1999-2002 Land Rover Defender Workshop Manual

ENGINE MANAGEMENT SYSTEM
SENSOR - THROTTLE POSITION (TP)
FROM VIN 607225
Defender vehicles from VIN 607225 use three track thick film potentiometers. No idle speed sender switch is used
on this type of sensor because the ECM can compare the two or three sets of signals to implement idle speed
control and over-run fuel shut-off. The two potentiometers are known as track 1 and 2 potentiometers. The track 3
potentiometer on later models is used to improve the resolution of the pedal. The ECM provides a 5V supply and
receives a signal from each of the potentiometer tracks.
Td5 TP Sensor Signal Output
A = Track 1
B = Track 2
C = Track 3
D = Voltage
E = Pedal Angle (Degrees)
F = Not applicable for Defender
G = Wide open throttle stop tolerance band
With reference to the above graph, at idle (throttle released), track 2 returns a signal of 4.2V to the ECM and track
1 returns a signal of 0.8V. The ECM calculates the sum of these two figures which totals 5.0V.
DESCRIPTION AND OPERATION
15
Product Specification
CategoriesLand Rover, Land Rover Defender
Tags
Model Year1999, 2000, 2001, 2002
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- 627 pages
Document TypeWorkshop Manual
LanguageEnglish
Product NameDefender
Product BrandLand Rover
Document File TypePDF
Publisherlandrover.com
Wikipedia's Pagehttp://en.wikipedia.org/wiki/Land_Rover
CopyrightAttribution Non-commercial
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