Diagnostic JAGUAR XJ6 1994 2.G Owner's Manual

12.1.5. ABS Components
Hydraulic Module
The hydraulic module is located under the bonnet adjacent
to the engine compartment firewall. It is secured within a steel mounting bracket at three securing points. All elec- tronic and power connections are made through one cable
loom connect ion.
The hydraulic pump
(1 Fig. 1) is a reciprocating two-circuit pump in which one brake circuit is assigned to each pump
circuit. The pump supplies adequate pressure and volume
supply to the brake circuits under anti
-lock braking condi- tions. The pump is driven by and electric motor (2 Fig. 1). The
pump housing incorporates two low pressure accumulators
and damping chambers for each brake circuit.
A modulator valve block
(3 Fig. 1) incorporates the ABS CM or ABS / TC CM (4 Fig. 1). Vehicles with traction control are
fitted with a throttle position actuator (5 Fig. I), which is an
electrical device controlled by the ABS 1 TC CM.
Valve blocks on vehicles without traction control comprise
six solenoid valves, three normally open (NO) inlet valves
and three normally closed
(NC) outlet valves. These valve
blocks have three outlet ports. Valve blocks on vehicles with
traction control comprise nine solenoid valves, four
NO inlet valves,four NC outlet valves and one special isolating valve.
Fig. 2 shows a hydraulic module for vehicles with traction
control. The valve block (2 Fig. 2) has four outlet ports (Indi- vidual control of the driven wheels).
A BS CM, A BS / TC CM
The ABS CM or ABS TCI CM locates beneath the modulator
valve block and is secured by
two screws. The CM houses
the solenoids which operate the inlet and outletvalves of the
modulator valve block. When fitted, the valve stems locate
in the
CM mounted solenoids. There is no electrical connec- tion between the CM and the modulator valve block. Fig. 3 shows an ABS TC 1 CM having nine solenoids.
The
CM functions include the following:
0 Providing control signals for the operation of ABS
and traction control solenoid valves
0 Calculating wheel speed from voltage signals trans- mitted by the wheel speed sensors
0 Monitoring of all electrical components
0 On Board Diagnostics (OBD): storage of possible fail- ures in a non-volatile memory.
The signals from the four wheel speed sensors are indepen
- dently processed by the ABS CM or ABSITC CM, calculating
numerical values which correspond directly to the wheel
speed. These values are converted into control signals for
pressure modulation during ABS control.
The ABS and traction control
are continuously monitored,
whilst the ignition is on,for possiblefaults and interruptions.
If a fault is detected, the module deactivates the ABS and
indicates this by lighting the ABS warning lamp. In a fault
condition, conventional braking is unaffected. The module
stores fault codes in a non
-volatile memory which can be
read via the OBD link.
U: For electrical diagnostic information on the ABS I traction control systems, refer to EDM, Section 12. Fia.
1
Fia. 2
Fin. 3 I
J70286
Issue 1 August 1994 X300 VSM

Body Components & Trim
13.1 GENERAL DESCRIPTION
This section covers the following areas of the vehicle body:
0 Battery cover
0 Carpets - passenger compartment, trunk
0 Console - including radio, glovebox
0 Doors -frames, sealing, locks, trim, glazing
0 Fascia
0 Fuel filler flap assembly
0 Footrest
0 Hood - liners, gas strut, locking,
0 Illuminated sunvisor - inc mirror
0 Interior trim - trim pads, finishers, veneers
0 Mirrors - internal, external
0 Rear parcel tray
0 Roof console
0 Roof lining (headlining)
o Seats -front, rear -
0 Seat belts - front, rear
0 Sliding roof
0 Steering column cowl
0 Underscuttle pad
Refer to Appendix
A4 - Body Systems & Body Repair for information relating to crash-damage repairs and to the fol- lowing external components: exterior trim, bumpers, windscreen and rear screen, closures and sealing.
Refer to Section 15, Electrical for details of the following motors and solenoids: driver's and interior mirrors, window
lift, sunroof, seat / headrest and locking mechanisms (doors, trunk and filler cap).
Refer to Section 15, Electrical and Electrical Diagnostic Manual (EDM) for details of the passenger and driver airbags.
X300 VSM 1 Issue 1 August 1994

