Cummins ISX11.9 CM2250 – Service Manual 019-390   Turbocharger Speed Sensor

The turbocharger speed sensor is located on the back of the turbocharger, next to the turbocharger oil supply line.

CAUTION  When removing the turbocharger speed sensor, use a twisting motion while pulling upward. Prying on the sensor body with a screwdriver can lead to broken sensors and can result in unwarranted turbocharger replacement. Pliers are recommended for turbocharger speed sensor removal.

Lift up on the locking tab and pull the electrical connectors apart. Remove the mounting capscrew.

Use pliers to remove the turbocharger speed sensor. Use a twisting motion while pulling outward.

It is mandatory that the used turbocharger speed sensor o-ring is removed and discarded.

Inspect the turbocharger speed sensor body for signs of melting or damage. If signs of melting or damage are found on the sensor, inspect the turbocharger coolant supply for restriction.

Make sure the new turbocharger speed sensor has a new o-ring installed.

Lubricate the o-ring with clean engine oil.

Install the new turbocharger speed sensor into the engine.

Apply Loctite™, Part Number 3824040, onto the capscrew.

Install the capscrew and tighten.

CAUTION  The turbocharger speed sensor harness must be tied away from any heat sources and hard or sharp surfaces. Failure to do so will cause damage to the harness.

CAUTION  Do not install cable ties directly over the sensor connector. Doing so can damage the connector. Tie the speed sensor wiring harness on either side of the connectors.

Push the connectors together until they lock. An audible click will be heard when the connector locks in place.

The connector must be fully mated.

Use cable ties to secure the harness to the turbocharger coolant drain line and EGR coolant return line.

Start the engine and verify with INSITE™ electronic service tool that the speed sensor is working properly.