Lotus Evora User Manual

Page 34
Lotus Service Notes Section EMR
Misfire
P0300 Random/Multiple Cylinder Misfire Detected
P0301 Cylinder 1 Misfire Detected
P0302 Cylinder 2 Misfire Detected
P0303 Cylinder 3 Misfire Detected
P0304 Cylinder 4 Misfire Detected
P0305 Cylinder 5 Misfire Detected
P0306 Cylinder 6 Misfire Detected
Description
A misfiring cylinder can be detected by analysing crank speed variation. As a result of a combustion event there
will be a net acceleration of the crankshaft. Subsequent to a misfire event the engine will decelerate over the
period following the missed cylinder event.
Speed changes can be characterised by observing changes in the time period for a fixed angle of rotation after
firing events. A significant change in this period, assessed by comparison to previous periods, may be attributed
to misfire on a known cylinder.
Component connections
Connector Description ECU Pin ECU Connector
1 Supply Voltage Coil 1 Coil 2 Coil 3 Coil 4 Coil 5 Coil 6
2 Ignition Coil Feedback D2 D2 D2 D2 D2 D2 32 Way (Left)
3 Coil Output (Logic) F4 F3 F2 F1 E4 E3 32 Way (Left)
4 Ground
Malfunction Criteria
The operation of all the misfire codes is the same, the last digit relates to the misfire involved i.e. a code P0303
indicates there is a problem with cylinder number 3.
P0300 indicates the misfire is random and not linked to one particular cylinder.
Monitor:
• Continuous
Enable Criteria:
• Batteryvoltagebetween10–16V
• Coolanttemperaturebetween-10–120°C(14–248°F)
• Enginespeedbetween480–8010rpm
• Enginespeedtransient>15rpm
• Altitude<8000ft(2438m)/Baro>756mbar
• Fuellevel>5litres(1.3USgallons)
• Engineloadgreaterthan14–25%dependingonenginespeed
Disable Criteria:
• DFCOenabled(DecelerationFuelCutOff)
• Roughroad
• MAFfaults
Malfunction Criteria:
• Individualcylindermisfireinexcessof10%oftotalenginemisfire
• P300setwhenmorethanonecylindermisfiringorwhenCAMerrorMILrequested
Limp home (depends on severity and number of cylinders affected):
• Throttlelimitedandenginecontinuestorunonallcylinders
• Fuelsystemsettoopenloopcontrol
• Affectedbankshutdownandenginespeedlimitedto4000rpm
2009/02

Lotus Evora Specifications

General

Brand	Lotus
Model	Evora
Category	Automobile
Language	English