DESCRIPTIONS OF MONITOR METHODS <P0741>
When the input shaft speed sensor is normal, the engine speed signal is normal, and within the lock-up operation range, the slip speed of the torque converter exceeds the specified value.
MONITOR EXECUTION <P0741>
- Driving with the lock-up activated
MONITOR EXECUTION CONDITIONS (OTHER MONITOR AND SENSOR) <P0741>
Other Monitor (There is no temporary DTC stored in memory for the item monitored below)
Sensor (The sensor below is determined to be normal)
LOGIC FLOW CHARTS (Monitor Sequence) <P0741>
DTC SET CONDITIONS <P0741>
Check Conditions
- Lock-up status: engaging.
Judgment Criteria
- Engine speed - Input shaft speed: (40 + 0.035 × output shaft speed>)/2 or more. (30 seconds)
OBD-II DRIVE CYCLE PATTERN <P0741>
Driving at 55 km/h (34.2 mph) or more with the shift ranges of 3rd, 4th, 5th, and 6th gear. Maintain each shift range for 30 second or more.
DESCRIPTIONS OF MONITOR METHODS <P0742>
When the input shaft speed sensor and the output shaft speed sensor are normal at the "D" range, the engine speed signal is normal, and within the non-lock-up operation range, the extremely low slip speed of the torque converter is detected continuously for a specified time.
MONITOR EXECUTION <P0742>
- Driving with the lock-up activated
MONITOR EXECUTION CONDITIONS (OTHER MONITOR AND SENSOR) <P0742>
Other Monitor (There is no temporary DTC stored in memory for the item monitored below)
Sensor (The sensor below is determined to be normal)
LOGIC FLOW CHARTS (Monitor Sequence) <P0742>
DTC SET CONDITIONS <P0742>
Check Conditions
- Output speed: more than 1,000 r/min.
- Lock-up status: Disengaging.
- Accelerator pedal position sensor opening: 3/8 or more
Judgment Criteria
- Calculated slip (Engine speed - Input shaft speed): 5 r/min or less. (5 seconds)
OBD-II DRIVE CYCLE PATTERN <P0742>
Driving at 55 km/h (34.2 mph) or less with the shift range of 3rd and 4th gear. Driving at 48 ± 2 km/h (29.8 ± 1.2 mph) with the 5th gear. Maintain each shift range for 1 second or more.
PROBABLE CAUSES
- When the DTC P0712, P0713: transmission fluid temperature sensor system is stored
- Malfunction of the P2763, P2764: Lock-up and Low-reverse brake linear solenoid valve system
- Poor installation of the engine and A/T (deviation to the axial direction)
- Malfunction of the torque converter
- Malfunction of the valve body assembly