1998 JAGUAR X308 Workshop Manual

Page 1585 of 2490

JAGUAR X308 1998 2.G Workshop Manual  Connect the scan tool 1 
Have the DTC(s) and freeze frame data been recorded? 
Yes  GO to E2  
E2: CHECK O2 SENSOR HEATER CONTINUITY
 Ignition switch to position 0 1 
Disconnect EM023 
Bracket on

Page 1586 of 2490

JAGUAR X308 1998 2.G Workshop Manual  Run the engine for a period to warm the sensor and then 
maintain a steady speed of  approximately 2500 rpm. 1 
With EM023 disconnected, measure the voltage between 
EM023/003 and EM023/004. 2 
Is th

Page 1587 of 2490

JAGUAR X308 1998 2.G Workshop Manual  With the conditions held as E3, suddenly decelerate to 
idle. 1 
Has the voltage dropped to 400mV or less ? 
Yes GO to E5  
No  Renew O2 sensor. Reconnect plug(s) 
GO to E7  
E5: CHECK FOR O2 SENSOR

Page 1588 of 2490

JAGUAR X308 1998 2.G Workshop Manual  With the conditions held as E4, suddenly accelerate to 
approximately 2500 rpm. 1 
Has the voltage risen to between 600mV and 1 volt? 
Yes GO to E7  
No  Renew O2 sensor; reconnect plug(s) 
GO to E6

Page 1589 of 2490

JAGUAR X308 1998 2.G Workshop Manual  With EM023 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 E9  
No  Renew th

Page 1590 of 2490

JAGUAR X308 1998 2.G Workshop Manual  With EM010 and EM014 disconnected, measure the 
resistance between EM010/023 and chassis ground 
EM008L 1 
Is the resistance < 0.5 OHM? 
Yes  GO to E10  
No  Inspect harness / connector EM010 for cor

Page 1591 of 2490

JAGUAR X308 1998 2.G Workshop Manual  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 E12  
No  Inspect harness / connector EM014 for co

Page 1592 of 2490

JAGUAR X308 1998 2.G Workshop Manual With EM012 and EM023 disconnected, measure the 
resistance between EM012/014 and EM023/003. 1 
Is the resistance < 0.5 OHM? 
Yes GO to E13  
No  Inspect harness / connecto rs EM012, and EM023 for 
cor