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. Refer too ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.5T)] .)
  • Perform the DTC inspection. Refer too DTC P2090:00 [PCM (SKYACTIV-G 2.5T)] .) Refer too DTC P2091:00 [PCM (SKYACTIV-G 2.5T)] .)
• Start the engine and let it idle.
• Access the simulation item VT_EX_DES using the M-MDS. Refer too ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.5T)] .)
• 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). Refer too HYDRAULIC VARIABLE VALVE TIMING ACTUATOR INSPECTION [SKYACTIV-G 2.5T] .)
  • If the engine does not idle rough or stalls, go to the next step.
• Remove the OCV while the connector is connected. Refer too OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [SKYACTIV-G 2.5T] .)
• Switch the ignition ON (engine off).
• Access the simulation item VT_EX_DES using the M-MDS. Refer too ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.5T)] .)
• 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-Camshaft
    • Camshaft internal passage
  • If not as specified, inspect the following:
    • OCV operation Refer too OIL CONTROL VALVE (OCV) INSPECTION [SKYACTIV-G 2.5T] .)
• If they are normal, replace the hydraulic variable valve timing actuator. Refer too ELECTRIC VARIABLE VALVE TIMING ACTUATOR, HYDRAULIC VARIABLE VALVE TIMING ACTUATOR REMOVAL/INSTALLATION [SKYACTIV-G 2.5T] .)

  If simulation function of M-MDS is not used: 

• Disconnect the OCV connector. Refer too OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [SKYACTIV-G 2.5T] .)
• 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). Refer too HYDRAULIC VARIABLE VALVE TIMING ACTUATOR INSPECTION [SKYACTIV-G 2.5T] .)
  • If the engine does not idle rough or stalls, go to the next step.
• Remove the OCV and perform the Spool Valve Operation Inspection. Refer too OIL CONTROL VALVE (OCV) INSPECTION [SKYACTIV-G 2.5T] .)
  • If not as specified, inspect the following:
    • OCV Refer too OIL CONTROL VALVE (OCV) INSPECTION [SKYACTIV-G 2.5T] .)
    • 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-Camshaft
    • Camshaft internal passage
• If they are normal, replace the hydraulic variable valve timing actuator. Refer too ELECTRIC VARIABLE VALVE TIMING ACTUATOR, HYDRAULIC VARIABLE VALVE TIMING ACTUATOR REMOVAL/INSTALLATION [SKYACTIV-G 2.5T] .)