Page 1609 of 2490
Pinpoint test G: P0157, P0158
With EM010 and EM015 disconnected, measure the
voltage between EM010/023 and EM015/002. 1
Is the voltage B+?
Yes Remove link lead and reconnect all connectors.
GO to F19
No Check integrity of EMS fuse F1 4, EMS control relay (relay
1) is energized and all connections made.
GO to F19
F19: 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 G : P0157, P0158
TEST CONDITIONSDETAILS/RESULTS/ACTIONS
G1: RETRIEVE DTCS
• NOTE: Battery and or ECM disconnection prior to scanning wi ll erase all data, ensure that the correct DTC is present.
Page 1610 of 2490
Connect the scan tool 1
Have the DTC(s) and freeze frame data been recorded?
Yes GO to G2
G2: 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 EM024/001 and EM024/002. 2
Is the voltage between 600mV and 1.0 Volt?
Yes
GO to G3
No Renew O2 sensor and reconnect plug(s)
GO to G6
G3: CHECK FOR O2 SENSOR FAILURE
Page 1611 of 2490
With the conditions held as G2, suddenly decelerate to idle. 1
Has the voltage dropped to 400mV or less ?
Yes GO to G4
No Renew O2 sensor and reconnect plug(s).
GO to G6
G4: CHECK FOR O2 SENSOR FAILURE
Page 1612 of 2490
With the conditions held as G3, suddenly accelerate to
approximately 2500 rpm. 1
Has the voltage risen to between 600mV and 1 volt?
Yes GO to G5
No Renew O2 sensor and reconnect plug(s).
GO to G6
G5: CHECK FOR O2 SENSOR FAILURE
Page 1613 of 2490
With the conditions held as in G4, 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 G7
No Renew O2 sensor and reconnect plug(s).
GO to G6
G6: 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
G7: CHECK FOR O2 SENSOR CONTINUITY
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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
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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
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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