Circuit Description
WARNING: This page is about a different car, the 2002 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
Park/Neutral Position (PNP) switch sends a signal to ECM when transaxle is in Neutral or Park. This signal is used for air/fuel correction and for idle speed control. DTC is set when 2 or more switches are on simultaneously for "P", R", "N", "2" and "L" position, or ECM is receiving an ON signal from PNP switch when vehicle has been operated for more than 30 seconds at 44 MPH or more and engine speed is 1500-2500 RPM. Possible causes are:
- Shorted PNP switch circuit.
- Defective PNP switch.
- Defective ECM.