID
An index number referring to a parameter within a module without knowledge of its storage location Park/Neutral Position PNP Pulse Width Modulation PWM Programmable Electronic
Control Units System PECUS
Process whereby a common ECM is programmed on the production line to
suit the market requirements of a particular vehicle

DTC Description Possible Causes Action Intake valve solenoid 1 stuck
advanced a new module/component P0027-72
Exhaust Valve Control
Solenoid Circuit
Range/Performance (Bank 1)
- Actuator stuck open
NOTE: - Circuit VFS_EX_A -

Exhaust valve solenoid 1 angle
less than target
Exhaust valve solenoid 1 slow or
not operating
Check operation of exhaust valve
solenoid 1. Check and install a new
exhaust valve solenoid 1 as
required. Refer to the warranty policy
and procedures manual, or determine
if any prior approval programme is in
operation, prior to the installation of
a new module/component P0027-77
Exhaust Valve Control
Solenoid Circuit
Range/Performance (Bank 1)
- Commanded position not
reachable
NOTE: - Circuit VFS_EX_A -

Exhaust valve solenoid 1 angle
greater than target
Exhaust valve solenoid 1 not
returning to target in time
Exhaust valve solenoid 1 stuck
advanced
Check operation of exhaust valve
solenoid 1. Check and install a new
exhaust valve solenoid 1 as
required. Refer to the warranty policy
and procedures manual, or determine
if any prior approval programme is in
operation, prior to the installation of
a new module/component P0028-72
Intake Valve Control
Solenoid Circuit
Range/Performance (Bank 2)
- Actuator stuck open
NOTE: - Circuit VFS_IN_B -

Intake valve solenoid 2 angle less
than target
Intake valve solenoid 2 slow or not
operating
Check operation of intake valve
solenoid 2. Check and install a new
intake valve solenoid 2 as required.
Refer to the warranty policy and
procedures manual, or determine if
any prior approval programme is in
operation, prior to the installation of
a new module/component P0028-77
Intake Valve Control
Solenoid Circuit
Range/Performance (Bank 2)
- Commanded position not
reachable
NOTE: - Circuit VFS_IN_B -

Intake valve solenoid 2 angle
greater than target
Intake valve solenoid 2 not
returning to target in time
Intake valve solenoid 2 stuck
advanced
Check operation of intake valve
solenoid 2. Check and install a new
intake valve solenoid 2 as required.
Refer to the warranty policy and
procedures manual, or determine if
any prior approval programme is in
operation, prior to the installation of
a new module/component P0029-72
Exhaust Valve Control
Solenoid Circuit
Range/Performance (Bank 2)
- Actuator stuck open
NOTE: - Circuit VFS_EX_B -

Exhaust valve solenoid 2 angle
less than target
Exhaust valve solenoid 2 slow or
not operating
Check operation of exhaust valve
solenoid 2. Check and install a new
exhaust valve solenoid 2 as
required. Refer to the warranty policy
and procedures manual, or determine
if any prior approval programme is in
operation, prior to the installation of
a new module/component P0029-77
Exhaust Valve Control
Solenoid Circuit
Range/Performance (Bank 2)
- Commanded position not
reachable
NOTE: - Circuit VFS_EX_B -

Exhaust valve solenoid 2 angle
greater than target
Exhaust valve solenoid 2 not
returning to target in time
Exhaust valve solenoid 2 stuck
advanced
Check operation of exhaust valve
solenoid 2. Check and install a new
exhaust valve solenoid 2 as
required. Refer to the warranty policy
and procedures manual, or determine
if any prior approval programme is in
operation, prior to the installation of
a new module/component P0031-11
HO2S Heater Control Circuit
Low (Bank 1, Sensor 1) -
Circuit short to ground NOTES:


- Circuit HTR_CTRL_A_UPSTREAM -


LR - Circuit UHEGO HEATER A -

Pre catalyst oxygen sensor-odd
heater control circuit (Bank 1,
Sensor 1) circuit short circuit to
ground
Using the manufacturer approved
diagnostic system check datalogger
signal, Oxygen Sensor (O2S) Heater
Duty Cycle Bank 1 Sensor 1 (0x03A1)
Refer to the electrical circuit
diagrams and check pre catalyst
oxygen sensor-odd heater control
circuit (Bank 1, Sensor 1) circuit for
short circuit to ground

