10.2.4.7 DTC B1209 B1210 

Fault diagnosis code Descriptions 

B1209 

Right front/right rear steering lamp，One of both has open circuit fault 

B1210 

The right front and right rear steering lamps are shorted to ground. 

Circuit diagram: 

NL11-3210b

6 SO31

3 SO31

8 CA12

8 IP48

9 IP48

5 CA12

8 CA18

5 CA18

6 SO24

3 SO24

左后组合灯
(左转向灯)

左前组合大灯
(左转向灯）

右前组合大灯
(右转向灯）

右后组合灯
(右转向灯）

BCM

TURN-LH LAMP

TURN-RH LAMP

 

Diagnostic Steps: 

1 

Check any fault code except forB1209 B1210 

(a)  Check if any fault code exists except for B1209 B1210 

 

 

 

 

2 

Measure right steering lamp voltage. 

Yes 

Go to

 DTC list in 10.2.4.2

 and repair according to 

trouble codes. 

No 

Left rear 

combinati

on lamp 

(left 

steering 

lamp) 

Left front 

combination 

headlamp (left 
steering lamp) 

Right front 
combinatio

n headlamp 

(right 

steering 

lamp)

Right 

rearcombinatio

n lamp (right 

steering lamp) 

1911

 
 

(a)  Turn the ignition switch to ON position. 

(b)  Turn on right turning lamp. 

(c) Measure right front steering lamp harness 

connector CA18 terminal8, right rear steering 
lamp harness connector SO24 terminal6. 

Standard Voltage: 11-14 V 

NL11-3214b

9

8

7

4

3

2

6

5

1

1

2

6

3

4

5

CA18右前组合灯线束连接器

SO24右后组合灯线束连接器

 

 

 

 

3 

Inspect the bulb. 

(a)  Check if the bulb of turning light is blown. 

Is the bulb filament blown? 

 

 

 

 

4 

Inspect the communication among the BCM, the right front 
steering lamp and the right rear steering lamp. 

No 

Go to step 4 

Yes 

Yes 

Replace the bulb. 

No 

CA18 right front combination lamp harness connector

SO24 right rearcombination lamp harness connector

1912

 
 

(a) Turn the ignition switch to OFF 

position. 

(b)  Disconnect BCM harness connector 

IP48. 

(c)  Disconnect the steering lamp harness 

connectorCA18、SO24. 

(d) Measure resistance between BCM 

wire harness connector IP48 terminal 9 
and license lamp wire harness 
connector CA12 terminal 8. 

(e) Measure resistance between BCM 

wire harness connector IP48 terminal 9 
and license lamp wire harness 
connector SO24 terminal 6. 

Standard Resistance: Less than 1 Ω 

Confirm if the resistance conforms to 
standard value. 

NL11-3215b

9

8

7

4

3

2

6

5

1

1

2

6

3

4

5

CA18右前组合灯线束连接器

IP48BCM线束连接器

SO24右后组合灯线束连接器

1 2 3

4 5 6

7 8 9

10 11 12 13

 

 

 

 

 

5 

Inspect the communication among the right front steering lamp, the 
right rear steering lamp and grounding. 

No 

Repair or replace the harness. 

Yes 

IP48BCMharness connector

 

CA18 right front combination lamp harness connector

 

SO24 right rearcombination lamp harness connector

 

1913

 
 

(a)  Disconnect steering lamp harness 

connector CA18, SO24. 

(d)  Measure the resistance between 

terminal 5 of license lamp harness 
connector CA18 and grounding. 

(c) 

Measure resistance between 
license lamp wire harness 
connector SO24 terminal 3 and 
grounding. 

Standard Resistance: Less than 1 Ω 

(d)  Measure the resistance between 

terminal 8 of license lamp harness 
connector CA18 and grounding. 

(e) 

Measure resistance between 
license lamp wire harness 
connector SO24 terminal 6 and 
grounding. 

Standard Resistance: More than 10 Ω 
or higher 

Confirm if the resistance conforms to 

standard value. 

NL11-3216b

9

8

7

4

3

2

6

5

1

1

2

6

3

4

5

CA18右前组合灯线束连接器

SO24右后组合灯线束连接器

 

 

 

 

 

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 

CA18 right front combination lamp harness connector

 

SO24 right rearcombination lamp harness connector

 

1914