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Inspect Electric Variable Valve Timing Motor/Driver

Electric variable valve timing driver control inspection

1.Perform the KOER self-test. If the following DTCs are detected, repair the applicable malfunctioning location according to the applicable DTC troubleshooting. (Refer to [DTC INSPECTION] in the troubleshooting manual)

• P0010:00, P0011:00, P0012:00, P1380:00

2.Access the ECM PIDs [VLV_TIMING_ACT_IN] and [VLV_TIMING_DSD_IN] using the M-MDS data monitor function.

Warning

• Heed the following to ensure safety while driving the vehicle.

― To prevent an accident, work with another person (one person drives vehicle, other person operates M-MDS).

― Comply with the legal speed limits and perform the procedure in a safe place.

3.Drive the vehicle (accelerate/decelerate and drive at constant speed), and verify that the PID [VLV_TIMING_ACT_IN] value changes in conjunction with the PID [VLV_TIMING_DSD_IN] value.

• If the change cannot be verified, replace the electric variable valve timing motor/driver. (See (See ELECTRIC VARIABLE VALVE TIMING MOTOR/DRIVER REMOVAL/INSTALLATION [PYUL].).)

Electric variable valve timing motor unit inspection

Warning

• A hot engine can cause severe burns. Turn off the engine and wait until it is cool before performing the servicing.

Caution

• Do not disassemble the electric variable valve timing motor/driver because it is a precision unit.

• Do not apply excessive force when rotating the electric variable valve timing motor joint. If it is rotated with excessive force, the electric variable valve timing motor could be damaged.

Note

• Perform the procedure with the electric variable valve timing motor/driver removed. (See ELECTRIC VARIABLE VALVE TIMING MOTOR/DRIVER REMOVAL/INSTALLATION [PYUL].)

1.Rotate the joint of the electric variable valve timing motor left and right with the fingertips and verify that it rotates smoothly in 15° increments.

Note

• Rotate the joint area smoothly using only the tips of your fingers.

• Move the joint of the electric variable valve timing motor in 15° increments and move the joint part 24 times to make one round.

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• If it does not rotate smoothly, replace the electric variable valve timing motor/driver. (See ELECTRIC VARIABLE VALVE TIMING MOTOR/DRIVER REMOVAL/INSTALLATION [PYUL].)