Nissan Rogue (T33) 2021-Present Service Manual: 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
-
Start the engine.
-
Select “Self diagnosis result” mode of “HVAC”.
-
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
-
Ignition switch ON.
-
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
-
Ignition switch OFF.
-
Disconnect mode door motor connector and A/C amp. connector.
-
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
-
Connect mode door motor connector and A/C amp. connector.
-
Ignition switch ON.
-
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
-
Ignition switch OFF.
-
Disconnect mode door motor connector and A/C amp. connector.
-
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
-
Disconnect following connectors.
-
Air mix door motor LH
-
Air mix door motor RH
-
Air mix door motor (rear)
-
Intake door motor
-
-
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
-
Ignition switch OFF.
-
Disconnect mode door motor connector and A/C amp. connector.
-
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
-
Disconnect following connectors.
-
Air mix door motor LH
-
Air mix door motor RH
-
Air mix door motor (rear)
-
Intake door motor
-
-
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.
Other materials:
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DTC detection condition
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