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Lotus Service Notes
Section EMP Page 51 Crankshaft Position–Camshaft Position Correlation Error P0016 Description The crankshaft position sensor is used to identify engine position and speed via a pole wheel mounted on the front end of the crankshaft. The camshaft position sensor is used to determine camshaft position from a three vane reluctor on the rear end of the inlet camshaft. The Variable Valve Timing system (VVT) on the inlet cam- shaft can vary the timing by up to 25°, with fault codes P0011 and P0012 allocated to errors with the variable timing. Fault code P0016 indicates a mechanical timing error such as incorrectly set, or 'jumped' cam timing. Enable Criteria: # Engine running (for up to 4 seconds) Disable Criteria: None Potential failure modes: # Crankshaft/Camshaft alignment Throttle Position Sensor 'B' Circuit Low P0222 Description Two potentiometers are built into the throttle valve actuator unit in order to provide a throttle position signal to the ECU. Note that the sensors operate on 5 volts. Enable Criteria: None Disable Criteria: None Potential failure modes: # Signal short circuit (< 0.283 V) # Reference voltage open circuit # Reference voltage short to ground # Sensor failure Notes: A maximum throttle opening of 15% may be imposed due to this single code. In the case of multiple codes, a mechanically sprung 7% opening may be applied. Throttle Position Sensor 'B' Circuit High P0223 Enable Criteria: None Disable Criteria: None Potential failure modes: # Signal open circuit (> 4.487 V) # Reference voltage open circuit # Reference voltage short to ground # Sensor failure Notes: A maximum throttle opening of 15% may be imposed due to this single code. In the case of multiple codes, a mechanically sprung 7% opening may be applied. |