Relay Testing

WARNING: This page is about a different car, the 2001 Acura NSX-T, 2001 Acura NSX, 2000 Acura NSX-T, and 2000 Acura NSX. However, it is still accessible from the selected car via links, so may be relevant.

Remove the PGM-FI main relay. Relay is located behind passenger seat. See Fig 1 .

Fig 1: Locating PGM-FI Components (Passenger & Luggage Compartment)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
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 2 . If there is continuity, go to next step. If there is no continuity, replace the relay and retest.

Fig 2: Identifying PGM-FI Main Relay Circuits & Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.
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 to next step. If there is no continuity, replace the relay and retest.
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. 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)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 4: PGM-FI Main Relay Diagnostic Flow Chart (2 Of 3)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 5: PGM-FI Main Relay Diagnostic Flow Chart (3 Of 3)

Courtesy of AMERICAN HONDA MOTOR CO., INC.