JAGUAR X308 1998 2.G Workshop Manual

With EM010 and EM012 disconnected, measure the voltage
between EM010/023 and EM012/016. 1
Is the voltage 0 (zero) V?
Yes GO to G17
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
G17: CHECK FOR SHORT TO B+

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

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

Pinpoint test H: P0160
Me
asure the insulation resistance between EM012/016 and
EM015/001.
1
I s
the resistance > 10 MOHM?
Yes Reconnect all plugs.
GO to G20
No Inspect harness / EM012, EM 015 and EM024 for corrosion,
bent / pushed back pins . Repair as necessary.
GO to G20
G2 0: END
Perform a
ppropriate service drive cycle and check for the
presence of DTC.
1
Has th
e fault code cleared?
Yes STOP
No Contact Jaguar Service
PI
NPOINT TEST H : P0160
T
E
ST CONDITIONS
D
E
TAILS/RESULTS/ACTIONS
H1
:
RETRIEVE DTCS
•
NOTE
: Battery and or ECM disconnection prior to scanning wi
ll erase all data, ensure that the correct DTC is present.

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

With
the conditions held as H3, suddenly decelerate to idle.
1
Has the voltage
d
ropped to 400mV or less ?
Yes Stop the engine
GO to H5
No Renew O2 sensor. Reconnect plug(s).
GO to H7
H5
: CHECK FOR O2 SENSOR FAILURE
Wi
th
the conditions held as H4, suddenly accelerate to
approximately 2500 rpm.
1
Has the
voltage risen to between 600mV and 1 volt?
Yes GO to H6
No Renew O2 sensor. Reconnect plug(s).
GO to H7
H6
: CHECK FOR O2 SENSOR FAILURE
W
i
th the conditions held as in H5, run the engine at 1500
rpm for approximately 3 minutes.
1
Does th e displayed voltage drop below 40
0mV and rise above 500
mV, cycling approximately every 180 seconds?
Yes

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