LEMON Manuals: Even more car manuals for everyone
Home >> Chrysler >> 2011 >> 300 C, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 331 (4.7L - DTCS P05A4 To P2101 - 1500) >> Diagnosis And Testing >> P0850-Park/Neutral Switch Performance >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2013 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.
  1. P/N AND D/R NOT IN CORRECT POSITION 
    NOTE:

    Check the TCM for DTCs, if P0706 is set in the TCM diagnose the TCM code before continuing.

    1. Ignition on, engine not running.
    2. With the scan tool, read the Park/Neutral Position Switch input state.
    3. While moving the gear selector through all gear positions (Park to 1 and back to Park), monitor the scan tool display.

      Did the scan tool display show P/N and D/R in the correct gear positions?

      Yes 

      No 

      • Go To  2
  2. TRS (T41) SENSE (P/N SENSE) CIRCUIT OPEN 
    1. Turn the ignition off.
    2. Disconnect the PCM C1 harness connector.
    3. Disconnect the Transmission Range Sensor harness connector.
    4. Measure the resistance of the TRS (T41) Sense (P/N Sense) circuit from the TRS harness connector to the PCM C1 harness connector.

      Is the resistance below 5.0 ohms?

      Yes 

      • Go To  3

      No 

      • Repair the open in the TRS (T41) Sense (P/N Sense) circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  3. TRS (T41) SIGNAL CIRCUIT SHORTED TO GROUND 
    1. Measure the resistance between ground and the TRS (T41) Sense (P/N Sense) circuit at the TRS harness connector.

      Is the resistance above 100k ohms?

      Yes 

      • Go To  4

      No 

      • Repair the short to ground in the TRS (T41) Sense (P/N Sense) circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  4. TRANSMISSION RANGE SENSOR 
    1. Measure the resistance between ground and the (T41) TRS Sense (P/N Sense) circuit while moving the gear selector through each gear in the TRS connector.
      NOTE:

      The circuit is grounded in Park and Neutral and open in the other positions.

      Did the resistance change from above 100 kohms (open) to below 10.0 ohms (grounded)?

      Yes 

      • Go To  5

      No 

  5. POWERTRAIN CONTROL MODULE (PCM) 
    1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Transmission Solenoid and the Powertrain Control Module (PCM).
    2. Look for any chafed, pierced, pinched, or partially broken wires.
    3. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the Solenoid and Powertrain Control Module connectors.
    4. Refer to any Technical Service Bulletins that may apply.

      Were there any problems found?

      Yes 

      • Repair as necessary.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Replace and program the Powertrain Control Module per Service Information.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .
scientia non olet · About LEMON Manuals