ENGINE MANAGEMENT SYSTEM - V8
In the event of a TP sensor signal failure any of the following symptoms may be observed:
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Engine performance concern.
Delayed throttle response.
Failure of emission control.
Closed loop idle speed control inoperative.
Automatic gearbox kickdown inoperative.
Incorrect altitude adaptation.
MIL illuminated (NAS only).
There are three throttle position sensor diagnostic checks:
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TP sensor signal is greater than the maximum threshold value – the engine speed must be greater than 400 rev/
min for longer than 2 seconds and the signal must be greater than 96% for longer than 50 ms.
TP sensor signal is less than the minimum threshold – the engine speed must be greater than 400 rev/min for
longer than 2 seconds and the signal must be less than 4% for longer than 50 ms.
Ratio of throttle position to mass of air flow – the calculated throttle angle must be outside limits when the engine
speed is between 800 rev/min and 4000 rev/min, the engine load is between 2 and 6.5 and the coolant
temperature is above -10°C (14°F).
Should a malfunction of the TP sensor occur the following fault codes may be evident and can be retrieved by
TestBook.
P code
J2012 description
Land Rover description
P0101
Mass or volume air flow circuit range/
performance problem
Load monitoring, the ratio of throttle position to air flow
P0122
P0123
TPS a circuit low input
TPS a circuit high input
Signal < minimum threshold
Signal > maximum threshold
DESCRIPTION AND OPERATION 18-2-29
| Categories | Land Rover Defender, Land Rover Discovery II, Range Rover |
|---|---|
| Tags | Land Rover |
| Model Year | 1999 |
| Download File |
|
| Document Type | Workshop Manual |
| Language | English |
| Product Name | Discovery Series II |
| Product Brand | Land Rover |
| Document File Type | |
| Publisher | landrover.com |
| Wikipedia's Page | http://en.wikipedia.org/wiki/Land_Rover |
| Copyright | Attribution Non-commercial |
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