CM850 Electronic Control System – 019-445   Crankcase Pressure Sensor

NOTE: This procedure applies to the ISL engine in Recreational Vehicle applications
only.

The crankcase pressure sensor is used to monitor the pressure in the crankcase.

The crankcase pressure sensor is located on top of the rocker lever cover.

Clean the area around the crankcase pressure sensor.

Disconnect the pressure sensor connector from the engine harness.

Remove the mounting capscrew.

Remove the sensor from the engine by pulling straight up on the sensor. Be careful
not to damage the o-ring seal when removing the sensor.

Inspect the engine harness connector and the crankcase pressure sensor for the following:

• loose connector
• corroded pins
• bent or broken pins
• pushed back or expanded pins
• moisture in or on the connector
• missing or damaged connector seals
• dirt or debris in or on the connector pins
• connector shell broken
• wire insulation damage
• damaged connector locking tab.

Inspect the crankcase pressure sensor for the following:

• swollen o-ring
• nicks or cuts in or on the o-ring.

Lubricate the o-ring with clean engine oil before installation.

Install the crankcase pressure sensor by pressing firmly on the top of the sensor until the o-ring is fully seated.

Install and tighten the mounting capscrew.

Connect the engine harness to the crankcase pressure sensor.

Start the engine and check for leaks.

Shut off the engine.

Connect INSITE™ electronic service tool.

Operate the engine and check for fault codes.