Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMITSUBISHI2009LANCER L4-2.4L (4B12)REPAIR AND DIAGNOSISTRANSMISSION AND DRIVETRAINCONTINUOUSLY VARIABLE TRANSMISSION/TRANSAXLETRANSMISSION TEMPERATURE SENSOR/SWITCHTESTING AND INSPECTION
2009 Mitsubishi Lancer L4-2.4L (4B12)
Transmission Temperature Sensor/Switch: Testing and Inspection
2009 Mitsubishi Lancer L4-2.4L (4B12)SECTION Testing and Inspection
TRANSMISSION FLUID TEMPERATURE SENSOR CHECK
1. While pressing A in the figure, turn B counterclockwise to unlock the CVT assembly connector, and disconnect the connector.
2. Measure the resistance between the sensor-side connector terminal No. 17 of the CVT assembly connector and ground (terminal No.19).
Standard value:
NOTE: In the information screen on the multi-information display, the fluid temperature warning comes on when the transmission fluid temperature is approximately 140° C (284° F) or higher, and automatically goes out when the transmission fluid temperature dropped below approximately 137° C (279° F).
CAUTION:
The transmission fluid temperature sensor cannot be removed or replaced as a single unit. When the transmission fluid temperature sensor needs to be replaced, replace the valve body assembly.
3. When the resistance of the transmission fluid temperature sensor is outside the standard value, and the fluid temperature warning comes on/goes out at other than the specified temperatures, replace the valve body assembly and the harness.
1. While pressing A in the figure, turn B counterclockwise to unlock the CVT assembly connector, and disconnect the connector.
2. Measure the resistance between the sensor-side connector terminal No. 17 of the CVT assembly connector and ground (terminal No.19).
Standard value:
NOTE: In the information screen on the multi-information display, the fluid temperature warning comes on when the transmission fluid temperature is approximately 140° C (284° F) or higher, and automatically goes out when the transmission fluid temperature dropped below approximately 137° C (279° F).
CAUTION:
The transmission fluid temperature sensor cannot be removed or replaced as a single unit. When the transmission fluid temperature sensor needs to be replaced, replace the valve body assembly.
3. When the resistance of the transmission fluid temperature sensor is outside the standard value, and the fluid temperature warning comes on/goes out at other than the specified temperatures, replace the valve body assembly and the harness.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.