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Mazda
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2012
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CX-7 i Touring, 2.5L Eng VIN 5
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Repair and Diagnosis
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Engine Performance
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Engine Control Systems
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Engine Control System [2.5L L5]
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Pcm Inspection
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Inspection Using An Oscilloscope (Reference)
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A/F sensor heater control
A/F sensor heater control
Fig 1: A/F Sensor Heater Control Voltage Graph
PCM terminals
2A(+)-body ground(-)
Oscilloscope setting
5 V/DIV (Y), 200 ms/DIV (X), DC range
Vehicle condition
Idle (immediately after starting the engine)