DTC P2646: Oil Pressure Switch Circuit Low Voltage Specal Tools Required Oil pressure gauge attachment 07NAJ-P070100 Low pressure gauge 07406-0070002 Oil pressure hose 07ZAJ-S5A0200 Check the engine oil level. Is the level OK?
YES | - | Go to Step 2 .
NO | - | Adjust the engine oil to the proper level, then go to Step 20 .
Turn the ignition switch ON (II). Clear the DTC with the HDS. Do the VTEC TEST in the INSPECTION MENU with the HDS. Is the result OK?
YES | - | Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the VTEC oil pressure switch, the VTEC solenoid valve and the ECM/PCM.■
NO | - | Go to Step 5 .
Turn the ignition switch OFF. Disconnect the VTEC oil pressure switch 2P connector. Turn the ignition switch ON (II). Check the VTEC PRESS SW in the DATA LIST with the HDS. Is switch ON indicated?
YES | - | Go to Step 9 .
NO | - | Replace the VTEC oil pressure switch, then go to Step 20 .
Turn the ignition switch OFF. Remove the VTEC oil pressure switch (A) or the bolt, and install the special tools as shown, then install the VTEC oil pressure switch or the bolt to the oil pressure gauge adapter (B). NOTE: Install the part in the reverse order of removal with a new O-ring. Turn the ignition switch ON (II). Do the VTEC TEST in the INSPECTION MENU with the HDS. Cheack the oil pressure. Does the oil pressure increase at least 392 kPa (4.0 kgf/cm 2 , 56.9 psi)?
YES | - | Replace the VTEC oil pressure switch, , then go to Step 21 .
NO | - | Inspect the VTEC system. If is OK, replace the VTEC solenoid valve, then go to Step 21 .
Turn the ignition switch OFF. Jump the SCS line with the HDS. Disconnect the VTEC oil pressure switch 2P connector. Disconnect ECM/PCM connector B (24P). |