Need help with TPS harness


  • Need help with TPS harness

    My TPS checks out fine.

    According to the FSM, the harness to the TPS should have continuity. It does not.

    I am wondering if continuity should be checked with the ignition switch open or closed?

    With the ignition switch off I only get continuity at the TPS at idle.

    With the ignition switch on I get continuity at the TPS all the time even at WOT.

    The FSM mentions pins 18 and 25. Do these pins correlate the pins on the ECU?

    Should I bypass the harness and run two wires from the ECU to the TPS or should I look for something else?

    Taking life one sensor at a time.

  • #2
    In general, continuity should be checked when the wire is not carrying any power/signal so that it's at 0 V and has no current. So in this case ignition off. In order to check the harness, you should be checking continuity between a pin on the ECU harness connector and the corresponding pin on the TPS connector on the other end of the harness. If the resistance is small enough, you have a connection. 18 and 25 are the ECU pins the TPS is connected to.

  • #3
    Thanks. That was my next step. After spending 3 hours on this yesterday I just needed to focus.