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 / Manual 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.

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 air mix door motor connector and intake door motor connector.

  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 air mix door motor connector and intake door motor connector.

  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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