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Nissan Sentra B18 (2020-2025) Service Manual: Component Parts

Security Control System with M/t

Component Parts Location

Component Parts Location

A.

View with transmission removed

No.

Component

Function

1.

Inside key antenna (trunk room)

Inside key antenna (trunk room) detects whether Intelligent Key is inside the Nissan Sentra vehicle or not, and then transmits the signal to the Intelligent Key unit.

Refer to Inside Key Antenna (trunk room) for detailed component location.

2.

Door switches

Door switch detects door open/close condition and then transmits ON/OFF signal to BCM.

Refer to Front Door Switch or Rear Door Switch for detailed component location.

3.

Power window and door lock/unlock switch RH

Refer to Power window and door lock/unlock switch RH for detailed component location.

4.

Intelligent Key unit

Intelligent Key unit controls INTELLIGENT KEY SYSTEM (ENGINE START FUNCTION), NISSAN Nissan Sentra Vehicle IMMOBILIZER SYSTEM-NATS [NVIS (NATS)] and VEHICLE SECURITY SYSTEM.

Intelligent Key unit performs the ID verification between Intelligent Key unit and Intelligent Key when the Intelligent Key is carried into the detection area of inside key antenna, and push-button ignition switch is pressed. If the ID verification result is OK, ignition switch operation is available.

Then, when the ignition switch is placed ON, Intelligent Key unit performs ID verification between Intelligent Key unit and ECM. If the ID verification result is OK, ECM can start engine.

Refer to Component Parts Location for detailed component location.

5.

Horn (low)

Horn is operated when the panic button on the Intelligent Key is pressed or the alarm is activated.

6.

Hood switch

Hood switch transmits hood open/closed signal to the IPDM E/R.

Refer to Hood Switch.

7.

ECM (Engine Control Module)

Refer to Component Description for detailed component location.

8.

IPDM E/R (Intelligent Power Distribution Module Engine Room)

IPDM E/R detects hood open/closed signal and controls horns when horn chirp is required.

Refer to Component Parts Location for detailed component location.

9.

Clutch master cylinder (clutch switch)

Clutch master cylinder (clutch switch) detects that the clutch pedal is depressed, and transmits the signal to the BCM.

10.

Stop lamp switch

Stop lamp switch detects that the brake pedal is depressed, and transmits the signal to the BCM.

Refer to Stop lamp switch for detailed component location.

11.

Brake pedal position switch

Stop lamp switch detects that the brake pedal is depressed, and transmits the signal to the BCM.

12.

BCM (Body Control Module)

BCM controls the door lock actuators.

Refer to Component Parts Location for detailed component location

13.

Push-button ignition switch/NATS antenna

Push-button ignition switch has NATS antenna and push switch inside which detects that push-button ignition switch is pressed, and then transmits ON/OFF signal to Intelligent Key unit. Intelligent Key unit changes the ignition switch position with the operation of push-button ignition switch. Intelligent Key unit maintains the ignition switch position status while push-button ignition switch is not operated.

Refer to NATS Antenna.

14.

Main power window and door lock/unlock switch

Door lock and unlock switch is integrated into the power window main switch.

Door lock and unlock switch transmits door lock/unlock operation signal to BCM.

Refer to Main power window and door lock/unlock switch for detailed component location.

15.

Trunk lid opener assembly (ajar switch)

Trunk lid opener assembly (ajar switch) detects open/close condition and then transmits ON/OFF signal to BCM.

16.

Park/neutral position (PNP) switch

Park/neutral position (PNP) switch detects that the Transmission is in the neutral position, and transmits the signal to the BCM.

Security Control System with Cvt

Component Parts Location

Component Parts Location

A.

View with shifter assembly removed

No.

Component

Function

1.

Inside key antenna (trunk room)

Inside key antenna (trunk room) detects whether Intelligent Key is inside the Nissan Sentra vehicle or not, and then transmits the signal to the Intelligent Key unit.

