Defender. Manual — part 131
OVERVIEW
The engine crankshaft pulley drives the accessory components, which comprise the torsional vibration damper,
generator, power steering pump, A/C compressor, vacuum pump and coolant pump, via the accessory drive belt.
The belt, which is maintenance free poly-V type belts, are automatically pre-loaded by the automatic tensioner and are
routed over deflection pulleys in order to maintain sufficient adhesion about the drive wheels. This ensures slip-free
drive of the accessory components.
Accessory Drive - 2.4L Duratorq-TDCi HPCR (103kW/140PS) - Puma -
Accessory Drive
Diagnosis and Testing
Overview
For information on the description and operation of the system:
REFER to:
Accessory Drive
(303-05 Accessory Drive - 2.4L Duratorq-TDCi HPCR (103kW/140PS) - Puma, Description and
Operation).
Inspection and Verification
1. 1. Verify the customer concern.
2. 2. Visually inspect for obvious mechanical faults.
Visual Inspection Chart
Mechanical
Drive belt condition (cracking/damage/contamination)
Idler assembly
Generator
Engine cooling fan
Tensioner assembly
Engine coolant pump
Power steering pump
Air conditioning (A/C) compressor
Torsional vibration damper
Accessory drive belt
3. 3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before
proceeding to the next step.
CAUTION: If the engine is run without the accessory drive belts connected to eliminate driven components,
diagnostic trouble codes, (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 2-3 minutes with the belts disconnected. Failure to follow this instruction may
result in damage to the vehicle.
4. 4. Use the approved diagnostic system or a scan tool to retrieve any DTCs before moving onto the symptom
chart or DTC index.
Make sure that all DTCs are cleared following rectification.
Symptom Chart (Accessory Drive Belt)
Symptom
Possible cause
Action
Noise
Belt condition
Belt tension
Pulleys
misaligned
Driven
components
(including
tensioners)
Check the belt condition (see visual inspection). Check the tensioner function. Check
the pulley alignment. Check the driven components for excessive resistance to
rotation. Rectify as necessary.
Drive belt
does not hold
tension
Belt condition
Tensioner
fault
Check the belt condition (see visual inspection). Check the tensioner function.
Rectify as necessary.
DTC Index
• NOTE: If a control module or component is suspect and the vehicle remains under manufacturer warranty, refer to the
Warranty Policy and Procedures manual (section B1.2), or determine if any prior approval program is in operation,
before the replacement of a component.
• NOTE: Generic scan tools may not read the codes listed, or may read only 5-digit codes. Match the 5 digits from the
scan tool to the first 5 digits of the 7-digit code listed to identify the fault (the last 2 digits give extra information read
by the manufacturer-approved diagnostic system).
• NOTE: When performing voltage or resistance tests, always use a digital multimeter (DMM) accurate to three decimal
places, and with an up-to-date calibration certificate. When testing resistance always take the resistance of the DMM
leads into account.
• NOTE: Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests.
• NOTE: Inspect connectors for signs of water ingress, and pins for damage and/or corrosion.
• NOTE: If DTCs are recorded and, after performing the pinpoint tests, a fault is not present, an intermittent concern
may be the cause. Always check for loose connections and corroded terminals.
• NOTE: For a full list of engine control module (ECM) DTCs:
REFER to:
Electronic Engine Controls
(303-14 Electronic Engine Controls - 2.4L Duratorq-TDCi HPCR (103kW/140PS) -
Puma, Diagnosis and Testing).
DTC
Description
Possible causes
Action
P062300 Generator
lamp control
circuit
Check generator belt is not
broken, excessively worn or
slipping when engine running
Generator lamp control circuit
fault
Generator fault
Check the charging voltage. Install a new accessory drive
belt if necessary.
REFER to:
Accessory Drive Belt
(303-05 Accessory Drive -
2.4L Duratorq-TDCi HPCR (103kW/140PS) - Puma, Removal
and Installation).
Check the charging system circuits. Check the generator
lamp control circuit. Refer to the electrical guides. Install a
new generator if necessary.
REFER to:
Generator
(414-02 Generator and Regulator -
2.4L Duratorq-TDCi HPCR (103kW/140PS) - Puma, Removal
and Installation).
Clear the DTCs and test for normal operation.
Accessory Drive - 2.4L Duratorq-TDCi HPCR (103kW/140PS) - Puma -
Accessory Drive Belt
Removal and Installation
Removal
1. Disconnect the battery ground cable.
For additional information, refer to:
Battery Disconnect and
Connect
(414-01 Battery, Mounting and Cables, General
Procedures).
2. Remove the accessory drive belt tensioner.
For additional information, refer to:
Accessory Drive Belt
Tensioner
(303-05 Accessory Drive - 2.4L Duratorq-TDCi
HPCR (103kW/140PS) - Puma, Removal and Installation).
3. Remove the air conditioning (A/C) compressor pulley
cover.
Remove the nut.
Remove the 2 bolts.
4. Remove the accessory drive belt.
Installation
1. To install, reverse the removal procedure.
Clean and inspect the drive pulleys for damage.
2. Connect the battery ground cable.
For additional information, refer to:
Battery Connect
(414-01
Battery, Mounting and Cables, General Procedures).
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