Diagnostic Test

WARNING: This page is about a different variant/trim than selected.

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.
  NOTE:
  If there are any other Engine and/or Transmission DTCs, diagnosis those first.
  
  Did the DTC reset?
  
  Yes
  - Go To 2
  No
  - Go To 7
CHECK THE TORQUE CONVERTER CLUTCH (TCC) OPERATION
1. Clear Transmission DTCs.
2. Road test the vehicle in a condition that will enable TCC lock up.
3. Using the scan tool, record the Engine speed and the Transmission Input speed during TCC lock up.
4. Using the set condition listed above, calculate the TCC slip rpm.
  Is the TCC slip rpm greater than 100 rpm?
  
  Yes
  - Go To 3
  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. Refer to MODULE, TRANSMISSION CONTROL (TCM), REMOVAL AND INSTALLATION .
  - Perform the VERIFICATION TEST.
CHECK THE L-UP LINEAR SOLENOID
1. Turn the ignition off to the lock position.
2. Disconnect TCM harness connector.
3. Measure the resistance of the L-Up Linear Solenoid between the appropriate terminals of the TCM harness connector.
  Is the resistance 5.0 - 5.6 Ohms?
  
  Yes
  - Go To 4
  No
  - Replace the L-Up Linear Solenoid in accordance with the Service Information. Refer to VALVE BODY, REMOVAL AND INSTALLATION .
  - Perform the VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST .
CHECK THE L-UP LINEAR SOLENOID FOR A SHORT TO GROUND
1. Measure the resistance of the L-Up Linear Solenoid between ground the appropriate terminals of the TCM harness connector.
  Is the resistance below 100k Ohms?
  
  Yes
  - Go To 5.
  No
  - Go To 6
CHECK THE L-UP LINEAR SOLENOID WIRING FOR A SHORT TO GROUND
1. Disconnect the Transmission harness connector at the transmission.
2. Measure the resistance of the L-Up Linear Solenoid between ground the appropriate terminals of the TCM harness connector.
  Is the resistance below 100k Ohms?
  
  Yes
  - Repair the L-up solenoid for a short to ground between the TCM and the Transmission.
  - Perform the VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST .
  No
  - Go To 6
CHECK INTERNAL TRANSMISSION
1. Turn the ignition off to the lock position.
2. Remove the Transmission Oil Pan.
3. Check the internal transmission harness, pins, terminals, and connectors for shorts, corrosion, damage, or terminal push out.
4. Visually inspect the valve body for debris, damage or leaking hydraulic paths.
5. Visually inspect for sticking or binding Control Valve(s).
  Were there any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST .
  No
  - Replace the Torque Converter in accordance with the Service Information.
  - Perform the VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST .
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 VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST .
  No
  - Test Complete.