Check resistance of OCV
IG "OFF". Disconnect OCV connector.
Measure resistance between power and signal terminals of OCV. (Component Side)
Specification: Approx. 9.9±0.5Ω at 20℃(68℉)
Is the measured resistance within specification ?
 | ▶ Go to next step as below. |
 | ▶ Substitute with a known - good OCV and check for proper operation. If the problem is corrected, replace OCV and go to "Verification of Vehicle Repair" procedure. |
Check operation of OCV
Start the engine and let it idle.
With OCV connector still disconnected, connect 12V and a ground to 2 and 1 terminals of the OCV (Component side).
Test Condition | Disconnect OCV connector | Apply battery voltage |
Normal Value | Normal engine speed | Rough idle or engine stall |
Has a problem been found?
| ▶ Go to " Check OCV and Filter" procedure. |
| ▶ Go to "Check CVVT(Continuously Variable Valve Timing) Assembly" procedure. |
Check OCV and Filter
IG "OFF".
Check OCV filter for sticking or contamination.
Remove the OCV and visually check the spool column of OCV for contamination.
Has a problem been found?
| ▶ Clean or replace as necessary. Go to " Verification of Vehicle Repair" procedure. |
| ▶ Go to next step below. |
Apply 12V and a ground to 2 and 1 terminals of the OCV(Component side).
Verify that a "clicking" sound is heard when applying the battery voltage.
Repeat this procedure 4 or 5 times to ensure intake OCV reliability.
Is OCV working properly?
| ▶ Go to "Check CVVT Assembly" procedure. |
| ▶ Check OCV for contamination, deterioration, or damage. Substitute with a known-good OCV and check for proper operation. If the problem is corrected, replace OCV and then go to "Verification of Vehicle Repair" procedure. |
Check CVVT(Continuously Variable Valve Timing) Assembly
Remove the CVVT assembly. Refer to "Removal Procedure" in Workshop Manual.
Check that the CVVT assembly is locked.
One of the 2 holes on the cam journal is for advances (upper) and the rest is for retards (lower). Apply masking tape to all oil path holes except the one advance hole ("B") indicated by the arrow as shown in the figure.
To release the CVVT lock pin, wrap some tape around the tip of an air pressure adapter and apply low air pressure of approx. 150kPa(1.5kg/㎠, 21 psi) to the exposed camshaft port. Wrap a shop towel or rag around the CVVT because residual oil may leak out of the unit when applying air pressure.
With low air pressure applied, turn the CVVT to the ADVANCE direction as indicated in the figure.
If too much air leaks when applying the low air pressure, the CVVT lock pin may not release and the CVVT may not turn.
Allow the CVVT assembly to move in the ADVANCE and DELAY directions to ensure there is no binding and that it moves freely.(Movable smoothly in the range about 20˚)
Turn the CVVT by hand and make sure it locks in the maximum delay angle position.
Is CVVT assembly working properly?
| ▶ Operate engine to check for DTC resetting. If okay, go to "Verification of Vehicle Repair" procedure. |
| ▶ Replace the CVVT assembly and go to "Verification of Vehicle Repair" procedure. |
