When idling can be continued

If simulation function of M-MDS is used: 

• Warm up the engine to normal operating temperature.
• Connect the M-MDS to the DLC-2.
• Verify that DTC P2090:00 or P2091:00 is displayed. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.5] .)
  • Perform the DTC inspection. (See DTC P2090:00 [SKYACTIV-G 2.5] .) (See DTC P2091:00 [SKYACTIV-G 2.5] .)
• Start the engine and let it idle.
• Access the simulation item VT_EX_DES using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.5] .)
• Increase the OCV duty value and verify that the engine idles rough or stalls.
  • If the engine idles rough or stalls, inspect the timing chain component (valve timing deviation). (See HYDRAULIC VARIABLE VALVE TIMING ACTUATOR INSPECTION [SKYACTIV-G 2.5] .)
  • If the engine does not idle rough or stalls, go to the next step.
• Remove the OCV while the connector is connected. (See OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [SKYACTIV-G 2.5] .)
• Switch the ignition ON (engine off).
• Access the simulation item VT_EX_DES using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.5] .)
• Increase the OCV duty value and verify that the spool valve operates in the retard direction.
  • If as specified, inspect the following hydraulic passage for restriction and/or leakage:
    • Oil pressure switch-OCV
    • OCV-Exhaust camshaft
    • Exhaust camshaft internal passage
  • If not as specified, inspect the following:
    • OCV operation (See OIL CONTROL VALVE (OCV) INSPECTION [SKYACTIV-G 2.5] .)
• If they are normal, replace the exhaust camshaft sprocket. (See ELECTRIC VARIABLE VALVE TIMING ACTUATOR, HYDRAULIC VARIABLE VALVE TIMING ACTUATOR REMOVAL/INSTALLATION [SKYACTIV-G 2.5] .)

  If simulation function of M-MDS is not used: 

• Disconnect the OCV connector. (See OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [SKYACTIV-G 2.5] .)
• Warm up the engine and idle it.
• Apply the battery voltage to the OCV and verify that the engine idles rough or stalls.
  • If the engine idles rough or stalls, inspect the timing chain component (valve timing deviation). (See HYDRAULIC VARIABLE VALVE TIMING ACTUATOR INSPECTION [SKYACTIV-G 2.5] .)
  • If the engine does not idle rough or stalls, go to the next step.
• Remove the OCV and perform the Spool Valve Operation Inspection. (See OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [SKYACTIV-G 2.5] .)
  • If not as specified, inspect the following:
    • OCV (See OIL CONTROL VALVE (OCV) INSPECTION [SKYACTIV-G 2.5] .)
    • Harnesses and connectors between OCV and PCM have an open or short circuit
  • If as specified, inspect the following hydraulic passages for restriction or leakage or both:
    • Oil pressure switch-OCV
    • OCV-Exhaust camshaft
    • Exhaust camshaft internal passage
• If they are normal, replace the hydraulic variable valve timing actuator. (See ELECTRIC VARIABLE VALVE TIMING ACTUATOR, HYDRAULIC VARIABLE VALVE TIMING ACTUATOR REMOVAL/INSTALLATION [SKYACTIV-G 2.5] .)