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Short circuit

CMP signal circuit (CMP sensor connector terminal B and PCM connector terminal 3V to GND)
Power circuit (CMP sensor connector terminal A and main relay terminal D through common connector to GND)

3. Reconnect the CMP sensor connector.
4. Inspect the protrusion of camshaft (intake side) for damage and cracks.

Fig 1: Identifying CMP Sensor Connector Terminal
Courtesy of MAZDA MOTORS CORP.