Lotus Evora - Fuel Level Sensor

Lotus Service Notes Section EMR
Page 47
Fuel Level Sensor
P0461 Fuel Level Sensor “A” Circuit Range/Performance
P0462 Fuel Level Sensor “A” Circuit Low
P0463 Fuel Level Sensor “A” Circuit High
Description
When the engine is running the ECU continuously monitors the fuel level sensor feedback signals. The feedback
signal should be low when turned ON and high when turned OFF. The following codes will be set if the above
conditions are not meet.
Sensor connections
Sensor Connector Description ECU Pin ECU Connector
1
2 Fuel level sensor A2 48 Way (Right)
3 Fuel level sensor ground. K3 48 Way (Right)
P0462, P0463
Monitor:
• Continuous
Enable Criteria:
• EngineRunning
Disable Criteria:
• None
Malfunction Criteria:
• P0462–Voltage<0.020V,P0463–Voltage>0.684Vfor1.5secs
Potential failure modes:
• Sensoropenorshortcircuit
• Fuellevelsensor
Diagnostic Mask:
• TheMILwillbeilluminatedifthesefaultsarepresentfor2consecutivetrips.
P0461
The ECU calculates the fuel usage and determines whether the fuel level sensor has responded correctly to
this usage. The ECU also monitors the filtered and unfiltered signal at idle after a 20 second de-slosh period
and compares the differences.
Monitor:
• Continuous
Enable Criteria 1:
• VehicleIdling
• Vehiclestationaryfor20seconds
Disable Criteria 1:
• Fuellevel<3.3litres(0.9USgallons)
Malfunction Criteria 1:
• Signalfluctuation>10litres,35timesover7secondperiod
2009/02