Nissan Sentra B18 (2020-2025) Service Manual / Transmission & Driveline / Transaxle & Transmission :: Cvt: Re0f15a / Dtc/circuit Diagnosis / Shift Lock System

Nissan Sentra B18 (2020-2025) Service Manual: Shift Lock System

Without Remote Engine Start

Component Function Check

Component Function Check

CHECK SHIFT LOCK OPERATION (PART 1)
1. 1. Ignition switch ON.
  2. Shift the selector lever to “P” position.
  3. Attempt to shift the selector lever to any other than position with the brake pedal released.
Can the selector lever be shifted to any other position?
YES >>
Refer to Diagnosis Procedure.
NO >>
GO TO 2.
CHECK SHIFT LOCK OPERATION (PART 2)
1. Attempt to shift the selector lever to any other than position with the brake pedal depressed.
Can the selector lever be shifted to any other position?
YES>>
Inspection End.
NO>>
Refer to Diagnosis Procedure.

Diagnosis Procedure

Diagnosis Procedure

CHECK POWER SOURCE (PART 1)

Ignition switch OFF.
Disconnect stop lamp switch connector
Ignition switch ON.

Check the voltage between the stop lamp switch harness connector and ground.

(+)	(-)	Voltage (Approx.)
E60	3	Ground	Battery voltage

(+)

(-)

Voltage

(Approx.)

Stop lamp switch

Connector

Terminal

E60

Ground

Battery voltage

Is the inspection result normal?

YES >>

GO TO 2.

NO >>

GO TO 7.

CHECK STOP LAMP SWITCH
1. Check stop lamp switch. Refer to Component Inspection (Stop Lamp Switch).
Is the inspection result normal?
YES >>
GO TO 3.
NO >>
GO TO 8.

CHECK CIRCUIT BETWEEN STOP LAMP SWITCH AND CVT SHIFT SELECTOR

Disconnect CVT shift selector connector

Check the continuity between the stop lamp switch harness connector and the CVT shift selector harness connector.

Stop lamp switch		CVT shift selector		Continuity
Connector	Terminal	Connector	Terminal	Continuity
E60	4	M38	3	Yes

Also check short circuit in harness.

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair or replace the malfunctioning parts.

CHECK GROUND CIRCUIT

Check the continuity between the CVT shift selector harness connector and ground.

CVT shift selector		—	Continuity
Connector	Terminal	—	Continuity
M38	4	Ground	Yes

Is the inspection result normal?

YES >>

GO TO 5.

NO >>

Repair or replace the malfunctioning parts.

CHECK PART POSITION SWITCH
1. 1. Disconnect park position switch connector.
  2. Check park position switch. Refer to Component Inspection (Park Position Switch).
Is the inspection result normal?
YES >>
GO TO 6.
NO >>
Repair or replace the malfunctioning parts.
CHECK SHIFT LOCK SOLENOID
1. 1. Disconnect shift lock solenoid connector.
  2. Check shift lock solenoid. Refer to Component Inspection (Shift Lock Solenoid).
Is the inspection result normal?
YES >>
Inspection End.
NO >>
Repair or replace the malfunctioning parts.
DETECT MALFUNCTIONING ITEM
1. Check the following items:
  - Open circuit or short circuit in harness between ignition switch and stop lamp switch connector. Refer to Wiring Diagram.
  - Ignition switch
  - 10A fuse [No. 49]. Refer to Terminal Arrangement.
Is the inspection result normal?
YES >>
Inspection End.
NO >>
Repair or replace the malfunctioning parts.
CHECK INSTALLATION POSITION OF STOP LAMP SWITCH
1. Adjust stop lamp switch position. Refer to Adjustment.
>>
GO TO 9.
CHECK STOP LAMP SWITCH (PART 2)
1. Check stop lamp switch. Refer to Component Inspection (Stop Lamp Switch).
Is the inspection result normal?
YES >>
Inspection End.
NO >>
Repair or replace the malfunctioning parts.

