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CPC Pressure Sensor: Inspection
- Check that the CPC pressure sensor has no deformation, cracks or other damages.
- Connect the dry-cell battery positive terminal to terminal No. 3 and the dry-cell battery negative terminal to terminal No. 1, and connect the circuit tester positive terminal to terminal No. 2 and the circuit tester negative terminal to terminal No. 1.
NOTE:
- Use new dry-cell batteries.
- Using a circuit tester, check that the initial voltage of each dry-cell battery is 1.6 V or more. And also check that the voltage of three batteries in series is between 4.8 - 5.2 V.
- For power supply, 5 V DC constant voltage power source can also be used.
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- Check the voltage at a normal atmospheric pressure.
NOTE:
The atmospheric pressure at higher altitude is lower than normal. Therefore, the voltage is lower than the standard value.
| Terminal No. |
Standard |
| 2 (+) - 1 (-) |
Approx. 3.6 V (when 25°C (77°F)) |
- Connect the Mighty Vac to the pressure port (A) of CPC pressure sensor.
 Courtesy of SUBARU OF AMERICA, INC.
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- Check the voltage when generating vacuum using Mighty Vac.
CAUTION:
Do not apply a vacuum that exceeds -50 kPa (-0.5 kg/cm2
, -7.2 psi). Doing so may damage the CPC pressure sensor.
NOTE:
When vacuum occurs at the pressure port of CPC pressure sensor, the voltage will drop from the value as in step 3.
| Pressure |
Terminal No. |
Standard |
| -50 kPa (-0.5 kg/cm2
, -7.2 psi) |
2 (+) - 1 (-) |
Approx. 2 V (when 25°C (77°F)) |