Nissan Sentra B18 (2020-2025) Service Manual: Diagnosis Procedure

Nissan Sentra B18 (2020-2025) Service Manual / Body Exterior, Doors, Roof & Vehicle Security / Door & Lock :: Symptom Diagnosis / All Doors Do Not Lock/unlock or Trunk/back Door Do Not Open with Request Switch / Diagnosis Procedure

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 detected DTC.
NO>>
GO TO 3.
CHECK OUTSIDE KEY ANTENNA
1. Use SIGNAL TECH II to check each outside key antenna. For the inspection method and how to use SIGNAL TECH II, refer to “NISSAN/INFINITI SIGNAL TECH II USER GUIDE”.
Is the inspection result normal?
YES>>
GO TO 4.
NO>>
GO TO 5.
CHECK INTELLIGENT KEY OUTPUT SIGNAL
1. Use SIGNAL TECH II to check Intelligent Key outside signal. For the inspection method and how to use SIGNAL TECH II, refer to “NISSAN/INFINITI SIGNAL TECH II USER GUIDE”.
Is the inspection result normal?
YES>>
GO TO 6.
NO>>
Replace the malfunctioning outside key antenna.
CHECK DOOR REQUEST SWITCH
1. Check each door request switch.
  - Front door: Refer to Component Inspection.
  - Trunk lid: Refer to Component Inspection.
Is the inspection result normal?
YES>>
GO TO 6.
NO>>
Repair or replace the 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.

Description

Description All doors do not lock/unlock using front door request switch or trunk does not open using trunk opener request switch. Note: Before starting diagnosis check that Nissan Sent ...

Door Does Not Lock/unlock and Engine Does Not Start (req Sw/push Sw) (all Keys)

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Other materials:

Removal and installation
Starter motor Exploded View вЂњSвЂќ terminal harness вЂњBвЂќ terminal harness Starter motor Cylinder block Removal and Installation NOTE: When removing components such as hoses, tubes/lines, etc., cap or plug openings to prevent fluid from spilling. REMOVAL Dis ...

Preparation
Special Service Tool Special Service Tool The actual shape of the tools may differ from those illustrated here. Tool number (TechMate No.) Tool name Descriptio ...

P1805 Brake switch
DTC Logic DTC DETECTION LOGIC DTC No. CONSULT screen terms (Trouble diagnosis content) DTC detecting condition Possible cause P1805 BRAKE SW/CIRCUIT (Brake switch circuit) Stop lamp signal is not sent to ECM for extremely long time while the vehicle is drivi ...