P0742

DTC P0741 / P0742: Torque Converter Clutch Circuit Performance or Stuck OFF / Stuck ON

DTC Detecting Condition and Trouble Area






DTC Confirmation Procedure

WARNING:

If you do not select a suitable route and take proper precautions when performing a road test, an accident can occur.

- Select a level road with no traffic to minimize the risk of accident.
- Perform the test extremely carefully.
- Perform the road test using 2 persons, a driver and an assistant.

1) Connect scan tool to DLC with ignition switch OFF.
2) Clear DTCs in TCM and ECM memories by using scan tool.
3) Start engine and warm it up to normal operating temperature.
4) Shift select lever to "N" and "D" range for each 10 seconds.
5) Drive vehicle with 4th in "D" range and lock-up ON for 20 seconds or longer referring to "Automatic Gear Shift Table" in Road Test Road Test.
6) Drive vehicle with 2nd or 3rd gear in "D" range, 15 - 20% throttle opening and at vehicle speed of 40 km/h (25 mile/h).
7) Stop vehicle and turn ignition switch OFF.
8) Repeat Step 3) to 6) one time.
9) Stop vehicle.
10) Check DTC, pending DTC and freeze-frame data.

DTC Troubleshooting

1.
Was "A/T System Check" performed?
YES -
Go to Step 2.
NO -
Go to A/T System Check A/T System Check.

2.
Check TCC pressure control solenoid valve for operation referring to Solenoid Valves (Shift Solenoid-A, Shift Solenoid-B, TCC Pressure Control Solenoid and Pressure Control Solenoid) Inspection Solenoid Valves (Shift Solenoid-A, Shift Solenoid-B, TCC Pressure Control Solenoid and Pressure Control Solenoid) Inspection.

Are they in good condition?
YES -
Clean fluid passage or replace valve body assembly.
NO -
Replace TCC pressure control solenoid valve.