Land Rover Discovery: Engine Cooling - Ingenium i4 2.0l Diesel / Diagnosis and Testing
PRINCIPLES OF OPERATION
For a detailed description of the Engine Cooling system, refer to the
relevant Description and Operation section in the workshop manual.
REFER to: Engine Cooling (303-03B Engine Cooling - INGENIUM I4 2.0L
Diesel, Description and Operation).
INSPECTION AND VERIFICATION
WARNING:
Release the cooling system pressure by slowly turning the coolant
expansion tank cap a quarter of a turn. Cover the expansion tank cap
with a thick cloth to prevent the possibility of scalding. Failure to
follow this instruction may result in personal injury.
CAUTIONS:
NOTES:
- If a control module or a component is suspect and the vehicle
remains under manufacturer warranty, 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.
- When performing voltage or resistance tests, always use a digital
multimeter accurate to three decimal places, and with an up-todate
calibration certificate. When testing resistance always take the
resistance of the digital multimeter leads into account.
- Check and rectify basic faults before beginning diagnostic routines
involving pinpoint tests.
- Verify the customer concern
- Visually inspect for obvious signs of damage and system integrity
Visual Inspection
- If an obvious cause for an observed or reported concern is found,
correct the cause (if possible) before proceeding to the next step
- If the cause is not visually evident, verify the symptom and refer to
the
Symptom Chart, alternatively check for Diagnostic Trouble Codes
(DTCs) and refer to the DTC Index
- Check DDW for open campaigns. Refer to the corresponding bulletins
and SSMs which may be valid for the specific customer complaint and
carry out the recommendations as required
SYMPTOM CHART
SYMPTOM:
Coolant loss
POSSIBLE CAUSES:
- Coolant hose(s) leaking
- Coolant hose
connection(s) leaking
- Radiator leaking
- Variable coolant pump
leaking
- Heater core leaking
- Seals leaking
- Engine casting leaking
- Engine core plugs
leaking
ACTION:
GO to Pinpoint Test
A.
SYMPTOM:
Engine overheating
POSSIBLE CAUSES:
- Coolant level low
- Thermostat
flow/direction valve fault
- Electric cooling fan
inoperative
- Engine coolant
temperature sensor fault
- Radiator airflow
restricted
ACTION:
SYMPTOM:
Engine not reaching normal operating
temperature
POSSIBLE CAUSES:
- Thermostat
flow/direction valve fault
- Electric cooling fan stuck
on
ACTION:
SYMPTOM:
Message centre displays "Coolant Level
Low" warning message
POSSIBLE CAUSES:
- Coolant loss
- Engine coolant level
sensor fault
- Engine coolant level
sensor circuit fault
ACTION:
COMPONENT TESTS
COOLING SYSTEM PRESSURE TEST
WARNING:
Never, under any circumstances, remove the coolant expansion tank
pressure cap while the engine is operating. To avoid having scalding
hot water or steam blow out of the cooling system, use extreme care
when removing the coolant expansion tank pressure cap from a hot
cooling system. Wait until the engine has cooled, then wrap a thick
cloth around the coolant expansion tank pressure cap and turn it
slowly until the pressure begins to release, step back while the
pressure is released from the system. When certain all the pressure
has been released (still with a cloth) turn and remove the coolant
expansion tank pressure cap. Failure to follow these instructions may
result in damage to the cooling system, engine and/or cause personal
injury.
- Switch the engine off
- Open the hood and install protective fender covers
- Carefully remove the coolant expansion tank pressure cap from the
coolant expansion tank to relieve pressure in the cooling system. Add
coolant to coolant expansion tank as necessary
- Install the pressure tester equipment to the cooling system following
manufacturers instructions. Reinstall the coolant expansion tank
pressure cap (if pressure test equipment is not installed to the coolant
expansion tank)
- Pressurize the cooling system to the coolant expansion tank pressure
cap lower limit
- Observe the gauge reading for approximately two minutes. Pressure
should not drop during this time
- If system holds pressure, continue from step 7
- If the pressure drops, check the complete cooling system for leaks. Also
refer to engine system checks if a leak cannot be
located in the cooling system. Correct any leaks found and
recheck the system
- Release the system pressure and remove the pressure test equipment.
Check the coolant level. Replenish as necessary with the correct
coolant solution
- Check the radiator overflow hose for any obstructions which may block
the flow of coolant either to or from the coolant expansion tank
- Conduct the coolant expansion tank pressure cap pressure test in this
section
COOLANT EXPANSION TANK PRESSURE CAP PRESSURE TEST
WARNING:
Never, under any circumstances, remove the coolant expansion tank
pressure cap while the engine is operating. To avoid having scalding
hot water or steam blow out of the cooling system, use extreme care
when removing the coolant expansion tank pressure cap from a hot
cooling system. Wait until the engine has cooled, then wrap a thick
cloth around the coolant expansion tank pressure cap and turn it
slowly until the pressure begins to release, step back while the
pressure is released from the system. When certain all the pressure
has been released (still with a cloth) turn and remove the coolant
expansion tank pressure cap. Failure to follow these instructions may
result in damage to the cooling system, engine and/or cause personal
injury.
