Generators & Regulators Land Rover Discovery L318

MODEL IDENTIFICATION

ENGINE IDENTIFICATION

CHARGE WARNING INDICATOR

Charge Warning Indicator illuminates as a bulb check when the ignition switch is turned to position II and extinguishes when the engine is running and the generator is producing normal power. If the generator is not producing normal power or stops turning the indicator will illuminate. Generators are interfaced to the instrument cluster via the Body Electronic Control Module (BECM).

When the engine is started inside the generator the magnetized rotor turns within the stator windings, generating 3 phase alternating current and a voltage that rises rapidly with rotor speed. The field diode in the rectifier pack converts the alternating current into direct current flowing through the field windings. This causes an increase in the magnetic influence of the rotor, resulting in energy output higher than the battery level. The field current increases with rotor speed and thus increases the generated current and voltage until the generator is producing electrical output at an energy level higher than the battery.

The regulator is located within the generator assembly.

BATTERY DISCONNECT/CONNECT (DISCOVERY II)

Disconnect/Connect

1. Release fasteners and remove battery cover. (Scheme 1)
2. Disconnect negative battery cable.
3. Clean battery terminal and coat with petroleum jelly.
4. Install negative battery cable.
5. Install battery cover and secure fasteners.

Scheme 1

BATTERY DISCONNECT/CONNECT (RANGE ROVER)

1. Release 3 fasteners securing battery cover. Remove cover. (Scheme 2)
2. Remove 2 nuts and one bolt securing battery clamp. Remove clamp.
3. Disconnect negative battery cable.
4. During reconnect, coat battery clamp and terminal with petroleum jelly.
5. Reconnect negative battery cable.

Scheme 2

Back-Up Battery

Vehicle may be equipped with a back-up battery. The purpose is to power the anti-theft alarm if the main vehicle battery is disconnected. If the main vehicle battery is to be removed it is essential to adopt the following procedure before disconnecting the terminals in order to prevent the alarm sounding: Turn the ignition to ON and then OFF position. Disconnect the battery WITHIN 17 seconds (if the battery is not disconnected WITHIN 17 seconds, the alarm will sound).

DRIVE BELT TENSION

A serpentine drive belt is used to drive all accessories. Accessory drive belt tension is controlled by a belt tensioner. Check accessory drive belt for signs of splits, fraying, oil contamination and wear. Replace as necessary.

PRELIMINARY CHARGING SYSTEM CHECK

Ensure battery is in good condition and has a circuit voltage of at least 12.3-12.6 volts. Ensure battery connections are clean and tight. Ensure battery charging area is well ventilated and that there are no open flames or sparks. Check condition of accessory drive belt. Ensure generator connections are clean and tight. Check for parasitic drain on battery.

CHARGE WARNING INDICATOR DOES NOT ILLUMINATE

Note. Discovery Series II testing information is not available from manufacturer.

Range Rover

If charge warning indicator does not illuminate with the engine off and ignition switch in II position, check bulb. If bulb is okay, check Body Electronic Control Module (BECM) connector terminals, instrument cluster and the datalink between them. Perform repairs as necessary. See WIRING DIAGRAMS .

BENCH TESTING

Note. Bench testing information is not available from manufacturer.

Removal & Installation

1. Remove viscous fan. See «VISCOUS FAN (DISCOVERY II)»(/land-rover/discovery/l318-2002-2004/remont/charging-system/#generators-regulators).
2. Turn drive belt tensioner using a 15 mm box wrench and release belt from pulleys. (Scheme 3)
3. Clean drive belt pulley grooves and ensure grooves are not damaged.
4. With assistance, hold tensioner fully clockwise and install drive belt around remaining pulley. Release tensioner.
5. Install viscous fan.

