1998 JAGUAR X308 DTC

Connect
the scan tool
1
Have the DTC(s) and fr
eeze f
rame data been recorded?
Yes GO to A2
A2: CH
ECK FUSE / RELAY
Check that fuse F
12 i
s good
and that EMS control relay is
energized
1
OK ?

Yes GO to A3
No Rectify as required
A3: CH
ECK VVT COIL RESISTANCE

Pin
point test B: P1393 (P1398) VVT solenoid circuit high input
W
ith EM014 disconnected, measure the resistance
between EM014/009 and ground EM016L
1
I
s the resistance < 0.5 OHM?
Yes Reconnect EM014, EM015, PI031 or (PI032)
GO to A6
No Inspect harness / connector EM014, ground stud and
splice EMS37 for corrosion, damage, bent or pushed back
pins and repair as required. Test the system for normal
operation.
A6
: 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
P
INPOINT TEST B : P1393 (P1398) VVT SOLENOID CIRCUIT HIGH INPUT
•
NOTE: References in brac
kets are for Bank B (2)
T
EST CONDITIONS
D
ETAILS/RESULTS/ACTIONS
B1

: RETRIEVE DTCS
•

NOTE: Battery and or ECM disconnection prior to scanning wi
ll erase all data, ensure that the correct DTC is present.

Connect
the scan tool
1
Have the DTC(s) and fr
eeze f
rame data been recorded?
Yes GO to B2
B2 : CH
ECK VVT COIL CONTINUITY
W
i
th VVT connector PI031 - A bank or (PI032 - B bank)
disconnected, measure the resistance between the pins 1
and 2 at the VVT actuator
1
I s
the resistance >20 OHM?
Yes Renew the VVT solenoid and te st the system for normal
operation.
No GO to B3
B3: CHECK
SHORT TO B+

Pinpoint test C: P1396
VVT solenoid malfunction
W
i
th EM015, EM014 PI031 and PI032 disconnected,
measure the insulation resistance between EM015/009
and EM015/008
1
I s
the resistance > 10 MOHM?
Yes Reconnect all connectors
GO to B7
No Inspect EM015 and PI031 (PI032) for corrosion, bent /
pushed back pins or locate and repair the harness /
connector PI001/016 (PI001/027). Test the system for
normal operation.
B7: EN
D
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
PINPOINT TES
T C : P1396 VVT SOLENOID MALFUNCTION
T
E
ST CONDITIONS
D
E
TAILS/RESULTS/ACTIONS
C1
: RETRIEVE DTC
S
•
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 C2
C2
: CHECK VVT COIL CONTINUITY
Wi

th VVT connector PI032 disconnected, measure the
resistance between the pins 1 and 2 at the VVT actuator
1
I
s the resistance >20 OHM?
Yes Renew the VVT solenoid and te st the system for normal
operation.
No GO to C3
C3
: CHECK SHORT TO B+

W
ith EM014 disconnected, measure the resistance
between EM014/009 and ground EM016L
1
I
s the resistance < 0.5 OHM?
Yes Reconnect EM014, EM015, PI031 or (PI032)
GO to C10
No Inspect harness / connector EM014, ground stud and
splice EMS037 for corrosion, damage, bent or pushed
back pins and repair as required. Test the system for
normal operation.
C9
: CHECK MECHANICAL CONDITION
R

emove the VVT(s) and ensure
that there is no foreign
matter blocking the oil passageway
1
OK
?
Yes GO to C10
No Rectify as required
C
10: 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

Engine Cooling - Engine Cooling
Diagn
osis and Testing
Related Faults / Codes

Adaptive
Fue
ling
Sym
p
tom Chart
Sy
m
ptom Chart
S
p
ecial Tool(s)

D
i
gital multimeter

Generi
c scan tool
Conditi
on
Possib
l
e Source
Acti
o
n
D
T
C P0171 System too lean bank
1 (A)
D T
C P0174 System too lean bank
2 (B)
Fuel delivery blockage Fu
el delivery pressure (low)
F
a
ulty injector (blocked)
Ai
r i
ntake system leak
F
u
el injector electrical fault
ECT sensor
faul
t
MAFM sensor fault IAT se
nsor fault

Thro
tt
le position sensor
fault
Mec hanica
l check
Mec
hanica
l check
Mec
hanica
l check
Mec
hanica
l check
Go t
o DTC P020
1 to 0208
Go t
o
DTC P0116 to 0118, P0125
Go t
o
DTC P0101 to 0103, P1104
Go t
o DTC P011
1 to 0113
Go t
o
DTC P0121 to 0123, P0222,
P0223
D T
C P0172 System too rich bank
1 (A)
D T
C P0175 System too rich bank
2 (B)
F u
el delivery pressure
(high)
F a
ulty injector (leaking)
F
u
el injector continuously
open
Ai r i
ntake system restricted

Fu
el injector electrical fault
ECT sensor
faul
t
MAFM sensor fault IAT sensor fault


Thrott

le position sensor
fault
Mec hanica
l check
Mec
hanica
l check
Mec
hanica
l check
Mec
hanica
l check
Go t
o DTC P020
1 to P0208
Go t
o
DTC P0116 to P0118, P0125
Go t
o
DTC P0101 to P0103, P1104
Go t
o DTC P011
1 to P0113
Go t
o
DTC P0121 to P0123, P0222,
P0223
Sy m
ptom
Possib
l
e Sources
Acti
o
n
D
T
C P0116 ECT circuit range / performance problem
Thermostat
Coo
l
ant level / contamination
Sensor out of range
Harness open circuit
Connector loose or corroded
*
*
*
*
*
GO to Pinpoint

Test A

*
D
T
C P0125 Insufficient coolant temperature for closed
loop fuel control
Thermostat
Coo l
ant level / contamination
Sensor out of range
Harness open circuit
Connector loose or corroded
*
*
*
*
*
GO to Pinpoint

Test A

*
D
T
C P0117 ECT circuit low input
Sensor o
p
en circuit
Harness open circuit
Harness short
*
*
*
GO to Pinpoint

Test B

*

Pinpoint test
A: P0116, P0125
Connector
loose or corroded
*
D
TC P0118 ECT circuit high input
Sensor short
Harness open circui

t
Harness short
Connector loose or corroded
*
*
*
*
GO to Pinpoint

Test C
*
D
TC P1474 Intercooler coolant pump relay malfunction
Intercooler pump relay
failure
Intercooler pump relay to ECM drive circuit
fault Intercooler pump relay coil ground circuit
fault Harness fault
Connector loose or corroded
Connector pins(s) bent or tracking between
connections ECM power supply fault
*
*
*
*
*
*
*
GO to Pinpoint

Test D
*
P
INPOINT TEST A : P0116, P0125
T
EST CONDITIONS
D
ETAILS/RESULTS/ACTIONS
A1

: 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 A2
A2: ENGINE
COOLANT SYSTEM CHECK
•

NOTE: Do not use the instrument display, if th
e ECT has failed this will not operate correctly.
Chec
k engine temperature rise using a thermocouple or
similar device.
1
Engine
temperature increasing?
Yes GO to A3
No Check coolant level
Check coolant for contamination
Check/test thermostat