Variable Tumble Control System (VTCS) Inspection

1. Connect the SST (NGS tester) to the DLC-2.
2. Access ECT PID.
3. Verify ECT PID is 65 °C (149 °F) or less.
4. Start the engine.




5. Verify that the rod of tumble swirl control actuator is pulled.

6. If the rod is not pulled, inspect the following.
- VTCS shutter valve actuator
- VTCS delay valve
- VTCS chamber
- Vacuum hose
- Tumble swirl control solenoid valve
- Wiring harness and connectors (Main relay - VTCS solenoid valve - PCM terminal 19)

7. Access RPM and IMRC PIDs.

8. Inspect the rod operation and IMRC PID under the following condition.
- If the rod operation and IMRC PID are not as specified, inspect the following:
- Tumble swirl control actuator
- Vacuum delay valve
- Vacuum chamber
- Vacuum hose
- VTCS solenoid valve
- Wiring harness and connectors (Main relay - VTCS solenoid valve - PCM terminal 19)




Rod operation