With Remote Engine Start

Component Function Check

Component Function Check

CHECK SHIFT LOCK OPERATION (PART 1)
1. 1. Apply the parking brake.
  2. Start the engine (normal engine run mode).
  3. Attempt to shift the CVT shift selector to any other than position with the brake pedal released.
Can the CVT shift selector be shifted to any other position?
YES>>
Refer to Diagnosis Procedure.
NO>>
GO TO 2.
CHECK SHIFT LOCK OPERATION (PART 2)
1. Attempt to shift the CVT shift selector to any other than position with the brake pedal depressed.
Can the CVT shift selector be shifted to any other position?
YES>>
Inspection End.
NO>>
Refer to Diagnosis Procedure.

Diagnosis Procedure

Diagnosis Procedure

CAUTION:

Apply the parking brake.

CHECK DTC (BCM)
1. CONSULT
  1. Ignition switch ON.
  2. Select “Self Diagnostic Results” mode of “BCM”.
Is any DTC detected?
YES >>
Check DTC detected item.
NO >>
GO TO 2 .

CHECK POWER SOURCE (PART 1)

Remove the center console assembly. Refer to Removal and Installation.
Connect ignition switch.
Start the engine (normal engine run mode).
Disconnect CVT shift selector connector.

Check the voltage between the CVT shift selector harness connector and ground.

(+)		(-)	Condition	Voltage (Approx.)
CVT shift selector
Connector	Terminal
M38	3	Ground	Brake pedal is depressed	Battery voltage
M38	3	Ground	Brake pedal is released	0 V

Is the inspection result normal?

YES >>

GO TO 3.

NO >>

GO TO 4.

CHECK GROUND CIRCUIT

Stop the engine.

Check the continuity between the CVT shift selector harness connector and ground.

CVT shift selector		—	Continuity
Connector	Terminal	—	Continuity
M38	4	Ground	Yes

Is the inspection result normal?

YES >>

Repair or replace CVT shift selector. Refer to Removal and Installation.

NO >>

Repair or replace damaged parts.

CHECK POWER SOURCE (PART 2)

Stop the engine.
Remove the remote start relay.
Ignition switch ON.

Check the voltage between the remote start relay harness connector and ground.

(+)		(-)	Condition	Voltage (Approx.)
Remote start relay
Connector	Terminal
M145	2	Ground	–	Battery voltage
	5		Brake pedal is depressed	Battery voltage
	5		Brake pedal is released	0 V

Is the inspection result normal?

YES >>

GO TO 5.

NO >>

Terminal #2 is abnormal: GO TO 9.

NO >>

Terminal #5 is abnormal: GO TO 10.

NO >>

Terminal #2 and #5 are abnormal: GO TO 14.

CHECK CIRCUIT BETWEEN REMOTE START RELAY AND CVT SHIFT SELECTOR

Ignition switch OFF.

Check the continuity between the remote start relay harness connector and the CVT shift selector harness connector.

Remote start relay		CVT shift selector		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M145	3	M38	3	Yes

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES >>

GO TO 6.

NO >>

Repair or replace damaged parts.

CHECK REMOTE START RELAY
1. Check the remote start relay. Refer to Component Inspection (Remote Start Relay).
Is the inspection result normal?
YES >>
GO TO 7.
NO >>
Replace the remote start relay.
CHECK BCM TERMINAL #18 SIGNAL
1. 1. Install the remote start relay.
  2. Check the BCM terminal #18 signal. Refer to Reference Value.
Is the inspection result normal?
YES >>
Check intermittent incident. Refer to Intermittent Incident.
NO >>
GO TO 8.

CHECK CIRCUIT BETWEEN REMOTE START RELAY AND BCM

Remove the remote start relay.
Disconnect the BCM connector.

Check the continuity between the remote start relay harness connector and the BCM harness connector.

Remote start relay		BCM		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M145	1	M84	18	Yes

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES >>

Replace the BCM. Refer to Removal and Installation.

NO >>

Repair or replace damaged parts.

DETECT MALFUNCTIONING ITEM (PART 1)
1. 1. Ignition switch OFF.
  2. Check the following items:
    - Open or short circuit of the harness between the ignition switch and the remote start relay connector terminal #2. Refer to Wiring Diagram.
    - Ignition switch
    - 10A fuse [No. 49, fuse block (J/B)]. Refer to Terminal Arrangement.
Is the inspection result normal?
YES >>
Check intermittent incident. Refer to Intermittent Incident.
NO >>
Repair or replace damaged parts.

