Nissan Maxima Service and Repair Manual: Blower motor

Description

COMPONENT DESCRIPTION

Brush-less Motor

The blower motor utilizes a brush-less motor with a rotating magnet.

Quietness is improved over previous motors where the brush was the point of contact and the coil rotated.

Nissan Maxima. Brush-less Motor

Blower Motor Circuit

Nissan Maxima. Blower Motor Circuit

Component Function Check

1.CHECK OPERATION

  1. Warm up the engine.
  2. Operate the fan control dial. Check that the fan speed and indicator are switched for all fan speeds.

Diagnosis Procedure

1.CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT

  1. Using CONSULT, perform "SELF-DIAGNOSIS RESULTS" of HVAC.
  2. Check if any DTC No. is displayed in the self-diagnosis results.

NOTE: If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010.

2.CHECK WITH ACTIVE TEST OF CONSULT

  1. Using CONSULT, perform "HVAC TEST""ACTIVE TEST" of HVAC to check each output device. Refer to HAC-26, "CONSULT Function". NOTE: Perform the ACTIVE TEST after starting the engine because the compressor is operating.
  2. Check that the blower motor control signal changes according to each indicator signal.

NOTE: Perform the inspection of each output device after starting the engine because the compressor is operating.

3.CHECK FUSE

Check 15A fuses (Nos. 21 and 22).

4.CHECK POWER SUPPLY FOR BLOWER MOTOR

  1. Turn ignition switch OFF.
  2. Disconnect blower motor connector.
  3. Turn ignition switch ON.
  4. Check voltage between blower motor harness connector M31 terminal 4 and ground.

Nissan Maxima. CHECK POWER SUPPLY FOR BLOWER MOTOR

4 - Ground: Battery voltage

5.CHECK BLOWER MOTOR GROUND CIRCUIT

  1. Turn ignition switch OFF.
  2. Check continuity between blower motor harness connector M31 terminal 1 and ground.

Nissan Maxima. CHECK BLOWER MOTOR GROUND CIRCUIT

1 - Ground: Continuity should exist.

6.CHECK BLOWER MOTOR CIRCUIT CONTINUITY

  1. Disconnect A/C auto amp. connector.
  2. Check continuity between blower motor harness connector M31 (A) terminal 3 and A/C auto amp. harness connector M37 (B) terminal 32.

Nissan Maxima. CHECK BLOWER MOTOR CIRCUIT CONTINUITY

3 - 32: Continuity should exist.

7.CHECK A/C AUTO AMP. OUTPUT SIGNAL

Nissan Maxima. CHECK A/C AUTO AMP. OUTPUT SIGNAL

  1. Reconnect blower motor connector and A/C auto amp. connector.
  2. Turn ignition switch ON.
  3. Set MODE switch to the VENT position.
  4. Check the output waveform between blower motor harness connector M31 terminal 3 and ground using an oscilloscope, while varying the fan speed from 1 to 7.

8.REPLACE FUSES

  1. Replace fuses.
  2. Activate the blower motor.

9.CHECK BLOWER MOTOR POWER SUPPLY CIRCUIT FOR SHORT

  1. Turn ignition switch OFF.
  2. Disconnect blower motor harness connector.
  3. Check continuity between blower motor harness connector M31 terminal 4 and ground.

Nissan Maxima. CHECK BLOWER MOTOR POWER SUPPLY CIRCUIT FOR SHORT

4 - Ground: Continuity should not exist.

10.CHECK POWER SUPPLY OF THE FRONT BLOWER MOTOR RELAY

  1. Turn the ignition switch OFF.
  2. Remove the front blower motor relay.
  3. Turn the ignition switch ON.
  4. Check the voltage between front blower motor relay harness connector J-4 terminals 2, 3 and ground.

2, 3 - Ground: Battery voltage

11.CHECK FRONT BLOWER MOTOR RELAY GROUND CIRCUIT

  1. Turn ignition switch OFF.
  2. Check continuity between front blower motor relay harness connector J-4 terminal 1 and ground.

1 - Ground: Continuity should exist.

12.CHECK BLOWER MOTOR SUPPLY CIRCUIT FOR OPEN

Check continuity between blower motor harness connector M31 terminal 4 and front blower motor relay harness connector J-4 terminal 5.

5 - 4: Continuity should exist.

    B263D, B263E, B263f intake door motor
    Description COMPONENT DESCRIPTION Intake Door Motor The intake door motor (1) is attached to the blower unit. It rotates so that air is drawn from inlets set by the A/C auto amp. Motor ...

    Magnet clutch
    Description SYSTEM DESCRIPTION A/C auto amp. controls A/C compressor operation by ambient temperature and signal from ECM. Low Temperature Protection Control A/C auto amp. will turn the A/ ...

    Other materials:

    P0420, P0430 three way catalyst function
    DTC Logic DTC DETECTION LOGIC The ECM monitors the switching frequency ratio of air fuel ratio (A/F) sensor 1 and heated oxygen sensor 2. A three way catalyst (manifold) with high oxygen storage capacity will indicate a low switching frequency of heated oxygen sensor 2. As oxygen sto ...

    Power window serial link
    POWER WINDOW MAIN SWITCH POWER WINDOW MAIN SWITCH : Description Main power window and door lock/unlock switch, power window and door lock/unlock switch RH and BCM communicate via the power window serial link. The keyless power window down signal is transmitted from BCM to main power ...

    Door switch
    Description Detects door open/close condition. Component Function Check 1.CHECK FUNCTION With CONSULT Check door switches DOOR SW-DR, DOOR SW-AS in Data Monitor mode with CONSULT. Diagnosis Procedure 1.CHECK DOOR SWITCH INPUT SIGNAL Turn ignition switch OFF. Check signal between BCM c ...

    Nissan Maxima Owners Manual

    Nissan Maxima Service and Repair Manual

    © 2017-2021 Copyright www.nimainfo.com
    0.0103