Nissan Sentra B18 (2020-2025) Service Manual / Body Exterior, Doors, Roof & Vehicle Security / Security Control System :: Intelligent Key System / Symptom Diagnosis / Engine Does Not Start When Intelligent Key Is Inside of Vehicle

Nissan Sentra B18 (2020-2025) Service Manual: Engine Does Not Start When Intelligent Key Is Inside of Vehicle

Diagnosis Procedure

Diagnosis Procedure

DESCRIPTION

Engine does not start when push-button ignition switch is pressed while carrying Intelligent Key.

Note:

Before starting diagnosis check that Nissan Sentra vehicle condition is as shown in “Conditions of vehicle”, and check each symptom.
The engine start function, door lock function, power distribution system, and NATS-IVIS/NVIS in the Intelligent Key system are closely related to each other regarding control. The Nissan Sentra vehicle security function can operate only when the door lock and power distribution system are operating normally.

SYMPTOM TABLE (BOTH INTELLIGENT KEYS HAVE THE SAME SYMPTOMS)


Door lock operation (remote keyless entry)	Door lock operation (request switch of front/rear/back door) or trunk/back door open operation (opener switch of trunk/back door panel)	Engine started with push-button ignition switch operation (registered Intelligent Key is within the detection area of inside key antenna)	Engine started with push-button ignition switch operation (registered Intelligent Key placed next to push-button ignition switch)
OK	OK	No crank, No start	OK

CONDITIONS OF Nissan Sentra Vehicle (OPERATING CONDITIONS)

“ENGINE START BY I-KEY” setting in “Work support” mode of “HANDS FREE MODULE” is ON.
One or more Intelligent Keys with a registered Intelligent Key ID are in the Nissan Sentra vehicle.

DIAGNOSIS PROCEDURE

CHECK INTELLIGENT KEY SYSTEM SYMPTOM TABLE
1. Check Intelligent Key system symptom table.
  
  Refer to Diagnosis Procedure.
>>
GO TO 2.
PERFORM SELF DIAGNOSTIC RESULT
1. CONSULT
  
  Select “Self Diagnostic Result” mode of “HANDS FREE MODULE”, and check if DTC is detected.
Is DTC detected?
YES>>
Perform the trouble diagnosis for the detected DTC.
NO>>
GO TO 3.
CHECK “ENGINE START BY I-KEY” SETTING IN “WORK SUPPORT”
1. CONSULT
  1. Select “HANDS FREE MODULE”.
  2. Select “ENGINE START BY I-KEY” of “Work support” mode.
  3. Select “ENGINE START BY I-KEY” in “Work support”.
Is the inspection result normal?
YES >>
GO TO 4.
NO >>
Set “On” in “ENGINE START BY I-KEY”.
CHECK INSIDE KEY ANTENNA
1. Check inside key antenna.
  - NATS antenna. Refer to DTC Diagnosis Procedure.
  - Inside key antenna. Refer to DTC Diagnosis Procedure.
Is the inspection result normal?
YES >>
GO TO 5.
NO >>
Repair or replace malfunctioning parts.
CHECK PUSH-BUTTON IGNITION SWITCH
1. Refer to Component Function Check.
Is the inspection result normal?
YES >>
GO TO 6.
NO >>
Repair or replace malfunctioning parts.
REPLACE INTELLIGENT KEY UNIT
1. 1. Replace Intelligent Key unit. Refer to Removal and Installation.
  2. Check operation after replacement.
Is the inspection result normal?
YES >>
Inspection End.
NO >>
Check intermittent incident. Refer to Intermittent Incident.

 Engine Can Not Start

Diagnosis Procedure Diagnosis Procedure DESCRIPTION Engine does not start when push-button ignition switch is pressed. SYMPTOM TABLE (BOTH INTELLIGENT KEYS HAVE THE SAME SYMPTOM...

 Engine Does Not Start When Intelligent Key Is Inside of Vehicle (one Key)

Diagnosis Procedure Diagnosis Procedure DESCRIPTION Engine does not start when push-button ignition switch is pressed. (One Intelligent Key has the symptom, other keys operate n...

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