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TM-232 < COMPONENT DIAGNOSIS > [CVT: RE0F10A] P0744 A/T TCC S/V FUNCTION (LOCK -UP) P0744 A/T TCC S/V FUNCTION (LOCK -UP) Description INFOID:0000000003806410 This malfunction is detected when the torque converter clutch does not lock-up as instructed by the TCM. This DTC Logic INFOID:0000000003806411 DTC DETECTION LOGIC DTC CONFIRMATION PROCEDURE CAUTION: Always drive vehicle at a safe speed. 1. CHECK DTC DETECTION With CONSULT-III 1. Turn ignition switch ON. 2. Select “Data Monitor” mode for “TRANSMISSION”. 3. Start engine and maintain the following condition for at least 30 seconds. With GST Follow the procedure “With CONSULT-III”. YES >> Go to NO >> Check intermittent incident. Refer to GI-35, "Intermittent Incident" . Diagnosis Procedure INFOID:0000000003806412 1. CHECK LINE PRESSURE Perform line pressure test. Refer to TM-308, "Inspection and Judgment" . Is the inspection result normal? YES >> GO TO 2. NO >> Repair or replace damaged parts. Refer to TM-308, "Inspection and Judgment" . 2. CHECK TORQUE CONVERTER CLUTCH SOLENOID VALVE 1. Turn ignition switch OFF. 2. Disconnect CVT unit connector. DTC Item (CONSULT-III screen term) Malfunction is detected when... Possible cause P0744 A/T TCC S/V FNCTN • CVT cannot perform lock-up even if electrical circuit is • TCM detects as irregular by comparing reference value • There is a big difference be- tween engine speed and pri- • Torque converter clutch sole- noid valve • Hydraulic control circuit ACC PEDAL OPEN : More than 1.0/8 RANGE : “D” position VEHICLE SPEED : Constant speed of more than 40 km/h (25 MPH) |