When diagnosing the Continuously Variable Valve Timing (CVVT) system for rough idling, poor acceleration, camshaft timing misalignment-related trouble codes, misfire-related trouble codes and/or other related symptoms, it may be required to inspect the Oil Control Valve (OCV) for proper operation.
APPLICABLE VEHICLES
ENGINE VEHICLE MODEL / OCV SUPPLIER
Alpha 1.6L Accent (MC) / Denso
Beta 2.0L 2003-2006 SULEV Elantra (XD)
2004-2008 Tiburon 2.0L (GK)
Tucson 2.0L (JM), Elantra (HD)
Elantra Touring (FD) / all Denso
Theta 2.0L/2.4L Genesis Coupe (BK), Sonata (NF) / Denso
Mu 2.7L Santa Fe (CM) / Delphi
Lambda 3.3L/3.8L Sonata (NF), Santa fe (CM), Azera (TG)
Veracruz (EN), Entourage (EP)
Genesis Coupe (BK), Genesis Sedan (BH) / all Delphi
Tau 4.6L Genesis Sedan (BH) / Denso
RELEVANT DTCs
P0011
"A" camshaft position - timing over-advanced or system performance (Bank 1)
P0012
"A" camshaft position - timing over-retarded (Bank 1)
P0014
"B" camshaft position - timing over-advanced or system performance (Bank 1)
P0015
"B" camshaft position - timing over-retarded (Bank 1)
P0016
Crankshaft position-camshaft position correlation (Bank 1 Sensor A)
P0018
Crankshaft position-camshaft position correlation (Bank 2 Sensor A)
P0021
"A" camshaft position - timing over-advanced or system performance (Bank 2)
P0022
"A" camshaft position - timing over-retarded (Bank 2)
P0300
Random/multiple cylinder misfire detected
OCV COIL RESISTANCE SPECIFICATION
OCV SUPPLIER COIL RESISTANCE AT 68 DEG. F
Denso 6.9 - 7.9 Ohms
Delphi 6.7 - 7.7 Ohms
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INSPECTION PROCEDURE
1. Measure the resistance between the OCV power and signal terminals
MEASURED RESISTANCE
Denso (6.9 - 7.9 Ohms)
Delphi (6.7 - 7.7 Ohms)
RECOMMENDED ACTION
Check if the OCV operates normally by providing 12V power
MEASURED RESISTANCE
Infinity (OPEN)
RECOMMENDED ACTION
Open circuit - replace the OCV
MEASURED RESISTANCE
Below specified range or zero
RECOMMENDED ACTION
Short circuit - replace the OCV
2. Check if the OCV operates normally by providing 12V power.
IMPORTANT: Careful attention is necessary to avoid a short circuit when providing the OCV with 12V power. Spacing between the OCV power and signal terminals is very narrow. Use suitable connections to prevent shorting of the test power supply.
3. When 12V power is provided to the OCV, the OCV must move forward as shown in the following photo.
4. If the OCV does not move forward, inspect for a foreign object (such as an aluminum chip.....example C) that may be jammed inside the OCV. Blow out the foreign object using compressed air and verify that the fault is corrected. If there is no damage to the OCV, do not replace the OCV.
