Wastegate: Testing and Inspection

Wastegate Control System Operation Inspection

If simulation function of M-MDS is used:
1. Start the engine and run it is idling.
2. Disconnect the hose between the wastegate control solenoid valve and the intake pipe.
3. Put a finger to the wastegate control solenoid valve and verify that there is no pressure applied.
- If there is pressure, inspect the following:
- Wiring harness and connectors (Wastegate control solenoid valve-PCM terminal 2AA)
- Wastegate control solenoid valve (Stuck open)

4. Warm up the engine to normal operating temperature.
5. Connect the M-MDS to the DLC-2 and verify that DTC P0245 or P0246 are shown. Perform the DTC inspection.
(See DTC P0245 [L3 WITH TC].) P0245
(See DTC P0246 [L3 WITH TC].) P0246

6. Select the VGT PID.
7. Increase the duty value of the wastegate control solenoid valve and inspect if the operation sound of the solenoid valve is heard.
- If the operation sound is heard, inspect for loose or damaged vacuum hoses. (Wastegate actuator - wastegate control solenoid valve - intake hose)
- If the operation sound is not heard, perform the wastegate control solenoid valve inspection.

8. Warm up the engine to normal operating temperature.
9. Monitor the VGT and APP PIDs using the M-MDS.
10. Run the engine with the APP PID above 30% and verify that the VGT PID value increases from 0%.
- If the VGT PID is 0%, inspect the APP PID.

If simulation function of M-MDS is not used:
1. Start the engine and run it is idling.
2. Disconnect the hose between the wastegate control solenoid valve and the intake pipe.
3. Put a finger to the wastegate control solenoid valve and verify that there is no pressure applied.
- If there is pressure, inspect the following:
- Wiring harness and connectors (Wastegate control solenoid valve - PCM terminal 2AA)
- Wastegate control solenoid valve (Stuck open)

4. Warm up the engine to normal operating temperature.
5. Connect the M-MDS to the DLC-2 and verify that the DTC P0245 or P0246 are shown. Perform the DTC inspection.
(See DTC P0245 [L3 WITH TC].) P0245
(See DTC P0246 [L3 WITH TC].) P0246

6. Warm up the engine to normal operating temperature.
7. Monitor the VGT and APP PIDs using the M-MDS.
8. The hose between the wastegate control solenoid valve and intake pipe is disconnected.
9. Run the engine with the APP PID above 30% and verify that the VGT PID value increases from 0% and there is pressure applied.
- If the VGT PID is 0%, inspect the TP_REL PID.
- If there is no pressure applied, inspect for the following:
- Wastegate control solenoid valve (Stuck closed)
- Hose connection (Intake hose (turbocharger compressor downstream side) - wastegate actuator intake hose (turbocharger compressor upstream side))

Variable Valve Timing Control System Operation Inspection
When idling cannot be continued
1. Remove the oil control valve (OCV) and verify that the spool valve is at maximum retard position.
2. Connect the oil control valve (OCV).
3. Turn the ignition switch to the ON position.
4. Verify that the spool valve is at the maximum retard position.
- If the spool valve is stuck in the advance direction, inspect for the following:
- Short circuit in wiring harnesses or connectors between the oil control valve (OCV) and the PCM.

5. Inspect the variable timing actuator.

When idling can be continued
If simulation function of M-MDS is used:
1. Warm up the engine to normal operating temperature.
2. Connect the M-MDS to the DLC-2.
3. Start the engine and run it is idling.
4. Select the VT DUTY1 PID.
5. Increase the oil control valve (OCV) duty value and verify that the engine idles roughly or stalls.
- If as specified, inspect the timing belt component (valve timing deviation).
- If not as specified, go to the next step.

6. Remove the oil control valve (OCV) while the connector is connected.
7. Turn the ignition switch to the ON position.
8. Select VT DUTY1 PID.
9. Increase the oil control valve (OCV) duty value and verify that the spool valve operates in the advance direction.
- If as specified, inspect the following hydraulic passage for clogging and/or leakage.
- Oil pressure switch - oil control valve (OCV)
- Oil control valve (OCV) - camshaft
- Camshaft internal passage

- If not as specified, inspect the following:
- Oil control valve (OCV) operation
- Harness and connectors for open or short circuit (Oil control valve (OCV) - PCM terminal 2AF)

10. If they are normal, replace the intake camshaft pulley (With a built-in variable valve timing actuator).

If simulation function of M-MDS is not used:
1. Disconnect the oil control valve (OCV) connector.
2. Warm up the engine and idle it.
3. Apply battery voltage to the oil control valve (OCV) and verify that the engine idles roughly or stalls.
- If the engine idles roughly or stalls, inspect the timing belt component (valve timing deviation).
- If the engine does not idle roughly or stalls, go to the next step.

4. Remove the oil control valve (OCV) and perform the spool valve operation inspection.
- If not as specified, inspect the following:
- Oil control valve (OCV)
- Harnesses and connectors between oil control valve (OCV) and PCM have an open or short circuit.

- If as specified, inspect the following hydraulic passages for clogging or leakage or both:
- Oil pressure switch - oil control valve (OCV)
- Oil control valve (OCV) - camshaft
- Camshaft internal passage

5. If they are normal, replace the camshaft pulley (with built-in variable valve timing actuator).