P0021

DTC P0021 IVT (Intake Valve Timing) CONTROL

Description




SYSTEM DESCRIPTION
This mechanism hydraulically controls cam phases continuously with the fixed operating angle of the intake valve.

The ECM receives signals such as crankshaft position, camshaft position, engine speed, and engine coolant temperature. Then, the ECM sends ON/OFF pulse duty signals to the camshaft timing control valve depending on driving status. This makes it possible to control the shut/open timing of the intake valve to increase engine torque in low/mid speed range and output in high-speed range.

CONSULT-II Reference Value In Data Monitor Mode:

On Board Diagnosis Logic:

Fail-safe Mode:

DTC Confirmation Procedure

CAUTION: Always drive at a safe speed.

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. Maintain the given conditions for at least 20 consecutive seconds.
4. If 1st trip DTC is detected, go to "Diagnostic Procedure" below.

WITH GST
Follow the procedure "WITH CONSULT-II" above.

EC-IVCB1-01:

EC-IVCB2-01:

Wiring Diagram


Diagnostic Procedure

Diagnostic Procedure Step 1 - 4:

Diagnostic Procedure Step 5 - 8:

Component Inspection

INTAKE VALVE TIMING CONTROL SOLENOID VALVE
1. Disconnect intake valve timing control solenoid valve harness connector.







2. Check resistance between intake valve timing control solenoid valve terminals as shown.