DIAGNOSTIC FUNCTION
If the pulley ratio, which is calculated according to the primary pulley speed and the secondary pulley speed, exceeds the standard value, the TCM determines that the line pressure is abnormal.
DESCRIPTIONS OF MONITOR METHODS
Pulley ratio is more than 2.981 for 0.2 seconds, or more than 3.781 for 0.1 second, while the vehicle is driven at selector lever position D range.
MONITOR EXECUTION
- Engine speed: More than 450 r/min
- Primary speed: More than 450 r/min
- Acceleration: -0.05G or more
- Voltage of battery: 10 volts or more.
MONITOR EXECUTION CONDITIONS (OTHER MONITOR AND SENSOR)
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)
DTC SET CONDITIONS
Check Conditions
- Voltage of battery: 10 volts or more.
- Transmission range switch position: D.
- Engine speed: 450 r/min or more.
- Primary pulley speed: More than 450 r/min.
- Acceleration: -0.05G or more
Judgment Criteria
- Pulley ratio (primary pulley speed/secondary pulley speed) more than 3.781 for 0.1 second [2 times (Interval 1 second)].
- Pulley ratio (primary pulley speed/secondary pulley speed) more than 2.981 for 0.2 second [2 times (Interval: 1 second)].
OBD-II DRIVE CYCLE PATTERN
The vehicle is driven for at least 10 seconds with the accelerator opening angle at 20% or more.
PROBABLE CAUSES
- Malfunction of valve body assembly (Faulty line pressure solenoid valve)
- Malfunction of the CVT assembly