Body Components & Trim d-!P
13.2
13.2.1 Doors, Description
Doors are of welded, mild steel frames welded to the door panels; sponge rubber primary and secondary seals are
mounted on the doors. Internal insulation is provided by a foam water shedder attached to the door by press fitting and doublesided adhesive tape.
Front and rear door armrests are attached to supports riveted to each door frame; the attaching screws are fitted
with access covers. Upper and lower trim pads and a door pocket are attached to each of the doors by clips and screws. multi-plug connectors are used to provide a means of connecting the guard lamps, window lift switches and loud- speakers, external mirror and regulator (front doors only), which are housed within the doors.
Central locking is provided subject to market variations: Dead Locking for UK
/ Europe and Driver only unlock for N America. Door locks are eight disc, bayonet fixing, barrels with integral lock / unlock switches. Keys include ‘in-key’
transponders which are programmed to the vehicle via the Jaguar Diagnostic System also operate the engine immobi
- lisation system.
CAUTION: When removing the door panel water shedder, a foam membrane attached to each door panel by a com- bination of pressfitting (upper area) and bydouble-sided tape (bottom area), it is important that the shed- der is refitted correctly to maintain the water seal.
It is advisable not to disturb the bottom (taped) portion of the water shedder unless absolutely necessary
- it is possible to unclip the top of the shedder and bend it over to gain access to the inner panel.
If
it is necessary to disturb the bottom attachment, eg to remove the water shedder from the door panel,
the existing water shedder must be discarded and a new one fitted to ensure that the seal is maintained.
On refitting, the new water shedder should be pressed onto the door panel at the top and then the adhes- ive tape backing strip peeled off to enable the shedder to be pressed home at the bottom.
DOORS AND FUEL FILLER FLAP
13.2.2 front and Rear Door Trim Pad Veneer Panel,
Renew
SRO 76.47.11
76.47.12
. Reposition the inner door handle. See Fig. 1.
Remove the inner handle escutcheon plate blanking plate.
Undo and remove the inner handle escutcheon plate se-
. Remove the plate and gasket.
. Carefully Undo and remove the veneer panel.
Undo and remove the retaining clip securing screws.
. Remove the retaining clip assemblies.
9 Place the veneer panel aside.
Place the new veneer panel to the front.
Fit the retaining clip assemblies.
. Fit and tighten the retaining clip securing screws.
. Fit and fully seat the veneer panel to the door.
. Reposition the inner door handle.
. Fit the gasket and plate over the inner door handle.
. Fit and tighten the escutcheon plate securing screw.
. Refit the blanking plate.
curing
screw.
Fig.
1
0
0
0
0
Issue 1 August 1994 2 X300 VSM

Climate Control Systems
0 Because HFC 134A is fully recycleable it may be 'cleaned' by the recovery equipment and re-used following
removal from a system.
0 Leak tests should only be carried out with an electronic analyzer which is dedicated to HFC 134A. Never use a CFC 12 analyzer or naked flame type.
0 Do not attempt to 'guess' the amount of refrigerant in a system, always recover and recharge with the correct
charge weight. In this context do not depress the charge or discharge port valves to check for the presence of
refrigerant.
14.1.3 Handling Lubricating Oil
0 Avoid breathing lubricant mist, it may cause irritation to your respiratory system.
0 Always decant fresh oil from a sealed container and do not leave oil exposed to the atmosphere for any reason
other than to fill or empty a system. PAG oil is very hygroscopic (absorbs water) and will rapidly become con-
taminated by atmospheric moisture.
PAG oil is
NOTcompatible with previously used mineral based oils and must NEVER be mixed (Fig. 1). Do not
re
-use oil when it has been separated from refrigerant, following a recovery cycle. Dispose of used oil safely.
14.1.4 System Maintenance
0 When depressurizing a system do not vent
refrigerant directlyto atmosphere, always use Jaguar
approved recovery equipment.
0 Always decant compressor oil from a sealed con- tainer and do not leave oil exposed to the atmosphere
for any reason other than to fill or empty
a system.
PAG oil is very hygroscopic and will rapidly become
contaminated by atmospheric moisture.
0 Plug pipes and units immediately after disconnection
and only unplug immediately priorto connection. Do
not leave the system open to atmosphere.
0 It is not necessary to renew the receiver drier when- ever the system has been 'opened' as previously ad-
vised - see note this page. However,if a unit or part
of the system is left open for more than five minutes,
it may be advisable to renew the receiver drier. This
guidance is based on
U.K average humidity levels;
therefore, locations with lower humidity will be less
critical to moisturecontamination of the unit.
It must
be stressed that there is not
a 'safe' period for workto
be carried out in: ALWAYS plug pipes and units im-
mediately after disconnection and only remove plugs
immediately prior to connection.
J82-387
Fin. 1
U: The receiver / drier MUST be renewed if the compressor has failed or if it is suspected that debris may be in
the system.
0 If replacement parts are supplied without transit plugs and seals DO NOT use the parts. Return them to your
supplier.
0 Diagnostic equipment for pressure, mass and volume should be calibrated regularly and certified by a third
party organization.
0 Use extreme care when handling and securing aluminium fittings, always use a backing spanner and take
special care when handling the evaporator.
0 Use only the correct or recommended tools for the job and apply the manufacturer's torque specifications.
Issue 1 August 1994 2 X300 VSM

