Fuse boxes JAGUAR X308 1998 2.G Workshop Manual

The il
lustration above is a simplified expl
anation of how the starting system operates in conjunction with the Body Processor
Module (BPM) and the Engine Control Module (ECM).
Refer to the Starting Circuit Diagram in the Electrical Guide.
I g
nition Switch to ON Position
W
h
en the ignition key is set to the normal run position, the following sequence occurs:
The
is
olation relay in each fusebox is
energised to supply battery power to the fuses and associated circuits.
The BPM 'IGN
ON' terminal
is taken to 0V by the ignition switch.
The BPM
checks that various parameters are correct e.g. -
inertia switch is in the active condition - transmission is in
PARK - security system has been correctly disabled.
It e
m
De
scr
iption
1Batt
ery
2To Re ar
Fusebox
3Hi
gh Power Pr
otection Module
4To Front
Fu
seboxes
5Starter Re
lay
6Body Processor M
odule (BPM)
7Engine
C
ontrol Module (ECM)
8Ignition Switch
9CRANK Signal
10Ignition ON Signal
11Inertia Switch
12St
arte
r Motor and Solenoid
Starting System Operation

Belt tension is achieved by an automatic tensioner; neither the belt nor the tensioner require service apart from checking
the belt wear indicators at each normal service interval.
The minimum service life of the drive belt is 100,000 miles.
Never apply oil to the belt or to the belt tensioner.
Generator - Charging Circuit

Parts List
The main components of the charging system are shown above.
The output from the generator 'B+' main te rminal passes to the battery via the main terminal on the starter motor and then
the power cable to the high power protection module located in the luggage compartment. From this module, a short main
power cable supplies the ba ttery positive terminal.
The return circuit is through the vehicle body and supplementary ground cables.
The high power protection mo dule comprises four fuses, each rated at 250 Amps.
Battery output uses the same power cable as the charging circ uit, to the high power protection module and to the starter
motor main terminal. Two similar cables, but not such a high rating, supply battery power from the high power protection
module to the fuse box in the luggage compartment an d to the fuse boxes at the front of the vehicle.
ItemPart NumberDescription
1—Generator
2—Suppression Module
3—Starter Motor
4—Battery
5—Power Cable to Rear Fuse Box
6—High Power Protection Module
7—Power Cable to Front Fuse Boxes

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

Installation




6. Remove fuses and relays.
1. Note position of each relay and remove them.
2. Identify each fu se and remove them.
The value and position of each fuse is illustrated on the lid
of the trunk compartment fuse box - for all fuse boxes on
the vehicle.
1. Installation is reverse of removal.
2. Reconnect battery ground cable; refer to 86.15.15.

Module Communications Network - Central Junction Box (CJB) Removal and Installation
Removal
Installation



1. Disconnect battery ground cable; refer to 86.15.19.
2. Remove heelboard trim panel.

3. Remove positive supply power cable and displace fuse box.
1. Displace cover.
Remove nut which secures posi tive cable to fuse box.
2. Disconnect cable.
3. Remove nuts.

4. Remove fuse box.
Identify and disconnect harness connectors.

5. Remove fuses and relay.
1. Remove relay.
2. Identify each fuse and remove them.
The value and position of each fuse is illustrated on the lid of the
trunk compartment fuse box - for all fuse boxes on the vehicle.
1. Installation is reverse of removal.
2. Reconnect battery ground cable; refer to 86.15.15.

Installation


1. Note position of each relay and remove them.
2. Identify each fu
se and remove them.
The value and position of each fuse is illustrated on the lid
of the trunk compartment fuse box - for all fuse boxes on
the vehicle.
1. Installation is reverse of removal.
2. Reconnect battery ground cable; refer to 86.15.15.

Installation



1. Release securing tangs and remove cover.
2. Remove relay.
3. Identify each fuse and remove them.
The value and position of each fuse is illustrated on the lid
of the trunk compartment fuse box - for all fuse boxes on
the vehicle.
1. Installation is reverse of removal.
2. Reconnect battery ground cable; refer to 86.15.15.