Monitor Description
The park/neutral position switch detects the gearshift position and sends a signal to the ECM.
For security, the park/neutral position switch detects the gearshift position so that engine can be started only when the vehicle is in P or N shift position.
When the park/neutral position switch sends more than one signal at a time from switch positions P, R, N, D, 3*1 or 2*1 , the ECM interprets this as a fault in the switch. The ECM will turn on the MIL.
HINT:
*1 : Gate shift lever type
*2 : Shift lever with Multi-mode automatic transmission type