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Home >> Dodge and Ram >> 2013 >> Challenger SXT >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> (Transmission Control Module (TCM) - Electrical Diagnostics) >> DTC Troubleshooting >> P2767-Input Speed Sensor 2 Circuit No Signal >> Diagnostic Test
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Diagnostic Test

  1. CHECK IF DTC IS CURRENT 
    NOTE:

    The Transmission Control Module stores under Environmental Data the transmission operating conditions when the DTC was set. Before erasure of any DTC, record all information pertaining to the DTC, even if there is more than one DTC stored.

    1. With the scan tool, erase transmission DTCs.
    2. Using the Environmental Data previously recorded, drive the vehicle and try to duplicate the conditions in which the DTC originally set.

      Did the DTC P2767 reset?

      Yes 

      • Go to step  2

      No 

      • Go to step  10
  2. CHECK THE (T72) SENSOR SUPPLY VOLTAGE CIRCUIT FOR AN OPEN 
    Fig 1: Checking Sensor Supply Voltage Circuit For An Open
    GC0097946Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off to the lock position.
    2. Disconnect the TCM C2 harness connector.
    3. Disconnect the Electrohydraulic Control Unit Assembly harness connector.
      NOTE:

      Check connectors - Clean/repair as necessary.

    4. Measure the resistance of the (T72) Sensor Supply Voltage circuit from the TCM C2 harness connector to the Electrohydraulic Control Unit Assembly harness connector.

      Is the resistance above 5.0 Ohms?

      Yes 

      • Repair the (T72) Sensor Supply Voltage circuit for an open.
      • Perform the NAG1 TRANSMISSION VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go to step  3
  3. CHECK THE (T71) INPUT SPEED SENSOR 2 (N3) SIGNAL CIRCUIT FOR AN OPEN 
    Fig 2: Checking Input Speed Sensor 2 Signal Circuit For An Open
    GC0097979Courtesy of CHRYSLER GROUP, LLC
    1. Measure the resistance of the (T71) Input Speed Sensor 2 (N3) Signal circuit from the TCM C2 harness connector to the Electrohydraulic Control Unit Assembly harness connector.

      Is the resistance above 5.0 Ohms?

      Yes 

      • Repair the (T71) Input Speed Sensor 2 (N3) Signal circuit for an open.
      • Perform the NAG1 TRANSMISSION VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go to step  4
  4. CHECK THE (T13) SENSOR GROUND CIRCUIT FOR AN OPEN 
    Fig 3: Checking Sensor Ground Circuit For An Open
    GC0097948Courtesy of CHRYSLER GROUP, LLC
    1. Measure the resistance of the (T13) Sensor Ground circuit from the TCM C2 harness connector to the Electrohydraulic Control Unit Assembly harness connector.

      Is the resistance above 5.0 Ohms?

      Yes 

      • Repair the (T13) Sensor Ground circuit for an open.
      • Perform the NAG1 TRANSMISSION VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go to step  5
  5. CHECK THE (T71) INPUT SPEED SENSOR 2 (N3) SIGNAL CIRCUIT FOR A SHORT TO ANOTHER CIRCUIT(S) 
    Fig 4: Checking Input Speed Sensor 2 Signal Circuit For Short To Another Circuit
    GC0097980Courtesy of CHRYSLER GROUP, LLC
    1. Measure the resistance of the (T71) Input Speed Sensor 2 (N3) Signal circuit to all the other circuits in the Electrohydraulic Control Unit Assembly harness connector.

      Is the resistance below 5.0 Ohms between the (T71) Input Speed Sensor 2 (N3) Signal circuit and any other circuit(s) in the Electrohydraulic Control Unit Assembly harness connector?

      Yes 

      • Repair the (T71) Input Speed Sensor 2 (N3) Signal circuit for a short to another circuit(s).
      • Perform the NAG1 TRANSMISSION VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go to step  6
  6. CHECK THE (T71) INPUT SPEED SENSOR 2 (N3) SIGNAL CIRCUIT FOR A SHORT TO GROUND 
    Fig 5: Checking Input Speed Sensor 2 Signal Circuit For Short To Ground
    GC0097981Courtesy of CHRYSLER GROUP, LLC
    1. Measure the resistance between ground and the (T71) Input Speed Sensor 2 (N3) Signal circuit.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Repair the (T71) Input Speed Sensor 2 (N3) Signal circuit for a short to ground.
      • Perform the NAG1 TRANSMISSION VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go to step  7
  7. CHECK THE (T13) SENSOR GROUND CIRCUIT FOR A SHORT TO ANOTHER CIRCUIT(S) 
    Fig 6: Checking Sensor Ground Circuit For Short To Another Circuit
    GC0097951Courtesy of CHRYSLER GROUP, LLC
    1. Measure the resistance between the (T13) Sensor Ground circuit to all the other circuits in the Electrohydraulic Control Unit Assembly harness connector.

      Is the resistance below 5.0 Ohms between the (T13) Sensor Ground circuit and any other circuit(s) in the Electrohydraulic Control Unit Assembly harness connector.

      Yes 

      • Repair the (T13) Sensor Ground circuit for a short to another circuit(s)
      • Perform the NAG1 TRANSMISSION VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go to step  8
  8. CHECK THE (T13) SENSOR GROUND CIRCUIT FOR A SHORT TO GROUND 
    Fig 7: Checking Sensor Ground Circuit For Short To Ground
    GC0097952Courtesy of CHRYSLER GROUP, LLC
    1. Measure the resistance between ground and the (T13) Sensor Ground circuit.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Repair the (T13) Sensor Ground circuit for a short to ground.
      • Perform the NAG1 TRANSMISSION VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go to step  9
  9. CHECK THE INPUT SPEED SENSOR 2 (N3) SIGNAL 
    Fig 8: Checking Input Speed Sensor 2 Signal
    GC0097982Courtesy of CHRYSLER GROUP, LLC
    1. Reconnect the Electrohydraulic Control Unit Assembly harness connector.
    2. Using a Lab Scope, backprobe the (T71) Input Speed Sensor 2 (N3) Signal circuit at the TCM C2 harness connector.
      Fig 9: Typical 5-Volt Square Wave Pattern
      GC0097954Courtesy of CHRYSLER GROUP, LLC
      WARNING:

      Properly support the vehicle.

    3. Raise all drive wheels off the ground.
    4. Start the engine.
      WARNING:

      To avoid possible serious or fatal injury, keep hands and feet clear of rotating wheels.

    5. Place gear selector in drive and increase vehicle speed to engage 2nd gear.
    6. Compare the scope pattern on the Lab Scope with a typical 5-volt square wave pattern.

      Is the scope pattern comparable to the typical 5-volt square wave signal scope pattern?

      Yes 

      • Using the schematics as a guide, check the Transmission Control Module (TCM) connectors and terminals 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 the NAG1 TRANSMISSION VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Replace the Input Speed Sensor 2 (N3) in accordance with the Service Information.
      • Perform NAG1 TRANSMISSION VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  10. 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 wiring and connectors while checking for any possible open or shorted circuits.
    4. Check for any Service Information Tune-ups or Technical Service Bulletins that may apply.

      Were there any problems found?

      Yes 

      • Repair as necessary.
      • Perform the NAG1 TRANSMISSION VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Test Complete.
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