DTC Description Possible Causes Action P0031-13
HO2S Heater Control Circuit
Low (Bank 1, Sensor 1) -
Circuit open NOTES:


- Circuit HTR_CTRL_A_UPSTREAM -


LR - Circuit UHEGO HEATER A -

Pre catalyst oxygen sensor-odd
heater control circuit (Bank 1,
Sensor 1) circuit, open circuit
Using the manufacturer approved
diagnostic system check datalogger
signal, Oxygen Sensor (O2S) Heater
Duty Cycle Bank 1 Sensor 1 (0x03A1)
Refer to the electrical circuit
diagrams and check pre catalyst
oxygen sensor-odd heater control
circuit (Bank 1, Sensor 1) circuit for
open circuit P0032-12
HO2S Heater Control Circuit
High (Bank 1, Sensor 1) -
Circuit short to battery NOTES:


- Circuit HTR_CTRL_A_UPSTREAM -


LR - Circuit UHEGO HEATER A -

Pre catalyst oxygen sensor-odd
heater control circuit (Bank 1,
Sensor 1) circuit short circuit to
power
Using the manufacturer approved
diagnostic system check datalogger
signal, Oxygen Sensor (O2S) Heater
Duty Cycle Bank 1 Sensor 1 (0x03A1)
Refer to the electrical circuit
diagrams and check pre catalyst
oxygen sensor-odd heater control
circuit (Bank 1, Sensor 1) circuit for
short circuit to power P0036-00
HO2S Heater Control Circuit
(Bank 1, Sensor 2) - No sub
type information
NOTE: - Circuit HTR_HEGO_A -

Catalyst oxygen sensor heater
circuit control fuse failure
Post catalyst oxygen sensor-odd
heater control circuit short circuit
to ground, short circuit to power,
open circuit
Catalyst oxygen sensor heater
circuit control relay circuit short
circuit to ground, short circuit to
power, open circuit
Catalyst oxygen sensor heater
circuit control relay failure
Post catalyst oxygen sensor-odd
failure
Using the manufacturer approved
diagnostic system check datalogger
signal, Oxygen Sensor (O2S) Heater
Duty Cycle Bank 1 Sensor 2 (0x03A2)
Refer to the electrical circuit
diagrams and check post catalyst
oxygen sensor-odd sensor fuse for
open circuit
Refer to the electrical circuit
diagrams and check post catalyst
oxygen sensor-odd sensor circuit for
short circuit to ground, short circuit
to power, open circuit
Refer to the electrical circuit
diagrams and check catalyst oxygen
sensor heater circuit control relay
circuit for short circuit to ground,
short circuit to power, open circuit
Check and install a new catalyst
oxygen sensor heater control relay,
as required. Check and install a new
post catalyst oxygen sensor-odd as
required. Refer to the warranty policy
and procedures manual, or determine
if any prior approval programme is in
operation, prior to the installation of
a new module/component P0051-11
HO2S Heater Control Circuit
Low (Bank 2, Sensor 1) -
Circuit short to ground NOTES:


- Circuit HTR_CTRL_B_UPSTREAM -


LR - Circuit UHEGO HEATER B -

Pre catalyst oxygen sensor-even
heater control circuit (Bank 2,
Sensor 1) circuit short circuit to
ground
Using the manufacturer approved
diagnostic system check datalogger
signal, Oxygen Sensor (O2S) Heater
Duty Cycle Bank 2 Sensor 1 (0x03A4)
Refer to the electrical circuit
diagrams and check pre catalyst
oxygen sensor-even heater control
circuit (Bank 2, Sensor 1) circuit for
short circuit to ground P0051-13
HO2S Heater Control Circuit
Low (Bank 2, Sensor 1) -
Circuit open NOTES:


