crankshaft JAGUAR XF 2009 1.G AJ133 5.0L Engine Manual
[x] Cancel search | Manufacturer: JAGUAR, Model Year: 2009, Model line: XF, Model: JAGUAR XF 2009 1.GPages: 36, PDF Size: 0.38 MB
Page 3 of 36
Technical Training
NP10-V8JLR: AJ133 5.0-Liter DFI V8 Engine 04/14/2009
3-1
Engine Management System
Table of Contents
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Engine Control Module . . . . . . . . . . . . . . . . . . . . . . 8
Relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Crankshaft Position Sensor . . . . . . . . . . . . . . . . . . 11
Camshaft Position Sensor . . . . . . . . . . . . . . . . . . . 13
Engine Coolant Temperature Sensor . . . . . . . . . . 14
Knock Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Manifold Absolute Pressure Sensor . . . . . . . . . . . 16
Mass Air Flow Sensor . . . . . . . . . . . . . . . . . . . . . . 17
Temp. / Manifold Absolute Pressure Sensor . . . . 18
Throttle Position Sensor . . . . . . . . . . . . . . . . . . . . 19
Accelerator Pedal Position Sensor . . . . . . . . . . . . 21
Heated Oxygen Sensors . . . . . . . . . . . . . . . . . . . . 22
Ambient Air Temperature Sensor. . . . . . . . . . . . . 26
Ignition Coils . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Fuel Tank Canister Purge Valve . . . . . . . . . . . . . . 28
Viscous Fan Control (Land Rover only) . . . . . . . 29
Controller Area Network. . . . . . . . . . . . . . . . . . . . 30
On-Board Diagnostic Monitoring . . . . . . . . . . . . . 31
Crankcase Ventilation System . . . . . . . . . . . . . . . 32
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04/14/2009 NP10-V8JLR: AJ133 5.0-Liter DFI V8 Engine
Technical Training
Engine Control Module
Engine Management System
ENGINE CONTROL MODULE
The ECM is supplied with battery voltage from a 5A fuse and an ignition supply from the ECM relays through\
a 15A
fuse, both located in the CJB. A regulator located within the ECM supplies a 5V current to internal compone\
nts such
as the microprocessor unit. Other components or functions requiring full\
battery voltage are controlled by external
relays or internal switching modules.
The microprocessor within the ECM receives signals from different components and control modules and uses a pro-
gram within the ECM software to interpret the signal information and issue signals which relate t\
o how the engine
components and functions should be controlled. The ECM communicates with other control modules via bidirectional
Controller Area Network (CAN) communication interfaces.
The ECM uses the following inputs and outputs:
Inputs
• Camshaft position (CMP) sensor
• Crankshaft position (CKP) sensor
• Fuel rail high-pressure sensor
• Mass air flow (MAF) sensors (2)
• Knock sensors (4)
• Engine coolant temperature (ECT) sensor
• Manifold absolute pressure (MAP) sensor
• Electronic throttle position sensor
• Accelerator pedal position (APP) sensor
• Cooling fan speed
• Upstream Universal Heated Exhaust Gas Oxygen (UHEGO) sensors (2)
• Brake switch
• Speed control cancel/suspend switch
• Intake air temperature (IAT) sensor (integrated into the MAF) (2)
• Ambient air temperature (AAT) sensor
• Engine oil level and temperature sensor
• Temperature and manifold absolute pressure (TMAP) sensor (SC only)
Outputs
• Throttle Actuator
• Coil-on-plug (COP) ignition coils (8)
• Upstream Universal Heated Exhaust Gas Oxygen (UHEGO) sensors (2)
• Downstream Heated Oxygen Sensors (HO2S) (2)
• Direct injection fuel injectors (8)
• Variable camshaft timing (VCT) solenoids (4)
• Camshaft profile switching (CPS) solenoids (2)
• Intake manifold tuning solenoid
• Carbon canister purge valve
• Fuel pump relay
• Starter relay
• A/C condenser fan relay
• ECM main relay viscous fan control
• Generator control
• Air flap solenoid (SC only)
• Pump control diagnostics
• Diagnostic Monitoring of Tank Leakage (DMTL)
Page 13 of 36
Technical Training
NP10-V8JLR: AJ133 5.0-Liter DFI V8 Engine 04/14/2009
3-11
Engine Management System
Crankshaft Position Sensor
CRANKSHAFT POSITION SENSOR
The crankshaft position (CKP) sensor is located on the
forward side of the transmission torque converter hous-
ing, in line with the engine flexplate.
