Milan FWD L4-2.3L (2008)
Torque Converter: Testing and Inspection
Torque Converter Diagnosis
6 Speed - Automatic Transmission
Torque Converter Diagnosis
Special Tool(s)
Prior to torque converter installation, all diagnostic procedures must be followed. This is to prevent the unnecessary installation of new or
remanufactured torque converters. Only after a complete diagnostic evaluation can the decision be made to install a new or remanufactured torque
converter.
Begin with the normal diagnostic procedures as follows:
1. Preliminary Inspection
2. Know and Understand the Customer's Concern
3. Verify the Concern - carry out the torque converter operation test
4. Carry out Diagnostic Procedures:
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Run On-Board Diagnostics.
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Repair all non-transaxle related DTCs first.
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Repair all transaxle DTCs.
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Rerun On-Board Diagnostic to verify repair.
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Carry out Line Pressure Test. Refer to Special Testing Procedures. See: Transmission Control Systems/Testing and Inspection/Component
Tests and General Diagnostics/Special Testing Procedures/6 Speed - Automatic Transmission
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Carry out Stall Speed Test. Refer to Special Testing Procedures. See: Transmission Control Systems/Testing and Inspection/Component
Tests and General Diagnostics/Special Testing Procedures/6 Speed - Automatic Transmission
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Carry out diagnostic routines. Refer to Diagnosis By Symptom. See: Transmission Control Systems/Testing and Inspection/Symptom
Related Diagnostic Procedures/Symptoms/6 Speed - Automatic Transmission
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Use the index to locate the appropriate routine that best describes the symptom(s). The routine will list all possible components that may
cause or contribute to the symptom. Check each component listed, diagnose and repair as required, before repairing the torque converter.
Torque Converter Operation Test
NOTE: The torque converter clutch (TCC) will not engage if the transmission fluid temperature (TFT) is below 0°C (32°F).
1. Using the scan tool, make sure that the TFT is within specification 43°C-47°C (109°F-117°F).
2. Accelerate the vehicle to 35-60 km/h (22-37 mph) and maintain a consistent speed.
3. Release the accelerator pedal to close the throttle and press the accelerator to partially open the throttle while monitoring the scan tool engine
speed and TCCAMP_MES. The PID will read 0 when the TCC clutch is released, and 1 when the TCC is applied. The engine speed will increase
when the TCC is released and decrease when the TCC is applied.
4. If these actions do not occur, see torque converter operation concerns, refer to Diagnosis By Symptom. See: Transmission Control
Systems/Testing and Inspection/Symptom Related Diagnostic Procedures/Symptoms/6 Speed - Automatic Transmission
FNR5 - Automatic Transaxle
Torque Converter Diagnosis
