Install the special tools as shown. Reconnect ECM/PCM connector B (24P) and the VTEC solenoid valve 1P (2P)* connector. Connect a tachometer. Start the engine. Hold the engine at 3.000 rpm with no load (in Park or neutral) until the radiator fan comes on.

Check oil pressure at engine speeds of 1,000 and 2,000 rpm. Keep measuring time as short as possible because the engine is running with no load (less than 1 minute). Is pressure below 49 kPa (0.5 kgf/cm2, 7 psi)? YES - Go to step 19. NO - Inspect the VTEC solenoid valve (see page 11-277). Turn the ignition switch OFF. Disconnect the VTEC solenoid valve 1P (2P)* connector. Attach the battery positive terminal to the VTEC solenoid 1P (2P)* valve terminal No. 1. Start the engine, and check oil pressure at an engine speed of 3,000 rpm. Is pressure above 390 kPa (4.0 kgf/cm2, 57 psi)? YES - Substitute a known-good ECM/PCM and recheck. If symptom/indication goes away, replace the original ECM/PCM. NO - Inspect the VTEC solenoid valve (see page 11-277).