Your Vehicle: 2009 Nissan-Datsun Altima V6-3.5L (VQ35DE)
 
Vehicle » Starting and Charging » Starting System » Testing and Inspection » Component Tests and General Diagnostics » Key Cylinder Switch » Diagnosis Procedure  
 
 
  Diagnosis Procedure  
 

KEY CYLINDER SWITCH

Description

For vehicles equipped with LH and RH anti-pinch system, the main power window and door lock/unlock switch detects condition of the door key cylinder switch and transmits to BCM as the LOCK or UNLOCK signal.
For vehicles equipped with LH anti-pinch system only, the front door lock assembly LH (key cylinder switch) transmits the LOCK or UNLOCK signal directly to the BCM.

KEY CYLINDER SWITCH

Diagnosis Procedure

1.CHECK DOOR KEY CYLINDER SWITCH INPUT SIGNAL

  1. Turn ignition switch ON.

  

  1. Check voltage between BCM connector and ground.

  

Is the Inspection result normal?
YES >> Replace main power window and door lock/unlock switch. Refer to See: Body and Frame\Locks\Power Locks\Locations\Door Lock\Front Door Lock\Sedan Without Intelligent Key See: Body and Frame\Locks\Power Locks\Service and Repair\Front Door Lock\Sedan Without Intelligent Key.
NO >> GO TO 2
2.CHECK DOOR KEY CYLINDER SWITCH GROUND CIRCUIT

  1. Turn ignition switch OFF.
  2. Disconnect front door lock assembly LH (key cylinder switch) connector.

  

  1. Check continuity between front door lock assembly LH (key cylinder switch) connector and ground.

  

Is the Inspection result normal?
YES >> GO TO 3
NO >> Repair or replace harness.
3.CHECK DOOR KEY CYLINDER SIGNAL CIRCUIT

  1. Disconnect BCM connector M18.

  

  1. Check continuity between front door lock assembly LH (key cylinder switch) connector and BCM connector M18.

  

  1. Check continuity between front door lock assembly LH (key cylinder switch) connector and ground.

  

Is the Inspection result normal?
YES >> GO TO 4
NO >> Repair or replace harness.
4.CHECK DOOR KEY CYLINDER SWITCH
Check door key cylinder switch. Refer to See: Component Inspection\Sedan Without Intelligent Key.
Is the Inspection result normal?
YES >> Check intermittent incident. Refer to See: Testing and Inspection\Initial Inspection and Diagnostic Overview\Service Information For Electrical Incident\Intermittent Incident.
NO >> Replace front door lock assembly LH (key cylinder switch). Refer to See: Body and Frame\Locks\Power Locks\Locations\Door Lock\Front Door Lock\Sedan Without Intelligent Key See: Body and Frame\Locks\Power Locks\Service and Repair\Front Door Lock\Sedan Without Intelligent Key.