(a)  Turn on left rear glass lifter switch to lift left 

rear glass. 

(b)  Measure voltage of left rear side glass lift 

motor harness connector DR23 terminal. 

Standard Voltage: 11-14 V 

Is voltage the Standard Value? 

DR23左后侧玻璃升降电机线束连接器

A

B

NL11-3230b

 

   

 

 

 

3 

Inspect the downshift voltage of the left rear side glass lifting 
motor. 

(a)  Turn on left rear glass lifter switch to lower 

left rear glass. 

(b)  Measure voltage of left rear side glass lift 

motor harness connector DR23 terminal 

Standard Voltage: 11-14 V 

Is voltage the Standard Value? 

DR23左后侧玻璃升降电机线束连接器

A

B

NL11-3231b

 

   

 

 

 

4 

Inspect the communication of the left rear glass lifting motor 
and the BCM. 

No 

Go to step 4 

Yes 

Yes 

Go to step 5 

No 

DR23 left rear side glass lifting motor harness 

connector

 

DR23Left rear side glass lifting motor harness 

connector

 

1939

 
 

(a)  Turn the ignition switch to OFF position. 

(b)  Disconnect left front glass lift motor harness 

connector DR23. 

(c)  Disconnect BCM harness connector IP47. 

(d)  Measure left rear glass lifter motor wire 

harness connector DR23 terminal A and 
BCM wire harness connector IP47 terminal 
4. 

(e)  Measure resistance between left rear glass 

lifter motor wire harness connector DR23 
terminal B and BCM wire harness connector 
IP47 terminal 12. 

Standard Resistance: Less than 1 Ω 

Is the resistance at a specified value? 

DR23左后侧玻璃升降电机线束连接器

IP47BCM线束连接器

A

B

5 6 7 8

9 10 11 12

13

14 15 16 17

1

2 3 4

NL11-3232b

 

 

 

 

 

5 

Replace left rear side glass lift motor, 

(a)  Replace left rear side glass lift motor; refer to

11.4.8.11 rear door glass lift motor replacement

. 

(b)  Clear DTC, and read DTC again 

Whether fault code exists or not , 

 

 

 

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. 

 

Next 

Yes 

Go to step 6 

No 

No 

The system is normal. 

Yes 

IP47BCMharness connector

 

DR23Left rear side glass lifting motor harness 

connector

 

1940

 
 

10.2.4.18 DTC B1222 

Fault diagnosis code Descriptions 

B1222   

Open circuit incurs on right rear electric window driving. 

Circuit diagram: 

12

10 IP47

2 IP47

B

M

DR23

A DR23

左后门升降电机

右后门升降电机

4 IP47

IP47

B

M

DR33

A DR33

RL-WINDOW

DOWN

RL-WINDOW UP

BCM

RR-WINDOW

DOWN

RR-WINDOW-UP

NL11-3229b

 

Diagnostic Steps: 

1 

Inspect whether there is any DTC Code other than B1222. 

(a)  Inspect whether there is any DTC Code other than B1222. 

 

 

 

2 

Inspect the upshift voltage of the right rear side glass lifting 
motor. 

Yes 

Go to

 DTC list in 10.2.4.2

 and 

repair according to trouble 
codes. 

No 

Left rear door 

lifting motor

Right reardoor 

lifting motor

1941

 
 

(a)  Turn on right rear glass lifter switch to lift 

right rear glass. 

(b)  Measure voltage of right rear side glass lift 

motor harness connector DR33 terminal. 

Standard Voltage: 11-14 V 

Is voltage the Standard Value? 

DR33右后侧玻璃升降电机线束连接器

A

B

NL11-3233b

 

 

 

 

 

3 

Inspect the down shift voltage of the right rear side glass lifting 
motor. 

(a)  Turn on right rear glass lifter switch to 

lower right rear glass. 

(b)  Measure voltage of right rear side glass lift 

motor harness connector DR33 terminal. 

Standard Voltage: 11-14 V 

Is voltage the Standard Value? 

DR33右后侧玻璃升降电机线束连接器

A

B

NL11-3234b

 

 

 

 

 

4 

Inspect the communication of the left rear glass lifting motor and the BCM. 

 

No 

Go to step 4 

Yes 

Yes 

Go to step 5 

No 

DR33Right rearside glass lifting motor harness 

connector

 

DR33Right rearside glass lifting motor harness 

connector

 

1942