11.9.2 Description and operation 

11.9.2.1 Description and operation 

Electric door locks use a solenoid valve within each door lock assembly. Door locks can only be 
controlled by combination switch on the left front inside door handle or the driver door lock 
cylinder switch (remote control key operation). When using the actuator or lock cylinder to lock or 
unlock the driver door, all doors will be locked or unlocked. 

Lock and Unlock 

– 

If only one of the following actions is conducted within 2s: front door key switch is placed to 
unlock position (lasting for no less than 0.1s), front door key switch signal should be 
separately unlocked driver's side door lock signal. 

– 

If only two of the following actions are conducted within 2s: front door key switch is placed 
to lock position (lasting for no less than 0.1s), front door key switch signal should be 
unlocked three other door lock signal. Later, front door key switch is placed to the unlock 
position again within 2s (lasting for no less than 0.1s), the first item (above item) should be 
carried out. 

– 

If conducting the following actions: front door key switch is placed to lock position (lasting 
for no less than 0.1s), the front door key switch signal is the signal from the closed 5 door 
locks. 

– 

If the front door key switch is placed to unlock position (lasting for no less than 1s), the front 
door key switch signal first should be separate unlock driver's side door lock signal (100ms), 
and then it should be other three door lock signal (when it is 1s). 

Automatic padlock 

– 

Speed automatic lock: when key is placed in ON position of ignition switch and five doors 
are in closed status, if the speed increases to above 30km/h from below 30km/h, BCM will 
drive five door lock motors to conduct lock action. Drive time last for 200ms. If the speed is 
changed again or repeatedly from less than 30km/h to more than 30km/h, and the BCM 
memory door lock state is not closed, the BCM drives five door lock motors to lock again, 
with driving time for 200ms consecutively. 

–  Single individual interlock: automatic interlock after backdoor closed for 2s after remote 

control or back door unlock switch unlock the back door lock, the BCM automatically 
executes the backdoor lock if there is no backdoor operation within 30s. 

Remind of not pulling out the key 

When the key is inserted in the position OFF of the ignition lock (the position ACC is not 
detected), the door can not be locked; if the driver-side door is opened, the BCM will transmit a 
periodic alarm signal to the instrument, so that the instrument gives an alarm to remind of not 
pulling out the key. 

Automatic unlock 

– 

Lazy automatic unlock: When vehicle speed is lower than 5km/h, if the key isn’t place on 
ON position, BCM will drive four door lock motors to conduct unlock action. Drive time will 
last for 200ms. 

– 

Impact unlock: when the key is placed in ON position, if BCM the air bag impact signal 
received by BCM is sent to BCM impack unlock signal through hard wire, BCM will drive 
four door motors to conduct unlock action at the same time. The drive time will last for 
200ms. There are two times of unlock actions with interval of 2s. When the airbag is normal 
without being detonated, the periodic signal of 200ms high and 40ms low is given, and the 
periodic signal of 200ms low and 40ms high is output after being detonated. The specific 
description of airbag collision signal refers to Technical Code of Airbag Signal. 

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– 

Key is placed inside ignition switch, driver side door is from open to close status, and BCM 
drives driver's side door separately unlock once. 

Super Locking (such as equipment) 

Realize the super-locking function through two modes. 

– 

Press "lock" key on the remote controller twice within 300ms. 

– 

Place the key in door lock from "unlock" to "lock" position twice within 3s. 

The flash lamp will flicker once to confirm the two above modes. 

Notes: 

At this time, vehicle door can be only unlocked by a legal key or remote control. 

Control function of center door lock 

1.  IF central door lock switch is placed to lock position, BCM will drive 5 door lock motors to 

conduct lock action. Drive time will last for 200ms. 

2.  When it is not on ON position, or it is on ON position but vehicle speed is lower than 15km/h, 

if central door lock switch is placed to unlock position, BCM dirve 4 door lock motors to 
conduct unlock action. Drive time will last for 200ms. 

