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TM-182 < COMPONENT DIAGNOSIS > [5AT: RE5R05A] P0740 TORQUE CONVERTER P0740 TORQUE CONVERTER Description INFOID:0000000005274063 • The torque converter clutch solenoid valve is activated, with the gear in D 4 , D 5 by the TCM in response to signals sent from the output speed sensor and accelerator pedal position sensor (throttle position sensor). • Lock-up operation, however, is prohibited when A/T fluid temperature is too low. change abruptly. If there is a big jump in engine speed, there is no lock-up. CONSULT-III Reference Value in Data Monitor Mode INFOID:0000000005274064 On Board Diagnosis Logic INFOID:0000000005274065 • This is an OBD-II self-diagnostic item. under the following conditions. - When TCM detects an improper voltage drop when it tries to operate the solenoid valve. Possible Cause INFOID:0000000005274066 • Torque converter clutch solenoid valve (The solenoid circuit is open or shorted.) DTC Confirmation Procedure INFOID:0000000005274067 CAUTION: Always drive vehicle at a safe speed. WITH CONSULT-III 1. Turn ignition switch “ON”. (Do not start engine.) 2. Select “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III. 3. Start engine and maintain the following conditions for at least 5 consecutive seconds. 4. If DTC is detected go to WITH GST Follow the procedure “WITH CONSULT-III”. Diagnosis Procedure INFOID:0000000005274068 1. CHECK INPUT SIGNAL With CONSULT-III 1. Turn ignition switch ON. 2. Select “MAIN SIGNALS” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III. 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 |