When idling can be continued

Disconnect the OCV for hydraulic variable valve timing system connector. (See OCV For Hydraulic Variable Valve Timing System Removal/Installation .)
Warm up the engine and idle it.
Apply the battery voltage to the OCV for hydraulic variable valve timing system 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 .)
- If the engine does not idle rough or stalls, go to the next step.
Remove the OCV for hydraulic variable valve timing system and perform the Spool Valve Operation Inspection. (See OCV For Hydraulic Variable Valve Timing System Removal/Installation .)
- If not as specified, inspect the following:
  - OCV for hydraulic variable valve timing system (See OCV For Hydraulic Variable Valve Timing System Inspection .)
  - Harnesses and connectors between OCV for hydraulic variable valve timing system and PCM have an open or short circuit
- If as specified, inspect the following hydraulic passages for restriction or leakage or both:
  - Engine oil solenoid valve-OCV for hydraulic variable valve timing system
  - OCV for hydraulic variable valve timing system-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 .)