Nissan Maxima QX

1. At refusal or violation of serviceability of functioning of the fan of a heater first of all check a state and reliability of fastening of all terminal connections of the corresponding electric chain. Make sure of completeness of a charge of the battery. Estimate a condition of the corresponding safety lock, the relay, switch. Also the probability of failure of a driving electric motor is not excluded.
2. Before starting check actually of an electric motor surely estimate a condition of a safety lock and the relay (if that is provided) (see the Head Onboard electric equipment).
3. For the purpose of ensuring access to a casing of a heater and ventilatory assembly remove a ware box and the lower section of finishing of the dashboard (see the Head Kuzov).

4. Turn the ignition key in position of ON and transfer the switch of control of the heater fan to negative situation. Check of serviceability of giving of food on an electric motor requires a lamp sampler or the voltmeter. If tension moves regularly, it is necessary to check a condition of a chain of grounding of the motor (on the considered models the switch of management and resistor assembly are a part of a chain of grounding). Also the probability of jamming of a krylchatka is not excluded.

5. For quality check of grounding disconnect an electrical wiring from an electric motor and connect a wire crossing point between the plug of grounding of the motor and reliable weight. The second wire crossing point connect positive plugs of the motor and the battery. If the fan begins to rotate regularly, follows violation of quality of grounding takes place, or resistor assembly failed. Otherwise it is necessary to replace the motor, or to remove the cause of jamming of a krylchatka.
6. For identification of the reasons of jamming of a krylchatka remove assembly of an electric motor (see the Section Removal and installation of an electric motor of the drive of the fan of a heater).

7. At violation of quality of grounding check serviceability of a condition of the resistor assembly located in a casing in the neighbourhood with an electric motor.

8. By means of an ohmmeter check quality of grounding of resistor assembly in various provisions of the switch of management, - in each of provisions (except OFF) conductivity has to take place between three plugs from six.
9. In case of identification of violations it is necessary to make the corresponding recovery repair of the switch or an electrical wiring of the chain going to it.
10. If grounding is correct, check resistor assembly for existence of conductivity between plugs. in case of identification of break replace the resistor.
11. The description of procedures of check of functioning of a pereklchyuatel of the choice of the high-speed modes of the fan see in the Section Removal and installation of assembly of the control panel of functioning of a heater and the conditioner of air, adjustment of a driving cable. For the purpose of ensuring access take the control panel of functioning of the heater/conditioner of air from "Torpedo".
12. Disconnect an electrical wiring and by means of an ohmmeter check correctness of distribution of conductivity between plugs of the socket of a pereklchyuatel.

13. In case of identification of violations replace the switch.