Scheme 3

1. Remove viscous fan. See «VISCOUS FAN (RANGE ROVER)»(/land-rover/discovery/l318-2002-2004/remont/charging-system/#generators-regulators).
2. Remove 2 bolts securing accessory drive belt cover, remove cover and collect spacers. (Scheme 4)
3. Release auxiliary drive belt tensioner using a 15 mm box wrench and remove belt from pulleys. (Scheme 5)
4. Clean drive belt pulley grooves and ensure grooves are not damaged.
5. Install NEW drive belt around pulleys, ensure belt is correctly aligned in pulley grooves.
6. With assistance, hold tensioner fully clockwise and install drive belt around remaining pulley.
7. Install accessory drive belt cover and spacers, and secure with bolts.
8. Install cooling fan.

Scheme 4

Scheme 5

Removal

1. Disconnect negative battery cable. See «BATTERY DISCONNECT/CONNECT (RANGE ROVER)»(/land-rover/discovery/l318-2002-2004/remont/charging-system/#generators-regulators__battery-disconnectconnect-range-rover).
2. Remove radiator cooling fan cowl.
3. Remove drive belt. See «DRIVE BELT (RANGE ROVER)»(/land-rover/discovery/l318-2002-2004/remont/charging-system/#generators-regulators).
4. Remove tensioner pulley securing bolt. Remove pulley. (Scheme 6)
5. Remove tensioner securing bolt. Remove tensioner.

Scheme 6

Installation

1. Ensure mating faces are clean.
2. Install tensioner and ensure dowel is correctly located.
3. Install tensioner securing bolt. Tighten to specification. See «TORQUE SPECIFICATIONS»(/land-rover/discovery/l318-2002-2004/remont/charging-system/#generators-regulators__torque-specifications) .
4. Install tensioner pulley. Tighten bolt to specification. See «TORQUE SPECIFICATIONS»(/land-rover/discovery/l318-2002-2004/remont/charging-system/#generators-regulators__torque-specifications) .
5. Install generator drive belt. See «DRIVE BELT (RANGE ROVER)»(/land-rover/discovery/l318-2002-2004/remont/charging-system/#generators-regulators) .
6. Install radiator cooling fan cowl.
7. Reconnect negative battery cable.

1. Disconnect battery. See «BATTERY DISCONNECT/CONNECT (DISCOVERY II)»(/land-rover/discovery/l318-2002-2004/remont/charging-system/#generators-regulators__battery-disconnectconnect-discovery-ii).
2. Remove accessory drive belt. See «ACCESSORY DRIVE BELT (DISCOVERY II)»(/land-rover/discovery/l318-2002-2004/remont/charging-system/#generators-regulators).
3. Remove 2 bolts securing generator to mounting bracket. (Scheme 7)
4. Release generator from mounting bracket.
5. Remove nuts securing generator leads, and release leads. (Scheme 8)
6. Remove generator from mounting bracket.
7. Remove pulley from generator.
8. Installation is reverse of removal procedure. Tighten nuts and bolts to specifications. See «TORQUE SPECIFICATIONS»(/land-rover/discovery/l318-2002-2004/remont/charging-system/#generators-regulators__torque-specifications).
9. Connect battery. See «BATTERY DISCONNECT/CONNECT (DISCOVERY II)»(/land-rover/discovery/l318-2002-2004/remont/charging-system/#generators-regulators__battery-disconnectconnect-discovery-ii).
10. After repairs verify generator operation.

Scheme 7

Scheme 8

1. Disconnect battery. See «BATTERY DISCONNECT/CONNECT (RANGE ROVER)»(/land-rover/discovery/l318-2002-2004/remont/charging-system/#generators-regulators__battery-disconnectconnect-range-rover).
2. Remove generator drive belt. See «DRIVE BELT (RANGE ROVER)»(/land-rover/discovery/l318-2002-2004/remont/charging-system/#generators-regulators).
3. Remove 2 bolts securing generator to mounting bracket. (Scheme 9)
4. Release generator from mounting bracket.
5. Remove nuts securing generator cables, and release cables.
6. Remove generator from mounting bracket.

