Land Rover Lesson 2 Auto Trans Coolingine Rover Manual

Voltage (Volts)Resistance (Kohms)Temperature (Degrees
Celsius)
0.642.990
0.492.08100
0.381.56110
0.291.19120
0.220.918130
0.170.673140
0.140.563150
If the ECT sensor fails, the following symptoms may
be observed:
•Difficult cold start.
•Difficult hot start.
•Engine performance compromised.
•Temperature gauge inoperative or inaccurate reading.
In the event of ECT sensor signal failure, the ECM
applies a default value of 80°Celsius (176°F) coolant
temperature for fuelling purposes. The ECM will also...

The ECM monitors the fuel temperature constantly. If
the fuel temperature exceeds 85°Celsius (185°F), the
ECM invokes an engine derate strategy. This reduces
the amount of fuel delivered to the injectors in order to
allow the fuel to cool. When this occurs, the driver may
notice a loss of performance.
Further fuel cooling is available by a bi-metallic valve
diverting fuel through the fuel cooler when the fuel
reaches a predetermined temperature. In hot climate
markets, an electrically operated cooling...

•During crank
•Post heat
The main part of the glow plug is a tubular heating
element which protrudes into the combustion chamber
of the engine. The heating element contains a spiral
filament encased in magnesium oxide powder. At the
tip of the tubular heating element is the heater coil.
Behind the heater coil, and connected in series, is a
control coil. The control coil regulates the heater coil
to ensure that it does not overheat.
Pre-heat is the length of time the glow plugs operate
prior to engine...

If the BP sensor fails, the ECM uses a default pressure
of 1013 mbar (14 lbf/in²). In the event of a BP sensor
failure, the following symptoms may be observed:
•Altitude compensation inoperative (black smoke
emitted from the exhaust).
•Active boost control inoperative.
Boost control is achieved by the use of a direct drive
electric actuator. The actuator is attached to the side of
the turbo unit and is connected with the control
mechanism via a linkage. The electric actuator works
on the torque motor...

•Engine temperature
•Engine speed.
In the event of a total failure of the fuel rail pressure
control valve, the engine will not start.
In the event of a partial failure of the fuel rail pressure
control valve, the ECM will activate the solenoid with
the minimum duty cycle which results in the injection
quantity being limited.
FUEL VOLUME CONTROL VALVE
The fuel rail volume control valve is incorporated into
the high pressure fuel pump. The VCV spills unwanted
fuel back to the tank (or LP system) or...

EGR
The EGR modulator and cooler are a combined unit.
The combined EGR modulator and cooler is located
under each cylinder bank, between the exhaust manifold
and the cylinder head. The cooler side of the EGR is
connected to the vehicle cooling system, via hoses. The
inlet exhaust side is connected directly into the exhaust
manifolds on each side. The exhaust gas passes through
the cooler and is expelled via the actuator and a metal
pipe into the throttle housing. The EGR modulator is a
solenoid operated...

mechanism is compressed and gives the driver the
feeling of depressing a kickdown switch when full
pedal travel is achieved.
ELECTRONIC THROTTLE
The electric throttle body is located in the inlet tract
prior to where the inlet splits to divert air flow into the
two separate air intake manifolds. The electric throttle
controls the volume of air allowed into the inlet
manifold by means of a DC motor which controls a flap
in the body of the throttle. This is done in response to
inputs from the engine...

GENERATOR
The generator has a multifunction voltage regulator for
use in a 14V charging system with 6÷12 zener diode
bridge rectifiers.
The ECM monitors the load on the electrical system via
PWM signal and adjusts the generator output to match
the required load. The ECM also monitors the battery
temperature to determine the generator regulator set
point. This characteristic is necessary to protect the
battery; at low temperatures battery charge acceptance
is very poor so the voltage needs to be high to...

Cooling System Component Layout
Heater hose, inlet and outlet1
Heater hose, inlet and outlet for vehicles with
rear heater (optional)
2
Hose, radiator to intake manifold3
Radiator top hose4
Engine Coolant Temperature (ECT) sensor5
Water pump6
Throttle body7
Inlet manifold8
Throttle body coolant hose9
Hose, engine to expansion tank10
Expansion tank11
Radiator bottom hose12
Engine oil cooler (if fitted)13
Engine CoolingLesson 2 – Powertrain
115Technical Training (G421099) 

Hose (for vehicles without engine oil cooler)14
Hose, inlet and outlet (for vehicles with engine
oil cooler)
15
Cooling fan16
Transmission oil cooler pipes17
Radiator cowl, lower18
Radiator19
Radiator cowl, upper20
GENERAL
The cooling system employed is of the pressure relief
by-pass type, which allows coolant to circulate around
the engine and the heater circuit while the thermostat
main valve is closed. The primary function of the
cooling system is to maintain the engine within an
optimum temperature...