Climate Control Systems
CL /MATE CONTROL SYSTEM 0 14*2 14.2.1 Description
The climate control system in the 1995 model year saloon has a centre mounted heater / cooler unit with separate
blower assemblies, one LH and one RH. Heating temperature control is effected by means of a coolant flow valve and
circulation pump.
For models fitted with air conditioning, cooling is provide by passing air through the evaporator, which is situated im
- mediately behind the heater / cooler case inlet ducts.
Electric motors with integral potentiometers are used to position
all flaps.
W: There are no vacuum operated components in the system.
14.2.2 Features
o Self diagnostic control system with error codes.
0 Actuator 'self check'.
0 Display element check.
m: These features will be helpful for initial trouble shooting and where Jaguar Diagnostic Equipment (JDE) is not
available.
0 'Soft touch' logic controls. 0
0 Serial link from panel to control module (NCCM).
0 LCD display for temperature, status and fan speed.
0 Variable fan speed, whether in automatic or manual mode.
0 Manual air flow distribution over-rides.
0 Compensated air flow with regard to vehicle speed.
0 Rear footwell outlets.
0 Rear face outlets.
0 Scavenge system closed circuit temperature control.
0 Heated front screen (where fitted).
x300 VSM 3

Climate Control Systems
14.3 CLIMATECONTROL PANEL
12 13 14 15 16
Fig. 1 Control layout (see key listing below)
The following description of the various control panel functions is provided as a brief over
-view to assist in function
checking. Further information concerning the control panel to component interface may be found in the fault finding
procedures (this section) or the Electronic Diagnostic Manual (EDM).
Iynfe: The system may be activated by any one of four commands. a) AUTO button item 1 1; b) DEFROST button item 12; c) NC button item 10; d) OFF switch item 1.
1. Combined push for OFF and rotary FAN SPEED control. The speed of the two fans is changed by clockwise (to
increase) or anti-clockwise rotation of the knob. Operation of the control, (push) OFF or (rotate) FAN over-rides
the AUTO selection and cancels the 'AUTO' display.
2. RECIRCULATE AIR push-on / push-off button and state lamp, used to prevent outside air being drawn into the
cabin. There are two modes:
a) Press and immediate release; provides timed recirculation of five
(5) minutes. b) Press and hold for two (2) seconds; 'latches' the mode until operator over-ride.
3. Temperature scale SELECTOR for Celsius or Fahrenheit.
4. FANS SPEED display bar graph.
5. TEMPERATURE numeric display for demand and exterior.
6. Selected temperature SCALE temperature numeric display.
7. EXTERIOR temperature option display.
Issue 1 August 1994 4 X300 VSM

