DIAGNOSTIC FUNCTION
The TCM determines whether the system is defective by monitoring the secondary pulley speed sensor.
DESCRIPTIONS OF MONITOR METHODS
- The status with the primary pulley speed of 1,000 r/min or more and with the secondary pulley speed of less than 150 r/min continues for 5 seconds.
- 0.5 seconds after the secondary pulley speed has dropped abruptly from 1,000 r/min or more to 215 r/min or less.
- The pulley ratio is out of specifications when the engine speed, the primary pulley speed and the turbine speed are normal.
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)
- P0703: Malfunction of stoplight switch
- P0705: Malfunction of transmission range switch
- P0712, P0713: Malfunction of the transmission fluid temperature sensor
- P0715: Malfunction of primary pulley speed sensor
- P0730: Incorrect gear ratio
- P084A: Abnormality in primary pressure sensor function
- P0966, P0967: Malfunction of secondary pressure solenoid valve
- P2720, P2721: Malfunction of select pressure solenoid valve
- P2763, P2764: Malfunction of lock-up solenoid valve
- P2765: Malfunction of turbine speed sensor
Sensor (The sensor below is determined to be normal)
- Transmission fluid temperature sensor
- Primary 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.
- Primary pulley speed: 1,000 r/min or more.
Check Conditions <Input Open Circuit>
- Voltage of battery: 10 volts or more.
- Secondary 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.
- Engine speed - Primary pulley speed: 1,000 r/min or less.
- Turbine speed - Engine speed: 1,000 r/min or less.
- Turbine speed - Primary pulley speed: 1,000 r/min or less.
- Torque converter clutch status: Engaged.
Judgment Criteria <Input Rationality-Low (Open/Low revolution)>
- Secondary pulley speed [Primary pulley speed: 1,000 r/min or more]: Less than 150 r/min. (5 seconds)
Judgment Criteria <Input Open Circuit>
- Secondary pulley speed [Secondary pulley speed at 10 millisecond before: 1,000 r/min or more]: 215 r/min or less. (0.5 second)
Judgment Criteria <Input Other Rationality>
- Primary pulley speed / Secondary pulley speed: More than 2.9. (5 seconds)
- Primary pulley speed / Secondary pulley speed: Less than 0.3. (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 secondary pulley speed sensor
- Damaged wiring harness and connectors
- Malfunction of TCM