Nissan Sentra B18 (2020-2025) Service Manual: Mode Door Motor

Nissan Sentra B18 (2020-2025) Service Manual / Ventilation, Heater & Air Conditioner / Heater & Air Conditioning Control System :: Manual Air Conditioner / Dtc/circuit Diagnosis / Mode Door Motor

Diagnosis Procedure

Diagnosis Procedure

CHECK MODE DOOR MOTOR POWER SUPPLY

Ignition switch ON.

Check voltage between mode door motor harness connector and ground.

+	–	Voltage (Approx.)
M166	1	Ground	Battery voltage

–

Voltage

(Approx.)

Mode door motor

Connector

Terminal

M166

Ground

Battery voltage

Is the inspection result normal?

YES >>

GO TO 2.

NO >>

GO TO 5.

CHECK MODE DOOR MOTOR GROUND CIRCUIT

Ignition switch OFF.
Disconnect mode door motor connector and A/C amp. connector.

Check continuity between mode door motor harness connector and ground.

Mode door motor		—		Continuity
Connector	Terminal	—		Continuity
M166	2	Ground		Yes

Is the inspection result normal?

YES >>

GO TO 3.

NO >>

Repair harness or connector.

CHECK MODE DOOR MOTOR LIN SIGNAL

Connect mode door motor connector and A/C amp. connector.
Ignition switch ON.

Confirm output waveform between mode door motor harness connector and ground using oscilloscope.

+		—
Mode door motor
Connector	Terminal
M166	3	Ground

Is the inspection result normal?

YES >>

GO TO 4.

NO >>

GO TO 6.

CHECK INSTALLATION OF MODE DOOR MOTOR
1. Check mode door motor is properly installed. Refer to Exploded View.
Is the inspection result normal?
YES >>
Replace mode door motor. Refer to Removal and Installation.
NO >>
Repair or replace malfunctioning part.

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. connector.

Mode door motor		A/C amp.		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M166	1	M81	1	Yes

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	Continuity
M166	3	M81	22	Yes

Is the inspection result normal?

YES >>

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

NO >>

Repair harness or connector.

Door Motor Circuit

Diagnosis Procedure Diagnosis Procedure Note: If all of door motor DTCs are detected, check this circuit. CHECK DOOR MOTOR POWER SUPPLY ...

Other materials:

Removal and Installation
Removal and Installation REMOVAL If necessary, remove instrument lower panel LH. Refer to Removal and Installation. Using a suitable tool, release clutch master cylinder rod end (A) from clutch pedal. Remove bolts (B) from clutch pedal (1). Using a suitable tool, ...

Steering gear and linkage
Exploded View REMOVAL Steering gear assembly Front suspension member Front Removal and Installation REMOVAL Set steering wheel to the straight-ahead position. Remove floor cover (1). Lower shaft assembly (2). Remove the lower shaft assembly bo ...

Dtc Diagnosis Procedure
DTC Diagnosis Procedure Note: The Signal Tech II Tool [– (NI-50190)] can be used to perform the following functions: Refer to the Signal Tech II User Guide for additional information. Activate and display TPMS sensor IDs Display tire pressure reported ...