1998 JAGUAR X308 sensor

pipe.
3
. Tie the drain pipe to th
e filler tube using a ratchet
strap. Trim strap.

10
.
Reconnect the trunk harness connections.
1. If fitted, connect the wi ring to the accelerometer.
2. Connect the wiring to the fuel level sensor harness.
3. Connect the wiring to th e fuel pump connector.
4. If fitted, connect the wiring to the pressure sensor connector.

11
.
Reconnect the lefthand side trunk harness if it has been
necessary to move it for access. Route the harness behind both
the filler tube and breather or pressure relief pipe.
1. Fit the harness securing cl ip to the mounting bracket.
2. Connect the fuel flap lock actuator connector.
3. Connect the lefthand rear lamp harness connector.
4. If applicable, feed the side marker lamp harness through the access hole in the floor and reseat the
sealing grommet.
On
the underside of the vehicl
e, fit the side marker lamp
connector and fix the harness to the securing clips.

12
.
On the underside of the vehicle, fit the drain pipe to the
securing clip.
13. On the underside of the vehicle, reconnect the fuel feed and
return pipes.
R
emove the plugs from the tank
and fuel feed and return

Accelerati
on Control - Accelerator Cable Adjustment
Gen
eral Procedures

1.
Load the Approved Jaguar Diagno stic System with power train
data logger.
2. Connect the Approved Jaguar Diag nostic System to the vehicle.

3. W
ith 'Disable Network Integrity Test - YES/ NO' displayed on
the screen select YES.
4. With new menu displayed on the screen, select ' Engine
Management'.
5. Turn the ignition to ON.
R
emove any previously selected data logger parameters.
6. On data logger select PPS11 an d PPS2 (Pedal demand sensors
1 and 2).
7. On Sedan models only, remove the bulkhead covers on both
sides and the engine compartment rear cover.
8. Cut, remove and discard the ra tchet strap which retains the
throttle cable to the abutment bracket.
9. Ensure there is no tension on the throttle cable by releasing
the throttle cable adjustment nut from the abutment bracket.
10. Record the voltages for both sensors, PPS11 and PPS2.
11. Partially insert the throttle cable adjustment nut into the
abutment bracket.
12. Recheck the voltages for both sensors, PPS11 and PPS2.
13. Where the voltages at step 12 are higher than the voltages
taken at step 10, contin ue to step 15 below.
14. Where the voltages at step 12 are the same as the voltages
taken at step 10, contin ue to step 16 below.
15. Rotate the adjustment nut clockwise (as viewed from the
front of the vehicle) until the same voltages are indicated as in
step 10. Continue to turn thro ugh a part revolution until the
sides of the nut are vertical. Tu rn through a further 90 degrees,
then fully insert the nut into the abutment bracket.
16. Rotate the adjustment nut anti-clockwise (as viewed from the
front of the vehicle) until the indicated voltage starts to
increase. Then rotate the nut clockwise through a part
revolution until the sides are ve rtical. Turn through a further 90
degrees, then fully insert the nut into the abutment bracket.
17. Fit a new ratchet strap to secure the throttle cable adjusting
nut to the abutment bracket.
18. Operate the throttle pedal through 20 full cycles to settle the
cable. Check the voltages now shown, remain the same as in
steps 15 and 16.
19. Check and where necessary adjust the kickdown switch. For
additional information, refer to Section 307
-05A Automatic Transmissi
on/Transaxle External Controls
Sectio
n
307
-05
B
Au

tomatic Transmission/Tra
nsaxle External Controls
.
20
.
On Sedan models only, refit the engine compartment rear
cover and the bulkhead co vers on both sides.
21. Switch the ignition OFF and disconnect the Approved Jaguar
Diagnostic System.

