1998 JAGUAR X308 engine

CAUTION: The engine must not be running when multiplugs are connected or disconnected.
Check that the main B+ terminal is clean and tight.
Check that the IG terminal is clean and ma king good contact; if this connection is faulty, the generator will never function
correctly.
Disconnect the multi-plug at th e rear of the generator. With the engine not running and with the ignition switched on, use a
DMM to check for battery voltage between the centre pin on the multi-plug connector and a good vehicle ground. If the
measured voltage is correct, switch off the ignition and reconnect the multi-plug.
Multiplug Connector

If no voltage or low voltage is indicated, check for continuity of the harness between the multi-plug and Fuse 5 (10A) in the
Engine Compartment Fusebox - Left Hand Si de. Repair any damage to the harness if necessary. It should be noted that if
Fuse 5 has blown, the starter motor will not operate and the Engine Control Module will not receive an ignition supply.
Consequently, the engine will not st art, even with a slave battery.
Start the engine and test for correct ch arge or voltage level; check as described previously. If not charging and the
generator is being driven ie. no be lt slipping - renew the generator.


3Ground Stud for Suppression Module
4Heatsink for Voltage Regulator
ItemDescription
1Not Connected
2IG - Ignition Supply to Generator
3WL - Output to Charge Warning Lamp

suppression module positive cable from the positive
terminal.
3. Where fitted, remove the nut which secures the
suppression module negati ve cable and disconnect
the cable from the generator. Reposition the
suppression module harness clear of the generator.

9. Remove the lower mounting bolt and reposition the harness
mounting bracket.

10. Remove the upper securing bolt and withdraw the generator
from the mounting bracket.

11. Carefully, manoeuvre the ge nerator forward towards the
radiator.
12. Change the position of the ge nerator and remove it upwards
between the engine and the radiator.

Installation


13. Move the spacing bush rearward s slightly in the generator
mounting bracket, to ease fitting the new generator.
1. Position a suitable length bolt through the bush, fit a
tubular spacer or socket spanner, fit a nut and
tighten the assembly to move the bush slightly.
Remove the nut, bolt and spacer.

1. Fit the generator to the engine.
1. From above, position th e generator and fit the upper
mounting bolt and nut, but do not fully tighten.

2. Fit the generator lower mounting.
1. From below, reposition an d align the harness clip to
the generator lower mounting.
2. Fit the lower mounting bolt and nut, tighten to 38-48
Nm.
3. Connect the harness.
1. Reposition the suppres sion module harness and
connect the negative cable to the generator negative
terminal. Fit and tighten the terminal nut.

Installation


15. Change the position of the ge nerator and remove it upwards
between the engine and the radiator.

16. Move the spacing bush rearward s slightly in the generator
mounting bracket, to ease fitting the new generator.
1. Position a suitable length bolt through the bush, fit a
tubular spacer or socket spanner, fit a nut and
tighten the assembly to move the bush slightly.
Remove the nut, bolt and spacer.

1. Fit the generator to the engine.
1. From above, position th e generator and fit the upper
mounting bolt and nut, but do not fully tighten.
2. Fit the generator lower mounting.
1. From below, reposition an d align the harness clip to
the generator lower mounting.

Exterior Lighting - Exterior Lighting
Description and Operation
A multi-function switch located on the left stalk of the steering column switch assembly permits selection of either parking
(side), headlamps, auto-headlamp or off. Selection of a particular mode provides the appropriate input to the body
processor module (BPM).
Where the auto headlamp function is incorporated, a light sensor in the interior rear view mirror monitors ambient light and
provides an input to the BPM. The BPM responds by switching the low beam headlamps on or off as appropriate for the
prevailing light conditions.
The front and rear fog lamp switch is located on the fascia outboard of the steering column.
Front Lamps

Headlamp assembly
Each headlamp assembly consists of tw o headlamp units. The dipped beam lamp unit is located outboard and the main
beam lamp unit located inboard also carries the front parking (side) lamp. Access for bulb replacement is from the engine
compartment.
ItemPart NumberDescription
1—Headlamp (dip beam)
2—Headlamp (main beam)
3—Front Parking (side) Lamp
4—Front Direction Indicator
5—Front Side Marker
6—Side Repeater Lamp
7—Fog Lamp

Module Communications Network - Communications Network
Description and Operation
Fuse Boxes and Relays (LH Steering)

Parts List
There are six fuse box assemblies per vehicle, five of which have conventional, replaceable fuses. The High Power Protection
Module does not have conventional fuses, it comprises three 250 Amp fusible links to protect the starting circuit (two
connected in parallel) and the battery positive supply to the other fuse boxes.
Wiring Harnesses
ItemPart NumberDescription
1—Engine and Transmission Cont rol Module Compartment Relays (RH Steering opposite)
2—Front Firewall Relays
3—Front Seat Relays - Right Hand Side
4—Heelboard - Right Hand Side
5—High Power Protection Module
6—Trunk Fuse Box
7—Heelboard - Left Hand Side
8—Front Seat Relays - Left Hand Side
9—Engine Management Fuse Box
10—Engine Compartment Fuse Box
11—Engine Compartment Front Relays

Location of J1962 socket
The J1962 socket is located at the driver side inboard footwell.
Fuse Box Details

Engine Compartment Fuse Box
2—Power Steering Link
3—Engine
4—Front Axle
5—Engine Management
6—Console
7—Seat
8—Cabin
9—Rear Electric Seat Link (optional)
10—Trunk
11—Rear Axle
12—ICE
13—Fascia
14—Forward
Fuse NoRating (amps)Circuit
110Transmission control module.
25Screen heaters relay, alternator regulator.
310Security sounder, headlamp levelling, ignition coils +Ve, fog lamp switches.
45ABS control module.
510Adaptive damping, starter relay coil, engine management control module and relays.
610Right-hand low beam headlamp.
730Power wash pump.
810Left-hand low beam headlamp.
910Security sounder.
10-Not used.
1110Right-hand horn.
1230Radiator cooling fans series/right-hand fast.
1310Left-hand horn
1430Cooling fans left-hand fast.
1510Air conditioning coolant pump.
1630ABS pump control.
1715Front fog lamps.
1830ABS pump motor.
1910Right-hand high beam headlamp.
20-Not used.
2110Left-hand high beam headlamp.
2230Wiper motor.

Engine Management Fuse Box

Heelboard Fuse Box - Right hand side
Fuse NoRating
(amps)Circuit
120Adaptive damping
215Intercooler water pump (Supercharger)
325Starter solenoid.
45Engine control module.
510Fuel injectors.
65Transmission control module
7-Not used.
810Air conditioning compressor clutch.
930Throttle motor.
105Engine control module, Park/Neutr al switch, cruise control VSV 1 and 2 (where fitted), EGR valves.
11-Not used.
1210Air flowmeter, VVT solenoids.
13-Not used.
1410HO2S sensor heaters (where fitted ), EVAP valve, ignition coils relay, throttle motor relay, AC
compressor clutch relay, radi ator fans control module, CCV.
1530Windscreen left-hand heater.
165Control module compartment cooling fan.
1730Windscreen right-hand heater.
1810Ignition coils, ignition amplifier.
Fuse NoRating (amps)Circuit
120Left-hand seat control module.
215Door lock relay, door locking actuators.
315Body processor module.
410Door mirror heaters, mirror foldback.
55Radio telephone.
610Air conditioning.
720Body processor module (column motor power).
85Rear window switchpack, passenger door switchpack.
95Passenger seat switchpack.