Powertrain Control Module

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During system operation, PCM transmits electrical reference signals to engine sensors and analyzes return signals to determine engine and A/T operating conditions. If PCM perceives that a sensor, circuit or actuator has failed, it will initiate Failure Mode Effects Management (FMEM) strategy, allowing vehicle to continue to be driven. PCM is located in left rear of engine compartment, near brake master cylinder. The PCM controls malfunction indicator light and communicates with scan tool via data link connector, allowing for PCM to be reprogrammed by flash electrically erasable programmable read only memory.