Sym
ptom #2
Sy
mptom #2
Sym

ptom #3
Sy
mptom #3
No
cooling
Compressor sei
zed
Compressor seal failure
Compressor valve or piston damage
*
*
*
R
enew compressor
*
Compressor cl
utch / circuit faulty
*
R
efer to PDU
*
D
rive belt slack / broken
*
Adjust or r
enew
*
B
lower motor / circuit faulty
Pressure switch / circuit fault
*
*
R
efer to PDU
*
Total l
oss of refrigerant caused by broken pipe or joint
*
Repair / renew. Check code 2
3
*
P
artial loss of refrigerant caused by leaking joint or pipe
*
R
epair / renew, check fault code #23
*
Conden
ser damage
*
Re
new, check fault code #23
*
Bl
ocked receiver / drier filter
*
R
enew receiver / drier
*
Evaporator senso
r / circuit faulty
*
R
efer to PDU, check fault code #13
*
Bl
ocked pollen filter (if fitted)
*
Cle
an or renew
*
• NOTE: Should a leak or low refrigerant be established as the cause of INSUFFICIENT COOL ING, follow the procedures
Recovery / Recycle / Recharge, this section, and ob serve all refrigerant and oil handling instructions.
Sy
mptom
Possib
le Sources
Acti
on
Insuffi

cient
cooling
Compre
ssor clutch slipping
*
R
enew clutch assembly
*
Fl
aps or vents closed / seized
*
Check f
ault codes #41 to 46
*
Bl
ower circuit fault
*
R
efer to PDU
*
Bl
ocked condenser matrix / fins
*
Check hig
h / low side pr
essures / renew. Check /
clean fins
*
Bl
ocked evaporator matrix
*
Check hig
h / low side
pressures / renew
*
Bl
ocked pollen filter (if fitted)
*
Cle
an or renew
*
Evaporator temp
erat
ure sensor faulty
*
R
efer to PDU
*
P
artial loss of refrigerant caused by leaking joint

or pipe
*
R
epair / renew
*
Blocked expan
sion valve
*
Check hig
h / low side
pressures / renew
*
Expans
ion valve fault
*
Chec
k system pres
sure differential
*
C
ollapsed air conditioning hose hose
*
Check hig
h / low side
pressures / renew
*
Moi
sture or air in the system
*
Chec
k system pressures
*
Low r
efrigerant charge
*
Initiate recovery
procedure, check fault code #23
*
Coo
lant flow valve open
*
Chec
k operation
*
Sy
mptom
Possib
le Sources
Acti
on
Int

ermittent cooling
Compre
ssor clutch slipping
*
R
enew clutch assembly
*
Compressor cl
utch circuit faulty
Blower(s) circuit faulty
*
*
R
efer to PDU
*
Motorized in-car aspirator faulty

*
R
efer to PDU, check fault code #11
*
Evaporator temp
erature sensor faulty

*
R
efer to PDU, check fault code #13
*
Bl
ocked condenser matrix / fins
*
Check hig
h / low side pressures / renew. Check / clean fins

*
Bl
ocked evaporator matrix
*
Check hig
h / low side
pressures / renew
*


Sym
ptom #1
Sy
mptom #1
Sy

mptom
Possib
le Sources
Acti
on

Engine speed (valve closed with the engine not running) Demand (set) temperature In-car temperature sensor Solar sensor
Re-heating of the refrigerated air is contro lled by the time that the water valve is open (i.e. not energised) over a six secon d
interval. The duty cycle of the water valve, the time open / time closed, is controlled by the A/CCM.
Maximum heating demand will cause the water valve to be fu lly open (not energised) to allow maximum coolant flow
through the heater matrix.
At Maximum cooling, the water va lve will be fully closed (energised) to prevent hot (engine temperature) coolant entering
the heater circuit; the pump however will continue to circulate coolant through both the heater matrix and water valve
bypass.
The water valve defaults open when the ignition is OFF.
Under engine stall conditions, when ignition is ON, the water valve will be open.
Water Pump Assembly
Located in the same area as the water valve, the water pump continually circulates coolant through the heater matrix
except when the conditions below apply:
The engine coolant is below 16°C. The ignition is OFF. Under engine stall conditions, when ignition is ON. Control panel OFF
Non return valves
The heater bypass hose has a non-return valve, located between the engine feed and return hoses. The valve prevents the
water pump from recirculating coolant fro m the heater at low engine speeds.
The flow indicator arrow embossed on the valve bo dy MUST point towards the coolant header tank.
CAUTION: Coolant flow will be compromi sed if either valve is fitted incorrectly. Observe the correct direction.
A second non-return valve is located betw een the water pump and water valve. This valve prevents hot coolant from flowing
into the heater with the engine switched off. The flow indicator arrow MUST point towards the water pump.
Heater feed and return hoses
The heater feed and return hoses are connected to the engine feed and return hoses by 'Quick-Fit' connection unions. The
feed hose has a Norma R20 connector and the return hose a Norma push and seal connector. The coolant system bleed
joints have Cobra clamps. All remaining hose connections have spring band hose clamps.
The engine feed hose is connected to the engine bypass hous ing and the engine return hose is connected to the engine
water pump.
Clamp Identification

