Lotus 2004 ELISE Service Notes page 135

Lotus Service Notes
Throttle Position
P0121 Throttle Position Sensor 'A' Circuit Range/Performance
P0122 Throttle Position Sensor 'A' Circuit Low
P0123 Throttle Position Sensor 'A' Circuit High
Description
The Throttle Position Sensor (TPS) is a potentiometer device, which is connected to a 5V reference source, a
ground and an input signal to the ECU.
Sensor connections
Sensor Connector
1
2
3
4
Sensor characteristics
0% = 0.595 V ± 5%
100% = 4.148 V ± 5%
Monitor: Continuous.
P0121
Enable Criteria:
Rationality check – throttle not too high at low engine load:
• Engine running
• TPS > 80%
• Engine speed >1500rpm
• MAPS* < 40%
• Vehicle Speed > 30 km/h (18.6mph)
OR
Rationality check – throttle not too low at high engine load:
• Engine running
• TPS < 10%
• Engine speed 1500 – 2010rpm
• MAPS* > 65%
*(MAPS – Mass Air Per Stroke)
Disable Criteria:
P0101, P0102, P0103
P0500
P0016
Potential failure modes:
• Sensor short or open circuit
• Sensor failure
Page 12
sn_emp_cyclone.indd 12
P0121
P0122
P0123
Description ECU Pin
Ground 34 (D1)
5V Ref. 8 (M4)
TPS1 Signal 20 (D3)
TPS2 Signal (E3)
– MAF Sensor fault codes
– Vehicle Speed sensor
– Crankshaft/Camshaft position correlation error
ECU Connector
52 Way (Right)
52 Way (Right) '06 M.Y. in brackets
52 Way (Right)
(Right)
Section EMP
03/03/2006 11:03:35