Land Rover Lesson 2 Auto Trans Coolingine Rover Manual

							4.4 Liter Electronic Engine Controls-Input Control Diagram (Sheet 1 of 2)
Main relay1
Camshaft sensor (CMP)2
Crankshaft position sensor (CKP)3
Engine Coolant Temperature sensor (ECT4
Electronic Engine ControlsLesson 2 – Powertrain
187Technical Training (G421151) 
						

							Accelerator Pedal Position sensor (APP)5
Manifold Absolute Pressure Sensor (APP)6
Engine oil temperature sensor7
Mass Air Flow/Inlet Air Temperature sensor
(MAF/IAT)
8
Fuel rail temperature sensor9
Restraints control module10
Brake light switch11
Clutch switch (Not used)12
Knock sensors13
ECM14
Fuse 60 P15
Fuse 25 P16
Ignition switch17
Fuseable link 11 E18
(G421151) Technical Training188
Lesson 2 – PowertrainElectronic Engine Controls 
						

							4.4 Liter Electronic Engine Controls-Control Diagram (Sheet 2 of 2)
NOTE: A= Hardwired D= CAN
Injectors1Engine cooling fan2
Electronic Engine ControlsLesson 2 – Powertrain
189Technical Training (G421151) 
						

							Variable Valve Timing (VVT) oil control
solenoids
3
ABS control module4
Instrument pack5
EAT control module6
Restraints control module7
Differential control module8
Transfer box control module9
Electric park brake control module10
ATC control module11
UHEGO12
Ignition coils13
HEGO14
Generator15
ECM16
EGR valve17
Clock spring18
Speed control switches19
Electric throttle20
GENERAL
The V8 4.4 Liter engine is controlled by a Engine
Control Module (ECM) manufactured by DENSO. The
Engine Management System (EMS) controls the
following:
•Engine fuelling
•Ignition timing
•Closed loop fuelling
•Knock control
•Idle speed control
•Emission control
•On Board Diagnostic
•Interface with the immobilisation system
•Speed control
The ECM controls the engine fuelling by providing
sequential fuel injection to all cylinders. Ignition is
controlled by a direct ignition system, provided by eight
plug top coils. The ECM is able to detect and correct
for ignition knock on each cylinder and adjust the
ignition timing for each cylinder to achieve optimum
performance.
The ECM uses a torque-based strategy to generate the
torque required by the driver and other vehicle ECUs.
The EMS uses various sensors to determine the torque
required from the engine. The EMS also interfaces with
other vehicle electronic control moduless, via the CAN
bus, to obtain additional information (e.g. road speed
from the ABS control module). The EMS processes
these signals and decides how much torque to generate.
Torque is then generated by using various actuators to
supply air, fuel and spark to the engine (electronic
throttle, injectors, coils, etc.).
ENGINE CONTROL MODULE (ECM)
The ECM is located in the E-Box in the plenum area on
the LH side of the engine compartment attached to the
bulkhead.
(G421151) Technical Training190
Lesson 2 – PowertrainElectronic Engine Controls 
						

							System ECM has the following inputs:
•Engine fuelling
•Ignition timing
•Closed loop fuelling
•Knock control
•Idle speed control
•Emission control
•On Board Diagnostic
•Interface with the immobilisation system
The ECM outputs to the following:
•Throttle Actuator
•Ignition coils (x8)
•Oxygen sensor heaters (4)
•Fuel injectors (8)
•EGR stepper motor
•Variable Valve Timing Oil Valves (2)
•Purge Valve
•Engine Cooling Fan
•Fuel pump relay
•Starter Relay
•Air conditioning condenser fan module
•EMS Main Relay
•Viscous Fan Control
•Generator Control
•Power Assisted Steering
•Diagnostic Module Tank Leakage (DMTL) (NAS
Only)
ECM Connector C0634 Pin Out Table
Input/OutputDescriptionPin No
Input/OutputCAN1
Input/OutputCAN2
InputGenerator monitor3
-UHEGO Bank A ground4
-UHEGO Bank B ground5
-Not used6
-Not used7
-Not used8
-Not used9
-Not used10
-CKP ground11
-CMP sensor bank A ground12
-CMP sensor bank B ground13
InputUHEGO sensor bank B signal14
-Electronic throttle body ground15
Electronic Engine ControlsLesson 2 – Powertrain
191Technical Training (G421151) 
						

