Celica 2WD L4-2.0L (3S-FE) (1988)
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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.
