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OCV FOR HYDRAULIC VARIABLE VALVE TIMING SYSTEM INSPECTION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (E))]

OCV FOR HYDRAULIC VARIABLE VALVE TIMING SYSTEM INSPECTION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (E))]

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Warning
•  A hot engine can cause severe burns. Turn off the engine and wait until it is cool before servicing.

Hydraulic Variable Valve Timing Control System Operation Inspection


When idling cannot be continued

1.  Remove the OCV for hydraulic variable valve timing system. (See OCV FOR HYDRAULIC VARIABLE VALVE TIMING SYSTEM REMOVAL/INSTALLATION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (E))].)

2.  Verify that the spool valve is at maximum advanced position.

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•  If there is a malfunction, replace the OCV for hydraulic variable valve timing system. (See OCV FOR HYDRAULIC VARIABLE VALVE TIMING SYSTEM REMOVAL/INSTALLATION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (E))].)

3.  Connect the OCV for hydraulic variable valve timing system connector.

4.  Switch the ignition ON (engine off).

5.  Verify that the spool valve is at the maximum advanced position.

•  If the spool valve is stuck in the retard direction, inspect for the following:
―  Short circuit in wiring harnesses or connectors between OCV for hydraulic variable valve timing system and PCM

6.  Inspect the hydraulic variable valve timing actuator. (See ELECTRIC VARIABLE VALVE TIMING ACTUATOR, HYDRAULIC VARIABLE VALVE TIMING ACTUATOR REMOVAL/INSTALLATION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (E))].)


When idling can be continued

Using The M-MDS
1.  Connect the M-MDS to the DLC-2.
2.  Warm up the engine.
3.  Using the simulation function [VLV_TIMING_DSD_EX], verify that the engine speed fluctuates when the OCV for hydraulic variable valve timing system duty value is 100%. (See SIMULATION INSPECTION.)
If the engine speed fluctuates, verify the condition of the timing chain assembly (valve timing).
If the engine speed does not fluctuate, perform the following inspections.
1.  OCV for hydraulic variable valve timing system coil resistance inspection and spool valve operation inspection. (See Coil resistance inspection.)(See Spool valve operation inspection.)
2.  Inspect the following wiring harnesses and connectors between the OCV for hydraulic variable valve timing system and PCM for an open and short circuit.
•  Between OCV for hydraulic variable valve timing system terminal A and PCM terminal 1CO
•  Between OCV for hydraulic variable valve timing system terminal B and F12 15A fuse, and F12 15 fuse and main relay terminal C
3.  Inspect the oil passage for clogging and leakage.
Oil passage
―  Between engine oil solenoid valve and OCV for hydraulic variable valve timing system
―  Between OCV for hydraulic variable valve timing system and camshaft
―  Oil passage inside camshaft
4.  If the inspection items are normal, replace the hydraulic variable valve timing actuator. (See ELECTRIC VARIABLE VALVE TIMING ACTUATOR, HYDRAULIC VARIABLE VALVE TIMING ACTUATOR REMOVAL/INSTALLATION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (E))].)
Without Using the M-MDS
1.  Disconnect the OCV for hydraulic variable valve timing system connector.
2.  Start the engine and idle it.
Note
•  When applying battery voltage between the OCV for hydraulic variable valve timing system terminals, the positive and negative cables can be connected to either terminal A or B.
3.  Verify that the engine idles roughly or stalls when battery voltage is applied between OCV for hydraulic variable valve timing system terminals A and B.
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If the engine idles roughly or stalls, verify the condition of the timing chain assembly (valve timing).
If the engine does not idle roughly or stall, perform the following inspections.
1.  OCV for hydraulic variable valve timing system coil resistance inspection and spool valve operation inspection (See Coil resistance inspection.)(See Spool valve operation inspection.)
2.  Inspect the following wiring harnesses and connectors between the OCV for hydraulic variable valve timing system and PCM for an open and short circuit.
•  Between OCV for hydraulic variable valve timing system terminal A and PCM terminal 1CO
•  Between OCV for hydraulic variable valve timing system terminal B and F12 15A fuse, and F12 15 fuse and main relay terminal C
3.  Inspect the oil passage for clogging and leakage.
Oil passage
―  Between engine oil solenoid valve and OCV for hydraulic variable valve timing system
―  Between OCV for hydraulic variable valve timing system and camshaft
―  Oil passage inside camshaft
4.  If the inspection items are normal, replace the hydraulic variable valve timing actuator. (See ELECTRIC VARIABLE VALVE TIMING ACTUATOR, HYDRAULIC VARIABLE VALVE TIMING ACTUATOR REMOVAL/INSTALLATION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (E))].)


Coil resistance inspection

1.  Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

2.  Remove the plug hole plate. (See PLUG HOLE PLATE REMOVAL/INSTALLATION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (E))].)

3.  Disconnect the OCV for hydraulic variable valve timing system connector.

4.  Measure the resistance between terminals A and B using an ohmmeter.

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OCV for hydraulic variable valve timing system coil resistance
6.9—7.5 ohms [20°C {68°F}]
•  If not as specified, replace the OCV for hydraulic variable valve timing system. (See OCV FOR HYDRAULIC VARIABLE VALVE TIMING SYSTEM REMOVAL/INSTALLATION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (E))].)

5.  Install in the reverse order of removal.


Spool valve operation inspection

1.  Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

2.  Remove the OCV for hydraulic variable valve timing system. (See OCV FOR HYDRAULIC VARIABLE VALVE TIMING SYSTEM REMOVAL/INSTALLATION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (E))].)

3.  Verify that the spool valve in the OCV for hydraulic variable valve timing system is in the maximum valve timing advance position as indicated in the figure.

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•  If not as specified, replace the OCV for hydraulic variable valve timing system. (See OCV FOR HYDRAULIC VARIABLE VALVE TIMING SYSTEM REMOVAL/INSTALLATION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (E))].)

4.  Verify that the battery is fully charged. (See BATTERY INSPECTION [(E)].)

•  If not as specified, recharge the battery. (See BATTERY RECHARGING [(E)].)

Note
•  When applying battery positive voltage between the OCV for hydraulic variable valve timing system terminals, the connection can be either of the following:
―  Positive battery cable to terminal A, negative battery cable to terminal B
―  Positive battery cable to terminal B, negative battery cable to terminal A
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5.  Apply battery positive voltage between the OCV for hydraulic variable valve timing system terminals and verify that the spool valve operates and moves to the maximum valve timing retard position.

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•  If not as specified, replace the OCV for hydraulic variable valve timing system. (See OCV FOR HYDRAULIC VARIABLE VALVE TIMING SYSTEM REMOVAL/INSTALLATION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (E))].)

6.  Stop applying battery positive voltage and verify that the spool valve returns to the maximum valve timing advance position.

•  If not as specified, replace the OCV for hydraulic variable valve timing system. (See OCV FOR HYDRAULIC VARIABLE VALVE TIMING SYSTEM REMOVAL/INSTALLATION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (E))].)

7.  Install the OCV for hydraulic variable valve timing system. (See OCV FOR HYDRAULIC VARIABLE VALVE TIMING SYSTEM REMOVAL/INSTALLATION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (E))].)