The sensor is secured with a single bolt into the flywheel
housing. A reluctor ring is fitted to the outer diameter of
the crankshaft flexplate; the sensor reacts to the gaps in
the reluctor ring to determine engine speed and position
information.
The CKP sensor is an inductive-type sensor which pro-
duces a sinusoidal output voltage signal. This voltage is
induced by the proximity of the moving reluctor ring
gaps, which excite the magnetic flux around the tip of
the sensor when each gap passes.
The output voltage increases in magnitude and fre-
quency with the engine speed and, consequently, with
the speed at which the reluctor ring gaps pass the sensor.
NOTE:
The output is also dependent on the air gap
between the sensor and the teeth (the larger the gap, the
weaker the signal, the lower the output voltage).
DIRECTION OF ROTATION
FLEXPLATE
RELUCTOR
VOLTAGE OUTPUT S IGNAL
NP10V8094
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04/14/2009 NP10-V8JLR: AJ133 5.0-Liter DFI V8 Engine
Technical Training
Crankshaft Position Sensor
Engine Management System
The reluctor is manufactured to have a ‘tooth’ pattern
based on 60 – 2 pattern, where there are 58 teeth in total
at 6° intervals. The two teeth are removed to provide a
hardware reference mark, with a centerline that is 21°
BTDC on cylinder 1, RH bank. The signal voltage can be as low as 0.1V at low engine
speeds and up to 100V at high engine speeds. The ECM
does not react to the output voltage (unless the voltage is
extremely low or high); instead it measures the time
intervals between each pulse (signal frequency).
Safety Precautions CAUTIONS:
• Before installing the CKP sensor, check that no ferrous material has been attracted to
the device by its internal magnet.
• Ensure that the air gap is correct.
• Due to the location and orientation of the sensor, ensure that it is not damaged during
engine installation or by any debris that
may be picked up from the road. Failure Modes
• Sensor assembly loose
• Incorrect air gap – Nominal air gap 1.5mm (This is normally pre-set unless there is damage to the
mounting)
• Short/open circuit
• Mounting and integrity of the sensor
• Water/coolant ingress within connector
• Inability of the ECM to detect the software reference point
• Ferrous contamination of CKP sensor pin/reluctor
Failure Symptoms
• Engine will start picking up a signal from the CMP sensors (long crank time)
• Default 3000rpm (limp home mode)
REFERENCE EDGE
S
ENS OR OUTPUT
ECM INTERNAL
COMPARATOR OUTPUT 0V
MISSING TEETH
NP10V8095
Page 15 of 36
Technical Training
NP10-V8JLR: AJ133 5.0-Liter DFI V8 Engine 04/14/2009
3-13
Engine Management System
Camshaft Position Sensor
CAMSHAFT POSITION SENSOR
The camshaft position (CMP) sensors are magneto-
resistive element (MRE) sensors, which have digital out-
put with zero speed recognition. They show a high signal
if the camshaft position target is directly in front of the
sensor, and low if the camshaft position target is not in
front of the sensor.
There are four common sensors, one per camshaft.
Failure Modes
• Sensor open circuit
• Short circuit to vehicle battery supply or ground
• Mechanical fitting and integrity of the sensor
• Camshaft wheel tolerances/camshaft end float excessive
• Camshaft and crankshaft misalignment/valve timing error
• Camshaft wheel magnetized/residual magnetism
• Speed signal correlation with crankshaft sensor input
• Incorrect air gap between camshaft and sensor
NOTE:
If both the CKP sensor and the CMP sensor fail,
the engine will stall or not start.
Failure Symptoms
• Ignition timing reverting to the base mapping, with no cylinder correction
• VCT is disabled
NP10V8096
NP10V8097
NP10V8098
43.40°43.40°43.40° 91.60°
91.60°
133.40°133.40°
91.60°
133.40°
91.60°
91.60°91.60°
Specification
Function
Pin 1 Supply
Pin 2 Ground
Pin 3 Signal
Operating voltage 4.5 to 7 V
Maximum supply current 22 mA