Toyota Tacoma manuals

Toyota Corolla Repair Manual: System description

The ecm uses the signals from the throttle position sensor, airflow meter and crankshaft position sensor to monitor the engagement condition of the lockup clutch.

Then the ecm compares the engagement condition of the lockup clutch with the lockup schedule in the ecm memory to detect mechanical trouble of the shift solenoid valve sl, valve body and torque converter clutch or automatic transaxle (clutch, brake or gear etc.).

Monitor description

Monitor description

Based on the signals from the throttle position sensor, the airflow meter and the crankshaft position sensor, the ecm sends a signal to the shift solenoid valve sl to regulate the hydraulic pressure and provide smoother gearshifts. The shiftsolenoid valve sl responds to commands from the ecm. The valve controls the lockup relay valve to perform torqueconverter lockup and flexible lockup functions.

The ecm compares the engine rpm (ne) signal and the input speed calculated by output speed sensor (output speed) and gear ratio to detect torque converter lockup. The ecm then compares the lockup status against the lockup schedule in the ecm memory. If the ecm does not detect lockup at the appropriate time, it will conclude that there is a malfunction of shift solenoid sl. The ecm will illuminate the mil.

Monitor strategy

Typical enabling condition

Typical enabling condition

Typical malfunction thresholds

Typical malfunction thresholds

Inspection procedure

Torque converter clutch solenoid performance (shift solenoid valve sl)
Dtc p0741 torque converter clutch solenoid performance (shift solenoid valve sl) ...

Inspection procedure
1 Inspect shift solenoid valve(sl) Remove the shift solenoid valve sl.  measure the resistance according to the value(s) in the table below. Standard: Connect the positive (+ ...

Other materials:

Locking the doors from the outside without a key
1 Move the inside lock button to the lock position. 2 Close the door. ► Vehicles without a smart key system The door cannot be locked if either of the front doors is open and the key is in the engine switch. ► Vehicles with a smart key system The door cannot be locked if the engin ...

Floor shift cable transmission control shift (atm)
Replacement 1. Precaution 2. Disconnect battery negative terminal 3. Remove parking brake hole cover subassy 4. Remove console panel upper 5. Remove console box carpet 6. Remove console box subassy rear 7. Remove air bag sensor assy center 8. Disconnect oxygen sensor connector &n ...

Oxygen / af sensor heater monitor
Preconditions The monitor will not run unless: mil is off  drive pattern  connect the obd ii scan tool to the dlc3 to check monitor status and preconditions.  Start the engine and allow it to idle for 9 minutes.  Drive the vehicle at 25 mph (40 km ...

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