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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 89 ((Transmission Control Module (TCM) - Electrical Diagnostics - As68RC Automatic Transmission)) >> Diagnosis and Testing >> P0717-Input Speed Sensor 1 Circuit No Signal >> Diagnostic Test

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 
(T52) INPUT SPEED SIGNAL CIRCUIT OPEN
(T52) INPUT SPEED SIGNAL CIRCUIT SHORT TO GROUND
(T52) INPUT SPEED SIGNAL CIRCUIT SHORT TO VOLTAGE
(T52) INPUT SPEED SIGNAL CIRCUIT SHORT TO ANOTHER CIRCUIT
(T72) 8 VOLT SUPPLY CIRCUIT OPEN
(T72) 8 VOLT SUPPLY CIRCUIT SHORT TO GROUND
(T72) 8 VOLT SUPPLY CIRCUIT SHORT TO ANOTHER CIRCUIT
INPUT SPEED SENSOR
DAMAGED OR MAGNETIZED TONE RING
TRANSMISSION CONTROL MODULE

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



  1. CHECK IF THE 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.
      NOTE:

      It may be necessary to road test the vehicle to duplicate the original set conditions.

    5. Read TCM DTCs.

      Did the DTC reset?

      Yes 

      • Go To  2.

      No 

      • Go To  11.
  2. CHECK THE (T72) 8 VOLT SUPPLY CIRCUIT 
    Fig 1: Checking 8 Volt Supply Circuit
    GC0111535Courtesy of CHRYSLER LLC
    1. Turn the ignition off to the lock position.
    2. Disconnect the Input Speed Sensor harness connector.
    3. Ignition on, engine not running.
    4. Measure the voltage of the (T72) 8 Volt Supply circuit in the Input Speed Sensor harness connector.

      Is the voltage 8.0 volts (± 0.2 of a volt)?

      Yes 

      • Go To  3.

      No 

      • Go To  4.
  3. LOAD TEST THE (T72) 8 VOLT SUPPLY CIRCUIT 
    Fig 2: Load Testing 8 Volt Supply Circuit
    GC0111536Courtesy of CHRYSLER LLC
    1. Turn the ignition off to the lock position.
    2. Disconnect the TCM C2 harness connector.
    3. Disconnect the Input Speed Sensor and the Output Speed Sensor harness connectors.
    4. Using a jumper wire, ground the (T72) 8 Volt Supply circuit in the Input Speed Sensor harness connector.
    5. Using a 12-volt test light connected to B (+), probe the (T72) 8 Volt Supply circuit on the appropriate terminal of TCM C2 harness connector.

      Does the test light illuminate brightly?

      Yes 

      • Go To  6.

      No 

      • Go To  4.
  4. CHECK THE (T72) 8 VOLT SUPPLY CIRCUIT FOR AN OPEN 
    Fig 3: Checking 8 Volt Supply Circuit For An Open
    GC0111537Courtesy 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 (T72) 8 Volt Supply circuit between the TCM C2 harness connector and the Input Speed Sensor harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  5.

      No 

      • Repair the (T72) 8 Volt Supply circuit for an open.
      • Perform AS68RC VERIFICATION TEST. Refer to Standard Procedure .
  5. CHECK THE (T72) 8 VOLT SUPPLY CIRCUIT FOR A SHORT TO GROUND 
    Fig 4: Checking 8 Volt Supply Circuit For A Short To Ground
    GC0111538Courtesy of CHRYSLER LLC
    1. Measure the resistance between ground and the (T72) 8 Volt Supply Signal circuit.

      Is the resistance below 100k Ohms?

      Yes 

      • Repair the (T72) 8 Volt Supply circuit for a short to ground.
      • Perform AS68RC VERIFICATION TEST. Refer to Standard Procedure .