Climate Control Systems
CONTROL MODULE FAULT & CONDITION SELF-ANALYSIS
0 14.6 14.6.1 System Health
The climate control system has a 'self-test' facility, accessible from the control panel. The self test sequence has two
basic modes:
0 System error information is stored in the A/CCM up to a maximum of five faults. Should a fault occur there will
be an audible 'beep' and the message 'Er' will be displayed on the control panel LCD for approximately five (5)
seconds after ignition on. Please note that this will happen only once in any ignition switch cycle. The error
source may be accessed by the procedure described in 'Self Test System Diagnosis', this section.
0 Panel communication check may be initiated by following the instruction in 'Self Test System Diagnosis', this
section.
Nsfe: Displayed error codes are NOT directly related to Jaguar Diagnostic Equipment (JDE) but more detailed fault
related information may be accessed using Portable Diagnostic Unit (PDU).
14.6.2 System Protection
Power to the compressor clutch may be cut should either the engine management or air conditioning control systems
detect certain conditions; these conditions may be caused by Fault or Demand and can be classified thus:
0 Engine coolant overheat,
0 Refrigerant excessive pressure.
0 Refrigerant, insufficient pressure or low charge weight.
0 Speed differential between compressor and crankshaft caused by belt slippage or compressor seizure (indi-
cated by A/C state lamp flashing once per second) - 12 cylinder engine only. This feature, 'lock sensing' is fully
explained
in the EDM.
Demand
0 Engine maximum power requirement
0 Electrical system drain at engine idle.
X300 VSM 9 Issue 1 August 1994

rl Electrical
15.1.6 Fire Hazard Infonnath
Thermal decomposition or combustion may produce dense smoke and other dangerous fumes which in fire situations
form
a highly toxic explosive.
In the event of fire the surrounding area must be evacuated and
all personnel kept well upwind of the area.
Full fire fighting protective gear and
a self contained breathing apparatus operating in the positive pressure mode must
be worn for combating fire. Material near fires must be cooled with water spray to prevent ignition.
Fires should be allowed to burn themselves
out if not threatening to life or property. If fire is threatening to life or prop- erty use copious quantities of water to extinguish.
15.1.7 Ventilath
Local exhaust ventilation designed by a professional engineer should be provided if vapours, fumes, or dusts are gen- erated whilst working with airbag module.
The latest issue of the manual for recommended practices on 'Industrial Ventilation' is available from the
ACGIH Com- mittee on Industrial Ventilation, PO Box 16153, Lansing, MI 48910, USA.
The need for local exhaust ventilation should be evaluated by a professional industrial hygienist.
15.1.8 Respiratory Precauth
To prevent the inhalation of dangerous fumes and dusts, an approved mask should be worn.
15.1.9 Eye Protection
Chemical protective goggles are recommended where there is a possibility of eye contact with the propellant.
Safety glasses with side shields are recommended for
all other operations.
15.1. I0 Protective Clothing
Approved protective gloves, overalls and shoes / boots should be worn.
15.1.1 1 Handling and Storage Precautions
Do not store airbag module near live electrical equipment or circuitry. Store in a dry environment at ambient tempera-
tures.
Good housekeeping and engineering practices should be employed to prevent the generation and accumulation of
dusts. Store in compliance with
all local state and federal regulations.
15.1.12 Driver And Passenger Airbag Modules Assembly / Removal / Service Instructions
Before starting work, ensure ignition switch is in 'IocK position, key is removed and negative terminal cable
is disconnected from the battery.
As the airbag is equipped with a back up power source and due to the risk of airbag being inadvertently
deployed, wait one minute or longer before starting work.
0 Disconnecting the battery cancels the memory for clock, radio, seats, mirrors, steering column and any other
components using battery power. Reset memory after work is completed.
0 Never use airbags from other vehicles, always use new parts.
0 After work is completed, reconnect battery and perform warning light check see diagnostic manual.
0 Never use electrical probes to check voltage or electrical resistance.
0 Disconnect the airbag before carrying out any work on, or in the vicinity of module, or when using electric weld- ing equipment.
0 Always ensure that battery negative has been disconnected for one minute or longer before commencing any
removal procedure.
EB
Issue 1 August 1994 4 X300 VSM

