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.
Component Inspection
- CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
- Turn ignition switch OFF.
- Remove EVAP control system pressure sensor with its harness connector.
Always replace O-ring with a new one.
- Install a vacuum pump to EVAP control system pressure sensor.
- Turn ignition switch ON and check output voltage between ECM harness connector terminals under the following conditions.
ECM
Condition
[Applied vacuum kPa (kg/cm 2 , psi)]
Voltage (V)
Connector
+
-
Terminal
Terminal
E20
121
148
Not applied
1.8 - 4.8
-26.7 (-0.272, -3.87)
2.1 to 2.5 lower than above value
CAUTION:- Always calibrate the vacuum pump gauge when using it.
- Never apply below -93.3 kPa (-0.952 kg/cm 2 , -13.53 psi) or pressure over 101.3 kPa (1.033 kg/cm 2 , 14.69 psi).
Is the inspection result normal?
YES
INSPECTION END
NO
Replace EVAP control system pressure 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.
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