1998 JAGUAR X308 Ground

With EM012 and EM023 disconnected, measure the
resistance between EM012/014 and EM023/003. 1
Is the resistance < 0.5 OHM?
Yes GO to F14
No Inspect harness / connectors EM012 and EM023 for
corrosion, damaged / pushed back pins.
Repair as required an d reconnect plug(s).
GO to F19
F14: HEATED O2 SENSOR SCREEN GROUND CONTINUITY

With EM012 and EM024 disconnected, measure the
resistance between EM012/016 and EM024/002. 1
Is the resistance < 0.5 OHM?
Yes GO to G8
No Inspect harness / connecto rs EM012, and EM024 for
corrosion, damaged / pushed back pins.
Repair as required an d reconnect plug(s).
GO to G10
G8: O2 SENSOR SCREEN GROUND CONTINUITY

With EM012 and EM024 disconnected, measure the
resistance between EM012/022 and EM024/001. 1
Is the resistance < 0.5 OHM?
Yes GO to G9
No Inspect harness / connecto rs EM012, and EM024 for
corrosion, damaged / pushed back pins.
Repair as required an d reconnect plug(s).
GO to G10
G9: O2 SENSOR SHORT CIRCUIT TO GROUND

With EM024 disconnected measure the insulation resistance
between sensor pin 001 and sensor body. 1
Repeat for pin 002 and sensor body. 2
Is the resistance > 10 MOHM?
Yes GO to G11
No Renew the O2 sensor and reconnect all plugs.
GO to G10
G10: 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
G11: SIGNAL GROUND 1 CONTINUITY

With EM010 and EM014 disconnected, measure the
resistance between EM010/023 and chassis ground EM008L. 1
Is the resistance < 0.5 OHM?
Yes GO to G12
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 G13
G12: SIGNAL GROUND 2 CONTINUITY

With EM010 and EM014 disconnected, measure the
resistance between EM014/004 and chassis ground EM008L. 1
Is the resistance < 0.5 OHM?
Yes GO to G14
No Inspect connector EM014 for co rrosion, 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 G13
G13: 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
G14: CHECK FOR O2 SENSOR CONTINUITY

With EM012 and EM024 disconnected, measure the
resistance between EM012/016 and EM024/002. 1
Is the resistance < 0.5 OHM?
Yes GO to G15
No Inspect harness / connecto rs EM012, and EM024 for
corrosion, damaged / pushed back pins.
Repair as required an d reconnect plug(s).
GO to G20
G15: O2 SENSOR SCREEN GROUND CONTINUITY

Wi
th EM010 and EM012 disconnected, measure the voltage
between EM010/023 and EM012/022
1
Is th e volt
age 0 (zero) V?
Yes GO to G18
No Inspect harness / connectors EM010, EM012 and EM024 for
corrosion, damaged / pushed back pins.
Repair as required an d reconnect plug(s).
GO to G20
G18: CH
ECK HARNESS SHORT TO GROUND