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1.Remove the engine coolant
temperature sensor using the special tool engine coolant
temperature sensor wrench (MB992042).
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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 the sealant over the screw
sections on the engine coolant temperature
sensor. Specified sealant: 3M Nut Locking Part
No. 4171 or equivalent 5.Tighten the
engine coolant temperature sensor to the specified torque,
using coolant temperature sensor wrench, special tool
(MB992042). Tightening torque: 36 ± 6
N·m
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