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Five Fast Fixes- 11/27/14

Vehicle:2010 Hyundai Santa Fe GLS 2.4L, L4, MFI, DOHC, VIN B, Eng Version Theta II
Mileage:18,244

Customer Concern:The check engine light is on with an Intake Manifold Runner Performance (Bank1) code P200A.

Tests: 1. Check the resistance of the Variable Charge Motion Actuator (VCMA) motor from terminal 4 to terminal 5. The specification is 3.4 to 4.4Ω at 68 degrees fahrenheit.

2. With the key on, actuate the VCMA motor with a compatible scan tool and confirm the change of VCMA feedback sensor signal and the sound of operation. The specification is about 0.84 volts open and about 4.16 volts closed.

3. If your scan tool will not operate the VCMA motor, backprobe and monitor the VCMA position sensor signal at terminal 2 Black/Orange wire with the key on and apply battery voltage to the motor at terminal 5 Orange wire. Pulse a ground at terminal 4 Pink wire and the position sensor signal voltage should change. Then reverse and apply battery voltage at terminal 4 and pulse a ground at terminal 5 to move it the other way. The specification is about 0.84 volts open and about 4.16 volts closed. The VCMA motor is duty-cycled by the Engine Control Module (ECM) at 50% duty.

4. If the motor is not moving, remove it and verify that the shaft will rotate by hand or if it is stuck in the intake. If it will rotate by hand verify that the motor will operate when not attached to the shaft and if it won't, it has likely failed.

  • Potential Causes: Upper Intake Manifold
  • Variable Charge Motion Actuator (VCMA)

Confirmed Fix:Replaced Variable Charge Motion Actuator (VCMA): Replaced the VCMA and cleaned the intake.

Tech Tips: The Variable Charge Motion Actuator (VCMA) adjusts the runner valve to one of two positions, open or closed. The VCMA system tumbles air flow entering into combustion chamber of each cylinder by closing the VCMA valve in cold start conditions. This valve doesn't have mechanical return spring. If the PCM detects that the opened or closed stop position is out of the specified value, it sets P200A.

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