Jeep Grand Cherokee

1993-1999 of release

Repair and car operation

Check of functioning and replacement of the block of the sensor of temperature of a cooler

Before starting performance of procedure wait complete cooling of the engine.

The system of measurement of temperature of a cooler consists of the measuring instrument of temperature entering into a combination of devices and the block of the sensor of temperature, established on the engine. Some models are equipped more than one sensor, however for indication of temperature uses only one of them, usually equipped with the single-wire electric socket. Sensors of temperature of the cooler, transmitting signals on the processor are usually equipped with two wires.

Location of the sensor of temperature of a cooler on the 6-cylinder engine.

Location of the sensor of temperature of a cooler on the V8 engine (the second sensor located more to the right hands over information on the processor).

In case the measuring instrument fixes an overheat, check cooler level, then make sure of reliability of fastening of contacts of electroconducting between a measuring instrument and the switch. Check a condition of safety locks.

At the included ignition and a turned starter the control lamp should burn (check of serviceability of a lamp).

If the lamp does not burn, or it fused, or contour break takes place. Check a contour, having earthed a wire between a lamp and the sensor at the included ignition (but without starting for safety the engine). If the arrow of a measuring instrument deviates thus on all range of a scale, or the control lamp lights up, replace the sensor.

Right after engine start the control lamp should go out and remain switched off before emergence of an overheat of the engine. Refusal of switching off of a lamp can occur owing to a zakorachivaniye on mass of a wire between a lamp and the sensor, malfunctions of the sensor or failure of the lock of ignition. Make sure that the system is filled with a cooler of demanded type. The excessive quantity of water in a mix can be at the bottom of decrease in a boiling point of a cooler to value of the sensor insufficient for activation.

If the block of the sensor is subject to replacement, simply unscrew it from the engine and screw on its place the new. A carving part of the new sensor grease with hermetic. Before starting removal of the defective sensor make sure that the engine completely cooled down. At a sensor vyvinchivaniye inevitably there will be insignificant losses of a cooler - be ready to collecting spilled liquid. After installation of the new block of the sensor check cooler level.