|
|
P0744 TORQUE CONVERTER TM-75 < DTC/CIRCUIT DIAGNOSIS > C E F G H I J K L M A B TM N O P P0744 TORQUE CONVERTER Description INFOID:0000000009885779 This malfunction is detected when the A/T does not lock-up. This is not only caused by electrical malfunction (circuits open or shorted) but also by mechanical malfunction such as control valve sticking, improper solenoid valve operation, etc. CONSULT Reference Value in Data Monitor Mode INFOID:0000000009885780 On Board Diagnosis Logic INFOID:0000000009885781 • This is an OBD-II self-diagnostic item. • Diagnostic trouble code “P0744” with CONSULT or 3rd judgment flicker without CONSULT is detected under the following conditions. - When A/T cannot perform lock-up even if electrical circuit is good. - When TCM detects as irregular by comparing difference value with slip rotation. Possible Cause INFOID:0000000009885782 • Harness or connectors (The solenoid circuit is open or shorted.) • Torque converter clutch solenoid valve • Hydraulic control circuit DTC Confirmation Procedure INFOID:0000000009885783 CAUTION: Always drive vehicle at a safe speed. NOTE: If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch “OFF” and wait at least 10 seconds before performing the next test. After the repair, perform the following procedure to confirm the malfunction is eliminated. WITH CONSULT 1. Start engine. 2. Select “DATA MONITOR" mode for "TRANSMISSION" with CONSULT. 3. Drive vehicle and maintain the following conditions for at least 30 consecutive seconds. ACCELE POSI: More than 1.0/8 SLCT LVR POSI: “D” position TCC SOLENOID: 0.4 - 0.6 A VEHICLE SPEED: 80 km/h (50 MPH) or more Driving locations: Driving the vehicle uphill (increased engine load) will help maintain the driving conditions required for this test. 4. If DTC is detected, go to WITH GST Follow the procedure “With CONSULT”. Diagnosis Procedure INFOID:0000000009885784 1. CHECK INPUT SIGNAL With CONSULT 1. Turn ignition switch “ON”. 2. Select “MAIN SIGNALS” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT. 3. Start the engine. Item name Condition Display value (Approx.) TCC SOLENOID When performing slip lock-up 0.2 - 0.4 A When performing lock-up 0.4 - 0.6 A |