10.2.4.5 DTC B1205 B1206 

Fault diagnosis code Descriptions 

B1205 

License plate lamp is in open-circuit fault. 

B1206 

License plate lamp is shorted to ground failure. 

Circuit diagram: 

NL11-3206b

1 SO41

2 SO41

1 SO44

2 SO44

LICENSE

POS-LAMP

8 IP49

左牌照灯

右牌照灯

BCM

 

Diagnostic Steps: 

1 

Check any fault code except forB1205 B1206 

(a)  Check if any fault code exist except for B1205 B1206 

 

 

 

 

2 

Measure the voltage of the license plate lamp. 

Yes 

Go to 

(DTC) list in 10.2.4.2

 and repair according 

to trouble codes.

No 

left 

license 

lamp 

right 

license 

lamp

1903

 
 

(a)  Turn the ignition switch to ON position. 

(b)  Turn on lighting combination switch. 

(c)  Measure voltage of left license lamp harness 

connector SO41 terminal1, right license brake 
lamp harness connector SO44 terminal. 

Standard Voltage: 11-14 V 

Confirm if the voltage conforms to standard value. 

NL11-3207b

2

1

2

1

S041左牌照灯线束连接器

S044右牌照灯线束连接器

 

 

 

 

3 

Inspect the bulb. 

(a)  Inspect whether licence lamp bulb is burned out. 

Confirm whether the license plate lamp bulb is blown out. 

 

 

 

 

4 

Inspect the communication between BCM and license plate 
lamp. 

No 

Go to step 4 

Yes 

Yes 

Replace the bulb   

No 

SO41 left license lamp harness connector

 

SO44 right license lamp harness connector

 

1904

 
 

(a)  Turn the ignition switch to OFF position. 

(b)  Disconnect BCM harness connector IP49. 

(c) Disconnect  licence lamp wire harness 

connector SO41, SO44. 

(d) Measure resistance between BCM wire 

harness connector IP49 terminal 8 and license 
lamp wire harness connector SO41 terminal 1.

(e) Measure resistance between BCM wire 

harness connector IP49 terminal 8 and license 
lamp wire harness connector SO44 terminal 1.

Standard Resistance: Less than 1 Ω 

Confirm if the resistance conforms to standard 
value. 

NL11-3208b

2

1

2

1

S041左牌照灯线束连接器

S044右牌照灯线束连接器

IP49BCM线束连接器

1 2 3

4 5 6

7 8 9

10 11 12 13

 

 

 

 

 

5 

Inspect the communication between the license plate lamp 
and grounding. 

(a)  Disconnect license lamp harness connector 

SO41, SO44. 

(b)  Measure resistance between license lamp 

wire harness connector RF12 terminal 2 and 
BCM wire harness connector IP49 terminal 
3. 

(c)  Measure resistance value between license 

lamp harness connector SO44 terminal2 and 
grounding. 

Standard Resistance: Less than 1 Ω 

(d)  Measure the resistance between terminal 1 

of license lamp harness connector SO41 and 
grounding. 

(e)  Measure resistance value between license 

lamp harness connector SO44 terminal1 and 
grounding. 

Standard Resistance: More than 10 Ω or higher 

NL11-3209b

2

1

2

1

S041左牌照灯线束连接器

S044右牌照灯线束连接器

 

No 

Repair or replace the harness. 

Yes 

SO41 left license lamp harness connector

 

SO44 right license lamp harness connector

 

IP49BCMharness connector

 

SO41 left license lamp harness connector

 

SO44 right license lamp harness connector

 

1905

 
 

Confirm if the resistance conforms to standard 

value. 

 

 

 

 

6 

Replace the BCM 

(a)  Replace BCM and refer to 

Replacement of BCM in 11.8.8.1

. 

Confirm the completion of repair. 

 

 

7 

The system is normal. 

 

 

No 

Repair or replace the harness. 

Yes 

Next 

1906