CM850 Electronic Control System – 019-017   Engine Coolant Level Sensor

WARNING  Do not remove the pressure cap from a hot engine. Wait until the coolant temperature is below 50°C [120°F] before removing the pressure cap. Heated coolant spray or steam can cause personal injury.

WARNING  Coolant is toxic. Keep away from children and pets. If not reused, dispose of in accordance with local environmental regulations.

Remove the radiator cap.

Drain enough coolant from the cooling system to empty the radiator top tank. Refer to Procedure 008-018 in the Troubleshooting and Repair Manual, ISC, QSC8.3, ISL and QSL9 Engines, Bulletin 4021418 or Troubleshooting Repair Manual, ISB^e, ISB, and QSB5.9 (Common Rail Fuel System), Bulletin 4021271.

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

Remove the sensor.

Install and tighten the new sensor according to the vehicle manufacturer’s procedures.

Push the electrical connectors together until they lock.

Fill the cooling system and check for leaks. Refer to Procedure 008-018 in the Troubleshooting and Repair Manual, ISC, QSC8.3, ISL and QSL9 Engines, Bulletin 4021418 or Troubleshooting Repair Manual, ISB^e, ISB, and QSB5.9 (Common Rail Fuel System), Bulletin 4021271.