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Home >> Acura >> 2004 >> NSX 3.2 NA2 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing >> Modules, Motors, Relays & Solenoids >> PGM-FI Main Relay

PGM-FI Main Relay

NOTE: If the car starts and continues to run, the PGM-FI main relay is okay.
  1. Remove the PGM-FI main relay. Relay is located behind passenger seat. See Figure .
  2. Connect battery voltage to PGM-FI main relay. Attach battery positive to the relay 8-pin connector terminal No. 3 and battery negative to the relay 8-pin connector terminal No. 2. Check for continuity between PGM-FI main relay terminals. Check between the relay 8-pin connector terminal No. 5 and relay 4-pin connector terminal No. 2. See Fig 1 . If there is continuity, go 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.
    Fig 2: Identifying PGM-FI Main Relay Connector Terminals
    G00107040Courtesy of AMERICAN HONDA MOTOR CO., INC.
  3. Connect battery voltage to PGM-FI main relay. Attach battery positive to the relay 4-pin connector terminal No. 4 and battery negative to the relay 8-pin connector terminal No. 7. Check for continuity between PGM-FI main relay terminals. Check between the relay 4-pin connector terminal No. 3 and relay 4-pin connector terminal No. 1. If there is continuity, go to next step. If there is no continuity, replace the relay and retest.
  4. Connect battery voltage to PGM-FI main relay. Attach battery positive to the relay 4-pin connector terminal No. 1 and battery negative to the relay 8-pin connector terminal No. 2. Check for continuity between PGM-FI main relay terminals. Check between the relay 8-pin connector terminal No. 5 and relay 4-pin connector terminal No. 2. If there is no continuity, replace the relay and retest. If there is continuity, the relay is okay. For additional testing if the fuel pump still does not work, follow the procedure in the flow charts. See Fig 3 -Fig 5 .
Fig 3: PGM-FI Main Relay Diagnostic Flow Chart (1 Of 3)
G00107042Courtesy of AMERICAN HONDA MOTOR CO., INC.
Fig 4: PGM-FI Main Relay Diagnostic Flow Chart (2 Of 3)
G00107059Courtesy of AMERICAN HONDA MOTOR CO., INC.
Fig 5: PGM-FI Main Relay Diagnostic Flow Chart (3 Of 3)
G00107058Courtesy of AMERICAN HONDA MOTOR CO., INC.
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