Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Turbocharger (TC) Control Valve
The turbocharger (TC) control valve is used to open and close the connection between the intake manifold and the pressure servo for the turbocharger (TC). The valve controls the pressure servo which affects the boost pressure control (BPC) valve and therefore the boost pressure. See also: FUNCTION
The valve is an electro-magnetic valve which is powered from the system relay. When the valve is to be opened the valve is internally grounded in the engine control module (ECM). By grounding the valve using a pulse width modulated (PWM) signal the valve can be steplessly controlled.
The valve is closed when in the standby position (open-circuit).
The engine control module (ECM) can diagnose the turbocharger (TC) valve.
The turbocharger control valve is located on the upper part of the engine (near the upper engine mount).
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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