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Civic Models

  1. Raise and support front of vehicle. Connect voltmeter positive probe into Yellow/Black wire terminal at control box No. 1 connector. Connect negative probe to ground. Start engine.
  2. Select second gear (man. trans.) or position "2" (auto. trans.) and accelerate slowly, while observing voltmeter. Voltage should be battery voltage below 6 MPH and no voltage above 12 MPH. If so, sensor is okay. If not, install a new sensor and retest.
Fig 1: EGR System (Civic 1300 & High Alt. 1500 HF)
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Fig 2: EGR System (Civic 1500 Except HF)
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Fig 3: EGR System (Civic Federal & Calif. 1500 HF)
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Fig 4: EGR System (Civic 4WD Wagon)
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