Tracker 4WD L4-1.6L VIN 6 (1998)
Oxygen Sensor: Testing and Inspection
Oxygen Sensor Diagnosis
Diagnose the Fuel Control Heated Oxygen Sensor (HO2S 1) is diagnosed for the following conditions:
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A Slow Response.
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An Inactive Signal (output steady at bias voltage-approx. 450 mV).
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A Signal Fixed High.
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A Signal Fixed Low.
Diagnose the Catalyst Monitor Heated Oxygen Sensor (HO2S 2) is diagnosed for the following functions:
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The Heater Performance (time to activity on cold start)
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A Signal fixed low during steady state conditions or power enrichment (hard acceleration when a rich mixture should be indicated).
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A Signal fixed high during steady state conditions or decel fuel mode (deceleration when a lean mixture should be indicated).
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An Inactive Sensor.
For further Oxygen Sensor testing and diagnostic charts, refer to Computers and Control Systems / Testing and Inspection. See: Testing and
Inspection
