(a)  Inspect and repair the open circuit 

between the right front position 
light harness connector CA12 
terminal 5 and the body ground. 

Confirm if the position light is working 
correctly. 

9

6

5

1

2

3

4

7

8

NL11-0009c

左前组合灯线束连接器 CA12

 

 

 

 

 

10 

Inspect position lamp relay IR08 circuit. 

(a)  Turn off the ignition switch. 

(b)  Unplug position light relay IR08. 

(c)  Disconnect the light combination switch harness connector. 

(d)  Measure the resistance between terminal 1 of position light relay IR08 and fuse F05. 

(e)  Measure the resistance between terminal 3 of position light relay IR08 and fuse F05. 

(f)  Measure the resistance between terminal 2 of position light relay IR08 and terminal 19 of BCM harness 

connector IP61. 

Standard Resistance: Less than 1 Ω 

Is the resistance specified value? 

 

 

 

11 

Check the light combination switch ground circuit. 

No 

Yes 

The system is normal. 

No 

Repair or replace faulty circuit 

Yes 

Left front combination lamp harness 

connectorCA12

 

1975

 
 

(a)  Turn off the ignition switch. 

(b)  Disconnect the light combination switch harness 

connector. 

(c)  Measure the resistance between terminal 16 of 

light combination switch corresponding with 
harness connector IP42 and body reliable ground.

Standard Resistance: Less than 1 Ω 

Is the resistance specified value? 

1

9

2

3

4 5

6

7

8

14 15 16 17

10 11 12 13

NL11-0010c

灯光组合开关线束连接器

IP42

 

 

 

12 

Check the light combination switch. 

 

(a)  Turn off the ignition switch. 

(b)  Disconnect the light combination switch harness 

connector. 

(c)  Disconnect the light combination switch harness 

connector. 

(d)  Measure the resistance between terminal 14 and 

16 of light combination switch corresponding 
with harness connector IP42. 

Standard Resistance: Less than 1 Ω 

Is the resistance specified value? 

1

9

2

3

4 5

6

7

8

14 15 16 17

10 11 12 13

NL11-0011c

灯光组合开关线束连接器

IP42

 

 

 

 

13 

Check continuity of light combination switch and BCM. 

(a)  Turn the ignition switch to OFF position. 

(b)  Disconnect the BCM harness connector IP61. 

(c). Disconnect the light combination switch harness connector IP42. 

(e)  Measure the resistance between terminal 19 of BCM harness connector IP61 and terminal 14 of harness 

No 

Replace combination switch 

Yes 

No 

Repair or replace faulty circuit 

Yes 

Lighting combination switchharness 

connectorIP42

 

Lighting combination switchharness 

connectorIP42

 

1976

 
 

connector IP42 of light combination switch. 

Standard Resistance: Less than 1 Ω 

Is the resistance specified value? 

 

 

 

14 

Replace the BCM 

 

 

15 

The system is normal. 

Note: Taking diagnostic steps of left front position light for example, fault diagnosis of other three position 
lights can refer to left front position light. 

 

Next 

No 

Repair or replace faulty circuit 

Yes 

1977

 
 

 

10.3.3.4 DTC B11B312. B11B312 

Fault diagnosis code Descriptions 

B11B312 

License Plate Light Circuit Malfunction 

B11B311 

License Plate Light Circuit Malfunction 

Circuit diagram: 

SO44

1

SO44

2

SO41

1

SO41

2

IF

26

牌照灯继电器

左牌照灯

右牌照灯

NL11-0012c

蓄电池

1

2

3

5

位置灯
开关

BCM

16 IP63

IP61

34

14 IP42

OFF
位置

16 IP42

 

Diagnostic Steps: 

1 

Use fault diagnosis tester active test function to check the license plate light working status. 

A.  Select as the following sequence: Body Control Module/active test/external light control output/license plate 

light. 

Is license plate light lit? 

 

 

 

2 

Check position light bulb 

A.  Remove position light bulb 

Is the bulb filament blown? 

 

 

 

No 

Go to step 4 

Yes 

Yes 

Go to step 10 

No 

Left license lamp

License lamprelay

Right license lamp

Position 

lamp switch

Position

Battery

 

1978