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Function Explanation (DTC Detection Outline)

During a collision, the SAS control module sends a collision signal to the PCM via the CAN signal. The PCM records a DTC by receiving a collision signal.
This DTC does not indicate a part malfunction. It indicates operation of fail-safe from safety assurance during a vehicle collision.

Fig 1: SAS Control Module And PCM Collision Signal Diagram

Courtesy of MAZDA MOTORS CORP.