Inspect VGT solenoid valve operation and vacuum control by using current data inspection.
IG KEY "ON", ENGINE "ON"
Connect scantool to Data Link Connector (DLC).
Allow the engine to warm up to normal operating temperature.
Electrical system and A/CON "OFF".
Monitor "Engine speed", "VGT actuator" and "Boost pressure sensor" parameters on the scantool.
☞ Engine speed : Must keep 720 ± 50 rpm at idle.
☞ VGT actuator : Must keep 80 % at idle.
☞ Boost pressure sensor : Must keep atmospheric pressure of present vehicle position (refer to atmospheric pressure current data) ± 100 hPa at idle.
Monitor changed data of "VGT actuator", "Boost pressure sensor" and changed vacuum at stall test.
☞ Engine speedr : 2,300 ± 100 rpm at stall test.
☞ VGT actuator : 56 % at stall test.
☞ Boost pressure sensor : 2,100 ± 100 hPa at stall test.
Refer to "Stall test" of detail inspections (Equipment settings).
Symptom | Inspection procedure | |
Case1 | ● DTC related to VGT system is displayed and poor acceleration occurs. (Electric VGT is stuck.) | ● If abnormal feedback signal is outputted by ECM control, DTC is displayed in the electric VGT system. ● Refer to DTC guide. |
Case2 | ● "VGT actuator" (80%) is higher than normal but "Boost pressure sensor" is NOT increased normally. | ● Inspect performance decline in the VGT component (damage of turbine or impeller). |
