DIAGNOSTIC FUNCTION
TCM detects malfunction of engine speed received from the ECM by comparing the primary pulley speed with the secondary pulley speed.
DESCRIPTIONS OF MONITOR METHODS
- Primary pulley speed of 1,000 r/min or more and with the engine speed of 450 r/min or less
- When the differences in rotation between the engine and the primary pulley, and between the engine and the secondary pulley are 1,000r/min or more during direct-coupled operating
- CAN communication error occurs between ECM and TCM.
MONITOR EXECUTION
- transmission range: D
- Throttle valve opening: 1/8 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)
- P0705: Malfunction of transmission range switch
- P0712, P0713: Malfunction of the transmission fluid temperature sensor
- P0715: Malfunction of primary pulley speed sensor
- P0740: Abnormality in lockup function
- P0745: Malfunction of line pressure solenoid valve
- P0840: Malfunction of secondary pressure sensor
- P1777: Malfunction of stepper motor
- U0001: Malfunction of CAN communication circuit
Sensor (The sensor below is determined to be normal)
- Transmission range switch
- Transmission fluid temperature sensor
- Primary pulley speed sensor
- Secondary pressure sensor
LOGIC FLOW CHARTS (Monitor Sequence-Input Rationality-Low)
LOGIC FLOW CHARTS (Monitor Sequence-Input Rationality-High)
DTC SET CONDITIONS
Check Conditions
- Transmission range switch position: D.
- Throttle position sensor voltage: 1.37 volts or more.
- Primary pulley speed: 1,000 r/min or more.
- The absolute value of the Primary pulley speed - secondary pulley speed: 1,000 r/min or less.
- Voltage of battery: 9 volts or more.
- Voltage of battery: 16 volts or less.
Judgment Criteria
- Engine revolution [primary pulley speed: 1,000 r/min or more]: less than 450 r/min.
- The difference of engine speed and primary speed: more than 1,000 r/min. (5 seconds)
- The difference of engine speed and secondary 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 the CAN bus
- Malfunction of the engine system
- Malfunction of TCM