- Circuit HTR_CTRL_B_UPSTREAM -


LR - Circuit UHEGO HEATER B -
Using the manufacturer approved
diagnostic system check datalogger
signal, Oxygen Sensor (O2S) Heater
Duty Cycle Bank 2 Sensor 1 (0x03A4)
Refer to the electrical circuit
diagrams and check pre catalyst
oxygen sensor-even heater control
circuit (Bank 2, Sensor 1) circuit for

DTC Description Possible Causes Action
Pre catalyst oxygen sensor-even
heater control circuit (Bank 2,
Sensor 1) circuit, open circuit open circuit P0052-12
HO2S Heater Control Circuit
High (Bank 2, Sensor 1) -
Circuit short to battery NOTES:


- Circuit HTR_CTRL_B_UPSTREAM -


LR - Circuit UHEGO HEATER B -

Pre catalyst oxygen sensor-even
heater control circuit (Bank 2,
Sensor 1) circuit short circuit to
power
Using the manufacturer approved
diagnostic system check datalogger
signal, Oxygen Sensor (O2S) Heater
Duty Cycle Bank 2 Sensor 1 (0x03A4)
Refer to the electrical circuit
diagrams and check pre catalyst
oxygen sensor-even heater control
circuit (Bank 2, Sensor 1) circuit for
short circuit to power P0054-00
HO2S Heater Resistance
(Bank 1, Sensor 2) - No sub
type information NOTES:


- Circuit HTR_CTRL_A_UPSTREAM -


LR - Circuit UHEGO HEATER A -

Catalyst oxygen sensor heater
circuit control fuse failure
Post catalyst oxygen sensor-odd
heater control circuit short circuit
to ground, short circuit to power,
open circuit, high resistance
Catalyst oxygen sensor heater
circuit control relay circuit short
circuit to ground, short circuit to
power, open circuit
Catalyst oxygen sensor heater
circuit control relay failure
Post catalyst oxygen sensor-odd
failure
Using the manufacturer approved
diagnostic system check datalogger
signal, Oxygen Sensor (O2S) Heater
Duty Cycle Bank 1 Sensor 1 (0x03A1)
Refer to the electrical circuit
diagrams and check post catalyst
oxygen sensor-odd sensor fuse for
open circuit
Refer to the electrical circuit
diagrams and check post catalyst
oxygen sensor-odd sensor circuit for
short circuit to ground, short circuit
to power, open circuit, high
resistance
Refer to the electrical circuit
diagrams and check catalyst oxygen
sensor heater circuit control relay
circuit for short circuit to ground,
short circuit to power, open circuit
Check and install a new catalyst
oxygen sensor heater control relay,
as required. Check and install a new
post catalyst oxygen sensor-odd as
required. Refer to the warranty policy
and procedures manual, or determine
if any prior approval programme is in
operation, prior to the installation of
a new module/component P0056-00
HO2S Heater Control Circuit
(Bank 2, Sensor 2) - No sub
type information
NOTE: - Circuit HTR_HEGO_B -

Post catalyst oxygen sensor-even
heater control circuit short circuit
to ground, short circuit to power,
open circuit
Catalyst oxygen sensor heater
circuit control relay circuit short
circuit to ground, short circuit to
power, open circuit
Catalyst oxygen sensor heater
circuit control relay failure
Post catalyst oxygen sensor-even
failure
Using the manufacturer approved
diagnostic system check datalogger
signal, Oxygen Sensor (O2S) Heater
Duty Cycle Bank 2 Sensor 2 (0x03A5)
Refer to the electrical circuit
diagrams and check post catalyst
oxygen sensor-even sensor circuit for
short circuit to ground, short circuit
to power, open circuit
Refer to the electrical circuit
diagrams and check catalyst oxygen
sensor heater circuit control relay
circuit for short circuit to ground,
short circuit to power, open circuit
Check and install a new catalyst
oxygen sensor heater control relay,
as required. Check and install a new
post catalyst oxygen sensor-even, as
required. Refer to the warranty policy
and procedures manual, or determine
if any prior approval programme is in
operation, prior to the installation of
a new module/component P0060-00
HO2S Heater Resistance
(Bank 2, Sensor 2) - No sub
type information NOTES:


