Variable Valve Timing Actuator: Testing and Inspection

Engine

VTEC System Oil Pressure Troubleshooting

VTEC System Oil Pressure Troubleshooting

Special Tools Required

*Pressure Gauge Adapter 07NAJ-P07010A
*A/T Low Pressure Gauge w/Panel 07406-0070301
*A/T Pressure Test Hose 07AAJ-PY4A100
*A/T Pressure Adapter 07MAJ-PY40120
*Oil Pressure Hose 07ZAJ-S5AA200
NOTE:
* Check for Temporary DTCs or DTCs with the HDS before this procedure. If there are any DTCs indicated, troubleshoot them first, then do this procedure.
* Check that the oil pressure indicator goes off after starting engine before this procedure.

1. VTEC system operation check (with HDS):

VTEC system operation check (with HDS)
-1. Turn the ignition switch to ON (II).

-2. Do the VTEC TEST in the INSPECTION MENU with the HDS.

Can you hear the rocker arm oil control solenoid click?
-YES- Go to step 3.
-NO- Go to step 2.

2. Rocker arm oil control solenoid operation check:

Rocker arm oil control solenoid operation check
-1. Turn the ignition switch to LOCK (0).

-2. Disconnect the following connector.





-3. At the solenoid side, connect terminals A and B with a jumper wire.














Is the rocker arm oil control solenoid clicking?
-YES- The rocker arm oil control solenoid is OK. Update the ECM/PCM if it does not have the latest software ECM/PCM Update, or substitute a known-good ECM/PCM Service and Repair.
-NO- Failure in the rocker arm oil control solenoid. Replace the rocker arm oil control valve Service and Repair.

3. VTEC system oil pressure check:

VTEC system oil pressure check
-1. Turn the ignition switch to LOCK (0).

-2. Remove the bolt (A) from rocker arm oil control valve, and attach the special tools as shown, then attach the bolt that was removed to the oil pressure gauge adapter (B).





-3. Start the engine. Hold the engine speed at 3,000 min-1 without load (A/T in P or N, M/T in neutral) until the radiator fan comes on.

-4. Check the oil pressure at the engine speed of 1,000 to 2,000 rpm.
NOTE: Keep the measuring time as short as possible (less than 1 minute).

Is the oil pressure below 49 kPa (0.5 kgf/cm2, 7 psi)?
-YES- VTEC system oil pressure is OK. Go to step 4.
-NO- Failure in spool valve (stuck open). Replace the rocker arm oil control valve Service and Repair.

4. Rocker arm oil control solenoid operation check:

Rocker arm oil control solenoid operation check
-1. Turn the ignition switch to LOCK (0).

-2. Disconnect the following connector.





-3. At the solenoid side, connect terminals A and B with a jumper wire.














-4. Start the engine.

-5. Check the oil pressure at the engine speed of 3,500 rpm.
NOTE: Keep the measuring time as short as possible (less than 1 minute).

Is the oil pressure above 390 kPa ( 4.0 kgf/cm2 , 57 psi)?
-YES- The VTEC system oil pressure and rocker arm oil control solenoid are OK.
-NO- The oil pressure is lower than normal condition. Go to step 5.

5. Rocker arm oil control valve filter visual check:

Rocker arm oil control valve filter visual check
-1. Remove the rocker arm oil control valve.

-2. Check the rocker arm oil control valve filter for dirt and clogging.

Is the rocker arm oil control valve filter dirty or clogged?
-YES- Replace the engine oil Service and Repair, the engine oil filter Service and Repair, and the rocker arm oil control valve with new rocker arm oil control valve filter Service and Repair.
-NO- Failure in spool valve (stuck closed). Replace the rocker arm oil control valve Service and Repair.