CHECK HARNESS BETWEEN STOP LAMP SWITCH AND REMOTE START RELAY

Ignition switch OFF.
Disconnect the stop lamp switch connector.

Check the continuity between the stop lamp switch harness connector and the remote start relay harness connector.

Stop lamp switch		Remote start relay		Continuity
Connector	Terminal	Connector	Terminal	Continuity
E60	4	M145	5	Yes

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES >>

GO TO 11.

NO >>

Repair or replace damaged parts.

CHECK STOP LAMP SWITCH MOUNTING POSITION
1. Check stop lamp switch mounting position. Refer to Inspection.
Is the inspection result normal?
YES >>
GO TO 12.
NO >>
Adjust stop lamp switch mounting position.
CHECK STOP LAMP SWITCH
1. Check stop lamp switch. Refer to Component Inspection (Stop Lamp Switch).
Is the inspection result normal?
YES >>
GO TO 13.
NO >>
Repair or replace stop lamp switch.
DETECT MALFUNCTIONING ITEM (PART 2)
1. Check that open or short circuit of the harness between the ignition switch and the stop lamp switch connector terminal #3. Refer to Wiring Diagram.
Is the inspection result normal?
YES >>
Check intermittent incident. Refer to Intermittent Incident.
NO >>
Repair or replace damaged parts.
DETECT MALFUNCTIONING ITEM (PART 3)
1. 1. Ignition switch OFF.
  2. Check the following items:
    - Open or short circuit of the harness between the ignition switch and the remote start relay connector terminal #2. Refer to Wiring Diagram.
    - Check that open or short circuit of the harness between the ignition switch and the stop lamp switch connector terminal #3. Refer to Wiring Diagram.
    - Ignition switch
    - 10A fuse [No. 49, fuse block (J/B)]. Refer to Terminal Arrangement.
Is the inspection result normal?
YES>>
Check intermittent incident. Refer to Intermittent Incident.
NO>>
Repair or replace damaged parts.

Component Inspection (stop Lamp Switch)

Component Inspection (Stop Lamp Switch)

CHECK STOP LAMP SWITCH

Check continuity between the stop lamp switch connector terminals.

Stop lamp switch	Condition	Continuity
Terminals	Condition	Continuity
3 – 4	Depressed brake pedal	Yes
3 – 4	Released brake pedal	No

Is the inspection result normal?

YES >>

Inspection End.

NO >>

Replace stop lamp switch. Refer to Exploded View.

Component Inspection (park Position Switch)

Component Inspection (Park Position Switch)

CHECK PARK POSITION SWITCH

Check continuity between park position switch connector terminals.

CAUTION:

Connect the fuse between the terminals when applying the voltage.

Never cause shorting between terminals.

CVT shift selector	Condition	Continuity
Terminals	Condition	Continuity
3 – 4	Shift selector lever to “P” position.	Yes
3 – 4	Other than above	No

Is the inspection result normal?

YES >>

Inspection End.

NO >>

Replace CVT shift selector. Refer to Removal and Installation.

Component Inspection (shift Lock Solenoid)

Component Inspection (Shift Lock Solenoid)

CHECK SHIFT LOCK SOLENOID

Apply voltage to terminals of shift lock solenoid connector and check that shift lock solenoid is activated.

CAUTION:

Connect the fuse between the terminals when applying the voltage.

Never cause shorting between terminals.

+ (fuse)	(-)	Condition	Status
CVT shift selector
Terminals
3	4	Apply battery voltage between terminals 3 and 4 with the park position switch in the "P" (park) position.	Shift lock solenoid operates

Is the inspection result normal?

YES>>

Inspection End.

NO>>

Replace CVT shift selector. Refer to Removal and Installation.

Component Inspection (remote Start Relay)

Component Inspection (Remote Start Relay)

CHECK REMOTE START RELAY

Apply battery voltage between the remote start relay connector terminals 1 and 2.

CAUTION:
Check continuity between the remote start relay connector terminals 3 and 5.

Remote start relay	Condition	Continuity
Terminals	Condition	Continuity
3 – 5	Apply voltage between terminals 1 and 2.	Yes
3 – 5	Do not apply voltage between terminals 1 and 2.	No

Is the inspection result normal?

YES >>

Inspection End.

NO >>

Replace remote start relay. Refer to Component Parts Location.

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