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Pinpoint test D: P0140
Measure the insulation resistance between EM012/017 and
EM012/022. 1
Is the resistance > 10 MOHM?
Yes Reconnect all plugs
GO to C18
No Inspect harness / connector EM012 for corrosion, bent /
pushed back pins. Repair as re quired and reconnect plug(s).
GO to C18
C18: 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 D : P0140
TEST CONDITIONSDETAILS/RESULTS/ACTIONS
D1: RETRIEVE DTCS
• NOTE: Battery and or ECM disconnection prior to scanning wi ll erase all data, ensure that the correct DTC is present.
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Connect the scan tool 1
Have the DTC(s) and freeze frame data been recorded?
Yes GO to D2
D2: CHECK FOR LOW EXHAUST TEMPERATURE
Check the engine and exhaust system for correct operation
and normal running temperature 1
Is the engine and exhaust system operating correctly and up to
normal running temperature?
Yes GO to D3
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 D7
D3: CHECK FOR O2 SENSOR FAILURE
Run the engine for a period to warm the sensor and then
maintain a steady speed of approximately 2500 rpm. 1
Measure the voltage between EM022/001 and EM022/002. 2
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Is the voltage between 600mV and 1.0 Volt?
Yes GO to D4
No Renew O2 sensor; reconnect plug(s).
GO to D7
D4: CHECK FOR O2 SENSOR FAILURE
With the conditions held as D3, suddenly decelerate to idle. 1
Has the voltage dropped to 400mV or less ?
Yes Stop the engine
GO to D5
No Renew O2 sensor. Reconnect plug(s)
GO to D7
D5: CHECK FOR O2 SENSOR FAILURE
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With the conditions held as D4, suddenly accelerate to
approximately 2500 rpm. 1
Has the voltage risen to between 600mV and 1 volt?
Yes GO to D6
No Renew O2 sensor. Reconnect plug(s).
GO to D7
D6: CHECK FOR O2 SENSOR FAILURE
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With the conditions held as in D5, 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 D8
No Renew O2 sensor. Reconnect plug(s).
GO to D7
D7: 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
D8: CHECK FOR O2 SENSOR CONTINUITY
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With EM012 and EM022 disconnected, measure the
resistance between EM012/017 and EM022/002. 1
Is the resistance < 0.5 OHM
Yes GO to D9
No Inspect harness / connectors EM012 and EM022 for
corrosion, damaged / pushed back pins. Repair as required
and reconnect plug(s).
GO to D11
D9: O2 SENSOR SCREEN GROUND CONTINUITY
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With EM012 and EM022 disconnected, measure the
resistance between EM012/022 and EM022/001. 1
Is the resistance < 0.5 OHM?
Yes GO to D10
No Inspect harness / connectors EM012 and EM022 for
corrosion, damaged / pushed back pins.
Inspect harness / splice EMS008 for damage.
Repair as required an d reconnect plug(s).
GO to D11
D10: O2 SENSOR SHORT CIRCUIT TO GROUND
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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 D12
No Renew the O2 sensor and reconnect all plugs.
GO to D11
D11: 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
D12: SIGNAL GROUND 1 CONTINUITY