Air Conditioning - Air Conditioning
Description and Operation
Introduction

Parts List
The climate control system features fully automatic control of temperature, blower speed (airflow) and air distribution to
maintain optimum comfort under most driving conditions.
Manual controls are provided to allow the operator to over-ride automatic operation.
System Features
ItemPart NumberDescription
1—Fascia panel with integral ducting
2—Heater / cooler assembly
3—A/CCM
4—Blower LH and RH
5—Plenum
6—Control panel
7—Solar sensor
8—Assembly valve - water
9—Assembly pump - water
10—Temperature sensor - external
11—Compressor
12—Pressure switch - 4 level
13—Motorized in-car aspirator (LHD shown)
14—Receiver drier
15—Condenser

Twin blower assemblies Center mounted evaporator, heater and air distribution unit Electric solenoid water valve controlled heating Electric water pump assembly Servo motor driven air distribution flaps Dedicated side glass defrost / demist vents External temperature sensor Motorised in-car aspirator Solar sensor
Electronic Control Panel
Liquid Crystal Display (LCD) Digital temperature display Manual fan speed level External temperature display Celsius / Fahrenheit selection Heated windshield switch (where fitted) Heated backlight switch Defrost switch Manual airflow distribution overrides (4) Access to self diagnostic system and error codes
Sensors
External ambient temperature sensor Motorized in-car aspirator Heater matrix temperature sensor Evaporator temperature sensor Solar sensor
These sensors feedback information to the Air Conditioning Control Module (A/CCM) which automatically adjusts air
temperature, airflow volume and distributi on from the air conditioning unit to maintain a stable passenger compartment
average temperature under changing weather conditions.
Major Components

Parts List
The air conditioning unit houses the evap orator, heater matrix and their temperatur e sensors. The unit also incorporates
two servo motor operated air distribution flaps which regulate airflow to the front and rear footwells and the quantity of
airflow through the cool air bypass (air which by-passes he ater matrix) up to the upper air distribution box (ADB).
When the footwell flap is open, air is du cted to the front and rear footwell areas via the lower air distribution duct (LADD)
and appropriate ducts. The LADD is clipped to the bottom of the air conditioning unit case an d the front foot ducts clipped
onto the outlets of the LADD.
Condensate (water) which forms on the evaporator fins is drained out of the unit case through two drains, located either
side of the unit underneath the evaporator. The liquid is routed to the vehicle exterior via flexible tubes which are located
behind the firewa ll heatshield.
Refrigeration Cycle
ItemPart NumberDescription
1—Air inlet - LH (RH opposite, not shown)
2—Servomotor - cool air bypass
3—Servomotor - footwell outlet
4—Air outlet - footwell
5—Air outlet - ADB (with foam seal)

Air Conditioning - Evaporator Core
Removal and Installation
Removal
1. Remove heater / cooler unit; refer to 82.25.21.

2. Remove air conditioning control module from heater / cooler
unit.
Slacken upper fixing.
Remove lower fixings.

3. Remove evaporator pipe firewall seal plate.
Remove screws.
Remove plate.

4. Disconnect heater matrix temperature sensor.
Detach heater matrix temperature sensor connector from
unit.
Disconnect connector.

5. Remove footwell servo motor from heater / cooler unit.
Disconnect connector.
Remove screws.
Remove motor complete with bracket.
6. Disconnect evaporator sensor connector.