Engine Speed / Position Sensors - Lotus Evora Service Notes

Lotus Service Notes

Engine Speed / Position Sensors

P0335 Crankshaft Position Sensor "A" Circuit Range/Performance
Description
Engine speed is calculated by measuring the time between the 'teeth' of the crankshaft sensor trigger disc. The
disc has 34 'teeth' and 2 missing 'teeth', spaced at 10 degree intervals around the disc. The 2 missing 'teeth'
are positioned at 225 degrees before cylinder No.1 and 4 TDC. The crankshaft sensor signal is also used to
determine misfires events.
Sensor connections
Sensor Connector Description
1 Sensor input
2 Ground
Monitor:
• Continuous
Enable Criteria:
• Engine running
Disable Criteria:
• None
Malfunction Criteria:
• 15 crank errors in succession. This can occur due to no crank signal occurring whilst the cams continue to
count or if there is a measured consecutive crank error.
Potential failure modes:
• Sensor signal open circuit or short to ground
• Sensor ground open circuit
• Sensor failure
• Crankshaft sensor plate
• ECU
Diagnostic Mask:
• The MIL will be illuminated if this fault is present for two consecutive trips.
Notes:
If a sensor or sensor circuit failure occurs, the engine will not fire or start.
ECU Pin ECU Connector
A4 32 Way (Left)
B2 32 Way (Left)
2009/02
Section EMR
Page 37