11.9.7 Diagnostic Information and Procedures
11.9.7.1 Diagnosis Description

Refer to

11.9.2

 

Description and Operation

get familiar with the system functions and operation before start system diagnostics, so

that it will help to determine the correct diagnostic steps, more importantly, it will also help to determine whether the customer
described situation is normal.

11.9.7.2 Visual Inspection

–

Check installed after market equipment that may affect Central Locking operation.

–

Check the easy to access system components to identify whether there is a significant damage or a potential malfunction.

–

If all door locks are inoperative, check the power supply circuit and the ground circuit for poor connection or open circuit before
replacing bulbs.

11.9.7.3 Symptom List

Symptoms

Suspected Faulty Parts

Repair Procedure

Mechanical key can not lock / unlock the
door

1. Central 

Locking 

Power 

Supply

Malfunction

2. Left Front Door Unlock / Lock Switch

Poor Connection

3. Wiring  Harness  Connector  Poor

Connection

4. Ground Poor Connection

5. Harness Malfunction

6. Central Locking Motor Malfunction

7. BCM Malfunction

1. Check the power supply circuit.

2. Check 

wiring 

harnesses 

and

connectors.

3. Check ground malfunction

4. Replace the door lock motor.

5. Check the BCM, if necessary, replace

the BCM.

Central locking switch can not lock / unlock
doors

1. Central 

Locking 

Power 

Supply

Malfunction

2. Left  Front  Door  Combination  Switch

Central Locking Switch Malfunction

3. Wiring  Harness  Connector  Poor

Connection

4. Ground Poor Connection

5. Harness Malfunction

6. Central Locking Motor Malfunction

7. BCM Malfunction

1. Check the power supply circuit.

2. Check 

wiring 

harnesses 

and

connectors.

3. Check ground malfunction

4. Check  the  left  front  door  window

switch.

5. Replace the lock motor.

6. Check the BCM, if necessary, replace

the BCM.

Body Electric

Central Locking

11-333

Symptoms

Suspected Faulty Parts

Repair Procedure

Only the left front door can not be locked /
unlocked

1. Central 

Locking 

Power 

Supply

Malfunction

2. Left  Front  Door  Lock  Harness

Connector Poor Connection

3. Left  Front  Door  Lock  Ground  Poor

Connection

4. Harness Malfunction

5. Left  The  Front  Door  Central  Locking

Motor Poor Connection

6. BCM Poor Connection

1. Check the power supply circuit.

2. Check 

wiring 

harnesses 

and

connectors.

3. Check ground malfunction

4. Replace the lock motor.

5. Check the BCM, if necessary, replace

the BCM.

Remote control does not lock / unlock
doors

1. Electromagnetic Interference

2. Remote Malfunction

3. Central 

Locking 

Power 

Supply

Malfunction

4. Wiring  Harness  Connector  Poor

Connection

5. Ground Poor Connection

6. Harness Malfunction

7. Central Locking Motor Malfunction

8. BCM Malfunction

1. Move 

to 

a 

non-interference

environment.

2. Check  the  remote  control  battery,  if

necessary, replace the remote control.

3. Check the power supply circuit.

4. Check  the  wiring  harnesses  and

connectors.

5. Check the ground.

6. Replace the door lock motor.

7. Check the BCM, if necessary, replace

the BCM.

Auto locking is not activated in central
locking anti-theft mode.

1. Insufficient Power Supply Voltage

2. Wiring  Harness  Connectors  Poor

Connection

3. Ground Poor Connection

4. Harness Malfunction

5. Central Locking Motor Contact Switch

Malfunction

6. BCM Malfunction

1. Check the power supply circuit.

2. Check  the  wiring  harnesses  and

connectors.

3. Check the ground.

4. Replace the lock motor.

5. Check the BCM, if necessary, replace

the BCM.

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Central Locking

Body Electric

Symptoms

Suspected Faulty Parts

Repair Procedure

Door lock operated during driving

1. Mechanical 

Lock 

Mechanism

Malfunction

2. Wiring  Harness  Connectors  Poor

Connection

3. Ground Poor Connection

4. Harness Malfunction

5. Central Locking Motor Contact Switch

Malfunction

6. BCM Malfunction

1. Adjust mechanical lock mechanism , if

necessary, replace the lock body.

2. Check  the  wiring  harnesses  and

connectors.

3. Check the ground.

4. Replace the lock motor.

5. Check the BCM, if necessary, replace

the BCM.

11.9.7.4 Mechanical Key / Central Locking Switch Can Not Lock All Doors

Schematic:

Body Control Module

Left Front Door Lock Assembly

Right Front Door Lock 

Assembly

Left Rear Door Lock 

Assembly

Right Rear Door Lock 

Assembly

Left 

Front 

Door 

switch

FE11-5801b

Diagnostic Steps:

Note

When there is not a remote control, use the scan tool special setting function to drive door locks. Select as the following
sequence: body control module / BCM special setting function / locking, unlocking dual-locking (all doors) / locking all
the doors.

Body Electric

Central Locking

11-335

Step 1

Check the remote locking.

Is the remote locking working?

Yes

Go to step 3

No

Step 2

Check remote anti-theft system for possible malfunction.

(a)

Check and repair the remote anti-theft system for possible
malfunction

Is the remote locking working?

Yes

System normal

No

Step 3

Check the mechanical key or the control button locking.

1

2

3

4

5

6

7

8

9 10

20

30

40

19

29

39

18

28

38

17

27

37

16

26

36

15

25

35

14

24

34

13

23

33

12

22

32

11

21

31

Body Control Module 1 Harness Connector IP29

FE11-5802b

(a)

Use the mechanical key or the left front combination switch
to repeatedly lock and unlock, at the same time measure the
BCM harness connector IP29 terminal No.37 voltage with a
multimeter.

Is the voltage between 0 V and 10 V?

Yes

Go to step 10

No

Step 4

Check the left front door lock assembly.

1

6

7

8

9

10

2

3

4

5

Left Front Door Lock Motor Harness 
Connector DR06

FE11-5803b

(a)

Remove the left front door lock assembly. Refer to

11.9.8.1

 

Left Front Door Lock Assembly Replacement

.

(b)

Simulate the mechanical key locking action, measure
resistance between the left front door lock assembly DR06
terminals No.4 and 8 with a multimeter.
Standard Resistance: Less than 1 Ω

Is the resistance specified value?

Yes

Go to step 6

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Central Locking

Body Electric