1998 JAGUAR X308 Ground

M
easure the insulation resistance between EM012/016 and
ground EM010/023.
1
I
s the resistance > 10 MOHM?
Yes GO to G19
No Inspect harness / connectors EM012 and EM024 for corrosion,
bent / pushed back pins.
Repair as required an d reconnect plug(s).
GO to G20
G1
9: CHECK HARNESS SHORT CORE TO CORE

GO to H8
No

Renew O2 sensor. Reconnect plug(s)
GO to H7
H7
: STOP
Perform

appropriate service drive cycle and check for the
presence of DTC.
1
Has
the fault code cleared?
Yes STOP
No Contact Jaguar Service
H
8: CHECK FOR O2 SENSOR CONTINUITY
W

ith EM012 and EM024 disconnected, measure the
resistance between EM012/016 and EM024/002.
1
I
s the resistance < 0.5 OHM
Yes GO to H9
No Inspect harness / connectors EM012 and EM024 for corrosion,
damaged / pushed back pins.
Repair as required an d reconnect plug(s).
GO to H11
H9: O2
SENSOR SCREEN GROUND CONTINUITY

Wi
th EM012 and EM024 disconnected, measure the
resistance between EM012/022 and EM024/001.
1
I s
the resistance < 0.5 OHM?
Yes GO to H10
No Inspect harness / connectors EM012 and EM024 for corrosion,
damaged / pushed back pins.
Repair as required an d reconnect plug(s).
GO to H11
H 1
0: O2 SENSOR SHORT CIRCUIT TO GROUND

W
ith EM024 disconnected measur
e the insulation resistance
between sensor pin 001 and sensor body.
1
Repeat
for pin 002 and sensor body.
2
I

s the resistance > 10 MOHM?
Yes GO to H12
No Renew the O2 sensor and reconnect all plugs.
GO to H11
H1
1: STOP
Perform

appropriate service drive cycle and check for the
presence of DTC.
1
Has
the fault code cleared?
Yes STOP
No Contact Jaguar Service
H12: SI
GNAL GROUND 1 CONTINUITY

Wi
th EM010 and EM014 disconnected, measure the
resistance between EM010/023 and chassis ground EM008L.
1
I s
the resistance < 0.5 OHM?
Yes GO to H13
No Inspect harness / connector EM010 for corrosion, damage, or
pushed back pin.
Inspect ground stud EM008L for corrosion or damage.
Inspect harness / spli ce EMS36 for damage.
Repair as required an d reconnect plug(s).
GO to H14
H13: SI GNAL
GROUND 2 CONTINUITY

W
ith EM010 and EM014 disconnected, measure the
resistance between EM014/004 and chassis ground EM008L.
1
I
s the resistance < 0.5 OHM?
Yes GO to H15
No Inspect harness / connector EM014 for corrosion, damage, or
pushed back pin.
Inspect ground stud EM008L for corrosion or damage.
Inspect harness / spli ce EMS36 for damage.
Repair as required an d reconnect plug(s).
GO to H14
H1
4: STOP
Perform

appropriate service drive cycle and check for the
presence of DTC.
1
Has
the fault code cleared?
Yes STOP
No Contact Jaguar Service
H
15: CHECK FOR O2 SENSOR CONTINUITY

Wi
th EM012 and EM024 disconnected, measure the
resistance between EM012/016 and EM024/002.
1
I s
the resistance < 0.5 OHM?
Yes GO to H16
No Inspect harness / connecto rs EM012, and EM024 for
corrosion, damaged / pushed back pins.
Repair as required an d reconnect plug(s).
GO to H21
H 1
6: O2 SENSOR SCREEN GROUND CONTINUITY

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