The TPS is a variable resistor. As the accelerator pedal is depressed and released, the resistance inside the sensor changes. The computer uses this reading to determine proper air/fuel mixture and ignition timing settings.
Removal & Installation
- Disconnect the negative battery cable.
- Remove the necessary air intake components to access the TPS.
- Detach the electrical wire harness plug from the sensor.
- Paint an alignment mark on the sensor housing to the throttle body.
- Remove the sensor attaching bolts.
- Remove the sensor from the throttle body.
- Installation is the reverse of the removal procedure.
- Turn the ignition switch to ON position (Engine OFF).
Measure voltage between the PCM terminal 1J and ground
- Closed throttle-0.40-0.80 volts.
- Wide open throttle-3.815-4.095 volts.
Measure voltage between the PCM terminal 1M and ground.
- Closed throttle-1.18-1.78 volts
- Wide open throttle-4.033-4.303 volts.
- If within specifications, check wiring and/or connectors and repair/replace as necessary.
- If not within specifications, replace the throttle body.