3.  When it is in ON gear and vehicle speed is not less than 15km/h, central door lock switch is 

pressed to unlock position, all 5 door lock motors have no action. 

4.  If the central control door lock switch is pressed to the unlock and lock positions 

simultaneously, then five door lock motors will not be actuated. 

5.  Only when the BCM is in the "Normal" and "Waiting to Exit the Body Anti-theft Mode" 

mode of the "Anti-theft Alarm Function" can the central control lock switch perform the 
unlock/lock action. 

Control function of remote control unit 

In the body anti-theft alarm state, do not unlock the backdoor when pressing down the remote 
control unlock backdoor key. 

1.  The following conditions should be satisfied: 

– 

Key is placed in a position other than ON position of ignition switch; 

If the remote-control signal is as follows: individually unlock the driver-side door lock signal, the 
BCM drives the driver-side door lock motor to unlock, with driving time for 200ms consecutively. 

2.  The following conditions should be satisfied: 

– 

Key is placed in a position other than ON position of ignition switch; 

If the remote-control signal is as follows: unlock the other three door lock signals, the BCM drives 
the three door lock motors to unlock acutely, with driving time for 200ms consecutively. 

3.  If the following conditions are satisfied: 

Key is placed in pull-out position of ignition switch; 

– 

Four doors are in the closed status; 

– 

Back-door is in the "OFF" status 

– 

Engine hood is place at the "OFF" status, 

If the remote-control signal is as follows: lock five door lock signals, the BCM drives the five 
door lock motors to lock, with driving time for 200ms consecutively. 

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4.  For opening of rear door, one of the following conditions must be satisfied: 

– 

Key is not placed in ON position of ignition switch. 

– 

Key is placed in ON position of ignition switch and vehicle speed is lower than 5km/h; 

If the remote-control signal is as follows: unlock the back door signal, the BCM drives the back 
door lock motor to unlock, with driving time for 200ms consecutively. 

5.  When the body anti-theft system does not sound the alarm, the back door will be opened but 

does not exit the guard mode if the remote control signal is Unlock Back Door. 

Key lock cylinder control function of front door 

1.  If BCM control unit detects that front door key switch is door lock signal on separate unlock 

driver's side, BCM will drive driver's side door lock motor to conduct unlock action. Drive 
time will last for 200ms. 

2.  If front door key switch signal is to unlock signals of other three doors, BCM will drive 3 

door lock motors to conduct unlock actions. Drive time will last for 200ms. 

3.  IF BCM control unit detects that front door key switch signal is the signal to lock 5 doors, 

BCM will drive 5 door lock motors to conduct lock actions at the same time. Drive time will 
last for 200ms. 

Priority of center controller 

1.  Priority level: when several signals are effective at the same time: 

Collision unlock>front door key switch signal>remote control signal>remote control central 
lock>idle automatic unlocking and speed automatic locking function 

2.  When one of above signals is effective and conducts relevant action, if incurred at this time, 

another signal will be ignored. However, when a collision unlock signal incurs, BCM (Body 
Control Module) immediately carry out collision unlock action. 

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11.9.3 System work principle 

11.9.3.1 System operating principle 

Door lock switch 

– 

The system is equipped with two door lock switches; one is located in the left front door 
combination switch and the other is in the left front door key cylinder. Other key cylinders 
can only be used to unlock a single door and can not activate the function of central control 
door lock. 

– 

Lock signals from two door lock switches are input into one input terminal of BCM, but the 
unlock signal is indeed input separately. 

Locking operation 

When the BCM receives a switch lock input signal or meets automatic locking condition, output 
power supply from the lock output end of the BCM to control the door lock motor of the five 
doors to lock. 

Unlocking operation 

When the BCM receives a switch unlock input signal or meets automatic unlocking condition, 
output power supply from the unlock output end of the BCM to control a door lock motor of the 
four doors and back door to unlock. (rear back door is unlocked separately) 

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