Refer to Inside Key Antenna (trunk room) for detailed component location.

2.

Door switches

Door switch detects door open/close condition and then transmits ON/OFF signal to BCM.

Refer to Front Door Switch or Rear Door Switch for detailed component location.

3.

Power window and door lock/unlock switch RH

Refer to Door Lock and Unlock Switch RH for detailed component location.

4.

Intelligent Key unit

Intelligent Key unit controls INTELLIGENT KEY SYSTEM (ENGINE START FUNCTION), NISSAN Nissan Sentra Vehicle IMMOBILIZER SYSTEM-NATS [NVIS (NATS)] and VEHICLE SECURITY SYSTEM.

Intelligent Key unit performs the ID verification between Intelligent Key unit and Intelligent Key when the Intelligent Key is carried into the detection area of inside key antenna, and push-button ignition switch is pressed. If the ID verification result is OK, ignition switch operation is available.

Then, when the ignition switch is placed ON, Intelligent Key unit performs ID verification between Intelligent Key unit and ECM. If the ID verification result is OK, ECM can start engine.

Refer to Component Parts Location for detailed component location.

5.

Horn (low)

Horn is operated when the panic button on the Intelligent Key is pressed or the alarm is activated.

6.

Hood switch

Hood switch transmits hood open/closed signal to the IPDM E/R.

Refer to Hood Switch.

7.

TCM (Transmission Control Module)

Refer to TCM for detailed component location.

8.

ECM (Engine Control Module)

Refer to Component Description for detailed component location.

9.

IPDM E/R (Intelligent Power Distribution Module Engine Room)

IPDM E/R detects hood open/closed signal and controls horns when horn chirp is required.

Refer to Component Parts Location for detailed component location.

10.

Stop lamp switch

Stop lamp switch detects that the brake pedal is depressed, and transmits the signal to the BCM.

Refer to Stop lamp switch for detailed component location.

11.

Brake pedal position switch

Stop lamp switch detects that the brake pedal is depressed, and transmits the signal to the BCM.

12.

BCM (Body Control Module)

BCM controls the door lock actuators.

Refer to Component Parts Location for detailed component location.

13.

Push-button ignition switch/NATS antenna

Push-button ignition switch has NATS antenna and push switch inside which detects that push-button ignition switch is pressed, and then transmits ON/OFF signal to Intelligent Key unit. Intelligent Key unit changes the ignition switch position with the operation of push-button ignition switch. Intelligent Key unit maintains the ignition switch position status while push-button ignition switch is not operated.

Refer to NATS Antenna.

14.

Main power window and door lock/unlock switch

Door lock and unlock switch is integrated into the power window main switch.

Door lock and unlock switch transmits door lock/unlock operation signal to BCM.

Refer to Main power window and door lock/unlock switch for detailed component location.

15.

Trunk lid opener assembly (ajar switch)

Trunk lid opener assembly (ajar switch) detects open/close condition and then transmits ON/OFF signal to BCM.

Refer to Component Parts Location for detailed component location.

16.

CVT shift selector (detent switch)

CVT shift selector detects the shift lever status and transmits park position switch signal status to the Intelligent Key unit.

Refer to Component Parts Location for detailed component location.

Nats Antenna

NATS Antenna

  • NATS antenna is installed under the push-button ignition switch.

  • If the ID is successfully verified, when push-button ignition switch is pressed and the engine can be started.

  • In that case, NATS ID verification can be performed when Intelligent Key backside is contacted to push-button ignition switch while brake pedal is depressed. If verification result is OK, engine can be started.

  • In MT models, clutch pedal must be depressed in order for engine to be started.

Hood Switch

Hood Switch

  • Hood switch is located under front of hood.

  • Hood switch is integrated into hood lock assembly. Hood switch detects that hood is open and then transmits ON/OFF signal to IPDM E/R. IPDM E/R transmits hood switch signal to BCM via CAN communication.

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