Sensor Information Rover 820 Models

Lucas Hotwire Multipoint EFI


values measured on 1990 Model 820SI
Throttle Position Sensor (TPS)

Information for general guidance only

Location: On the side of the throttlebody.

Description: Simple track potentiometer 5.5 K Ohm, 3 connections - earth , output and 5 Volt supply.
 

Function
Wire Colour on Sensor
5 V Supply 
Yellow
Output Signal to ECU
Red
Earth
Green
Tests
Check supply voltage. 
Check earth connection.
Check output voltage varies smoothly as throttle is operated.
Check output voltage with throttle in idle position
Disconnect plug and check resistance of sensor between supply pin (yellow wire) and earth pin (green wire) is 5.5 K Ohms.

 
 
Volts
Remarks
Supply Voltage
5.00
 
Output Voltage at Idle Position 
0.325 +/- 0.010
To set turn ignition on and with throttle closed slacken the small Torx which hold the sensor to the throttlebody, rotate sensor body until correct voltage is obtained on the output wire

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