Diagnostic Test

WARNING: This page is about a different car, the 2012 RAM Pickup and 2012 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR RELATED ENGINE DTCs
1. With the scan tool, view Engine DTCs.
  Are there any Engine Coolant and/or Ambient DTCs present?
  
  Yes
  - Refer to DIAGNOSTIC CODE INDEX for 3.7L/4.7L/5.7L or DIAGNOSTIC CODE INDEX for 6.7L and perform the appropriate diagnostic procedure.
  No
  - Go To 2.
CHECK FOR RELATED TRANSMISSION DTCs
1. With the scan tool, view Transmission DTCs.
  Are there any other Transmission temperature sensor DTCs?
  
  Yes
  - Refer to DIAGNOSTIC CODE INDEX and perform the appropriate DTC diagnostic procedure.
  No
  - Go To 3.
CHECK IF DTC IS CURRENT
1. Using the scan tool, read TCM DTCs.
2. Record the Environmental Data and any DTCs.
3. Clear DTCs.
4. Using the recorded Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
5. Read TCM DTCs.
  Did the DTC reset?
  
  Yes
  - Go To 4.
  No
  - Go To 9.
COMPARE THE TORQUE CONVERTER OUT OIL TEMPERATURE TO ENGINE COOLANT TEMPERATURE
NOTE:
To test the torque converter out oil temperature sensor, the engine and transmission temperature must be at or below 29.4° C (85° F).
1. With the scan tool, read the Torque Converter Out Oil Temperature and Engine temperatures.
  Is the torque converter out oil temperature within 5° C (9° F) of the engine coolant temperature?
  
  Yes
  - Go To 5.
  No
  - Go To 8.
CHECK IF THE TORQUE CONVERTER OUT OIL TEMPERATURE INCREASES 15 DEGREES OVER 10 MINUTE PERIOD
NOTE:
To test the torque converter out oil temperature sensor, the engine and transmission temperature must be at or below 29.4° C (85° F).

CAUTION:
Apply the parking brake.
1. Start the engine, firmly apply the brakes and allow the engine to idle in Drive.
2. With the scan tool, monitor the Torque Converter Out Oil Temperature.
  NOTE:
  If the torque converter out oil temperature sensor is working properly, the transmission temperature should rise at least 8° C (15° F) within a ten minute period.
3. Did the torque converter out oil temperature increase at a steady rate and rise at least 8° C (15° F) over a 10 minute period?
  
  Yes
  - Go To 9.
  No
  - Go To 6.
CHECK THE (T819) TORQUE CONVERTER OUT OIL TEMPERATURE SENSOR SIGNAL CIRCUIT
1. Turn the ignition off to the lock position.
2. Disconnect the Torque Converter Out Oil Temperature sensor harness connector.
  NOTE:
  Check connectors - Clean/repair as necessary
3. Ignition on, engine not running.
4. With the scan tool, monitor the Torque Converter Out Oil Temperature.
  Does the Torque Converter Out Oil Temperature read -40° C (-40° F) ± 2° C (4° F)?
  
  Yes
  - Go To 7.
  No
  - Refer to DIAGNOSTIC CODE INDEX and perform P2743-TRANSMISSION FLUID TEMPERATURE SENSOR 2 HIGH as if the DTC is active.
  - Refer to STANDARD PROCEDURE and perform the AS68RC VERIFICATION TEST.
CHECK THE (T819) TORQUE CONVERTER OUT OIL TEMPERATURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND

Fig 1: Checking Torque Converter Out Oil Temperature Sensor Signal Circuit For A Short To Ground
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off to the lock position.
2. Connect a jumper wire between the (T819) Torque Converter Out Oil Signal circuit and the (T820) Sensor Ground circuit in the Torque Converter Out Oil Temperature sensor harness connector.
3. Ignition on, engine not running.
4. With the scan tool, monitor the Torque Converter Out Oil Temperature.
  Does the Torque Converter Out Oil Temperature read 200° C (392° F) ± 2° C (4° F)?
  
  Yes
  - Go To 8.
  No
  - Refer to DIAGNOSTIC CODE INDEX and perform P2742-TRANSMISSION FLUID TEMPERATURE SENSOR 2 LOW as if the DTC is active.
  - Refer to STANDARD PROCEDURE and perform the AS68RC VERIFICATION TEST.

CHECK THE TRANSMISSION TEMPERATURE SENSOR

Fig 2: Checking Transmission Temperature Sensor And Circuits

Courtesy of CHRYSLER GROUP, LLC

TYPICAL VALUES FOR TRANSMISSION TEMPERATURE SENSOR
TEMPERATURE	APPROXIMATE OHM
-30° C (-22° F)	44000 Ohms
10° C (50° F)	6400 Ohms
110° C (230° F)	200 Ohms
145° C (293° F)	100 Ohms

Turn the ignition off to the lock position.
Reconnect the Torque Converter Out Oil Temperature sensor harness connector.
Disconnect the TCM C3 harness connector.
NOTE:
Check connectors - Clean/repair as necessary
Measure the resistance of the Torque Converter Out Oil Temperature Sensor between the (T819) Transmission Temperature Signal circuit and the (T820) Sensor Ground circuit in the TCM C3 harness connector.
Using the chart at the chart above, compare the Torque Converter Out Oil temperature to the correlating resistance value.
Is the resistance within the specified range when the sensor is at the given temperature?

Yes
- Go To 9.
No
- Replace the Torque Converter Out Oil Temperature Sensor in accordance with the Service Information.
- Refer to STANDARD PROCEDURE and perform the AS68RC VERIFICATION TEST.

CHECK WIRING AND CONNECTORS
1. The conditions necessary to set the 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. Check for any Service Bulletins that may apply.
  Were there any problems found?
  
  Yes
  - Repair as necessary.
  - Refer to STANDARD PROCEDURE and perform the AS68RC VERIFICATION TEST.
  No
  - Test Complete.