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 >> With LH and RH anti-pinch, refer to DLK-305, "Diagnosis Procedure (With LH and RH Anti- Pinch)".
NO >> With LH anti-pinch only, refer to DLK-306, "Diagnosis Procedure (With LH Anti-Pinch Only)".
Diagnosis Procedure (With LH and RH Anti-Pinch)
1.CHECK DOOR KEY CYLINDER SWITCH INPUT SIGNAL
1. Turn ignition switch ON.
2. Check voltage between main power window and door lock/ unlock switch connector and ground.
Is the inspection result normal? YES >> Replace main power window and door lock/unlock switch. Refer to PWC-91, "Removal and Installation".
NO >> GO TO 2
2.CHECK DOOR KEY CYLINDER SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect main power window and door lock/unlock switch connector and front door lock assembly LH (key cylinder switch) connector.
3. Check continuity between main power window and door lock/ unlock switch connector and front door lock assembly LH (key cylinder switch) connector.
4. Check continuity between main power window and door lock/ unlock switch connector and ground.
Is the inspection result normal? YES >> GO TO 3
NO >> Repair or replace harness.
3.CHECK DOOR KEY CYLINDER SWITCH GROUND CIRCUIT
Check continuity between front door lock assembly LH 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-318, "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".
Diagnosis Procedure (With LH Anti-Pinch Only)
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-91, "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-318, "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 Intelligent Key insertion is required.
Component Function Check
1.CHECK FUNCTION
Check key slot illumination (“KEY SLOT ILLUMI”) Active Test mode.
Is the inspectio ...
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:
Starting the engine
1. Apply the parking brake.
2. Move the shift lever to P (Park) or N (Neutral).
P (Park) is recommended.
The starter is designed not to operate if
the shift lever is in any of the driving
positions.
3. Push the ignition switch to the ON position.
Depress the brake pedal and push the ign ...
Passenger side
Description
Main power window and door lock/unlock switch, power window and door
lock/unlock switch RH and BCM
transmit and receive the signal by power window serial link.
The signal mentioned below is transmitted from BCM to main power window and door
lock/unlock switch and
power window a ...
Vehicle Dynamic Control (VDC) system
The Vehicle Dynamic Control (VDC) system uses
various sensors to monitor driver inputs and vehicle
motion. Under certain driving conditions,
the VDC System helps to perform the following
functions:
● Controls brake pressure to reduce wheel
slip on one slipping drive wheel so power is
tr ...