Lotus 2004 ELISE Service Notes page 177

Lotus Service Notes
Pedal Position Sensor 'E' Circuit Low
Description
Two potentiometers are built into the throttle pedal unit in order to provide a throttle demand signal to the ECU.
Note that the potentiometers 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.
Pedal Position Sensor 'E' Circuit High
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.
Throttle Position Sensor 'A'/'B' Voltage Correlation
Description
Two potentiometers are built into the throttle actuator unit in order to provide a throttle position 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: Throttle position greater than 60%
Potential failure modes:
# TPS1 reading incorrectly
# TPS2 reading incorrectly
Notes: A maximum throttle opening of 15% may be imposed.
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Section EMP
P2127
P2128
P2135
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