Electrical rl
15.2 INSTRUMENTS
15.2.1 General Description
The instruments measure, monitor and display data relevant to the vehicle’s performance. Data is received from
sensors positioned at various locations around the vehicle via two multi-pin sockets located at the rear of the
instrument panel and is than presented using three different visual display methods described as follows:
15.2.2 Analog Display
This is used to display road speed, engine speed, oil pressure, battery condition, fuel level and coolant temperature.
15.2.3 Indicator Lamps
These indicate the presence of any hazard /fault conditions or operational actions.
15.2.4 LCD (Liquid Crystal Disp/ay)
This single line, six digit seven segment display is normally used to display the odometer reading but can also be used
to display vehicle condition messages associated with particular warning lamps and trip computer information.
15.2.5 Transducers
These devices listed as follows transmit vehicle condition to the instruments:
0 Engine Coolant Temperature Transmitter
0 Low Coolant Level Probe
0 Oil Pressure Transmitter - AJ16N12
0 Fuel Gauge Tank Unit - AJlW12
Fault conditions and their causes displayed by the instruments and warning lamps are covered in more detail
by further information contained within the
Electrical Diagnostic Manual.
15.2.6 Instrument Panel, General
2 I I 3 1
1. 24 Way Connector 3. Identification Label 2. 4% Way Connector 4. Bulb Holder
Fig.
1 Instrument Panel, Rear View
X300 VSM Issue 1 August 1994 8
c

page e
Sub-Section Title SRO
A5.7 ............. System Testing ...................................................................... 77
A5.7.1
........... Locking (key) ....................................................................... \
17
A5.7.2 ........... Unlocking (key) .................................................................... 17
A5.7.3 ........... Locking / unlocking (key-ring transmitter) ............................................... 18
A5.7.4
........... Locking (key-ring transmitter) ......................................................... 18
A5.7.5
........... Unlocking (key-ring transmitter) ....................................................... 19
A5.7.6
........... Panic feature (key-ring transmitter only) ................................................ 19
A5.7.7
........... Centrallocking ..................................................................... 20
A5.7.8
........... Passivearming ...................................................................... 20
A5.7.9
........... Trunk release ....................................................................... \
20
A5.7.7
0 .......... Trunk valet isolate ................................................................... 20
A5.7.11
.......... Flushsillbuttons .................................................................... 20
A5.9
............. Pin-point Tests ...................................................................... 24
A5.8
............. Diagnostic
Sub-Routines ............................................................. 21
A5.9.1
........... Central locking switch ............................................................... 25
A5.9.2
........... Door ajar switches .................................................................. 26
A5.9.3
........... Door locks ........................................................................\
. 27
A5.9.4
........... Door lock actuators and switch ........................................................ 28
A5.9.5
........... Hood switch ....................................................................... \
29 e
A5.9.6 ........... Horns ........................................................................\
..... 30
A5.9.7
........... Inclinationsensor ................................................................... 31
A5.9.8
........... Intrusionsensors .................................................................... 32
A5 . 9.7 0 .......... Reader exciter coil and module ....................................................... 34
A5.9.12
.......... Sounder ........................................................................\
... 36
A5.9.14
.......... Trunk lid release switches ............................................................ 38
A5.9.15
.......... Valetswitch ........................................................................\
39
A5 . 10 ............ Inclination Sensor - Renew ...................................... 86.52.2 1 ............ 40
A5 . 12 ............ Intrusion Sensor - Renew ........................................ 86.52.20 ............ 41
A5 . 14 ............ Valet Switch - Renew ........................................... 86.52.08 ............ 41
A5.9.9
........... Key
barrel switches .................................................................. 33
A5.9.11
.......... Security active indicator .............................................................. 35
A5.9.73
.......... Trunk lid release actuator and relay .................................................... 37
A5 . 11 ............ Security and Locking Control Module (SLCM) - Renew ............... 86.52.01 ............ 40
AS
. 73 ............ Hand Transmitter Battery - Renew ................................ 86.52.28 ............ 41
A5 . 15 ............ Security Siren (12 Cyl) - Renew .................................. 86.52.03 ............ 42
A5 . 16 ............ Security Siren (6 Cyl) - Renew ................................... 86.52.03 ............ 42
A5 . 17 ............ Front Door Lock Assembly - Renew ............................... 86.25.45 ............ 43
A5 . 18 ............ Rear Door Lock Assembly - Renew ............................... 86.25.47 ............ 44
Trunk Lid Lock Actuator - Renew ................................. 86.25.49 ............ 44
Clock Module - Renew ......................................... 86.80.73 ............ 44
Reader Exciter Coil and Module - Renew ............................................... 44
e
A5 . 19 ............
A5.20 ............
A5.2 1 ............
e
X300 VSM Issue 1 August 1994 ii