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Home › Subaru › 2016 › Forester 2.5i, Eng CD FB25BA, Standard Trans › Repair and Diagnosis › Engine Performance › Engine Control Systems › Fuel Injection (Fuel Systems) (H4DO) › Tumble Generator Valve Assembly › Inspection › Check Sensors

Check Sensors

  1. Connect dry-cell battery positive terminal to terminal No. 3 and dry-cell battery ground terminal to terminal No. 2, and connect the resistance (0.5 - 2 kΩ) between dry-cell battery positive terminal and 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.
  2. Connect the circuit tester positive terminal to terminal No. 1, and the circuit tester ground terminal to terminal No. 2.
  3. Connect the battery positive terminal to terminal No. 5 and the battery ground terminal to terminal No. 4, and measure the voltages with the valve fully opened on LH side and with the valve fully closed on RH side.
    CAUTION: Do not power the motor for more than 10 seconds.
    Fig 1: Connecting Circuit Tester Positive Terminal To Terminal No. 1
    G10402833Courtesy of SUBARU OF AMERICA, INC.
    Terminal No. Standard
    1 (+) and 2 (-) LH side: Approx. 5 V (when 25°C (77°F)) RH side: Approx. 0 - 0.5 V (when 25°C (77°F))
  4. Connect dry-cell battery positive terminal to terminal No. 3 and dry-cell battery ground terminal to terminal No. 2, and connect the resistance (0.5 - 2 kΩ) between dry-cell battery positive terminal and 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.
  5. Connect the circuit tester positive terminal to terminal No. 1, and the circuit tester ground terminal to terminal No. 2.
  6. Connect the battery positive terminal to terminal No. 4 and the battery ground terminal to terminal No. 5, and measure the voltages with the valve fully closed on LH side and with the valve fully opened on RH side.
CAUTION: Do not power the motor for more than 10 seconds.
Fig 2: Connecting Circuit Tester Positive Terminal To Terminal No. 1
G10402834Courtesy of SUBARU OF AMERICA, INC.
Terminal No. Standard
1 (+) and 2 (-) LH side: Approx. 0 - 0.5 V (when 25°C (77°F)) RH side: Approx. 5 V (when 25°C (77°F))
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