Lotus Evora - Throttle Position

Lotus Service Notes Section EMR
Page 21
Throttle Position
P0122 Throttle Position Sensor 'A' Circuit Low
P0123 Throttle Position Sensor 'A' Circuit High
P0222 Throttle Position Sensor ‘B’ Circuit Low
P0223 Throttle Position Sensor ‘B’ Circuit High
Description
The throttle position sensor (TPS) is mounted on the throttle body, and detects the opening angle of the throt-
tle valve. The TPS has 2 sensor circuits, each of which transmits a signal, VTA1 and VTA2. VTA1 is used to
detect the throttle valve angle and VTA2 is used to detect malfunctions in VTA1. The sensor signal voltages
vary between 0 V and 5 V in proportion to the throttle valve opening angle, and are transmitted to the VTA
terminals of the ECU.
Sensor connections
Sensor Connector Description ECU Pin ECU Connector
1 ETB -ve M1 48 Way (Centre)
2 ETB +ve L2 48 Way (Centre)
3 Ground C4 48 Way (Centre)
4 TPS 1B Signal F3 48 Way (Centre)
5 TPS 1A/B V Ref E4 48 Way (Centre)
6 TPS 1A Signal F2 48 Way (Centre)
Sensor characteristics
0% = 0.595 V ± 5%
100% = 4.148 V ± 5%
P0122
Monitor:
• Continuous.
Enable Criteria:
• None
Disable Criteria:
• None
Malfunction Criteria:
• Signalvoltage<0.635V
Potential failure modes:
• Signalshortcircuit
• Referencevoltageopencircuit
• Referencevoltageshorttoground
• Sensorfailure
Diagnostic Mask:
• TheMILwillbeilluminatediffaultispresent.
P0123
Monitor:
• Continuous.
Enable Criteria:
• None
2009/02