CX-7 L4-2.3L Turbo (2007)
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].)
(See DTC P0246[L3 WITH TC].)
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.
(See WASTEGATE CONTROL SOLENOID VALVE INSPECTION[L3 WITH TC].) See: Wastegate Solenoid/Testing and
Inspection/Component Tests and General Diagnostics
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].)
(See DTC P0246[L3 WITH TC].)
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)