Lotus Evora Service Notes page 110

Lotus Service Notes
Engine Speed / Position Sensors
P0341 Camshaft Position Sensor "A" Circuit (Bank 1)
P0346 Camshaft Position Sensor "A" Circuit (Bank 2)
P0366 Camshaft Position Sensor "B" Circuit (Bank 2)
P0391 Camshaft Position Sensor "B" Circuit (Bank 2)
Description
The camshaft position input to the ECU is used to determine engine phase, enable sequential fuel injection
control and to determine camshaft position for VVT control. The inlet camshaft has three 'teeth' spaced 90°
apart, which are detected by the electromagnetic sensor. The valve timing setting is measured in the ECU by
measuring time from a (fixed position) crankshaft tooth to a (variable position) camshaft tooth. As the engine
speed and the position is known from the crankshaft sensor signal, the camshaft position can be calculated.
Sensor connections
Sensor Connector Description
1 Inlet Bank 1 Signal
2 Inlet Bank 1 Ground
3 Supply voltage 5V
1 Exhaust Bank 1 Signal
2 Exhaust Bank 1 Ground
3 Supply voltage 5V
1 Inlet Bank 2 Signal
2 Inlet Bank 2 Ground
3 Supply voltage 5V
1 Exhaust Bank 2 Signal
2 Exhaust Bank 2 Ground
3 Supply voltage 5V
Monitor:
• Continuous
Enable Criteria:
• Engine running
• Engine speed > 600rpm
• Engine runtime > 4 secs
Disable Criteria:
• None
Malfunction Criteria:
• 15 revolutions of crankshaft without receiving camshaft signal
Potential failure modes:
• Sensor signal open circuit or short to ground
• Sensor ground open circuit
• Sensor failure
• Cam failure
• Camshaft position plate
• ECU
Diagnostic Mask:
• The MIL will be illuminated if a fault is present for two consecutive trips.
Notes:
Fault code P0341 will also be generated if the vehicle fails security checks on start up.
Page 38
ECU Pin ECU Connector
A3 32 Way (Left)
B3 32 Way (Left)
D1 32 Way (Left)
D4 32 Way (Left)
C3 32 Way (Left)
D1 32 Way (Left)
A2 32 Way (Left)
C2 32 Way (Left)
D1 32 Way (Left)
D3 32 Way (Left)
C4 32 Way (Left)
D1 32 Way (Left)
2009/02
Section EMR