							-MAF ground16
-HEGO ground17
-Not used18
-Knock sensor 1 ground19
-Knock sensor 2 ground20
-Knock sensor 3 ground21
-Knock sensor 4 ground22
OutputElectronic throttle body 5V
supply
23
OutputFuel pump relay24
-Not used25
-Not used26
-Not used27
-Not used28
InputRadiator temperature sensor29
InputCrank sensor signal30
-Not used31
-Not used32
InputCMP signal bank B33
InputCMP signal bank A34
-Not used35
InputUHEGO signal bank A36
-UHEGO signal bank A ground37
-UHEGO signal bank B ground38
InputFuel temperature sensor39
InputFuel pressure sensor40
InputNot used41
InputNot used42
OutputKnock sensor 1 +43
(G421151) Technical Training192
Lesson 2 – PowertrainElectronic Engine Controls 
						

							OutputKnock sensor 2 +44
OutputKnock sensor 3 +45
OutputKnock sensor 4 +46
OutputGenerator control47
OutputE-box fan48
-Not used49
OutputEGR stepper motor 450
OutputEGR stepper motor 351
OutputEGR stepper motor 252
OutputEGR stepper motor 153
OutputIgnition coil cylinder 4 B54
OutputIgnition coil cylinder 4 A55
OutputIgnition coil cylinder 3 B56
-Not used57
-Not used58
-Not used59
-Not used60
-Not used61
-Not used62
-Not used63
-Not used64
-Not used65
-Not used66
-Not used67
-Not used68
-Not used69
InputMAF70
OutputPurge valve71
-Starter relay -72
Electronic Engine ControlsLesson 2 – Powertrain
193Technical Training (G421151) 
						

							OutputThrottle body power supply73
OutputThrottle valve open direction -74
OutputThrottle valve open direction +75
OutputUHEGO Heater bank A76
OutputUHEGO Heater bank B77
OutputInjector cylinder 4B78
OutputInjector cylinder 4A79
OutputInjector cylinder 3B80
OutputInjector cylinder 3A81
OutputInjector cylinder 2B82
OutputInjector cylinder 2A83
OutputInjector cylinder 1B84
OutputInjector cylinder 1A85
OutputVVT bank A86
OutputVVT bank B87
OutputViscous fan control88
-Not used89
InputOil temperature sensor90
InputThrottle body monitor signal91
OutputStarter motor relay +92
-Not used93
InputViscous fan request94
OutputPurge valve95
ECM Connector C0635 Pin Out Table
Input/OutputDescriptionPin No
-Signal ground 11
-Power ground 12
-Power ground 33
(G421151) Technical Training194
Lesson 2 – PowertrainElectronic Engine Controls 
						

							Input/OutputDescriptionPin No
-Power ground 24
InputECM power5
-APP sensor ground 16
-APP sensor ground 27
-Not used8
-Not used9
-Not used10
-Not used11
InputPark/Neutral signal12
-Not used13
-Not used14
-Not used15
OutputEMS relay16
OutputCrank request17
OutputCAN +18
OutputAPP sensor 2 power19
OutputFuel pump control20
-Not used21
-Not used22
-Not used23
OutputAPP sensor 1 signal24
-Not used25
InputBrake light switch26
-Not used27
-Not used28
-Not used29
InputIgnition switch30
InputCAN +31
Electronic Engine ControlsLesson 2 – Powertrain
195Technical Training (G421151) 
						

							Input/OutputDescriptionPin No
OutputAPP sensor 1 power32
OutputDMTL33
-Not used34
OutputCruise switch -35
InputCruise switch +36
CRANKSHAFT POSITION SENSOR
(CKP)
The crankshaft position sensor is mounted at the rear
underside of the engine near the transmission bell
housing. Connection between the sensor and the harness
is via a link harness and a two-way connector. Both
wires go directly to the ECM. The sensor produces the
signal which enables the ECM to determine the angle
of the crankshaft, and the engine rpm. From this, the
point of ignition, fuel injection, etc. is calculated. If the
signal wires are reversed a 3° advance in timing will
occur, as the electronics within the ECM uses the falling
edge of the signal waveform as its reference / timing
point for each tooth.
The reluctor is pressed into the flywheel and has a
tooth pattern based on 36 teeth at 10° intervals and
approximately 3° wide: one of the teeth is removed to
provide a hardware reference mark which is 60 degrees
BTDC No.1 cylinder. Because of the crankshaft sensors
orientation, the target wheel uses windows machined
into the face, rather than actual teeth.
The sensor operates by generating an output voltage
caused by the change in magnetic field that occurs as
the windows pass in front of the sensor. The output
voltage varies with the speed of the windows passing
the sensor, the higher the engine speed, the higher the
output voltage. Note that 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). The ECM transmits the engine speed
to other vehicle ECUs on CAN.
CAMSHAFT POSITION SENSOR
(CMP)
Two sensors are located at the rear of the engine, in the
cylinder head (one per bank), above the rear cylinders.
This is a Variable Reluctor Sensor (VRS) producing
(G421151) Technical Training196
Lesson 2 – PowertrainElectronic Engine Controls