Connect the Honda Diagnostic System (HDS) to the data link connector (DLC).

Turn the ignition switch to ON (II).

Make sure the HDS communicates with the vehicle and the engine control module (ECM)/powertrain control module (PCM). If it doesn't, troubleshoot the DLC circuit.

Check for DTCs. If a DTC is present, diagnose, and repair the cause before continuing with this test.

Turn the ignition switch to ON (II), select PGM-FI, and check the OIL PRESSURE SWITCH in the DATA LIST with the HDS.

Turn the ignition switch to LOCK (0).

Check the oil pressure switch.

Turn the ignition switch to ON (II), and jump the SCS line with the HDS, then turn the ignition switch to LOCK (0).

NOTE: This step must be done to protect the ECM/PCM from damage.

Disconnect ECM/PCM connector B (49P) and the oil pressure switch connector.

Check for continuity between ECM/PCM connector terminal B7 and the oil pressure switch connector.