Escape 2WD L4-2.3L VIN Z (2005)
Torque Converter: Testing and Inspection
Torque Converter Diagnosis
Prior to installing a new or remanufactured torque converter, 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. See: Transmission Control Systems/Testing and Inspection/Initial Inspection and Diagnostic Overview/Initial
Inspection/Preliminary Inspection
2. Know and Understand the Customers Concern.
3. Verify the Concern-Carry out the Torque Converter Operation Test. See: Transmission Control Systems/Testing and Inspection/Component Tests
and General Diagnostics/Torque Converter Diagnosis
4. Carry out Diagnostic Procedures.
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Carry out On-Board Diagnostics. See: Transmission Control Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble
Codes/Displaying & Reading Trouble Codes
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Repair all non-transmission DTCs first.
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Repair all transmission DTCs.
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Rerun on-board diagnostics to verify repair.
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Carry out Line Pressure Test. See: Transmission Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Line
Pressure Test
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Carry out Stall Speed Test. See: Transmission Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Stall Speed
Test
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Carry out Diagnosis by Symptom Routines. Refer to 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 repairing the torque converter.
Torque Converter Clutch Operation Test
This test verifies that the torque converter clutch control system and the torque converter are operating correctly. Carry out the test as follows:
1. Carry out On-Board Diagnostic Test. See: Transmission Control Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble
Codes/Displaying & Reading Trouble Codes Refer to Computers and Control Systems.
2. Connect a tachometer to the engine.
3. Bring engine to normal operating temperature by driving the vehicle at highway speeds for approximately 15 minutes in (D) position.
4. After normal operating temperatures are reached, maintain a constant vehicle speed of about 80 km/h (50 mph) and tap the brake pedal with the
left foot.
5. Engine rpm should increase when the brake pedal is tapped, and should decrease about 5 seconds after the brake pedal is released. If this does not
occur, refer to Torque Converter Operation Concerns. See: Transmission Control Systems/Testing and Inspection/Symptom Related Diagnostic
Procedures/Diagnostic Routines/Torque Converter Concerns 240/340-242/342 If the vehicle is at a stop and stalls in (D) at idle, move the
transaxle range selector lever to the manual 1 position. Refer to Torque Converter Operation Concerns. See: Transmission Control
Systems/Testing and Inspection/Symptom Related Diagnostic Procedures/Diagnostic Routines/Torque Converter Concerns 240/340-242/342
Refer to Diagnosis By Symptom. See: Transmission Control Systems/Testing and Inspection/Symptom Related Diagnostic Procedures/Diagnostic
Routines Repair as required. If the vehicle does not stall in manual 1, refer to Diagnosis By Symptom.See: Transmission Control Systems/Testing
and Inspection/Symptom Related Diagnostic Procedures/Diagnostic Routines