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REPAIR MAINTENANCE OPERATION OF MOTOR VEHICLES
Jeep Grand Cherokee (from 1993 to 1999, the year of issue)

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Jeep Grand Cherokee
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Jeep
Grand Cherokee
Introduction
Adjustment and routine maintenance
The straight six-cylinder engine
The V8 engine
Procedure of the general and engine major repairs
Systems of cooling, heating and air conditioning
general information
Antifreeze - the general information
Check of functioning and thermostat replacement
Check of serviceability and replacement of the cooling fan and clutch his clutch
Check the operation and to replace the coolant temperature sensor
Removing and installing radiator and cooling system expansion tank
Check operation of the water pump
Removal and installation of the water pump
Check of an electric circuit and replacing the motor fan heater and air conditioner
Removal and installation of the unit heater fan
Removal and installation of assemblage of the control heater and air conditioner
Removing and installing heat exchanger heater
Check of serviceability and maintenance of heating systems and air-conditioning
Diagnosis of automatic temperature control (ATC) without removing it from the car
Removing and installing battery (accumulator) air conditioning system
Removal and installation of the air conditioning system compressor
Removal and installation of air conditioning condenser
Removal and installation of a calibrated nozzle tube
Removal and installation of evaporator air conditioning system
The power supply system and exhaust
The system of electric motor
Systems of decrease in toxicity of the fulfilled gases and engine management
Manual box of a gear change
Automatic Transmission
Transfer Case
Clutch and transmission line
Brakes
Suspension and steering
Body
The system of on-board electrical equipment
Controls and operation receptions
 


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Check the operation and to replace the coolant temperature sensor



Before proceeding with the procedure wait full cooling of the engine.

Coolant temperature measurement system consists of a temperature measuring device included in the instrument cluster and block temperature sensor mounted on the engine. Some models come with more than one sensor, however, for the temperature indication is used only one of them, usually electrical connector equipped with a single wire. Coolant temperature sensors, transmitting signals to a processor is usually equipped with two wires.

Location coolant temperature sensor on a 6-cylinder engine.

Location coolant temperature sensor on the engine V8 (the second is located to the right of the sensor transmits the information to the processor).

If the meter detects overheating, check the coolant level, then make sure of reliability of fastening of the contacts between the meter and the electrical switch. Check the condition of the fuses.

With the ignition and turn the starter control lamp should burn (check of serviceability of lamps).

If the lamp is not lit, or it is burned out or there is an open circuit. Check the circuit grounding wire between the lamp and the sensor with the ignition (not running for the safety of the engine). If the meter needle is deflected while the entire range of the scale, or the warning lamp lights up, replace the sensor.

Immediately after the engine warning lamp should go off and stay off before the engine overheating. Failure lamp off may be due to short-circuiting in the wire between the lamp and the sensor, sensor failure or a failure of the ignition. Make sure that the system is filled with the required type of cooler. Excessive amounts of water in the mixture may cause lowering the boiling point of the coolant to a value insufficient to activate the sensor.

If the sensor unit to be replaced, simply unscrew it from the engine and replace it with a new. The threaded portion of the new sensor with sealant. Before proceeding to the removal of a defective sensor, make sure that the engine is completely cooled down. When unscrewing the sensor inevitably occur slight loss of coolant - get ready for a gathering of a spilled liquid. After installing a new unit of the sensor, check the coolant level.





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Removing and installing radiator and cooling system expansion tank

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