Diagnostic Test

CHECK FOR SPEED SENSOR OR SENSOR SUPPLY VOLTAGE DTCS
1. With the scan tool, check for other transmission DTCs.
  Are any Input Speed Sensor and/or Sensor Supply Voltage DTCs present?
  
  Yes
  - Refer to the DIAGNOSTIC CODE INDEX and perform the appropriate diagnostic procedure.
  No
  - Go To 2.
CHECK TO SEE IF INPUT SENSOR MISMATCH IS CURRENT
NOTE:
If the TCM detects and stores a DTC, the TCM also stores the vehicles operating conditions under which the DTC originally set and is located in scan tool under Environmental Data. Before erasing any stored DTCs, record any available data to assist in duplicating the conditions in which the DTC originally set.
1. With the scan tool, record the Environmental Data and erase Transmission DTCs.
2. Using the Environmental Data recorded earlier, test drive the vehicle while trying to duplicate the conditions in which the DTC originally set.
  Did the DTC P2784-INPUT SPEED SENSOR 1/2 CORRELATION reset?
  
  Yes
  - Go To 3.
  No
  - Go To 4.
INTERNAL TRANSMISSION
1. Turn the ignition off to the lock position.
2. Remove the Transmission Oil Pan and inspect for debris, a plugged Transmission Oil Filter, or any sign of an internal transmission problem.
  Is there any debris, plugged Transmission Oil Filter, or any sign of an internal transmission problem?
  
  Yes
  - Repair as necessary in accordance with the Service Information.
  - Perform NAG1 TRANSMISSION VERIFICATION TEST. Refer to NAG1 TRANSMISSION VERIFICATION TEST .
  No
  - 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 NAG1 TRANSMISSION VERIFICATION TEST. Refer to NAG1 TRANSMISSION 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 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 NAG1 TRANSMISSION VERIFICATION TEST. Refer to NAG1 TRANSMISSION VERIFICATION TEST .
  No
  - Test Complete.