Diagnostic Test

CHECK THE PRIMARY PRESSURE SENSOR VOLTAGE
1. Using the scan tool, read the Primary Pulley Pressure Sensor voltage.
  Is the voltage below 0.09 of a Volt?
  
  Yes
  - Go to step 2
  No
  - Go to step 7
CHECK THE (T72) 5 VOLT SUPPLY CIRCUIT

Fig 1: Measuring Voltage Of 5 Volt Supply Circuit In Transmission Solenoid/Pressure Switch Assembly Harness Connector
Courtesy of CHRYSLER LLC
1. Turn the ignition off to the lock position.
2. Disconnect the Transmission Solenoid/Pressure Switch Assembly harness connector.
3. Ignition on, engine not running.
4. Measure the voltage of the (T72) 5 Volt Supply circuit in the Transmission Solenoid/Pressure Switch Assembly harness connector.
  Is the voltage 5.0 Volts (± 0.2 of a Volt)?
  
  Yes
  - Go to step 3
  No
  - Go to step 6
CHECK THE (T21) PRIMARY PRESSURE SENSOR SIGNAL CIRCUIT

Fig 2: Checking Primary Pressure Sensor Signal Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off to the lock position.
2. Disconnect the Transmission Solenoid/Pressure Switch Assembly harness connector.
3. Ignition on, engine not running.
4. Connect a jumper wire between the (T21) Primary Pressure Sensor Signal circuit and the (T72) 5 Volt Supply circuit in the Transmission Solenoid/Pressure Switch Assembly harness connector.
5. Using the scan tool, read the Primary Pulley Pressure Sensor voltage.
  Is the voltage 5.0 Volts (± 0.2 of a Volt)?
  
  Yes
  - Replace the Primary Pressure Sensor (Valve Body) in accordance with the Service Information.
  - Perform the CVT VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure .
  No
  - Go to step 4
CHECK THE (T21) PRIMARY PRESSURE SENSOR SIGNAL CIRCUIT FOR AN OPEN

Fig 3: Measuring Resistance Of Primary Pressure Sensor Signal Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off to the lock position.
2. Disconnect the TCM C2 harness connector.
3. Measure the resistance of the (T21) Primary Pressure Sensor Signal circuit between the TCM C2 harness connector and the Transmission Solenoid/Pressure Switch Assembly harness connector.
  Is the resistance above 5.0 Ohms?
  
  Yes
  - Repair the (T21) Primary Pressure Sensor Signal circuit for an open or high resistance.
  - Perform the CVT VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure .
  No
  - Go to step 5
CHECK THE (T21) PRIMARY PRESSURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND

Fig 4: Measuring Resistance Between Ground & Primary Pressure Sensor Signal Circuit
Courtesy of CHRYSLER LLC
1. Measure the resistance between ground and the (T21) Primary Pressure Sensor Signal circuit.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Repair the (T21) Primary Pressure Sensor Signal circuit for a short to ground.
  - Perform the CVT VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure .
  No
  - Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. Check for any Service Bulletins for possible causes that may apply. If no problems are found, replace the TCM in accordance with the appropriate Service Information.
  - Perform the CVT VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure .
CHECK THE (T72) 5 VOLT SUPPLY CIRCUIT FOR AN OPEN

Fig 5: Measuring Voltage Of 5 Volt Supply Circuit In Transmission Solenoid/Pressure Switch Assembly Harness Connector
Courtesy of CHRYSLER LLC
1. While back probing, measure the voltage of the (T72) 5 Volt Supply circuit in Transmission Solenoid/Pressure Switch Assembly harness connector.
  Is the voltage 5.0 Volts (± 0.2 of a Volt)?
  
  Yes
  - Repair the (T72) 5 Volt Supply circuit for an open or high resistance.
  - Perform the CVT VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure .
  No
  - Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. Check for any Service Bulletins for possible causes that may apply. If no problems are found, replace the TCM in accordance with the appropriate Service Information.
  - Perform the CVT VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - 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.
  Were there any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the CVT VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure .
  No
  - Test Complete.