P1078

DTC P1078 P1084 EVT CONTROL POSITION SENSOR




Component Description
Exhaust valve timing control position sensor detects the concave groove of the exhaust camshaft rear end.
This sensor signal is used for sensing a position of the exhaust camshaft.
This sensor uses a Hall IC.

Based on the position of the exhaust camshaft, ECM controls exhaust valve timing control magnet retarder to optimize the shut/ open timing of exhaust valve for the driving condition.




CONSULT-II Reference Value in Data Monitor Mode




On Board Diagnosis Logic

DTC Confirmation Procedure

NOTE: If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.

WITH CONSULT-II
1. Turn ignition switch ON.




2. Select "DATA MONITOR" mode with CONSULT-II.
3. Start engine and let it idle for 10 seconds.
4. If 1st trip DTC is detected, go to "Diagnostic Procedure".

WITH GST
Follow the procedure WITH CONSULT-II.

EC-EVCSB1-01:

EC-EVCSB2-01:

Wiring Diagram

Diagnostic Procedure (Step 1):

Diagnostic Procedure (Steps 2 - 5):

Diagnostic Procedure (Steps 6 - 11):

Diagnostic Procedure

Component Inspection

EXHAUST VALVE TIMING CONTROL POSITION SENSOR
1. Disconnect exhaust valve timing control position sensor harness connector.
2. Loosen the fixing bolt of the sensor.
3. Remove the sensor.




4. Visually check the sensor for chipping.




5. Check resistance as shown.
6. If NG, replace exhaust valve timing control position sensor.