LEMON Manuals: Even more car manuals for everyone
Home >> Jeep >> 2018 >> Grand Cherokee Laredo, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 29 (8HP70 Automatic Transmission - DTCS P0219-00 To P1D92-00) >> DTC Troubleshooting >> P0850-00-Park-Neutral Switch Performance >> Theory Of Operation

Theory Of Operation

WARNING: This page is about a different variant/trim than selected.

The purpose of the diagnostic is to monitor the rationality of the park pawl sensor signal. The sensor has two pins to determine the position of the park pawl:

PIN 1 = 0 PIN 2 = 0 Undefined Output
PIN 1 = 1 PIN 2 = 0 Park Pawl Engaged
PIN 1 = 0 PIN 2 = 1 Park Pawl Disengaged
PIN 1 = 1 PIN 2 = 1 Intermediate Position

and two types of faults are monitored:

If the output of the sensor is undefined or the sensor is in the intermediate position too long, this Diagnostic Trouble Code (DTC) will set.

A binding or obstructed Manual Park Release (MPR) can cause this DTC to set.