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Home >> Jeep >> 2014 >> Wrangler Sahara, Standard Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 151 (2.4L - DTCS P0443 To P1618) >> DTC Troubleshooting >> P0850-Park/Neutral Switch Performance >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2016 Dodge Journey and 2015 Dodge Journey. However, it is still accessible from the selected car via links, so may be relevant.
  1. DTC IS ACTIVE 
    1. Start the engine and allow it to reach normal operating temperature.
      WARNING:

      When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing. Failure to follow these instructions may result in possible serious or fatal injury.

      NOTE:

      It may be necessary to test drive the vehicle in order to get this DTC to reset.

    2. With the scan tool, select View DTCs.

      Is the status Active for this DTC?

      Yes 

      • Go To  2

      No 

  2. DTCS PRESENT IN THE TRANSMISSION CONTROL MODULE (TCM) 
    NOTE:

    If the scan tool is unable to communicate with the TCM, or if there are related communication DTCs present, refer to the Communication Service Information and perform the appropriate diagnostic procedure.

    1. Turn the ignition on.
    2. With the scan tool, select View DTCs in the TCM.

      Are there any DTCs present in the TCM?

      Yes 

      • Perform the appropriate diagnostic procedure.

      No 

      • Go To  3
  3. POWERTRAIN CONTROL MODULE (PCM) 
    1. Inspect the P/N signal circuit for a short to ground, or a short to voltage with the shifter in Drive or Reverse. Perform the appropriate diagnostic procedures in the Transmission Service Information.
    2. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Transmission Range Sensor, the TCM, and the PCM.
    3. Look for any chafed, pierced, pinched, or partially broken wires.
    4. Look for broken, bent, pushed out or corroded terminals.
    5. Perform any Technical Service Bulletins that may apply.

      Were any problems found?

      Yes 

      No