Page 1633 of 2490
W
ith EM012 and EM024 disconnected, measure the
resistance between EM012/022 and EM024/001.
1
I
s the resistance < 0.5 OHM?
Yes GO to H17
No Inspect harness / connectors EM012 and EM024 for corrosion,
damaged / pushed back pins.
Repair as required an d reconnect plug(s).
GO to H21
H
17: CHECK FOR SHORT TO B+
Page 1634 of 2490
Wi
th EM010 and EM012 disconnected, measure the voltage
between EM010/023 and EM012/016.
1
Is th e volt
age 0V?
Yes GO to H18
No Inspect harness / connectors EM010, EM012 and EM024 for
corrosion, damaged / pushed back pins.
Repair as required an d reconnect plug(s).
GO to H21
H1
8: CHECK FOR SHORT TO B+
Page 1635 of 2490
W
ith EM010 and EM012 disconnected, measure the voltage
between EM010/023 and EM012/022.
1
Is th
e voltage 0V?
Yes GO to H19
No Inspect harness / connectors EM010, EM012 and EM024 for
corrosion, damaged / pushed back pins.
Repair as required an d reconnect plug(s).
GO to H21
H
19: CHECK HARNESS SHORT TO GROUND
Page 1636 of 2490
Wi
th EM010, EM012 and EM024 disconnected, measure the
insulation resistance between EM012/016 and ground
EM010/023.
1
Is
the resistance > 10 MOHM?
Yes GO to H20
No Inspect harness / connectors EM012, EM024 for corrosion,
bent / pushed back pins.
Repair as required an d reconnect plug(s).
GO to H21
H20: CHECK HA RNESS SHO
RT CORE TO CORE
Page 1637 of 2490
M
easure the insulation resistance between EM012/016 and
EM012/022.
1
I
s the resistance > 10 MOHM?
Yes Reconnect all plugs.
GO to H21
No Inspect harness / connectors EM012, EM015 and EM024 for
corrosion, bent / pushed back pins.
Repair as required an d reconnect plug(s).
GO to H21
H2
1: END
Perform
appropriate service drive cycle and check for the
presence of DTC.
1
Has
the fault code cleared?
Yes STOP
No Contact Jaguar Service
Page 1638 of 2490
Exha
ust System - Catalyti
c Converter LH4.0L NA V8 - AJ27/3.2L NA V8 -
AJ26
Re mo
val and Installation
Remova
l
1.
Op
en the engine compartment and fit paintwork protection
sheets.
2. Remove the front muffler; refer to Operation 30.10.18 in this
section.
3. Re
move the centre trim panel
from the engine compartment.
1. Remove the left hand side enclosure panel.
2. Remove the centre trim panel.
4. Repo
sition the expansion tank from the mounting.
1. Disconnect the coolant level sensor connector.
2. Remove the nuts which secures the tank.
5. CAUT
ION: Note the position of the upstream and
downstream (where fitted) o xygen sensor multiplugs for
reassembly.
Disconnect the oxygen sensor multiplugs.
Di spl
ace the multiplugs from the engine mounting bracket.
Dis
connect the plug(s) from the oxygen sensor(s)
6.
Re
move the four nuts which se
cure the downpipe catalytic
converter to the exhaust manifold.
Page 1639 of 2490
I
nstallation
7.
R
aise the vehicle on a ramp.
8. R
emove the downpipe catalytic converter.
R
emove the bolts which se
cure the downpipe lower
mounting bracket.
Remove the
downpipe assembly.
9. R
emove the oxygen sensor(s).
The downstream sensor i
s fitt
ed only for North American
markets.
10. Remove gasket from the manifold flange.
Clean and inspect th
e manifold joint faces.
Clean and inspect th
e threads
on the downpipe studs.
1. Fit the oxygen sensor(s).
The downstream sensor i
s fitt
ed only for North American
markets.
Page 1640 of 2490
2. Fit a ne
w gasket to the mani
fold mating flange on the
downpipe.
3. Fit
the downpipe catalytic converter.
Fit the down
pipe assemb l
y to the manifold.
Fi
t,
but do not fully tighten, the mounting bracket securing
bolts. (Leave loose until the nu ts securing the downpipe to
the exhaust manifold are fitted.)
4. Lower the ramp.
5. Tighte
n the nuts securing the downpipe flange to the manifold
flange.
6. Connec t
the oxygen sensor multiplugs.
Con
n
ect the plug(s) to the respective (previously noted)
sensor(s).
Cor r
ectly position the multiplu
gs on the mounting bracket.
7. Fit the coolant header tank.
1. Reposition the tank and fit the securing nuts.