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 MANUALSMITSUBISHI2004LANCER L4-2.4L SOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSAIR TEMPERATURE SENSOR ( AMBIENT / INTAKE )TESTING AND INSPECTION
2004 Mitsubishi Lancer L4-2.4L SOHC
Air Temperature Sensor ( Ambient / Intake ): Testing and Inspection
2004 Mitsubishi Lancer L4-2.4L SOHCSECTION Testing and Inspection
INTAKE AIR TEMPERATURE SENSOR CHECK
1. Disconnect the mass airflow sensor connectors.
2. Measure resistance between terminal No. 1 and No. 4.
Standard value:
13 - 17 kOhms [at -20 °C (-4 °F)]
5.3 - 6.7 kOhms [at 0 °C (32 °F)]
2.3 - 3.0 kOhms [at 20 °C (68 °F)]
1.0 - 1.5 kOhms [at 40 °C (104 °F)]
0.56 - 0.76 kOhms [at 60 °C (140 °F)]
0.30 - 0.45 kOhms [at 80 °C (176 °F)]
3. If not within specifications, replace the mass airflow sensor.
4. Measure resistance while heating the sensor using a hair dryer.
5. If resistance does not decrease as heat increases, replace the mass airflow sensor.
1. Disconnect the mass airflow sensor connectors.
2. Measure resistance between terminal No. 1 and No. 4.
Standard value:
13 - 17 kOhms [at -20 °C (-4 °F)]
5.3 - 6.7 kOhms [at 0 °C (32 °F)]
2.3 - 3.0 kOhms [at 20 °C (68 °F)]
1.0 - 1.5 kOhms [at 40 °C (104 °F)]
0.56 - 0.76 kOhms [at 60 °C (140 °F)]
0.30 - 0.45 kOhms [at 80 °C (176 °F)]
3. If not within specifications, replace the mass airflow sensor.
4. Measure resistance while heating the sensor using a hair dryer.
5. If resistance does not decrease as heat increases, replace the mass airflow sensor.
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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.