Nissan Rogue (T33) 2021-Present Service Manual: Front Blower Motor

Nissan Rogue (T33) 2021-Present Service Manual / Ventilation, Heater & Air Conditioner :: Heater & Air Conditioning Control System / Automatic Air Conditioning :: Dtc/circuit Diagnosis / Front Blower Motor

Diagnosis Procedure

CHECK FUSE

  1. Ignition switch OFF.

  2. Check that the following fusible link are not blown (open).

    Unit Location Fuse No. Capacity
    Front blower motor Fuse block (J/B) LL 40 A

Is the fuses blown (open)?

YES>>

Replace the blown (open) fusible link after repairing the affected circuit if a fusible link are blown (open).

NO>>

GO TO 2.

CHECK FRONT BLOWER MOTOR POWER SUPPLY

  1. Disconnect the front blower motor connector.

  2. Ignition switch ON.

  3. Check voltage between front blower motor harness connector and ground.

    (+) (−) Voltage
    Front blower motor
    Connector Terminal
    M144 2 Ground Battery voltage

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

GO TO 3.

CHECK FRONT BLOWER MOTOR POWER SUPPLY CIRCUIT FOR OPEN

  1. Ignition switch OFF.

  2. Disconnect fuse block (J/B) harness connector.

  3. Check continuity between fuse block (J/B) harness connector and front blower motor harness connector.

    Fuse block (J/B) Front blower motor Continuity
    Connector Terminal Connector Terminal
    M33 1A M144 2 Yes

Is the inspection result normal?

YES>>

Repair the front blower motor power supply circuit.

NO>>

Repair the harnesses or connectors.

CHECK FRONT BLOWER MOTOR GROUND CIRCUIT FOR OPEN

  1. Ignition switch OFF.

  2. Check continuity between front blower motor harness connector and ground.

    Front blower motor (—) Continuity
    Connector Terminal
    M144 4 Ground Yes

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Repair the harnesses or connectors.

CHECK FRONT BLOWER MOTOR CONTROL SIGNAL

  1. Connect front blower motor connector.

  2. Ignition switch ON.

  3. Check duty ratios between front blower motor harness connector and ground by using an oscilloscope.

    (+) (−) Condition Output waveform
    Front blower motor
    Connector Terminal
    M144 1 Ground Front blower motor: OFF Battery voltage
    Front blower motor: 1st speed (manual)

    Front blower motor: 7th speed (manual)

Is the inspection result normal?

YES>>

Replace front blower motor. Refer to Removal and Installation.

NO>>

GO TO 6.

CHECK FRONT BLOWER MOTOR CONTROL SIGNAL CIRCUIT FOR OPEN

  1. Ignition switch OFF.

  2. Disconnect front blower motor connector and A/C amp. connector.

  3. Check continuity between front blower motor harness connector and A/C amp. harness connector.

    Front blower motor A/C amp. Continuity
    Connector Terminal Connector Terminal
    M144 1 M54 34 Yes

Is the inspection result normal?

YES>>

GO TO 7.

NO>>

Repair the harnesses or connectors.

REPLACE FRONT BLOWER MOTOR

  1. Replace front blower motor. Refer to Removal and Installation.

  2. Ignition switch ON.

  3. Change fan speed from 1st – 7th, and check that front blower motor operates normally.

Is the inspection result normal?

YES>>

Inspection End.

NO>>

Replace the A/C amp. Refer to Removal and Installation.

Component Inspection (Front Blower Motor)

CHECK FRONT BLOWER MOTOR-I

  1. Remove front blower motor. Refer to Removal and Installation.

  2. Check that there is not any mixing foreign object in the front blower motor.

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Replace front blower motor. Refer to Removal and Installation.

CHECK FRONT BLOWER MOTOR-II

Check that there is not breakage or damage in the front blower motor.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Replace front blower motor. Refer to Removal and Installation.

CHECK FRONT BLOWER MOTOR-III

Check that front blower motor turns smoothly.

Is the inspection result normal?

YES>>

Inspection End.

NO>>

Replace front blower motor. Refer to Removal and Installation.

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