Lotus Evora - Pedal Position Sensor;Switch D;E Voltage Correlation; Throttle Actuator Control System - High Airflow Detected

Lotus Service Notes Section EMR
Page 75
Pedal Position Sensor/Switch 'D'/'E' Voltage Correlation
P2138 Pedal position sensor/switch ‘D/E’ voltage correlation
Description
Two potentiometers are built into the throttle pedal unit in order to provide a throttle demand signal to the ECU.
Two processors within the ECU compare the two output signals, which should match within a defined tolerance.
Note that the potentiometers operate on 5 volts.
Enable Criteria:
• None
Disable Criteria:
• None
Potential failure modes:
• PPS1readingincorrectly
• PPS2readingincorrectly
Notes: A maximum throttle opening of 15% may be imposed.
Throttle Actuator Control System – High Airflow Detected
P2173 Throttle actuator control system – high airflow detected
Description
The mass air flow is compared with the throttle position to determine whether an incorrect correlation exists.
Enable Criteria:
• None
Disable Criteria:
• MAFfault(s)present
Potential failure modes:
• Throttleplatedamage
• Airleakinintakesystem
Notes: A mechanically sprung 7% throttle opening may be imposed, or the injectors may be shut off to stop
the engine.
2009/02