Diagnostic Test

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

CHECK IF DTC IS CURRENT
1. With the scan tool, check the Starts Since Set counter for P0934.
  NOTE: This counter only applies to the last DTC set.
  
  Is the Starts Since Set counter 2 or less?
  
  Yes
  - Go to step 2
  No
  - Go to step 6
CHECK THE PCM AND WIRING
1. Turn the ignition off to the lock position.
2. Remove the Ignition Switch Feed fuse from the TIPM.
  CAUTION: Removal of the Ignition Switch Feed fuse from the TIPM will prevent the vehicle from being started in gear.
  
  WARNING: The Ignition Switch Feed fuse must be removed from the TIPM. Failure to do so can result in possible serious or fatal injury.
3. Install the Transmission Simulator 8333A and the Electronic Transmission Adapter kit.
4. Ignition on, engine not running.
5. With the scan tool, under Transmission Sensors, monitor the Line Pressure.
6. Using the Transmission Simulator, set the rotary switch to each of the 3 line pressure positions.
  NOTE: All three scan tool Line Pressure readings should be steady and ± 14 kPa or 2.0 psi (0.2 of a volt) of the reading specified on the Transmission Simulator.
  
  Did the Line Pressure read within ± 14 kPa or 2.0 psi (0.2 of a volt) in all three positions?
  
  Yes
  - Replace the Line Pressure Sensor in accordance with the Service Information.
  - Perform the 40/41TE VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Go to step 3
CHECK THE (T38) LP VFS SIGNAL CIRCUIT FOR A SHORT TO GROUND

Fig 1: Checking Line Pressure Variable Force Solenoid Control Signal Circuit For A Short To Ground
Courtesy of CHRYSLER LLC
1. Turn the ignition off to the lock position.
2. Disconnect the Transmission Simulator 8333A and the Electronic Transmission Adapter kit.
3. Disconnect the PCM C2 harness connector.
4. Measure the resistance between ground and the (T38) LP VFS Signal circuit.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Repair the (T38) LP VFS Signal circuit for a short to ground.
  - Perform the 40/41TE VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Go to step 4
CHECK THE (T854) 5-VOLT SUPPLY CIRCUIT FOR AN OPEN

Fig 2: Checking 5-Volt Supply Circuit For An Open
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (T854) 5-volt Supply circuit between the PCM C2 harness connector and the Line Pressure Sensor/Variable Force Solenoid Assembly harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go to step 5
  No
  - Repair the (T854) 5-volt Supply circuit for an open.
  - Perform the 40/41TE VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
CHECK THE (T854) 5-VOLT SUPPLY CIRCUIT FOR A SHORT TO GROUND

Fig 3: Checking 5-Volt Supply Circuit For A Short To Ground
Courtesy of CHRYSLER LLC
1. Measure the resistance between ground and the (T854) 5-volt Supply circuit.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Repair the (T854) 5-volt Supply circuit for a short to ground.
  - Perform the 40/41TE VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Using the schematics as a guide, check the Powertrain Control Module (PCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. Check for any Service Bulletins that may apply. If no problems are found, replace and program the PCM in accordance with the Service Information. With the scan tool perform the Quick Learn procedure.
  - Perform the 40/41TE VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
CHECK THE WIRING AND CONNECTORS
1. The conditions necessary to set this DTC are not present at this time.
2. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit.
3. Wiggle the wires while checking for shorted and open circuits.
4. With the scan tool, check the Event Data to help identify the conditions in which the DTC was set.
5. Perform any service bulletins that may apply.
  Where there any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the 40/41TE VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Test Complete.