- Remove the expansion tank pressure cap from the coolant expansion
tank
- Use water to clean cap in area of rubber seal and vacuum relief valve.
Following manufacturers instructions, install the coolant expansion tank
pressure cap to the pressure tester
NOTE:
If the pressure tester is pressurised too quickly, an erroneous pressure
reading may result.
- Slowly pressurise the system until the pressure gauge reading stops
increasing, and note highest pressure reading obtained
- Release pressure and repeat Step 3 at least twice to make sure the
pressure test reading is repeatable and within specification
- If the pressure test gauge readings are not within specification,
install
a new coolant expansion tank pressure cap
THERMOSTAT TEST
Check the electric thermostat for loose or corroded connector(s), check the
operation of the electric flow/direction valve(s). If the engine still does not
maintain the correct temperature, suspect the operation of the internal wax
type thermostat. Check and replace parts as necessary
RADIATOR LEAK TEST - REMOVED FROM THE VEHICLE
CAUTION:
Do not leak test an aluminium radiator in the same water that is used
to leak test copper/brass radiators. Flux and caustic cleaners may be
present in the test water which will corrode aluminium. If a separate
tank is not available, drain and rinse the test tank before testing an
aluminium radiator.
Clean the radiator before leak testing to prevent contamination of the test
tank. Leak test the radiator in clean water with 138 kPa (20 psi) air pressure
PINPOINT TESTS
WARNING:
The cooling system is pressurized! Ensure the reservoir cap is never
released until the system has cooled. Failure to follow these
instructions may result in personal injury.
WARNINGS:
- DO NOT remove the coolant expansion tank cap when the engine
is hot. Failure to follow this instruction may result in personal injury.
- Never, under any circumstances, remove the coolant expansion
tank pressure cap while the engine is operating. To avoid having
scalding hot water or steam blow out of the cooling system, use
extreme care when removing the coolant expansion tank pressure
cap from a hot cooling system. Wait until the engine has cooled,
then wrap a thick cloth around the coolant expansion tank pressure
cap and turn it slowly until the pressure begins to release, step back
while the pressure is released from the system. When certain all the
pressure has been released (still with a cloth) turn and remove the
coolant expansion tank pressure cap. Failure to follow these
instructions may result in damage to the cooling system, engine
and/or cause personal injury.
DTC INDEX
For a list of Diagnostic Trouble Codes (DTCs) that could be logged on this
vehicle, please refer to Section 100-00. REFER to: Diagnostic Trouble Code
Index - INGENIUM I4 2.0L Diesel, DTC: Engine Control Module (ECM)
B10A2-07 to P034B-76 (100-00 General Information, Description and
Operation).
Engine Cooling - Ingenium i4 2.0l Diesel Specifications
Lubricants, Fluids, Sealers and Adhesives
NOTE:
Coolant must be collected into a clean container and can be reused if
not contaminated.
Capacities
General Specification
Torque Specifications
READ NEXT:
REMOVAL
WARNING:
Make sure to support the vehicle with axle stands.
Raise and support the vehicle.
Refer to: Diesel Exhaust Fluid Tank Drain and Refill (303-08B Engine
Emission Control - INGENIUM I4 2
GENERAL EQUIPMENT
Land Rover diagnostic equipment
PART(S)
REMOVAL
WARNING:
Observe due care when working near a hot exhaust system.
CAUTION:
Make sure that all openings are sealed. Use new blanking c
GENERAL EQUIPMENT
CHECK
Using the Land Rover approved diagnostic equipment, follow the
on-screen instructions and check the diesel exhaust fluid level.
General Equipment: Land Rover diagnostic
SEE MORE:
To avoid damage to the bonnet, do
not lift the wiper blades when they
are in the normal parked position.
Note: The Smart key must remain in the
vehicle while the wiper blades are
replaced.
Before changing a wiper blade, the wiper
arms must be set in the 'service' position
as follows:
Make sure the
COMPONENT LOCATION
TV antenna amplifier/Fuel Fired Booster Heater (FFBH)
receiver
Frequency Modulation (FM) antenna amplifier
Television (TV) antenna amplifier
Amplitude Modulation (AM)/Frequency Modulation (FM)
antenna amplifier
Wireless headphones
Rear Seat Entertainment (RSE) screen