Diagnostic Test

CHECK IF THE DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE
1. Using the scan tool, read Transmission DTCs.
  Is the status Active for this DTC or is the Starts Since Set counter 2 or less?
  
  Yes
  - Go To 2
  No
  - Go To 7

CHECK LINE PRESSURE

APPROXIMATE ENGINE RPM TO LINE PRESSURE READINGS

Engine rpm	Line Pressure
Idle	750 kPa (108.8 psi) ± 400 kPa (58 psi)
2.0L - 2500 to 3000 rpm	5300 - 5700 kPa (768.5 - 826.5 psi) ± 400 kPa (58 psi)
2.4L - 2600 to 3100 rpm	5300 - 5700 kPa (768.5 - 826.5 psi) ± 400 kPa (58 psi)

Start the engine and warm the transmission to 50 - 80° C (122 - 174° F).
Turn the ignition off to the lock position.
Install an appropriate pressure gauge in the Line Pressure test port in accordance with the Service Information.
WARNING:
The CV Transmission can generate a line pressure up to 1800 psi. Failure to use recommended test equipment referred to by the Service Information can result in possible serious or fatal injury.
Using the scan tool, erase Transmission DTCs.
WARNING:
Apply the parking brake. Failure to follow these instructions can result in possible serious or fatal injury.
With the brakes firmly applied, start the engine allow to idle and shift the transmission into Reverse, Drive and Low while recording the scan tool Line pressure reading and the pressure gauge reading in each shift lever position.
With the brakes still firmly applied, raise the engine rpm between 2700 - 3250 rpm and shift the transmission into Reverse, Drive and Low while recording the scan tool line pressure reading and the pressure gauge reading in each shift lever position.
CAUTION:
Do not hold the engine rpm between 2700 - 3250 rpm for more than 5 seconds in any given shift position. If the five second threshold is exceeded, transmission damage can occur. Allow to idle in neutral between shifts for at least 15 to 20 seconds to allow transmission fluid to cool.

Do the gauge readings fall into the desired pressure ranges?

Yes
- Go To 4
No
- Go To 3

VERIFY PROBLEM

POSSIBLE CAUSES TO CONDITIONS DETECTED

ENGINE RPM	LINE PRESSURE CONDITION DETECTED	POSSIBLE CAUSES BUT NOT JUST LIMITED TO THESE
Idle speed	Low for all shift lever positions	Oil Pump Wear
		Pressure Regulator Valve for plug sticking or spring fatigue
		Oil filter, oil pump, pressure regulator valve passage oil leak
		Engine idle speed too low
	Only low for a specific position	Oil pressure leak in a passage or component related to the position after the pressure is distributed by the manual valve
	High	TP or APP sensor signal malfunction
		CVT fluid temperature sensor malfunction
		Line pressure solenoid sticking in the off state, filter plugged, cut line
		Pressure regulator valve or plug sticking
Engine rpm between 2700 and 3250 rpm	Line pressure does not rise above the line pressure at idle	TP or APP sensor signal malfunction
		Line pressure solenoid sticking in the on state, filter plugged
		Pressure regulator valve or plug sticking
		Transmission Control Module (TCM)
		Oil pump weak or worn
	Line Pressure rises but does not reach desired level	TP or APP sensor signal malfunction
		Line pressure solenoid sticking in the off state, filter plugged, cut line
		Pressure regulator valve or plug sticking
		Oil pump weak or worn
	Line pressure is low in only one shift lever position	Oil pressure leak in a passage or component related to the position after the pressure is distributed by the manual valve

Use the above chart to help identify the possible cause.
NOTE:
There may be other possible causes besides those listed on the above chart. Review any Service Bulletins and refer to the Service Information for any additional possible causes that may apply.

Repair
- Repair the CV Transmission as necessary in accordance with the Service Information
- Perform the CVT VERIFICATION TEST. Refer to CVT VERIFICATION TEST .

CHECK THE SECONDARY PRESSURE
1. Turn the ignition off to the lock position.
2. Disconnect the pressure gauge from the Line Pressure test port and reinstall the test port plug.
3. Install the pressure gauge in the Secondary Pressure test port in accordance with the Service Information.
4. Using the scan tool, erase Transmission DTCs.
  WARNING:
  Apply the parking brake. Failure to follow these instructions can result in possible serious or fatal injury.
5. With the brakes firmly applied, start the engine allow to idle and shift the transmission into Reverse, Drive and Low while comparing the Secondary Pressure gauge reading to the scan tool Secondary Pressure reading in each shift lever position and record your findings.
6. With the brakes still firmly applied, raise the engine rpm between 2700 - 3250 rpm and shift the transmission into Reverse, Drive and Low while comparing the gauge Secondary Pressure to the scan tool Secondary Pressure in each shift lever position and record your findings.
  CAUTION:
  Do not hold the engine rpm between 2700 - 3250 rpm for more than 5 seconds in any given shift position. If the five second threshold is exceeded, transmission damage can occur. Allow to idle in neutral between shifts for at least 15 to 20 seconds to allow transmission fluid to cool.
  
  Does the Secondary Pressure gauge readings match the scan tool readings in all of the above procedures?
  
  Yes
  - Replace the Valve Body in accordance with the Service Information for components related to the Secondary Pressure Control System.
  - Perform the CVT VERIFICATION TEST. Refer to CVT VERIFICATION TEST .
  No
  - Go To 5
CHECK THE SECONDARY PRESSURE SENSOR

Fig 1: Checking Secondary Pressure Sensor
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off to the lock position.
2. Disconnect the pressure gauge from the Secondary Pressure test port and reinstall the test port plug.
3. Disconnect the Transmission Solenoid/Pressure Switch Assembly harness connector.
4. Connect a jumper wire between the (T50) Secondary Pressure Sensor Signal circuit and the (T72) 5-Volt Supply circuit in the Transmission Solenoid/Pressure Switch Assembly harness connector.
5. Ignition on, engine not running.
6. With the scan tool read the Secondary Pressure voltage.
  Is the voltage between 4.5 and 5.5 Volts?
  
  Yes
  - Replace the Secondary Pressure Sensor (Valve Body) in accordance with the Service Information.
  - Perform the CVT VERIFICATION TEST. Refer to CVT VERIFICATION TEST .
  No
  - Go To 6
CHECK THE (T21) PRIMARY PRESSURE SENSOR SIGNAL CIRCUIT FOR HIGH RESISTANCE

Fig 2: Checking Primary Pressure Sensor Signal Circuit For High Resistance
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off to the lock position.
2. Disconnect the TCM C2 harness connector.
3. Connect a jumper wire between the B(+) and the (T21) Primary Pressure Sensor Signal circuit in the Transmission Solenoid/Pressure Switch harness connector.
4. Using a 12-volt test light connected to ground, check the (T21) Primary Pressure Sensor Signal circuit in the TCM C2 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
  - 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 Service Information.
  - Perform the CVT VERIFICATION TEST. Refer to CVT VERIFICATION TEST .
  No
  - Repair the (T21) Primary Pressure Sensor Signal circuit for an open (high resistance).
  - Perform the CVT VERIFICATION TEST. Refer to CVT VERIFICATION TEST .
INTERMITTENT 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. Refer to CVT VERIFICATION TEST .
  No
  - Test Complete.