DIAGNOSTIC FUNCTION
TCM conducts fault detection by measuring the difference between the target value and the actual value for the primary pressure.
DESCRIPTIONS OF MONITOR METHODS
The following three conditions are met for 10 seconds.
- The engine is running.
- Selector lever position: Other than P, N
- The temperature, which the transmission fluid temperature sensor detects, is higher than -20°C (-4°C).
- Difference between the target primary pressure and actual primary pressure is 1.2 MPa (174 psi) or more.
MONITOR EXECUTION
- 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-Output Functional High)
LOGIC FLOW CHARTS (Monitor Sequence-Output Functional Low)
DTC SET CONDITIONS
Check Conditions <Output Functional High>
- Voltage of battery: 10 volts or more.
- Transmission range switch position: D or R.
Check Conditions <Output Functional Low>
- Voltage of battery: 10 volts or more.
- Transmission range switch position: D or R.
- Engine speed: 450 r/min or more.
- Time since following conditions are approved: More than 1 second.
- Target primary pressure: More than 2 MPa (290 psi).
- Actual primary pressure: 0.4 MPa (58 psi) or less.
Judgment Criteria <Output Functional High>
- Actual primary pressure - Target primary pressure: More than 1.2 MPa (174 psi) (15 seconds).
Judgment Criteria <Output Functional Low>
- Target primary pressure - Actual primary pressure: More than 1.2 MPa (174 psi) (10 seconds).
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 primary pressure solenoid valve)
- Malfunction of the CVT assembly