Scheme 9

1. Position generator to mounting bracket.
2. Connect generator cables, install nuts and tighten to torque specifications. See «TORQUE SPECIFICATIONS»(/land-rover/discovery/l318-2002-2004/remont/charging-system/#generators-regulators__torque-specifications) . The B+ and D+ connections are marked on the rear of the generator, adjacent to each cable connection.
3. Locate generator in mounting bracket.
4. Install bolts and tighten to specifications. See «TORQUE SPECIFICATIONS»(/land-rover/discovery/l318-2002-2004/remont/charging-system/#generators-regulators__torque-specifications) .
5. Install generator drive belt. See «DRIVE BELT (RANGE ROVER)»(/land-rover/discovery/l318-2002-2004/remont/charging-system/#generators-regulators) .
6. Connect battery. See «BATTERY DISCONNECT/CONNECT (RANGE ROVER)»(/land-rover/discovery/l318-2002-2004/remont/charging-system/#generators-regulators__battery-disconnectconnect-range-rover) .
7. After repairs, verify generator operation.

1. Release fasteners and remove battery cover.
2. Disconnect negative battery cable. See «BATTERY DISCONNECT/CONNECT (DISCOVERY II)»(/land-rover/discovery/l318-2002-2004/remont/charging-system/#generators-regulators__battery-disconnectconnect-discovery-ii).
3. Remove upper viscous fan cowl.
4. Remove viscous fan using tool LRT-12-093 and tool LRT-12-094. (Scheme 10)
5. To install, position viscous fan and tighten using tool LRT-12-093 and tool LRT-12-094.
6. Install battery cover and secure fasteners.
7. Install upper viscous fan cowl.
8. Connect negative battery cable.

Scheme 10

1. Release fasteners and remove battery cover. Disconnect negative battery cable. See «BATTERY DISCONNECT/CONNECT (RANGE ROVER)»(/land-rover/discovery/l318-2002-2004/remont/charging-system/#generators-regulators__battery-disconnectconnect-range-rover).
2. Remove bolt securing washer reservoir filler tube support bracket to radiator bracket. (Scheme 11)
3. Release 2 clips securing cooling fan cowl and remove viscous fan cowl. (Scheme 12)
4. Remove cooling fan using LRT-12-093 and LRT-12-094. (Scheme 13)
5. Installation is reverse of removal procedure.

Scheme 11

Scheme 12

Scheme 13

OVERHAUL

Note. Information is not available from manufacturer.

GENERATOR SPECIFICATIONS

GENERATOR SPECIFICATIONS

TORQUE SPECIFICATIONS

TORQUE SPECIFICATIONS

WIRING DIAGRAMS

For appropriate wiring diagram

1. See «STARTING/CHARGING»(ref-127996-S00471530492001103100000) in SYSTEM WIRING DIAGRAMS article for 2001 Discovery II
2. See «STARTING/CHARGING»(ref-151260-S14725853382002121200000) in SYSTEM WIRING DIAGRAMS article for 2002 Discovery II
3. See «STARTING/CHARGING»(ref-159345-S28882678672003120100000) in SYSTEM WIRING DIAGRAMS article for 2003 Discovery
4. See «STARTING/CHARGING»(ref-166686-S42680711372004092700000) in SYSTEM WIRING DIAGRAMS article for 2004 Discovery
5. See «STARTING/CHARGING»(ref-127997-S21712602072001103100000) in SYSTEM WIRING DIAGRAMS article for 2001 Range Rover
6. See «STARTING/CHARGING»(ref-151262-S10389706582002121200000) in SYSTEM WIRING DIAGRAMS article for 2002 Range Rover

See also:
• WIRING DIAGRAMS
• VISCOUS FAN (DISCOVERY II)
• BATTERY DISCONNECT/CONNECT (RANGE ROVER)
• TORQUE SPECIFICATIONS
• BATTERY DISCONNECT/CONNECT (DISCOVERY II)