Manuals through 2025 now available!
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LEMON is the spiritual successor to CHARM, I recommend you try it!
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Oxygen Sensor: Testing and Inspection
INSPECTION OF OXYGEN SENSOR 1. WARM UP ENGINE. Allow the engine to reach normal operating temperature.
2. INSPECT FEEDBACK VOLTAGE (VF). Connect the positive (+) probe of a voltmeter to terminal VF of the check connector, and negative (-) probe to terminal E1.
Perform the test as shown in flow charts.
