Nissan Altima 2007-2012 Service Manual: 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.
Component Function Check
1.CHECK DOOR KEY CYLINDER SWITCH INPUT SIGNAL
Check KEY CYL UN-SW, KEY CYL UN-SW in “DATA MONITOR” mode for “POWER DOOR LOCK SYSTEM” with CONSULT-III. Refer to DLK-231, "Work Flow".
Is the inspection result normal? YES >> Key cylinder switch is OK.
NO >> Refer to DLK-306, "Diagnosis Procedure (With LH Anti-Pinch Only)".
Diagnosis Procedure
1.CHECK DOOR KEY CYLINDER SWITCH INPUT SIGNAL
1. Turn ignition switch ON.
2. Check voltage between BCM connector and ground.
Is the inspection result normal? YES >> Replace main power window and door lock/unlock switch. Refer to PWC-186, "Removal and Installation".
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.
3. 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.
2. Check continuity between front door lock assembly LH (key cylinder switch) connector and BCM connector M18.
3. 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 SEC-508, "Component Inspection".
Is the inspection result normal? YES >> Check intermittent incident. Refer to GI-42, "Intermittent Incident".
NO >> Replace front door lock assembly LH (key cylinder switch). Refer to DLK-451, "FRONT DOOR LOCK : Removal and Installation".
Component Inspection
COMPONENT INSPECTION
1.CHECK DOOR KEY CYLINDER SWITCH
Check front door lock assembly LH (key cylinder switch).
Is the inspection result normal? YES >> Key cylinder switch is OK.
NO >> Replace front door lock assembly LH (key cylinder switch). Refer to DLK-451, "FRONT DOOR LOCK : Removal and Installation".
Key slot illumination
Description
Blinks when keyfob insertion is required.
Component Function Check
1.CHECK FUNCTION
Check key slot illumination (“KEY SLOT ILLUMI”) Active Test mode.
Is the inspection resul ...
Horn
Description
Horn (high/low) is located inside of front bumper and operates when theft
warning system is in alarm phase.
Component Function Check
1.CHECK FUNCTION
1. Select HORN in “ACTIVE TES ...
Other materials:
IPDM-E branch line circuit
Diagnosis Procedure
INSPECTION PROCEDURE
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the terminals and connectors of the IPDM E/R for damage, bend and loose
connection (unit side
and connector side).
Is the i ...
Drive belts
Checking Drive Belts
WARNING:
Inspect the drive belt only when the engine is stopped.
NOTE:
On vehicles not equipped with A/C, there is an idler pulley in the position for
the drive belt routing.
• Make sure that the stamp mark of drive belt auto-tensioner is within the
usable ...
B2614 ACC relay circuit
Description
BCM controls the various electrical components and simultaneously supplies
power according to the power
supply position.
BCM checks the power supply position internally.
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1. PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ...