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.

1. Verify the customer concern
2. Visually inspect for obvious signs of damage and system integrity

Visual Inspection

3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step
4. 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
5. 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:

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

Intake Air Distribution and Filtering - Ingenium i4 2.0l Diesel / Description and OperationStarting System - Ingenium i4 2.0l Diesel Starter Motor (G1879568) / Removal and Installation

READ NEXT: