Diagnostic Test

WARNING: This page is about a different car, the 2011 RAM Pickup and 2011 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

Possible Causes
RELATED ENGINE TEMPERATURE SENSOR DTCS
RELATED TRANSMISSION TEMPERATURE SENSOR DTCS
INTERMITTENT TRANSMISSION TEMPERATURE SENSOR
TRANSMISSION TEMPERATURE SENSOR
TRANSMISSION CONTROL MODULE (TCM)

Always perform the AS68RC Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to Standard Procedure .

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 6.7L DIESEL - DIAGNOSTIC CODE INDEX - 2500 & 3500 or 6.7L DIESEL - DIAGNOSTIC CODE INDEX - 3500 CAB & CHASSIS, 4500 & 5500 and perform the appropriate diagnostic procedure.
  No
  - Go To 2.
CHECK FOR RELATED TRANSMISSION DTCs
1. With the scan tool, view Transmission DTCs.
2. Record any Transmission Freeze Frame data.
  Are there any other Transmission temperature sensor DTCs?
  
  Yes
  - Perform the appropriate 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 TRANSMISSION TEMPERATURE TO ENGINE COOLANT TEMPERATURE
NOTE:
To test the transmission temperature sensor, the engine and transmission temperature must be at or below 29.4° C (85° F).
1. With the scan tool, read the Transmission and Engine temperatures.
  Is the transmission temperature within 5° C (9° F) of the engine coolant temperature?
  
  Yes
  - Go To 5.
  No
  - Go To 8.
CHECK IF THE TRANSMISSION TEMPERATURE INCREASES 15 DEGREES OVER 10 MINUTE PERIOD
NOTE:
To test the transmission 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 Transmission Temperature.
  NOTE:
  If the transmission temperature sensor is working properly, the transmission temperature should rise at least 8° C (15° F) within a ten minute period.
3. Did the transmission 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 (T54) TRANSMISSION TEMPERATURE SENSOR SIGNAL CIRCUIT
1. Turn the ignition off to the lock position.
2. Disconnect the Transmission Solenoid Assembly C1 harness connector.
  NOTE:
  Check connectors - Clean/repair as necessary.
3. Ignition on, engine not running.
4. With the scan tool, monitor the Transmission Oil Temperature.
  Does the Transmission Oil Temperature read -40° C (-40° F) ± 2° C (4° F)?
  
  Yes
  - Go To 7.
  No
  - Perform P0713-TRANSMISSION TEMPERATURE SENSOR 1 HIGH as if the DTC is active.
  - Perform the AS68RC VERIFICATION TEST. Refer to Standard Procedure .
CHECK THE (T54) TRANSMISSION TEMPERATURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND

Fig 1: Checking Transmission Temperature Sensor Signal Circuit For A Short To Ground
Courtesy of CHRYSLER LLC
1. Turn the ignition off to the lock position.
2. Connect a jumper wire between the (T54) Transmission Temperature Signal circuit and the (T820) Sensor Ground circuit in the Transmission Solenoid Assembly C1 harness connector.
3. Ignition on, engine not running.
4. With the scan tool, monitor the Transmission Oil Temperature.
  Does the Transmission Oil Temperature read 200° C (392° F) ± 2° C (4° F)?
  
  Yes
  - Go To 8.
  No
  - Perform the diagnostic procedure for P0712-TRANSMISSION TEMPERATURE SENSOR 1 LOW as if the DTC is active.
  - Perform the AS68RC VERIFICATION TEST. Refer to Standard Procedure .

CHECK THE TRANSMISSION TEMPERATURE SENSOR

Fig 2: Checking Transmission Temperature Sensor

Courtesy of CHRYSLER LLC

TYPICAL VALUES FOR TRANSMISSION TEMPERATURE SENSOR
TEMPERATURE	APPROXIMATE OHM
-30° C (-22° F)	44000 Ohms ± 6600
10° C (50° F)	6455 Ohms ± 645
110° C (230° F)	247 Ohms ± 16
145° C (293° F)	111 Ohms ± 6

Turn the ignition off to the lock position.
Reconnect the Transmission Solenoid harness connector.
Disconnect the TCM C2 and C3 harness connectors.
NOTE:
Check connectors - Clean/repair as necessary
Measure the resistance of the Transmission Temperature Sensor between the (T54) Transmission Temperature Signal circuit in the TCM C2 harness connector and the (T820) Sensor Ground circuit in the TCM C3 harness connector.
Using the chart at the chart above, compare the Temperature Sensor 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
- Remove the Transmission Oil Pan and inspect the internal Transmission harness, pins, terminals, and connectors for corrosion, damage, or terminal push out. If no problems are found, replace the Transmission Temperature Sensor in accordance with the Service Information.
- Perform the AS68RC VERIFICATION TEST. Refer to Standard Procedure .

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.
  - Perform the AS68RC VERIFICATION TEST. Refer to Standard Procedure .
  No
  - Test Complete.