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. 

B1211 

The indoor dome lamp is in short circuit until the battery is broken 

down. 

B1212 

The key hole illumination lamp is shorted to battery fault. 

B1213 

If not detecting the stop bit signal within 8S consecutively the front 

wiper faults. 

B1214 

If detecting the stop bit signal within 8S consecutively the front wiper 

faults. 

B1215 

A horn relay controls short circuit until a battery faults. 

B1216 

A headlamp relay controls short circuit until a battery faults. 

B1217 

Open circuit incurs on driver-side electric window driving. 

B1218 

Open circuit incurs on co-pilot-side electric window driving. 

B1220 

Open circuit incurs on left rear electric window driving. 

B1222 

Open circuit incurs on right rear electric window driving. 

B1224 

Driver-side electric window anti-trapping module HALL sensor faults.

B1225 

Driver-side electric window motor relay faults. 

B1227 

Co-pilot-side electric window motor relay faults. 

B1231 

Left rear electric window motor relay faults. 

B1234 

Left rear electric window motor relay faults. 

B1236 

Rain sensor fault 

B1237 

Sunlight sensor fault 

U1000 

Communication error of driver-side electric window LIN 

U1004 

Light rain sensor LIN communication error 

U1005 

BCM LIN communication error 

 

1895

 
 

 

10.2.4.3 DTC B1201 B1202 

Display Descriptions 

B1201 

Open circuit of left stop lamp 

B1202 

Left stop lamp short circuit to ground fault 

Circuit diagram: 

9 CA12

5 CA12

9 CA18

5 CA18

2 SO24

3 SO24

LH-LAMP

RH-LAMP

10 IP49

20 IP49

2 SO31

3 SO31

BCM

左前组合

大灯
(位置灯)

右前组合

大灯
(位置灯)

右后组合

大灯
(位置灯)

左后组合

大灯
(位置灯)

NL11-3251b

 

Diagnostic Steps: 

1 

Inspect whether there is any fault code except B1201 and B1202. 

(a)  Check if any fault code exist except for B1201 B1202 

 

 

 

2 

Measure left stop lamp voltage. 

Yes 

Go to

 

(DTC) list in 10.2.4.2

 and repair according 

to trouble codes. 

No 

Left front 

combinatio

n headlamp 

(position 

lamp) 

Left rear 

combinatio

n headlamp 

(position 

lamp) 

Right 

rearcombination 

headlamp 

(position lamp)

Right front 

combination 

headlamp 

(position lamp) 

1896

 
 

 

(a)  Measure voltage between left front parking lamp 

wire harness connector CA12 terminal 9, left rear 
parking lamp wire harness connector SO31 
terminal 2. 

Standard Voltage: 11-14 V 

 

1

2

3

4

5

6

S031左后位置灯线束连接器

NL11-3200b

9

6

5

1

2

3

4

7

8

CA12左前位置灯线束连接器

 

 

 

3 

Inspect the bulb. 

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

Confirm whether the parking lamp bulb is blown out. 

 

 

 

 

 

4 

Repair the communication between the BCM and the left 
parking lamp. 

No 

Go to step 4 

Yes 

Yes 

Replace the bulb. 

No 

SO31 left rear position lamp harness connector

CA12 left front position lamp harness connector

1897

 
 

(a)  Turn the ignition switch to OFF position. 

(b) Disconnect BCM wire harness connector 

IP49. 

(c)  Disconnect the left front stop lamp harness 

connector CA12。 

(d) Disconnect left rear stop lamp harness 

connector SO31. 

(e) Measure resistance between BCM wire 

harness connector IP49 terminal 10 and left 
front parking lamp wire harness connector 
CA12 terminal 9. 

(f) Measure resistance between BCM wire 

harness connector IP49 and left rear parking 
lamp wire harness connector SO31 terminal 
2. 

Standard Resistance: Less than 1 Ω 

Confirm if the resistance conforms to standard 

value. 

NL11-3201b

9

6

5

1

2

3

4

7

8

1

2

3

4

5

6

1

2 3

4 5 6

7

8 9 10

11 12 13 14 15 16 17 18 19 20

SO31左后位置灯线束连接器

IP49BCM线束连接器

CA12左前位置灯线束连接器

 

 

 

 

 

5 

Inspect the communication between the left parking lamp and 
grounding. 

(a)  Disconnect left front stop lamp harness 

connector CA12. 

(b) Measure resistance value between Left 

front stop lamp harness connector CA12 
terminal5 and grounding 

(c) Disconnect the rear stop lamp harness 

connector SO31。 

(d) Measure left rear parking lamp wire 

harness connector SO31 terminal 3 and 
grounding. 

Standard Resistance: Less than 1 Ω 

(e) Measure resistance between left front 

parking lamp wire harness connector CA12 
terminal 9. 

(f) Measure resistance between left rear 

parking lamp wire harness connector SO31 
terminal 2 and grounding. 

1

2

3

4

5

6

S031左后位置灯线束连接器

NL11-3202b

CA12左前位置灯线束连接器

9

6

5

1

2

3

4

7

8

 

No 

Repair or replace the harness. 

Yes 

SO31 left rear position lamp harness connector

 

IP49BCMharness connector

 

CA12 left front position lamp harness connector

 

SO31left rear position lamp harness connector

 

CA12 left front position lamp harness connector

 

1898