Ground at TPS sensor

3 Located the ground or earth wire at TPS sensor.

3.1 Back probe the sensor ground or earth wire by inserting a pin down the rubber insulation far enough to connect with the metal wire terminal on the inside.
3.3 Record the voltage on the meter: 0.91 mV ( A good ground will usually read less than 0.05v. Some manufacturers say 0.10v.)

3.3 What does this voltage tell you about the ECU earth or ground? Why is it important to measure it?

It tells us that circuit is completed and all the supply voltage is used up, if its reads the the high voltage than manufacturer specification there is should be problem or open circuit.

3.4 Discuss what could go wrong so that the ECU earth or ground is not good:


It will be not gives any signal computer as there could be bad connection to the earth which does not compete the circuit ( poor connection)