Diagnostic Test

CHECK IF DTC IS CURRENT
1. With the scan tool, read TCM DTCs.
2. Record the Environmental Data and any DTCs.
3. With the scan tool, erase 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. With the scan tool, read TCM DTCs.
  Did the DTC reset?
  
  Yes
  - Go To 2
  No
  - Go To 5
CHECK (T14) OUTPUT SPEED SIGNAL CIRCUIT FOR AN OPEN
1. Turn the Ignition OFF.
2. Disconnect the Transmission Assembly harness connector.
3. Disconnect the TCM harness connector.
4. Measure the resistance of the (T14) Output Speed Signal circuit between the TCM harness connector and the Transmission Assembly harness connector.
  Is the resistance below 5.0 ohms?
  
  Yes
  - Go To 3
  No
  - Repair the (T14) Output Speed Signal circuit for an open.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK (T14) OUTPUT SPEED SIGNAL CIRCUIT FOR A SHORT TO GROUND OR ANOTHER CIRCUIT
1. Measure the resistance between ground and the (T14) Output Speed Signal circuit.
2. Measure the resistance between the (T14) Output Speed Signal circuit and all other circuits in the TCM harness connector.
  Is there continuity between the (T14) Output Speed Signal circuit and ground or another circuit?
  
  Yes
  - Repair the (T14) Output Speed Signal circuit for a short to ground or another circuit.
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  
  Go To 4
CHECK OUTPUT SPEED SENSOR FOR AN OPEN
NOTE:
The Output Speed Sensor must be at room temperature to perform the next test.
1. With the RED lead on terminal 24 and the BLACK lead on terminal 22, measure the resistance of the Output Speed Sensor at the Transmission side of the Transmission Assembly harness connector.
  Is the resistance between 5.5 and 7.0 ohms?
  
  Yes
  
  NOTE:
  If this Electronic Control Unit (ECU) is being replaced with a new unit, a diagnostic scan tool MUST be used to align the PROXI configuration data into the new ECU. Follow the routine outlined in the diagnostic scan tool for PROXI Configuration Alignment under Body Control Module (BCM) Miscellaneous Functions menu.
  - Using the schematics as a guide, check the Transmission Control Module (TCM) terminals and connectors for corrosion, damage or pushed out terminals. Pay particular attention to the power and ground circuits. If no problems are found, replace the TCM and perform programming and PROXI Configuration Alignment procedures. Refer to MODULE, TRANSMISSION CONTROL, REMOVAL .
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Replace the Output Speed Sensor in accordance with the Service Information.
  - Perform the TRANSMISSION 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 TRANSMISSION VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Test complete.