1998 JAGUAR X308 gearbox

Connect the scan tool 1
Have the DTC(s) and freeze frame data been recorded?
Yes GO to E2
E2: CHECK O2 SENSOR HEATER CONTINUITY
Ignition switch to position 0 1
Disconnect EM023
Bracket on top of gearbox or Bulkhead rear of engine
2
Measure the resistance between EM023/001 and
EM023/002. 3
Is the resistance between 4 and 10 OHM?
Yes
GO to E3
No Renew O2 sensor. Reconnect plug(s)
GO to E7
E3: CHECK FOR O2 SENSOR FAILURE

Connect the scan tool 1
Have the DTC(s) and freeze frame data been recorded?
Yes GO to F2
F2: CHECK FOR LOW EXHAUST TEMPERATURE
Check the engine and exhaust system for normal running
temperature 1
Is the engine and exhaust sy stem up to normal running
temperature?
Yes GO to F3
No Rectify possible leaking exhaust manifold / catalyst,
general causes of an over ri ch mixture and engine cooling
system operation. Test the sy stem for correct operation.
GO to F8
F3: CHECK FOR O2 SENSOR HEATER CONTINUITY
Ignition switch to position 0 1
Disconnect EM023
Bracket on top of gearbox or Bulkhead rear of engine
2
Measure the resistance between EM023/001 and
EM023/002. 3
Is the resistance between 4 and 10 OHM?
Yes
GO to F4
No Renew O2 sensor. Reconnect plug(s).
GO to F8
F4: CHECK FOR O2 SENSOR FAILURE

Conne
ct the scan tool
1
Have the DTC(s) and fr

eeze
frame data been recorded?
Yes GO to H2
H2: CHECK
FOR LOW EXHAUST TEMPERATURE
Chec

k the engine and exhaust
system for correct operation
and normal running temperature
1
Is th
e engine and exhaust system operating correctly and up to
normal running temperature?
Yes GO to H3
No Rectify leaking exhaust manifold / catalyst, general causes of
an over rich mixture and engine cooling system operation and
test the system for correct operation.
GO to H7
H
3: CHECK FOR O2 SENSOR FAILURE
I

gnition switch to position 0
1
Di

sconnect EM024
Bracket on top o

f gearbox or
Bulkhead rear of engine
2
R
un the engine for a period to
warm the sensor and then
maintain a steady speed of approximately 2500 rpm.
3
W
ith EM024 disconnected, measure the voltage between
EM024/001 and EM024/002.
4
Is
the voltage between 600mV and 1.0 Volt?
Yes GO to H4
No Renew O2 sensor. Reconnect plug(s).
GO to H7
H
4: CHECK FOR O2 SENSOR FAILURE

Ex
haust System - Front Muffler4.0L SC V8 - AJ26
Re
mo
val and Installation
Remov
a
l
Installation
1. Ra
ise the vehicle on a ramp.

2. Separate the front muf f
ler flan
ge joints from the downpipe
catalytic converters.
Slac ken t
he flange nuts (left-hand and right-hand sides),
catalytic converter to front muffler.

3. Slacken the clamps (left-ha nd and right-hand sides),
i
ntermediate mufflers to front muffler.
Move both i
n
termediate mufflers rearwards, as far as
possible.
4. Remove the flange nuts (lef t-hand and right-hand sides),
catalytic converter to front muffler.

5. Re
move the bolts which secure th
e front muffler rear mounting
to the rear of the gearbox.
6. Remove the front muffler.
Di
sconnect the front muffler fr
om each downpipe flange.
Di
sconnect the front muffler
from the intermediate
mufflers and remove it.
7. Remove the gasket from each front flange joint.
8. Clean and inspect al l exhaust joints.
1. Fit the front muffler.

F
it the front muffler fully into
the intermediate mufflers.

2. Con
nect the front muffler flanges to the catalytic converters.
F

it a new gasket to each flange.
Con

nect the front muffler flanges to the catalytic
converters; move the front muffler / intermediate
mufflers assembly forwards.
Tigh
ten the flange nuts (left-hand and right-hand sides),
front muffler to catalytic converters.

3. F
it the bolts which secure the front muffler rear mounting to
the rear of the gearbox.

4. Re
position the intermediate mu
fflers to the front muffler to
align the correct referenc e / index indicator ring.
Ti
ghten the clamps (left-han
d and right-hand sides),
intermediate mufflers to front muffler.
5. Lower the ramp.

Seating - Front Seat Recliner Motor
Removal and Installation
Removal
1. WARNING: FOLLOWING DISCONNECTION OF THE
BATTERY A PERIOD OF AT LEAST ONE MINUTE MUST BE
ALLOWED TO ELAPSE BEFORE WORKING ON A FRONT SEAT WITH
A SIDE AIRBAG FITTED.
Remove battery cover and disc onnect ground cable from
battery terminal. Refer to 86,.15.19.
2. Remove front seat and position for access. Refer to 76.70.01.
3. Remove front seat back finisher. Refer to 76.70.09.

4. Release seat squab cover securing clips from frame.

5. Release seat squab cover lower edge retaining strip from
frame.

6. Disconnect recline motor/potentiometer harness multiplug
(white).
7. Remove and discard gearbox RH drive shaft end securing clip.

Installation

8. Using a suitable soft drift, release drive shaft from gearbox and potentiometer.

9. Slacken and remove bolts securi ng potentiometer/gearbox to
seat frame

10. Rotate potentiometer to release it from retaining plate tang.

11. Slacken and remove bolts securing recline motor to seat
frame.
12. Remove recline motor/potentio meter/gearbox assembly from
seat.
1. Position recline motor on seat frame mounting and fit and

tighten securing bolts.
2.
Position potentiometer on gearbox.
3. Engage drive shaft in po tentiometer and gearbox.
4. Install potentiometer retaining plate.
5. Rotate potentiometer to en gage retaining plate tang.
6. Fit and tighten retaining plate/gearbox securing bolts.
7. Fit and fully seat new gearbo x drive shaft securing clip
8. Fit seat cover RH side to seat frame and fully seat securing
clips.
9. Fit seat cover LH side to seat frame and fully seat securing
clips.
10. Fit seat cover to lower frame retaining strip.
11. Position seat for acces and fit seat back finisher. Refer to
76.70.09.
12. Install seat in vehicle. Refer to 76.70.01.
13. Connect ground cable to batt ery terminal and fit battery
cover. Refer to 86.15.15.
14. Motor seat fully forward and fully rearward, checking for
satisfactory operation.
15. Return seat to original position.