Lotus Evora - Malfunction Criteria; Potential Failure Modes

Lotus Service Notes Section EMR
Page 27
Malfunction Criteria:
• SetwhenthesensorfailstoswitchfromaLeantoaRichconditionorswitchfromaRichtoaLeancondition
in a sufficiently timely manner. A selection of switches is used to determine the average times.
“highlighted section removed”
Potential failure modes:
• Sensorconnectorandwiringshouldbecheckedforcorrosionandlooseconnections
• Sensorcontaminated,possiblyfromfuel,improperuseofRTV,engineoilorcoolant
Diagnostic Mask:
• TheMILwillbeilluminatedifthesefaultsarepresentfor2consecutivetrips.
P0134 (Bank1) or P0154 (Bank2)
Monitor:
• Untileitherpassedorfailed.
Enable Criteria:
• Engineruntime>30seconds
• Engineisnotatidle
• Engineisinclosedloopfuelcontrol
• O2sensorready
Malfunction Criteria:
• Setwhenthesensorfailstoswitchabove673mVandbelow400mVwithina60secondperiod.
Potential failure modes:
• Sensorconnectorandwiringshouldbecheckedforcorrosionandlooseconnections.
• Gasleakinexhaustsystem
Diagnostic Mask:
• TheMILwillbeilluminatedifthesefaultsarepresentfor2consecutivetrips.
P0135, P0155
Monitor:
• Continuous
Enable Criteria:
• Engineruntime>20seconds
Malfunction Criteria:
• Setwhentheheateroutputisgreaterthan1900mAorlessthan250mAfor1.5seconds,for40consecutive
checks.
Potential failure modes:
• Sensorconnectorandwiringshouldbecheckedforcorrosionandlooseconnections.
Diagnostic Mask:
• TheMILwillbeilluminatedifthesefaultsarepresentfor2consecutivetrips.
2009/02