DIAGNOSTIC FUNCTION
TCM conducts fault detection by monitoring the terminal voltage of the transmission fluid temperature sensor.
DESCRIPTIONS OF MONITOR METHODS
- Field A: Transmission fluid temperature is less than -20°C (-4°F)
Field B: Transmission fluid temperature is -20°C (-4°F) or more and less than 0°C (32°F)
Field C: Transmission fluid temperature is 0°C (32°F) or more and less than 20°C (68°F)
When the transmission fluid temperature is kept at one of fields A, B and C above for 10 minutes.
MONITOR EXECUTION
- Transmission range: D
- Vehicle speed: 10 km (6.2 mph) or more
- Throttle valve opening: 1/8 or more
- Engine speed: 450 r/min 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
- Transmission fluid temperature: Less than 20°C (68°F)
- Transmission range switch position: D.
- Vehicle speed: 32 km/h (20 mph) or more.
- Throttle position sensor voltage: 1.37 V or more.
- Engine speed: 450 r/min or more.
Judgment Criteria
- The transmission fluid temperature does not rise to 20°C (68°F) within the specified period (300 - 800 seconds) after the engine is started.
OBD-II DRIVE CYCLE PATTERN
Transmission range: D (Drive the vehicle for 20 seconds or more while the accelerator opening angle is 20% or more)
PROBABLE CAUSES
- Malfunction of transmission fluid temperature sensor
- Malfunction of transmission fluid cooler piping and oil pump
- Malfunction of TCM
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