Centinel System – Repair Manual – 010-109   Turbocharger Wastegate Controller

Use a 3/8-inch wrench to remove the nut holding the electrical connection of the four-step wastegate controller coil.

Remove the connection.

Remove the four capscrews.

Remove the coil and the fuel shield.

Remove the spring washer, valve disc, and actuator spacer from the valve housing.

Use mineral spirits. Clean all of the parts except the coil assembly.

NOTE: Do not get solvent on the coil. Clean the coil with a dry cloth. Use a 200-grit emery cloth and a flat surface to polish the coil surface.

Check the valve disc, valve seat, and actuator disc for dirt, metal parts, bonding separation, corrosion, cracks, or wear. Replace if necessary.

Use a wire brush to clean any corrosion from the coil terminal.

Check the coil assembly with a multimeter.

Replace the coil if not within specifications.

NOTE: If the coil assembly shows 0 ohm, there is an electrical short in the coil.

Tighten the nut that holds the electrical connection post on the coil.

Assemble the valve as shown.

Install these parts as follows:

• Install a new o-ring between the spacer and the control valve body.
• Install the spacer o-ring groove toward the coil.
• Install the spring washer with the cup side toward the coil.

NOTE: The coil must be orientated with the electrical connection post on the bottom.

NOTE: Make sure the coil is the correct voltage (12 VDC). The coil voltage and part number are cast into the terminal connection end of the coil.

• Align the spacer and valve disc on the control valve body.
• Install a new o-ring.
• Put the spring washer on the valve disc with the cavity side positioned upward.
• Install the shield and coil on the front cover.
• Install a new o-ring and tighten the capscrews.

• Install the electrical connection on the coil.
• Install the nut on the threaded post of the coil.
• Use two wrenches to hold the post of the nut firmly while tightening the connection nut.