Nissan Sentra B18 (2020-2025) Service Manual / Body Exterior, Doors, Roof & Vehicle Security / Door & Lock :: Dtc/circuit Diagnosis / Door Lock Actuator

Nissan Sentra B18 (2020-2025) Service Manual: Door Lock Actuator

Driver Side

Component Function Check

Component Function Check

CHECK FUNCTION
1. CONSULT
  1. Select "DOOR LOCK" in "Active Test" mode of "BCM(DOOR LOCK)".
  2. Select “ALL LOCK” or “ALL UNLK” to check that it works normally.
Is the inspection result normal?
YES>>
Door lock actuator is OK.
NO>>
Refer to Diagnosis Procedure.

Diagnosis Procedure

Diagnosis Procedure

CHECK DOOR LOCK ACTUATOR INPUT SIGNAL

Ignition switch OFF.
Disconnect front door lock assembly LH connector.

Check voltage between front door lock assembly LH harness connector and ground.

(+)		(–)	Condition		Voltage (Approx.)
Front door lock assembly LH
Connector	Terminal
D9	1	Ground	Door lock and unlock switch	Unlock	Battery voltage
D9	2	Ground	Door lock and unlock switch	Lock	Battery voltage

Is the inspection result normal?

YES >>

Replace front door lock assembly LH. Refer to Removal and Installation.

NO >>

GO TO 2.

CHECK DOOR LOCK ACTUATOR CIRCUIT

Disconnect BCM connector and all door lock actuators connectors.

Check continuity between BCM harness connector and front door lock assembly LH harness connector.

BCM		Front door lock assembly LH		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M20	134	D9	1	Yes
M20	142	D9	2	Yes

Check continuity between BCM harness connector and ground.

BCM		—	Continuity
Connector	Terminal	—	Continuity
M20	134	Ground	No
M20	142	Ground	No

Is the inspection result normal?

YES >>

GO TO 3.

NO >>

Repair or replace harness.

CHECK BCM OUTPUT SIGNAL

Connect BCM connector.

Check voltage between BCM harness connector and ground.

(+)		(–)	Condition		Voltage (Approx.)
BCM
Connector	Terminal
M20	134	Ground	Door lock and unlock switch	Unlock	Battery voltage
M20	142	Ground	Door lock and unlock switch	Lock	Battery voltage

Is the inspection result normal?

YES >>

Check for internal short of each door lock actuator.

NO >>

Replace BCM. Refer to Removal and Installation.

Passenger Side

Component Function Check

Component Function Check

CHECK FUNCTION
1. CONSULT
  1. Select "DOOR LOCK" in "Active Test" mode of "BCM(DOOR LOCK)".
  2. Select “ALL LOCK” or “ALL UNLK” to check that it works normally.
Is the inspection result normal?
YES>>
Door lock actuator is OK.
NO>>
Refer to Diagnosis Procedure.

Diagnosis Procedure

Diagnosis Procedure

CHECK DOOR LOCK ACTUATOR INPUT SIGNAL

Ignition switch OFF.
Disconnect front door lock actuator RH connector.

Check voltage between front door lock actuator RH harness connector and ground.

(+)		(–)	Condition		Voltage (Approx.)
Front door lock actuator RH
Connector	Terminal
D107	3	Ground	Door lock and unlock switch	Unlock	Battery voltage
D107	4	Ground	Door lock and unlock switch	Lock	Battery voltage

Is the inspection result normal?

YES >>

Replace front door lock actuator RH. Refer to Removal and Installation.

NO >>

GO TO 2.

CHECK DOOR LOCK ACTUATOR CIRCUIT

Disconnect BCM connector and all door lock actuators connectors.

Check continuity between BCM harness connector and front door lock actuator RH harness connector.

BCM		Front door lock actuator RH		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M20	132	D107	3	Yes
M20	142	D107	4	Yes

Check continuity between BCM harness connector and ground.

BCM		—	Continuity
Connector	Terminal	—	Continuity
M20	132	Ground	No
M20	142	Ground	No

Is the inspection result normal?

YES >>

GO TO 3.

NO >>

Repair or replace harness.

CHECK BCM OUTPUT SIGNAL

Connect BCM connector.
Check voltage between BCM harness connector and ground.

(+)		(–)	Condition		Voltage (Approx.)
BCM
Connector	Terminal
M20	132	Ground	Door lock and unlock switch	Unlock	Battery voltage
M20	142	Ground	Door lock and unlock switch	Lock	Battery voltage

Is the inspection result normal?

