Land Rover Discovery: Intake Air Distribution
and Filtering - Ingenium i4
2.0l Diesel / Diagnosis and Testing
PRINCIPLES OF OPERATION
For a detailed description of the Intake Air Distribution and Filtering,
refer
to the relevant Description and Operation section in the workshop manual.
REFER to: Intake Air Distribution and Filtering (303-12B Intake Air
Distribution and Filtering - INGENIUM I4 2.0L Diesel, Description and
Operation).
INSPECTION AND VERIFICATION
CAUTION:
Diagnosis by substitution from a donor vehicle is NOT acceptable.
Substitution of control modules does not guarantee confirmation of a
fault, and may also cause additional faults in the vehicle being tested
and/or the donor vehicle.
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
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- 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
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SYMPTOM:
Vehicle does not
start/hard
starting/poor
performance
POSSIBLE CAUSES:
- Restricted/blocked air
intake
- Restricted/blocked air
filter
ACTION:
- Ensure the air intake system is free
from blockage and is correctly
installed
- Install a new air cleaner element as
necessary
SYMPTOM:
Poor performance
POSSIBLE CAUSES:
- Turbocharger fault
- Throttle body fault
- Intercooler hoses
ACTION:
- Check the turbocharger
- Check the intake air shut-off
throttle function (make sure the
throttle body returns to the open
position)
- Check the intercooler hoses
SYMPTOM:
Excessive intake
noise
POSSIBLE CAUSES:
- Intake air leak after the
turbocharger
- Intake pipe
disconnected/damaged
after the air cleaner
- Air cleaner assembly
incorrectly
assembled/damaged
ACTION:
- Check the joint between the air
intake elbow and the intake air
shut-off throttle
- Check the joints between the
throttle body outlets and the intake
manifolds
- Check the charge air cooler seals
- Check the intake system and hoses
for correct installation/damage
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).
Intake Air Distribution
and Filtering - Ingenium i4
2.0l Diesel / Specifications
Torque Specifications
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READ NEXT:
REMOVAL
NOTES:
Some variation in the illustrations may occur, but the essential
information is always correct.
Removal steps in this procedure may contain installation details.
All vehicles
WARNI
COMPONENT LOCATION - SHEET 1 OF 3 - VEHICLES
WITHOUT AUTO STOP/ START SYSTEM
Stop/Start switch
Engine Control Module (ECM)
Starter motor
COMPONENT LOCATION - SHEET 2 OF 3 - VEHICLES WITH AUTO
The stop/start switch is located in the Instrument Panel (IP) and is
hardwired
to the Central Junction Box (CJB). When the switch is pressed two signal
lines from the CJB are connected to ground.
A
SEE MORE:
Measuring options
Comparison measurements can also be made on the outside of the body.
Depending on the damage, comparison measurements and diagonal
measurements can be carried out using compass, telescopic rod, tape
measure or ruler.
NOTE:
The same reference points must be chosen on both side
SPECIAL TOOL(S)
DRAINING
WARNING:
Since injury such as scalding could be caused by escaping steam or
coolant, do not remove the filler cap from the coolant expansion tank
while the system is hot.
CAUTIONS:
The engine cooling system must be maintained with the correct
concentration and type of