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PGM-FI Main Relay

NOTE: If the car starts and continues to run, the main relay is OK.
  1. Remove the PGM-FI main relay. PGM-FI main relay is behind passenger seat. See Figure .
  2. Attach the battery positive terminal to the No. 3 terminal and the battery negative terminal to the No. 2 terminal of the PGM-FI main relay. Then check for continuity between the No. 5 terminal and No. 2 terminal of the PGM-FI main relay. See Fig 1 . If there is continuity, go on to next step. If there is no continuity, replace the relay and retest.
    Fig 1: Identifying PGM-FI Main Relay Circuits & Terminals
    G00107041Courtesy of AMERICAN HONDA MOTOR CO., INC.
  3. Attach the battery positive terminal to the No. 4 terminal and the battery negative terminal to the No. 7 terminal of the PGM-FI main relay. Then check that there is continuity between the No. 3 terminal and No. 1 terminal of the PGM-FI main relay. If there is continuity, go on to next step. If there is no continuity, replace the relay and retest.
  4. Attach the battery positive terminal to the No. 1 terminal and battery negative terminal to the No. 2 terminal of the PGM-FI main relay. Then check that there is continuity between the No. 5 terminal and No. 2 terminal of the PGM-FI main relay. If there is no continuity, replace the relay and retest. If there is continuity, the relay is okay. If the fuel pump still does not work, test the PGM-FI main relay circuit according to the flow charts. See Fig 2 - Fig 4 .
Fig 2: PGM-FI Main Relay Diagnostic Flow Chart (1 Of 3)
G00107042Courtesy of AMERICAN HONDA MOTOR CO., INC.
Fig 3: PGM-FI Main Relay Diagnostic Flow Chart (2 Of 3)
G00107043Courtesy of AMERICAN HONDA MOTOR CO., INC.
Fig 4: PGM-FI Main Relay Diagnostic Flow Chart (3 Of 3)
G00107045Courtesy of AMERICAN HONDA MOTOR CO., INC.
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