DIAGNOSTIC FUNCTION
The TCM determines whether the system is defective by monitoring the primary pulley speed sensor.
DESCRIPTIONS OF MONITOR METHODS
- The status with the secondary pulley speed of 500 r/min or more and with the primary pulley speed of less than 150 r/min continues for 5 seconds.
- 0.5 seconds after the primary pulley speed has dropped abruptly from 1,000 r/min or more to 200 r/min or less
- Primary pulley speed is found abnormal by comparing the engine speed and the turbine speed.
MONITOR EXECUTION
- Transmission range: D
- Engine speed: 450 r/min 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)
- P0720: Malfunction of secondary pulley speed sensor
- P0730: Incorrect gear ratio
- P084A: Abnormality in primary pressure sensor function
- P2720, P2721: Malfunction of select pressure solenoid valve
- P2765: Malfunction of turbine speed sensor
Sensor (The sensor below is determined to be normal)
- Secondary pulley speed sensor
- Primary pressure sensor
- Turbine speed sensor
LOGIC FLOW CHARTS (Monitor Sequence-Input Rationality-Low (Open/Low revolution))
LOGIC FLOW CHARTS (Monitor Sequence-Input Open Circuit)
LOGIC FLOW CHARTS (Monitor Sequence-Input Other Rationality)
DTC SET CONDITIONS
Check Conditions <Input Rationality-Low (Open/Low revolution)>
- Voltage of battery: 10 volts or more.
- Secondary pulley speed: 500 r/min or more.
Check Conditions <Input Open Circuit>
- Voltage of battery: 10 volts or more.
- Primary pulley speed at 10 millisecond before: 1,000 r/min or more.
Check Conditions <Input Other Rationality>
- Voltage of battery: 10 volts or more.
- Transmission range switch position: D.
- Engine speed: 450 r/min or more.
- Primary pulley speed: 300 r/min or more.
- Secondary pulley speed: 300 r/min or more.
- Turbine speed: 300 r/min or more.
- Turbine speed - Engine speed: 1,000 r/min or less.
- Torque converter clutch status: Engaged.
Judgment Criteria <Input Rationality-Low (Open/Low revolution)>
- Primary pulley speed [Secondary pulley speed: 500 r/min or more]: Less than 150 r/min. (5 seconds)
Judgment Criteria <Input Open Circuit>
- Primary pulley speed [Primary pulley speed at 10 millisecond before: 1,000 r/min or more]: 200 r/min or less. (0.5 second)
Judgment Criteria <Input Other Rationality>
- Engine speed - Primary pulley speed: More than 1,000 r/min. (5 seconds)
- Turbine speed - Primary pulley speed: More than 1,000 r/min. (5 seconds)
OBD-II DRIVE CYCLE PATTERN
Transmission range: D (Drive the vehicle for 10 seconds or more while the accelerator opening angle is 20% or more)
PROBABLE CAUSES
- Malfunction of primary pulley speed sensor
- Damaged wiring harness and connectors
- Malfunction of TCM