Ignition "OFF".

Disconnect Battery (-) terminal.

Refer to "Shop Manual" and disconnect Intake OCV connector.

Measure resistance between Pin No. 2 (Power) terminal and Pin No. 1 (Control) terminal of Exhaust OCV component.

Is measured value within specification?

	▶ Go to next procedure.
	▶ Carefully re-do this troubleshooting guide steps. ▶ If problem still occurs, replace Exhaust OCV and then go to "Verification of Vehicle Repair" procedure.

Connect GDS to Data Link Connector(DLC).

Ignition "ON" & Engine "OFF".

Warm up the engine to normal operating temperature.

Perform "Oil Control Valve - Exhaust Bank 1(Option)" in "Actuation Test" with GDS.

Monitor "OCV Holding Pulse Width Exhaust CVVT(Option)" parameter in "Current Data" with GDS.

Is the parameter displayed within specification?

	▶ Go to next procedure.
	▶ Carefully re-do this troubleshooting guide steps. ▶ If problem still occurs, replace Exhaust OCV and then go to "Verification of Vehicle Repair" procedure.

Refer to "Shop Manual" and remove Exhaust CVVT Assembly.

Check if Intake Cam-phaser is locked.

There are 2 oil holes on the cam journal. Upper hole is for advance and the lower hole is for retard.

Apply masking tape to all oil path holes except the advance hole("B") shows in figure below.

To release the CVVT Lock pin, wrap some tape around the tip of an air pressure adapter and apply low air pressure(Approx. 21 psi(1.5 kg/cm2) 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 "Advanced" direction as showed in figure below.

Allow the CVVT assembly to move in the "Advance" and "Retard" direction to ensure there is no binding and that it moves freely.

Turn the CVVT by hand and make sure it locks in the maximum "Retard" position.

Does Intake CVVT Assembly operates properly?

	▶ Go to next procedure.
	▶ Carefully re-do this troubleshooting guide steps. ▶ If problem still occurs, replace Exhaust CVVT Assebmly and then go to "Verification of Vehicle Repair" procedure.

Refer to "Shop Manual" and inspect proper installation of timing chain and alignment of camshaft and crankshaft.

Has any problems been found?

▶ Check the camshaft sprocket and crankshaft sprocket for abnormal wear, cracks, or damange and replace as necessary. ▶ Inspect the tensioner arm and chain guide for abnormal wear, cracks, or damage and replace as necessary. ▶ Check the tensioner piston moves smoothly when the ratchet pawl is released with thin rod. ▶ Perform applicable troubleshooting guide as necessary, and then go to "Verification of Vehicle Repair" procedure.

▶ Carefully re-do this troubleshooting guide steps. ▶ If problem still occurs, replace PCM and then go to "Verification of Vehicle Repair" procedure.