Land Rover Discovery: Accessory Drive - Ingenium i4 2.0l Diesel / Diagnosis and Testing

PRINCIPLES OF OPERATION

For a detailed description of the Accessory Drive Belt, refer to the relevant Description and Operation section in the workshop manual. REFER to: Accessory Drive (303-05B Accessory Drive - INGENIUM I4 2.0L Diesel, Description and Operation).

INSPECTION AND VERIFICATION

WARNINGS:

• Cooling fans may continue to operate after the engine is turned off.

  They may also start to operate after the engine is turned off and continue operating for up to 10 minutes. Failure to follow this instruction may result in personal injury.

• Always keep hands, tools, clothing and any equipment away from rotating belts and pulleys. Failure to follow this instruction may result in personal injury.

CAUTIONS:

• If the engine is run without the accessory drive belt installed (to eliminate driven components), DTCs may be set which must be cleared before the vehicle is returned to the owner. The engine should not be run for more than three minutes without the accessory drive belt installed. Failure to follow this instruction may result in damage to the vehicle.
• 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

MECHANICAL

• Accessory drive belt
• Accessory drive belt tension
• Accessory drive belt tensioner
• Accessory drive belt idler pulleys

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:

Accessory drive belt noise

POSSIBLE CAUSES:

• Accessory drive belt stretched, damaged or contaminated with oil
• Accessory drive belt pulley(s) misaligned/damaged/seized

ACTION:

• GO to Pinpoint Test A.
• Check the accessory drive belt pulleys for correct alignment, damage and freedom of rotation
• Using the manufacturer approved diagnostic system, perform routine - Noise, vibration and harshness sensor diagnostic test - Accessory drive belt

SYMPTOM:

Accessory drive belt does not hold tension

POSSIBLE CAUSES:

• Accessory drive belt stretched, damaged or contaminated with oil
• Accessory drive belt tensioner worn/damaged

ACTION:

• GO to Pinpoint Test A.
• GO to Pinpoint Test B.

PINPOINT TESTS

WARNING:

Ensure that the engine is stopped before performing this test. Failure to follow this instruction may result in personal injury.

WARNING:

Ensure that the engine is stopped before performing this test. Failure to follow this instruction may result in personal injury.

WARNING:

Ensure that the engine is stopped before performing this test. Failure to follow this instruction may result in personal injury.

WARNING:

Ensure that the engine is stopped before performing this test. Failure to follow this instruction may result in personal injury.

WARNING:

Eye protection must be worn during this test. Failure to follow this instruction may result in personal injury.

NOTE:

Excessive drive belt rideout (uneven depth of grooves in the accessory drive belt) can also cause excessive accessory drive belt tensioner movement.

WARNING:

Eye protection must be worn during this test. Failure to follow this instruction may result in 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).

Accessory Drive - Ingenium i4 2.0l Diesel Specifications

Torque Specifications

Accessory Drive - Ingenium i4 2.0l Diesel Accessory Drive Belt (G1882049) / Removal and InstallationElectronic Engine Controls  - Ingenium i4 2.0l Diesel

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