Engine Coolant Temperature Sensor Check
ENGINE COOLANT TEMPERATURE SENSOR CHECKRequired Special Tools:
- MB992042: Engine coolant temperature sensor wrench
CAUTION: Be careful not to touch the connector (resin section) with the tool when removing and installing.
1. Drain engine coolant, then remove the engine coolant temperature sensor using the special tool MB992042 (engine coolant temperature sensor wrench).
2. With the temperature sensing portion of engine coolant temperature sensor immersed in hot water, check the resistance.
Standard value:
14 - 17 kohms [at -20 °C (-4 °F)]
5.1 - 6.5 kohms [at 0 °C (32 °F)]
2.1 - 2.7 kohms [at 20 °C (68 °F)]
0.9 - 1.3 kohms [at 40 °C (104 °F)]
0.48 - 0.68 kohms [at 60 °C (140 °F)]
0.26 - 0.36 kohms [at 80 °C (176 °F)]
3. If the resistance deviates from the standard value greatly, replace the sensor.
4. Apply LOCTITE 262, Three bond 1324N or equivalent to threaded portion.
5. With the special tool MB992042 (engine coolant temperature sensor wrench) tighten the engine coolant temperature sensor to the specified torque.
Tightening torque: 30 ± 9 N.m (22 ± 6 ft-lb)