YES >>

Check for internal short of each door lock actuator.

NO >>

Replace BCM. Refer to Removal and Installation.

Rear Lh

Component Function Check

Component Function Check

CHECK FUNCTION
1. CONSULT
  1. Select "DOOR LOCK" in "Active Test" mode of "BCM(DOOR LOCK)".
  2. Select “ALL LOCK” or “ALL UNLK” to check that it works normally.
Is the inspection result normal?
YES >>
Door lock actuator is OK.
NO >>
Refer to Diagnosis Procedure.

Diagnosis Procedure

Diagnosis Procedure

CHECK DOOR LOCK ACTUATOR INPUT SIGNAL

Ignition switch OFF.
Disconnect rear door lock actuator LH connector.
Check voltage between rear door lock actuator LH harness connector and ground.

(+)		(–)	Condition		Voltage (Approx.)
Rear door lock actuator LH
Connector	Terminal
D202	1	Ground	Door lock and unlock switch	Unlock	Battery voltage
D202	2	Ground	Door lock and unlock switch	Lock	Battery voltage

Is the inspection result normal?

YES >>

Replace rear door lock actuator LH. Refer to Removal and Installation.

NO >>

GO TO 2.

CHECK DOOR LOCK ACTUATOR CIRCUIT

Disconnect BCM connector and rear door lock actuators connectors.

Check continuity between BCM harness connector and rear door lock actuator LH harness connector.

BCM		Rear door lock actuator LH		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M21	155	D202	1	Yes
M21	154	D202	2	Yes

Check continuity between BCM harness connector and ground.

BCM		—	Continuity
Connector	Terminal	—	Continuity
M21	155	Ground	No
M21	154	Ground	No

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair or replace harness.

CHECK BCM OUTPUT SIGNAL

Connect BCM connector.
Check voltage between BCM harness connector and ground.

(+)		(–)	Condition		Voltage (Approx.)
BCM
Connector	Terminal
M21	155	Ground	Door lock and unlock switch	Unlock	Battery voltage
M21	154	Ground	Door lock and unlock switch	Lock	Battery voltage

Is the inspection result normal?

YES >>

Check for internal short of rear door lock actuators.

NO >>

Replace BCM. Refer to Removal and Installation.

Rear Rh

Component Function Check

Component Function Check

CHECK FUNCTION
1. CONSULT
  1. Select "DOOR LOCK" in "Active Test" mode of "BCM(DOOR LOCK)".
  2. Select “ALL LOCK” or “ALL UNLK” to check that it works normally.
Is the inspection result normal?
YES >>
Door lock actuator is OK.
NO >>
Refer to Diagnosis Procedure.

Diagnosis Procedure

Diagnosis Procedure

CHECK DOOR LOCK ACTUATOR INPUT SIGNAL

Ignition switch OFF.
Disconnect rear door lock actuator RH connector.
Check voltage between rear door lock actuator RH harness connector and ground.

(+)		(–)	Condition		Voltage (Approx.)
Rear door lock actuator RH
Connector	Terminal
D302	4	Ground	Door lock and unlock switch	Lock	Battery voltage
D302	3	Ground	Door lock and unlock switch	Unlock	Battery voltage

Is the inspection result normal?

YES >>

Replace rear door lock actuator RH. Refer to Removal and Installation.

NO >>

GO TO 2.

CHECK DOOR LOCK ACTUATOR CIRCUIT

Disconnect BCM connector and rear door lock actuators connectors.

Check continuity between BCM harness connector and rear door lock actuator RH harness connector.

BCM		Rear door lock actuator RH		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M21	155	D302	3	Yes
M21	154	D302	4	Yes

Check continuity between BCM harness connector and ground.

BCM		—	Continuity
Connector	Terminal	—	Continuity
M21	155	Ground	No
M21	154	Ground	No

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair or replace harness.

CHECK BCM OUTPUT SIGNAL

Connect BCM connector.
Check voltage between BCM harness connector and ground.

(+)		(–)	Condition		Voltage (Approx.)
BCM
Connector	Terminal
M21	155	Ground	Door lock and unlock switch	Unlock	Battery voltage
M21	154	Ground	Door lock and unlock switch	Lock	Battery voltage

Is the inspection result normal?

YES >>

Check for internal short of rear door lock actuators.

NO >>

Replace BCM. Refer to Removal and Installation.

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