Variable Valve Timing Solenoid: Testing and Inspection

COMPONENT INSPECTION
Swirl Control Valve
Supply vacuum to actuator and check swirl control valve operation.




Condition / Swirl control valve
Supply vacuum to actuator / Close
No supply / Open

Swirl Control Valve Control Solenoid Valve
Check solenoid valve air passage continuity.




Condition / Air passage continuity between (A) and (B) / Air passage continuity between (A) and (C)
12V direct current supply between terminals (1) and (2)
No supply / No / Yes

If NG, replace solenoid valve.

One-way Valve
Check one-way valve air passage continuity.




Condition / Air passage continuity
Blow air from side B to A / Yes
Blow air from side A to B / No

If NG, replace one-way valve.

Vacuum Tank




Check vacuum tank leakage.
Apply vacuum -80.0 kPa (-600 mmHg, -23.62 inHg, -11.60 psi). Then keep it for 10 seconds and check there is no leakage.

Swirl Control Valve Control Vacuum Check Switch
1. Disconnect swirl control valve control vacuum check switch harness connector.




2. Use vacuum pump to apply vacuum to swirl control valve control vacuum check switch as shown in figure.
3. Start engine.
4. Check voltage between terminal 2 and engine ground with CONSULT or tester.

Pressure / Voltage (V)
More than -18.7 kPa (-140 mmHg, -5.51 inHg) / Engine ground
-18.7 to -22.7 kPa (-140 to -170 mmHg, -5.51 to -6.69 inHg) / Engine ground or Approx. 4.8
Less than -22.7 kPa (-170 mmHg, -6.69 inHg) / Approx. 4.8

5. If NG, replace swirl control valve control vacuum check switch.