Diagnostic Test

1) CHECK TO SEE IF THE DTC IS ACTIVE
With the scan tool, read Transmission DTCs.

Is the status Active for this DTC or is the STARTS SINCE SET counter 2 or less?

Yes
1. Go To 2).
No
1. Go To 6).
2) CHECK THE (T20) LINE PRESSURE SOLENOID CONTROL CIRCUIT

Fig 1: Checking (T20) Line Pressure Solenoid Control Circuit In Transmission Solenoid/Pressure Switch Assembly Harness Connector
Courtesy of CHRYSLER LLC

Turn the ignition off to the lock position.

Disconnect the Transmission Solenoid/Pressure Switch Assembly harness connector.

Ignition on, engine not running.

With the scan tool, actuate the Line Pressure Solenoid.

Using a test light connected to ground, check the (T20) Line Pressure Solenoid Control circuit in the Transmission Solenoid/Pressure Switch Assembly harness connector.

NOTE: The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.

Does the test light illuminate brightly?

Yes
1. Go To 3).
No
1. Go To 5).
3) CHECK THE (T20) LINE PRESSURE SOLENOID CONTROL CIRCUIT FOR A SHORT TO VOLTAGE

Fig 2: Measuring Voltage Of (T20) Line Pressure Solenoid Control Circuit
Courtesy of CHRYSLER LLC

With the scan tool, stop the actuation of the Line Pressure Solenoid.

Turn the ignition off to the lock position.

Disconnect the TCM C1 harness connector.

Ignition on, engine not running.

Measure the voltage of the (T20) Line Pressure Solenoid Control circuit.

Is the voltage above .05 volts?

Yes
1. Repair the (T20) Line Pressure Solenoid Control circuit for a short to voltage.
2. Perform CVT VERIFICATION TEST .
No
1. Go To 4).
4) CHECK THE LINE PRESSURE SOLENOID

Fig 3: Measuring Resistance Between Ground And (T20) Line Pressure Solenoid Control Circuit In TCM C1 Harness Connector
Courtesy of CHRYSLER LLC

Turn the ignition off to the lock position.

Reconnect the Transmission Solenoid/Pressure Switch Assembly harness connector.

Measure the resistance between ground and the (T20) Line Pressure Solenoid Control circuit in the TCM C1 harness connector.

Is the resistance between 3.0 and 9.0 ohms?

Yes
1. 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 per the Service Information.
2. Perform CVT VERIFICATION TEST .
No
1. Replace the CV Transmission or replace the Line Pressure Solenoid (Valve Body) per the Service Information.
2. Perform CVT VERIFICATION TEST .
5) CHECK THE (T20) LINE PRESSURE SOLENOID CONTROL CIRCUIT FOR AN OPEN

Fig 4: Checking Line Pressure Solenoid Control Circuit For Open
Courtesy of CHRYSLER LLC

Turn the ignition off to the lock position.

Measure the resistance of the (T20) Line Pressure Solenoid Control circuit between the TCM C1 harness connector and the Transmission Solenoid/Pressure Switch Assembly harness connector.

Is the resistance above 5.0 ohms?

Yes
1. Repair the (T20) Line Pressure Solenoid Control circuit for an open.
2. Perform CVT VERIFICATION TEST .
No
1. 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 per the Service Information.
2. Perform CVT VERIFICATION TEST .
6) INTERMITTENT WIRING AND CONNECTORS
The conditions necessary to set this DTC are not present at this time.

Using the schematics as a guide, inspect the wiring and connectors specific to this circuit.

Wiggle the wires while checking for shorted and open circuits.

Were there any problems found?

Yes
1. Repair as necessary.
2. Perform CVT VERIFICATION TEST .
No
1. Test Complete.