Lotus Evora - Page 110

Page 38
Lotus Service Notes Section EMR
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 ECU Pin ECU Connector
1 Inlet Bank 1 Signal A3 32 Way (Left)
2 Inlet Bank 1 Ground B3 32 Way (Left)
3 Supply voltage 5V D1 32 Way (Left)
1 Exhaust Bank 1 Signal D4 32 Way (Left)
2 Exhaust Bank 1 Ground C3 32 Way (Left)
3 Supply voltage 5V D1 32 Way (Left)
1 Inlet Bank 2 Signal A2 32 Way (Left)
2 Inlet Bank 2 Ground C2 32 Way (Left)
3 Supply voltage 5V D1 32 Way (Left)
1 Exhaust Bank 2 Signal D3 32 Way (Left)
2 Exhaust Bank 2 Ground C4 32 Way (Left)
3 Supply voltage 5V D1 32 Way (Left)
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.
2009/02