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
+ Power supply system and release
+ Engine electric equipment
- Control systems of the engine
   General information
   System of onboard diagnostics (OBD) - the principle of functioning and codes of malfunctions
   Removal and RSM installation
   Check of serviceability of a state, replacement and adjustment of the sensor of provision of a butterfly valve (TPS)
   Check of a state and replacement of the sensor of measurement of mass of an air stream (MAF)
   Check of a state and replacement of the sensor of absolute pressure in the pipeline (MAR)
   Check of a state and replacement of the sensor of temperature of the soaked-up air (IAT)
   Check of a state and replacement of the sensor of temperature of cooling liquid of the engine (EST)
   Check of a state and replacement of the sensor of provision of a bent shaft (ICR)
   Check of a state and replacement of the sensor of position of the camshaft (SMR)
   Check of a state and replacement of the sensor switch of pressure in system of hydrostrengthening of a wheel (PSP)
   Check of a state and replacement of the oxygen sensor (l-probe)
   Check of a state and replacement of the sensor of a detonation
   Check of a state and replacement of the sensor of temperature of fuel of speed of the movement of the car (VSS)
   Check of a state and replacement of the sensor of speed of the movement of the car (VSS)
   Check of a state and replacement of components of system of stabilization of turns of idling
   Control system of functioning of the power valve
   System of the operated ventilation of a case (PCV)
   System of recirculation of the fulfilled gases (EGR) - the general information, check of a state and replacement of components
   System of catching of fuel evaporations (EVAP) - the general information, check of a state and replacement of components
   The catalytic converter - the general information, check of a state and replacement
+ Transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment

Check of a state and replacement of the sensor of temperature of the soaked-up air (IAT)

The IAT sensor represents a thermistor (the resistor which resistance depends temperatures). The sensor is installed in an inlet air duct and serves for determination of temperature of the air which is soaked up in the engine. Change of resistance involves change of amplitude of alarm tension of the sensor, and, than temperature, subjects BELOW resistance and vice versa is HIGHER. RSM uses information issued by the sensor at thin adjustments of a dosage of air-fuel mix. Refusals of sensor/violation in its electric chain lead to record in memory of system of self-diagnostics of the corresponding code of malfunction (see the Section System of Onboard Diagnostics (OBD) - the principle of functioning and codes of malfunctions).

CHECK

 PERFORMANCE ORDER

 Implementation of the procedure described below can lead to entering in memory of OBD of malfunction which will be highlighted by a control lamp "Check the engine". Upon completion of check and the corresponding recovery repair do not forget to clear memory of system (see the Section System of Onboard Diagnostics (OBD) - the principle of functioning and codes of malfunctions).

1. Before starting directly assessment of a condition of the sensor, make sure of serviceability of giving of food on it from RSM and in lack of signs of violations of grounding. Disconnect an electrical wiring from the IAT sensor and connect the voltmeter to two plugs of the socket from a plait. Include ignition (the engine do not start), - the measuring instrument has to issue the indication 5.0 B, otherwise check a condition of an electrical wiring on the site of a chain between the sensor and RSM. If a chain as it should be, drive away the car on car repair shop for performing diagnostics of a condition of RSM and performance of the corresponding recovery repair.
2. At the switched-off ignition disconnect an electrical wiring from the IAT sensor and by means of an ohmmeter measure resistance between two plugs of the socket of the sensor at the cold engine. Restore initial connection of an electrical wiring, start the engine and warm up it up to the normal working temperature. Again disunite the socket and repeat measurement of resistance. Compare results of two measurements to the schedule of temperature dependence of the sensor. The faulty sensor is subject to replacement.

 Thinner check of a condition of the IAT sensor can be made out of the car and creation of the full schedule of temperature dependence by lowering in the water which is warmed up on fire.

REPLACEMENT

 PERFORMANCE ORDER

1. Disconnect an electrical wiring from the IAT sensor.
2. Take the sensor from an inlet air duct (try not to damage plastic components).
3. Installation is made upside-down.