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Home >> Toyota >> 1998 >> Avalon XLS >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Automatic Transmission Diagnosis - A-541E >> Diagnostic Tests >> DTC P1780: Park/Neutral Position (PNP) Switch >> Circuit Description

Circuit Description

PNP switch verifies shift lever position and sends signals to ECT ECU. If no signal is received from PNP switch, ECT ECU defaults to drive ("D") position. DTC is set when ECT ECU detects 2 or more circuits are on. Vehicle speed has to be above 44 MPH for more than 30 seconds with engine RPM at 1500-2500. Possible causes are:

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