Wastegate: Testing and Inspection
Wastage Control System Operation InspectionIf simulation function of WDS or equivalent 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 4H)
- Wastegate control solenoid valve (Stuck open)
4. Warm up the engine to normal operating temperature.
5. Connect the WDS or equivalent to the DLC-2 and verify that DTC P0245 or P0246 are shown. Perform the DTC inspection. Diagnostic Trouble Code Descriptions
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 WDS or equivalent.
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 WDS or equivalent is not used:
11. Start the engine and run it is idling.
12. Disconnect the hose between the wastegate control solenoid valve and the intake pipe.
13. 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 4H)
- Wastegate control solenoid valve (Stuck open)
14. Warm up the engine to normal operating temperature.
15. Connect the WDS or equivalent to the DLC-2 and verify that the DTC P0245 or P0246 are shown. Perform the DTC inspection. Diagnostic Trouble Code Descriptions
16. Warm up the engine to normal operating temperature.
17. Monitor the VGT and APP PIDs using the WDS or equivalent.
18. The hose between the wastegate control solenoid valve and intake pipe is disconnected.
19. 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))