Measure voltage between ECM connector terminal B9 and body ground. ECM CONNECTOR B (24P) Wire side of female terminals Is there battery voltage? YES - Repair open in the wire between the VTEC oil pressure switch and ECM (B9). NO - Go to step 11. Turn the ignition switch OFF. Disconnect ECM connector B (24P). Check for continuity between ECM connector terminal B9 and body ground. ECM CONNECTOR B (24P) Wire side of female terminals Is there continuity? YES - Repair short in the wire between the VTEC oil pressure switch and the ECM (B9). NO - Substitute a known-good ECM and recheck (see page 11-5). If symptom/indication goes away, replace the original ECM.

Measure voltage between the VTEC oil pressure switch 2P connector terminals No. 1 and No. 2. VTEC OIL PRESSURE SWITCH HARNESS 2P CONNECTOR Wire side of female terminals Is there battery voltage? YES - Go to step 15. NO - Repair open in the wire between the VTEC oil pressure switch and G101. Turn the ignition switch OFF. Disconnect the VTEC solenoid valve 2P connector. Check for resistance between the VTEC solenoid valve 2P connector terminals No. 1 and No. 2. VTEC SOLENOID VALVE 2P CONNECTOR Terminal side of male terminals Is there 14 - 30 ohms? YES - Go to step 18. NO - Replace the VTEC solenoid valve. aaa