Hydraulic variable valve timing control system operation inspection (when idling can be continued) (using the M-MDS)
WARNING: This page is about a different variant/trim than selected.
NOTE:
- Perform the procedure with the M-MDS connected to the DLC-2.
- Warm up the engine.
- Using the PCM simulation function [VLV_TIMING_DSD_EX], verify that the engine speed fluctuates when the OCV duty value is 100%. (Refer to [SIMULATION INSPECTION
] in the appropriate troubleshooting information)
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.
- OCV coil resistance inspection and spool valve operation inspection. (See Coil resistance inspection ). (See Spool valve operation inspection ).
- Inspect the following wiring harnesses and connectors between the OCV and PCM for an open and short circuit.
- Between OCV terminal A and PCM terminal 1CO
- Between OCV terminal B and F24 15A fuse, and F24 15A fuse and main relay terminal C
- Inspect the oil passage for clogging and leakage.
Oil passage
- Between engine oil solenoid valve and OCV
- Between OCV and camshaft
- Oil passage inside camshaft
- If the inspection items are normal, replace the hydraulic variable valve timing actuator. (See HYDRAULIC VARIABLE VALVE TIMING ACTUATOR REMOVAL/INSTALLATION [PYUL] ).