1998 JAGUAR X308 fault code

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 A12
No Inspect connector EM014 for co rrosion, damage, or pushed
back pin.
Inspect ground stud EM008L for corrosion or damage.
Inspect harness, splice EMS36, connector or ground. Repair
as required and reconnect plug(s).
Repair as required an d reconnect plug(s).
GO to A11
A11: 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
A12: CHECK FOR HEATED O2 SENSOR CONTINUITY

Pinpoint test B: P0133
Measure the voltage between EM010/023 and EM015/002 1
Is the voltage B+?
Yes Remove link lead and reconnect all connectors
GO to A18
No Check EMS fuse F14 and that EMS control relay (relay 1) is
energized and with all connections made.
GO to A18
A18: 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
PINPOINT TEST B : P0133
TEST CONDITIONSDETAILS/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.

GO to B7
No Renew O2 sensor, reconnect plug(s).
GO to B8
B7: CHECK FOR O2 SENSOR FAILURE
With the conditions held as in B6, run the engine at 1500
rpm for approximately 2 minutes. 1
Does the displayed voltage drop below 400mV and rise above 500 mV, cycling approximately every 4 seconds?
Yes GO to B9
No Renew O2 sensor, reconnect plug(s).
GO to B8
B8: 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
B9: HEATED O2 SENSOR SHORT CIRCUIT TO GROUND

With EM021 disconnected measure the insulation resistance
between sensor pin 001 and sensor body. 1
Repeat for pin 003 and sensor body. 2
Is the resistance > 10 MOHM?
Yes GO to B11
No Renew the O2 sensor and reconnect plug(s).
GO to B10
B10: 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
B11: SIGNAL GROUND 1 CONTINUITY

Pinpoint test C: P0137, P0138
Measure the voltage between EM010/023 and EM015/002. 1
Is the voltage B+?
Yes Remove link lead and reconnect all connectors.
GO to B19
No Check EMS fuse F14 and that EMS control relay (relay 1) is
energized and with all connections made.
GO to B19
B19: 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
PINPOINT TEST C : P0137, P0138
TEST CONDITIONSDETAILS/RESULTS/ACTIONS
C1: RETRIEVE DTCS
• NOTE: Battery and or ECM disconnection prior to scanning wi ll erase all data, ensure that the correct DTC is present.

With the conditions held as in C4, run the engine at 1500
rpm for approximately 3 minutes. 1
Does the displayed voltage drop below 400mV and rise above 500
mV, cycling approximately every 180 seconds?
Yes GO to C7
No Renew O2 sensor and reconnect plug(s).
GO to C6
C6: 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
C7: CHECK FOR O2 SENSOR CONTINUITY

With EM022 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 C11
No Renew the O2 sensor and reconnect all plugs.
GO to C10
C10: 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
C11: SIGNAL GROUND 1 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 C14
No Inspect harness / connector EM014 for corrosion, damage, or
pushed back pin.
Inspect ground stud EM008L for corrosion or damage.
Inspect splice EMS36 for or damage.
Repair as required an d reconnect plug(s).
GO to C13
C13: 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
C14: CHECK FOR SHORT TO B+