ENGINE COOLANT TEMPERATURE SENSOR CHECK

1.Remove the engine coolant temperature sensor using the special tool engine coolant temperature sensor wrench (MB992042).

2.With temperature sensing portion of engine coolant temperature sensor immersed in hot water, check resistance. Standard value: 14 - 17 kΩ (at -20°C) 5.1 - 6.5 kΩ (at 0°C) 2.1 - 2.7 kΩ (at 20°C) 0.9 - 1.3 kΩ (at 40°C) 0.48 - 0.68 kΩ (at 60°C) 0.26 - 0.36 kΩ (at 80°C) 3.If the resistance deviates from the standard value greatly, replace the sensor.

4.Apply sealant to threaded portion. Specified sealant: 3M NUT Locking Part No. 4171 or equivalent 5.Tighten the engine coolant temperature sensor to the specified torque using the special tool engine coolant temperature sensor wrench (MB992042). Tightening torque: 29 ± 10 N·m