ECM/PCM Inputs and Outputs at Connector A (31P)

Fig 1: Identifying 31-Pin Connector

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NOTE: Standard battery voltage is 12 V.

Fig 2: ECM/PCM Input & Output Pin Voltage Chart (31P, 1 Of 2)

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Fig 3: ECM/PCM Input & Output Pin Voltage Chart (31P, 2 Of 2)

Courtesy of AMERICAN HONDA MOTOR CO., INC.