Nissan Rogue (T33) 2021-Present Service Manual: U1caa-02 Mode Door Motor

Nissan Rogue (T33) 2021-Present Service Manual / Ventilation, Heater & Air Conditioner :: Heater & Air Conditioning Control System / Automatic Air Conditioning :: Dtc/circuit Diagnosis / U1caa-02 Mode Door Motor

DTC Description

DTC DETECTION LOGIC

DTC No.

CONSULT screen terms

(Trouble diagnosis content) 		DTC detection condition
U1CAA-02

Mode door motor

(Mode door motor) 		Diagnosis condition Ignition switch ON
Signal (Terminal) LIN (door motor) signal
Threshold A/C amp. is not transmitting or receiving LIN communication with mode door motor
Diagnosis delay time 2 second or more

POSSIBLE CAUSE

  • Harness and connector (mode door motor circuit is open or shorted to ground)

  • Mode door motor

  • A/C amp.

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

  1. Start the engine.

  2. Select “Self diagnosis result” mode of “HVAC”.

  3. Check DTC.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

CHECK MODE DOOR MOTOR POWER SUPPLY

  1. Ignition switch ON.

  2. Check voltage between mode door motor harness connector and A/C amp. harness connector.

(+) (−) Voltage
Mode door motor A/C amp.
Connector Terminal Connector Terminal
M143 1 M55 58 Battery voltage

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

GO TO 4.

CHECK MODE DOOR MOTOR GROUND CIRCUIT FOR OPEN

  1. Ignition switch OFF.

  2. Disconnect mode door motor connector and A/C amp. connector.

  3. Check continuity between mode door motor harness connector and A/C amp. harness connector.

    Mode door motor A/C amp. Continuity
    Connector Terminal Connector Terminal
    M143 2 M54 27 Yes

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair harness or connector.

CHECK MODE DOOR MOTOR LIN SIGNAL CIRCUIT

  1. Connect mode door motor connector and A/C amp. connector.

  2. Ignition switch ON.

  3. Confirm output waveform between mode door motor harness connector and A/C amp. harness connector with oscilloscope.

    (+) (−) Output waveform
    Mode door motor A/C amp.
    Connector Terminal Connector Terminal
    M143 3 M55 58

Is the inspection result normal?

YES>>

Replace mode door motor. Refer to Removal and Installation.

NO>>

GO TO 6.

CHECK MODE DOOR MOTOR POWER SUPPLY CIRCUIT FOR OPEN

  1. Ignition switch OFF.

  2. Disconnect mode door motor connector and A/C amp. connector.

  3. Check continuity between mode door motor harness connector and A/C amp. harness connector.

    Mode door motor A/C amp. Continuity
    Connector Terminal Connector Terminal
    M143 1 M54 1 Yes

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Repair harness or connector.

CHECK MODE DOOR MOTOR POWER SUPPLY CIRCUIT FOR SHORT

  1. Disconnect following connectors.

    • Air mix door motor LH

    • Air mix door motor RH

    • Air mix door motor (rear)

    • Intake door motor

  2. Check continuity between mode door motor harness connector and ground.

    Mode door motor (—) Continuity
    Connector Terminal
    M143 1 Ground No

Is the inspection result normal?

YES>>

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

NO>>

Repair harness or connector.

CHECK MODE DOOR MOTOR LIN SIGNAL CIRCUIT FOR OPEN

  1. Ignition switch OFF.

  2. Disconnect mode door motor connector and A/C amp. connector.

  3. Check continuity between mode door motor harness connector and A/C amp. harness connector.

    Mode door motor A/C amp. Continuity
    Connector Terminal Connector Terminal
    M143 3 M54 2 Yes

Is the inspection result normal?

YES>>

GO TO 7.

NO>>

Repair harness or connector.

CHECK MODE DOOR MOTOR LIN SIGNAL CIRCUIT FOR SHORT

  1. Disconnect following connectors.

    • Air mix door motor LH

    • Air mix door motor RH

    • Air mix door motor (rear)

    • Intake door motor

  2. Check continuity between mode door motor harness connector and ground.

    Mode door motor (—) Continuity
    Connector Terminal
    M143 3 Ground No

Is the inspection result normal?

YES>>

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

NO>>

Repair harness or connector.

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