Alternator Fr Signal

This signals the PGM-FI ECU when the alternator is charging. See Fig 1 and Fig 2 .

Fig 1: Alternator FR Signal Diagnostic Flow Chart (1 Of 2)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 2: Alternator FR Signal Diagnostic Flow Chart (2 Of 2)

Courtesy of AMERICAN HONDA MOTOR CO., INC.