Tribute ES 4WD V6-3.0L DOHC (2002)
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.
2. Know and Understand the Customers Concern.
3. Verify the Concern-Carry out the Torque Converter Operation Test.
4. Carry out Diagnostic Procedures.
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Carry out 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 diagnostics to verify repair.
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Carry out Line Pressure Test.
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Carry out Stall Speed Test.
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Carry out Diagnosis by Symptom 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.
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 five seconds after the brake pedal is released. If this does
not occur, see torque converter operation concerns. If the vehicle is at a stop and stalls in D at idle, move the transaxle range selector lever to the
manual 1 position, see torque converter operation concerns. Repair as required. If the vehicle does not stall in manual 1, refer to AUTOMATIC
TRANSAXLE TROUBLESHOOTING INDEX.
