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