The tester tells you there is a problem in the TPS circuit, it does not mean that the sensor is bad, it means the entire circuit has a problem, what does this mean? well the TPS can be the problem, the connector may have a bad pin, the wiring harness may have a problem due to a broken wire from engine flex on the harness (fiarly common), the Powertrain Control Module (PCM) may also have a connection problem at the PCM main connector, or the PCM may be the problem, in real life the sensor is most the common problem, the wiring to it the 2nd, and last is the PCM. This is why dealers have 10's of thousands of $'S in test equipment, to find issues like you have, the next thing to do is pin out the entire harness from the TPS back to the PCM, twist and bend every inch of the harness while you have a ohm meter on it, anymore than 5 ohms is a problem in any of the wires, make sure you go from the PCM out to the the TPS, the PCM and TPS must be disconnecteed during this pin point testing.
Nov 16, 2008 |
1998 Mitsubishi Montero Sport