Transmission Control System

DTC P1780 Park(Neutral Position Switch Malfunction

DTC Detection Condition:

CIRCUIT DESCRIPTION
The park/neutral position switch detects the shift lever position and sends signals to the ECM.

The ECM receives signals (PNP, REVERSE, 2ND and LOW) from the park/neutral position switch. When the signal is not sent to the ECM from the park/neutral position switch, the ECM judges that the shift lever is in the D position.

Wiring Diagram:

Step 1:

Step 2 - 3:

INSPECTION PROCEDURE