Nissan Maxima QX

since 1993 release

Repair and operation of the car



Nissan Maxima QX
+ Cars of the Nissan Maxima brand
+ Maintenance instruction
+ Settings and routine maintenance
+ Engine
- Cooling systems, heating
   General information
   Antifreeze - general information
   Check of serviceability of functioning and replacement of the thermostat
   Check of a condition of fans of the cooling system and chains of their inclusion, replacement of components
   Removal and installation of a radiator and expanded tank of the cooling system
   Check of a state and replacement of the water pump
   Check of serviceability of functioning and replacement of the block of the sensor of the measuring instrument of temperature of cooling liquid
   Check of serviceability of functioning of a driving electric motor of the fan of a heater and condition of components of its electric chain, …
   Removal and installation of an electric motor of the drive of the fan of a heater
   Removal and installation of assembly of the control panel of functioning of a heater and conditioner of air, adjustment of a driving cable
   Removal and installation of the heat exchanger of a heater
   Check of serviceability of functioning and service of systems of heating and air conditioning
   Removal and installation of a receiver dehumidifier To/in
   Removal, service and installation of the K/V compressor
   Removal and installation of the K/V condenser
+ Power supply system and release
+ Engine electric equipment
+ Control systems of the engine
+ Transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment



Check of serviceability of functioning and replacement of the block of the sensor of the measuring instrument of temperature of cooling liquid

Start implementation of the procedure only after full cooling of the engine! See also preventions at the beginning of the Section Antifreeze - general information. Remember that at the included ignition the fan of the cooling system can work even at the killed engine.

CHECK

 PERFORMANCE ORDER

1. The system of indication of temperature of cooling liquid consists of the measuring instrument which is built in in an instrument guard and the information sensor placed on the engine. On the car several CTS sensors are provided, however, in system of indication only one of them is used.

2. If at unambiguously cold engine the measuring instrument fixes an overheat, check an electrical wiring on the site of a chain between an instrument guard and the block of the sensor for existence of signs of short circuit on weight.
3. If the measuring instrument does not function at all (the arrow remains motionless even after 10-minute warming up of the engine) at serviceable safety locks, kill the engine and disconnect an electrical wiring from temperature sensor. By means of a wire crossing point close a sensor wire on weight. For a short time include ignition, without starting the engine. If the arrow of the indicator deviates until the end of a scale, replace the sensor.
4. For check of the sensor disconnect from it an electrical wiring and connect an ohmmeter between the probe in the top part of the sensor and the mass of the power unit. At slightly heated-up engine (about 60 °C) the indication of an ohmmeter has to make about 70 ÷ of 90 Ohms for models till 1998 of the issue and 170 ÷ 200 Ohms for models of 1999 of the issue. After warming up of the engine up to the temperature of 100 °C instrument reading has to fall to value (21 ÷ 24) / (47 ÷ 53) Ohm respectively, otherwise replace temperature sensor.

REPLACEMENT

 PERFORMANCE ORDER

Turn out the sensor from the engine (prepare for collecting the spilled liquid) and quickly establish on its place new which carving previously grease with conducting sealant (not a teflon tape or the film FUM). In conclusion check the level of cooling liquid.