- Circuit HTR_CTRL_B_UPSTREAM -
Using the manufacturer approved
diagnostic system check datalogger
signal, Oxygen Sensor (O2S) Heater
Duty Cycle Bank 2 Sensor 2 (0x03A5)

DTC Description Possible Causes Action
LR - Circuit UHEGO HEATER B -

Catalyst oxygen sensor heater
circuit control fuse failure
Post catalyst oxygen sensor-even
heater control circuit short circuit
to ground, short circuit to power,
open circuit, high resistance
Catalyst oxygen sensor heater
circuit control relay circuit short
circuit to ground, short circuit to
power, open circuit
Catalyst oxygen sensor heater
circuit control relay failure
Post catalyst oxygen sensor-even
failure Refer to the electrical circuit
diagrams and check post catalyst
oxygen sensor-even sensor fuse for
open circuit
Refer to the electrical circuit
diagrams and check post catalyst
oxygen sensor-even sensor circuit for
short circuit to ground, short circuit
to power, open circuit, high
resistance
Refer to the electrical circuit
diagrams and check catalyst oxygen
sensor heater circuit control relay
circuit for short circuit to ground,
short circuit to power, open circuit
Check and install a new catalyst
oxygen sensor heater control relay,
as required. Check and install a new
post catalyst oxygen sensor-even as
required. Refer to the warranty policy
and procedures manual, or determine
if any prior approval programme is in
operation, prior to the installation of
a new module/component P0069-29
MAP - Barometric Pressure
Correlation - Signal invalid
Manifold absolute pressure sensor
failure
Engine control module failure
Using the manufacturer approved
diagnostic system check datalogger
signal, Barometric Pressure Sensor
Voltage (0x035A). Check for related
manifold absolute pressure sensor
DTCs
Refer to the electrical circuit
diagrams and check manifold
absolute pressure sensor circuit for
short circuit to ground, short circuit
to power, open circuit
Check and install new manifold
absolute pressure sensor as
required. Check and install a new
engine control module as required.
Refer to the warranty policy and
procedures manual, or determine if
any prior approval programme is in
operation, prior to the installation of
a new module/component P0071-21
Ambient Air Temperature
Sensor Range/Performance -
Signal amplitude < minimum NOTES:


Jaguar - Circuit
AMBIENT_TEMP_SENSOR -


LR - Circuit TAMB TEMP -

Ambient air temperature sensor
circuit short circuit to ground, short
circuit to power, open circuit
Temperature and manifold absolute
pressure sensor circuit short circuit
to ground, short circuit to power,
open circuit
Ambient air temperature sensor
failure
Temperature and manifold absolute
pressure sensor failure
Using the manufacturer approved
diagnostic system check datalogger
signal, Ambient Air Temperature
Sensor Voltage (0x03BA)
Refer to the electrical circuit
diagrams and check ambient air
temperature sensor circuit for short
circuit to ground, short circuit to
power, open circuit
Refer to the electrical circuit
diagrams and check temperature and
manifold absolute pressure sensor
circuit for short circuit to ground,
short circuit to power, open circuit
Check and install a new ambient air
temperature sensor as required.
Check and install a new temperature
and manifold absolute pressure
sensor as required. Refer to the
warranty policy and procedures
manual, or determine if any prior
approval programme is in operation,
prior to the installation of a new
module/component P0071-22
Ambient Air Temperature
Sensor Range/Performance -
Signal amplitude > maximum NOTES:


- Circuit AMBIENT_TEMP_SENSOR -
Using the manufacturer approved
diagnostic system check datalogger
signal, Ambient Air Temperature
Sensor Voltage (0x03BA)
Refer to the electrical circuit www.JagDocs.com

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) (KS) retaining bolt 20 15 - Fuel rail pressure (FRP) sensor 32 24 - Manifold absolute pressure and temperature (MAPT) sensor 5 - 44 Engine oil level sensor retaining bolts 11 8 - Variable valve timing (VVT) oil control solenoid(s) retaining bolts 10 7 - Engine control module (ECM) retaining bolts 7 - 62 ECM retaining bracket bolts 7 - 62

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)

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.