Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2001 Land Rover Range Rover HSEFACTORY OEM SERVICE PROCEDURE
Throttle Position (TP) Sensor
NOTE:
Because ECM is able to determine the closed throttle position, the TP sensor does not need to be adjusted when replaced.
- Check for poor connections, loose terminals, and open or shorted wires. See WIRING DIAGRAMS article. If no problems are found, go to next step. Perform repairs as necessary.
- Turn ignition on. Backprobe between ECM 52-pin connector C0636 terminals No. 24 (Yellow/Light Green wire) and No. 25 (Red/Black wire). Measure voltage while moving throttle valve between fully closed (idle) and fully open (wide open) positions. See THROTTLE POSITION SENSOR SIGNAL VOLTAGE table. If voltage is as specified and changes smoothly, test is complete. If voltage is not as specified, replace TP sensor.
THROTTLE POSITION SENSOR SIGNAL VOLTAGE
| Position | Volts |
|---|---|
| Minimum | Zero |
| Idle | 0.3-0.5 |
| Wide Open Throttle (WOT) | 4.5 |
| Maximum | 5.0 |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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