Mariner 4WD L4-2.5L (2010)
Torque Converter: Testing and Inspection
Torque Converter Diagnosis
Torque Converter Diagnosis
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 concern
3. Verify the concern - carry out the Torque Converter Clutch (TCC) Operation Test See: Torque Converter Clutch (TCC) Operation Test
4. Carry out diagnostic procedures:
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Run On-Board Diagnostic (OBD). Refer to Diagnostics See: Transmission Control Systems/Testing and Inspection/Initial Inspection and
Diagnostic Overview/Diagnostics.
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Repair all non-transmission related DTCs first.
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Repair all transmission DTCs.
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Rerun OBD to verify repair.
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Carry out Line Pressure Test. Refer to Special Testing Procedures See: Testing and Inspection/Component Tests and General
Diagnostics/6F35/Special Testing Procedures/Special Testing Procedures. See: Testing and Inspection/Component Tests and General
Diagnostics/6F35/Special Testing Procedures/Line Pressure Test
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Carry out Stall Speed Test. Refer to Special Testing Procedures See: Testing and Inspection/Component Tests and General
Diagnostics/6F35/Special Testing Procedures/Special Testing Procedures. See: Testing and Inspection/Component Tests and General
Diagnostics/6F35/Special Testing Procedures/Stall Speed Test
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Carry out diagnostic routines. Refer to Diagnosis By Symptom See: Transmission Control Systems/Testing and Inspection/Symptom
Related Diagnostic Procedures/Diagnosis By Symptom. See: Transmission Control Systems/Testing and Inspection/Symptom Related
Diagnostic Procedures/Diagnostic Routines
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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 installing a new torque
converter.
