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AFR Sensor Simulator To verify accurate operation of the electronics of any of ECM's air-fuel ratio (AFR) analyzers and modules, ECM offers its AFR Sensor Simulator. The AFR Sensor Simulator is connected to the analyzer in place of the AFR sensor. The simulator tests the analyzers' sensor heater control circuit and the analyzer's AFR calculation hardware and software. The simulator is a calibrated device that can be returned to ECM for scheduled calibration verification.
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