      No 

      • Using the schematics as a guide, check the Transmission Control Module (TCM) pins, terminals, and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace and program the TCM in accordance with the Service Information.
      • Perform AS68RC VERIFICATION TEST. Refer to Standard Procedure .
  6. CHECK THE (T52) INPUT SPEED SENSOR SIGNAL CIRCUIT FOR AN OPEN 
    Fig 5: Checking Input Speed Sensor Signal Circuit For An Open
    GC0111539Courtesy of CHRYSLER LLC
    1. Disconnect the TCM C1 harness connector.
    2. Disconnect the Input Speed Sensor harness connector.
    3. Measure the resistance of the (T52) Input Speed Sensor Signal circuit between the TCM C1 harness connector and the Input Speed Sensor harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  7.

      No 

      • Repair the (T52) Input Speed Sensor Signal circuit for an open.
      • Perform AS68RC VERIFICATION TEST. Refer to Standard Procedure .
  7. CHECK THE (T52) INPUT SPEED SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND 
    Fig 6: Checking Input Speed Sensor Signal Circuit For A Short To Ground
    GC0111540Courtesy of CHRYSLER LLC
    1. Measure the resistance between ground and the (T52) Input Speed Sensor Signal circuit.

      Is the resistance below 100k Ohms?

      Yes 

      • Repair the (T52) Input Speed Sensor Signal circuit for a short to ground.
      • Perform AS68RC VERIFICATION TEST. Refer to Standard Procedure .

      No 

      • Go To  8.
  8. CHECK THE (T52) INPUT SPEED SENSOR SIGNAL CIRCUIT FOR A SHORT TO ANOTHER CIRCUIT 
    Fig 7: Checking Input Speed Sensor Signal Circuit For A Short To Another Circuit
    GC0111541Courtesy of CHRYSLER LLC
    1. Measure the resistance between the (T52) Input Speed Sensor Signal circuit and all other circuits in the TCM C1 harness connector.

      Is the resistance below 100k Ohms between the (T52) Input Speed Sensor Signal circuit and any other circuit(s) in the TCM C1 harness connector?

      Yes 

      • Repair the (T52) Input Speed Sensor Signal circuit for a short to another circuit(s).
      • Perform AS68RC VERIFICATION TEST. Refer to Standard Procedure .

      No 

      • Go To  9.
  9. CHECK THE (T52) INPUT SPEED SENSOR SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE 
    Fig 8: Checking Input Speed Sensor Signal Circuit For A Short To Voltage
    GC0111542Courtesy of CHRYSLER LLC
    1. Ignition on, engine not running.
    2. Measure the voltage of the (T52) Input Speed Sensor Signal circuit.

      Is there any voltage present?

      Yes 

      • Repair the (T52) Input Speed Sensor Signal circuit for a short to voltage.
      • Perform AS68RC VERIFICATION TEST. Refer to Standard Procedure .

      No 

      • Go To  10.
  10. REPLACE THE INPUT SPEED SENSOR 
    1. Turn the ignition off to the lock position.
    2. Replace the Input Speed Sensor.
    3. Inspect the internal tone ring for damaged or missing teeth.
    4. Reconnect all connectors.
    5. Clear DTCs and road test the vehicle under the conditions in which the original DTC set.

      Did the Input Speed Sensor DTC reset?

      Yes 

      • Using the schematics as a guide, check the Transmission Control Module (TCM) pins, terminals, and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace and program the TCM in accordance with the Service Information.
      • Perform AS68RC VERIFICATION TEST. Refer to Standard Procedure .

      No 

  11. CHECK THE WIRING AND CONNECTORS 
    1. The conditions necessary to set this DTC are not present at this time.
    2. Use the Freeze Frame Data to help duplicate the conditions in which the DTC originally set. Pay particular attention to the DTC set conditions, such as, VSS, MAP, ECT, and Load
    3. Using the schematics as a guide, visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or partially broken wires.
    4. Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.
    5. Wiggle the wiring and connectors while checking for any possible open or shorted circuits.
    6. Check for any Service Information Tune-ups or Technical Service Bulletins that may apply.

      Were there any problems found?

      Yes 

      No 

      • Test Complete.
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