module JAGUAR X308 1998 2.G Workshop Manual

Interior Lighting - Interior Lighting
Description and Operation

Parts List
Glovebox lamp
The glovebox lamp operates whenever the glovebox door is opened. The lamp comprises a combined switch and bulb holder assembly. The bulb aperture in the glovebox is covered by a white lens.
Door guard/puddle lamps
A door guard/puddle lamp, fitted to the rear lower corner of each door, operates automatically whenever the corresponding
door is opened. Each lamp assembly has a double lens; red to project rearwards to warn oncoming traffic that the door is
open and white to illuminate the passenger 'step-out' area.
Front courtesy/ map lamps
The roof console comprises a module with integral switches which permits operation of the dr iver and front passenger
courtesy and map lamps.
Where appropriate, the module also controls operation of the su n roof and garage door opener.
ItemPart NumberDescription
1—Glovebox Lamp
2—Door Guard / Puddle Lamp
3—Luggage Compartment Lamp
4—Sun Visor Vanity Mirror Lamp
5—Roof Console Map / Courtesy Lamp
6—Rear Quarter Reading / Courtesy Lamp

Rear courtesy/ reading lamps
Each rear quarter of the passenger compartment is fitted with combined lighting units comprising; a rear courtesy lamp and
reading lamp. The courtesy lamps operate automatically whenever a rear door is opened; the reading lamps function when
the integral switches are operated by occupants of the vehicle.
Trunk lamps
The trunk trim panel is fitted with lamps which operate auto matically whenever the trunk lid is opened; the switch is
incorporated within the latch mechanism.
Vanity mirror lamps
The vanity mirror lamps, two on each sun visor, operate auto matically when the mirror flap is opened, provided the sun
visor spindle is engage d in the stowage clip.
Operation
The BPM provides an enable signal for the glovebox, vanity mirror, trunk lid and map lamps. Actuation of the relevant
switch provides an earth path to the lamp.
The rear passenger reading lamps receive a supply di rect from fuse F10 in the RH heelboard fuse-box.
The front and rear courtesy lamps have separa te fade functions controlled by the BPM.
The door hazard / puddle lamps are controll ed locally by the relevant Door Module.
Fault analysis must be undertaken using the PDU, refer to Diagnosis and Testing.
Refer to the relevant Electrical Guid e for details of circuit operation.

Interior Lighting - Interior Lighting
Diagnosis and Testing
Tests Using the Portable Diagnostic Unit
Refer to PDU User Guide
The complexity of the electronics involved with the various Electronic Control Modules and the multiplexed communication
networks, preclude the use of workshop general electrical test equipment. Therefore, reference should be made to the PDU
User Guide for detailed inst ructions on testing the interior lamps and circuits.
The PDU systematically tests and analyses the lamp assemblies, the bulbs and the electrical connections to them. It should
be noted that the lamps are not wired directly to the switches.
The lamps are controlled directly by the Bo dy Processor (it has a sufficient number of high power output stages to drive the
lamps / relays compared to other module s) except for the door guard / puddle lamps and the rear passenger reading lamps.

The Body Processor Module receives messages on the SCP network from the door modules relating to door ajar / closed /
locked status, sensed by the door courtesy switch(es).
Where a fault involving a lamp is indicated by the PDU, be fore replacing suspect components, some basic diagnostic
methods may be necessary to confirm that connecti ons are good and that wiring is not damaged.

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.

Heelboard Fuse Box - Left hand side

Trunk Fuse Box
105Radio telephone, rear courtesy lamp/map light.
1120Air conditioning right-hand blower relay.
125In-car entertainment.
1325Right-hand rear door control module.
1425Cigar lighters.
1525Right-hand door control module.
16-Not used.
1715Sunroof.
1825Right-hand and left-hand seat heaters.
Fuse NoRating
(amps)Circuit
120Right-hand seat control module.
25Rear window switchpack, driver door key ba rrel, driver door switchpack and memory.
35Dimmer module.
45Diagnostic connector.
515Body processor module.
65Centre console switchpack, reader exciter ECM
715Body processor module (battery supply for solenoids, lamps and motors).
85Steering column adjust switch, driver seat switchpack.
910Radio/cassette head unit.
105Airbag/SRS
1120Air conditioning left-hand blower motor.
1210Door mirror heaters relay, air conditioning, blow er motor relays, power steering control module.
1325Left-hand rear window
1410Cruise control switch, instrument cluster, catalytic converter over temperature warning.
1525Left-hand door control module.
165Electrochromic interior mirror (where fitted), centre console switchpack, gear selector, traction control
switch illumination, J-gate mode switch illumination, pins A9 and D8 trunk fusebox.
1710Accessory supply.
185Instrument cluster.
Fuse Rating

Relay Details

Engine Compartment Fuse Box Relays
No(amps)Circuit
110Security and locking control module (Reversing lamps, rear fog lamps, stop lamps, electrochromic
mirror).
25Fuel filler flap.
310F16 left-hand heelboard (where fitted).
45Diagnostic connector.
55Right-hand and left-han d seat timer (rear).
6-Not used.
720Fuel pump.
810High mounted stop lamp, caravan/trailer stop lamps
910Antenna motor.
1010Security and locking control module (trunk release, caravan/trailer direction indicators, fuel filler
flap relay).
1110Accessory sockets.
1215In-car entertainment power amplifier.
13-Not used.
14-Not used.
1520Fuel pump (supercharger, where fitted).
1620Caravan/trailer connector.
1725Heated rear screen.
1820Rear seat movement.
195Right-hand side lamps, left-h and and right-hand number pl ate lights, caravan/trailer.
2020Rear seat movement.
215Left-hand side lamps, left-hand and right-hand sidemarker lights, caravan/trailer.
2220Rear seat heaters.
Relay NoColorCircuit
1BrownAir conditioning coolant pump
2BrownFront fog lamps
3BrownHeadlamps - high beam
4BrownHeadlamps - power wash pump (where fitted)
5BrownHeadlamps - low beam
6BrownHorns
7BrownIgnition +

Engine Management Fuse Box Relay

Engine Compartment - Front Relays

Engine and Transmission Control Module Compartment Relays
Relay NoColorCircuit
1BrownEMS control relay
Relay NoColorCircuit
1BlackWindshield wiper fast/slow
2BlackWindshield wiper on/off
Relay NoColorCircuit
1BlueSC coolant water pump
2BrownFuel injection main
3BrownIgnition coils
4BrownThrottle motor
5BrownStarter solenoid
6BrownAir conditioning compressor clutch

Module Communications Network - Battery Junction Box (BJB)
Removal and Installation
Removal

1. Disconnect battery ground cable; refer to 86.15.19.

2. Remove cover from fuse box.
1. Release securing tangs.
2. Remove cover.

3. Remove positive supply power cable.
1. Displace cover.
2. Remove nut.
3. Disconnect cable.

4. Displace fuse box from mounting panel for access.
1. Release securing latch, upwards.
Release fuse box from mountin g panel by displacement
towards spare wheel.
5. Remove fuse box.
1. Identify and disconne ct harness connectors.