Infiniti QX56 (Z62). Manual - part 408

DLK-98

< DTC/CIRCUIT DIAGNOSIS >

B2422 BACK DOOR STATE

B2422 BACK DOOR STATE

DTC Logic

INFOID:0000000006225899

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON. 

2.

Check “Self Diagnostic Result” mode of “AUTOMATIC BACK DOOR CONTROL UNIT” using CONSULT-
III.

Is DTC detected?

YES

>> Refer to 

DLK-98, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006225900

1.

REPLACE AUTOMATIC BACK DOOR CONTROL MODULE

When DTC [B2422] is detected, replace automatic back door control module.

>> Replace automatic back door control module. Refer to 

DLK-262, "Removal and Installation"

.

DTC

CONSULT-III display 

description

DTC detecting condition

Possible cause

B2422

BACK DOOR STATE

When the automatic back door control unit detects 
back door position malfunction according to the 
pulse signal

• Back door mechanism
• Automatic back door control mod-

ule

B2423 AUTOMATIC BACK DOOR MOTOR OPERATION TIME

DLK-99

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

L

M

A

B

DLK

N

O

P

B2423 AUTOMATIC BACK DOOR MOTOR OPERATION TIME

DTC Logic

INFOID:0000000006225901

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON. 

2.

Check “Self Diagnostic Result” mode of “AUTOMATIC BACK DOOR CONTROL UNIT” using CONSULT-
III.

Is DTC detected?

YES

>> Refer to 

DLK-99, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006225902

1.

CHECK AUTOMATIC BACK DOOR CONTROL MODULE POWER SUPPLY AND GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Check automatic back door control module power supply and ground circuit.
Refer to 

DLK-116, "AUTOMATIC BACK DOOR CONTROL UNIT : Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> Replace automatic back door control module. Refer to 

DLK-262, "Removal and Installation"

.

NO

>> Repair or replace the malfunctioning parts.

DTC

CONSULT-III display de-

scription

DTC detecting condition

Possible cause

B2423

ABD MTR TIME OUT

When the automatic back door control unit and au-
tomatic back door motor operate in the same direc-
tion for 30 seconds or more continuously

• Back door mechanism
• Automatic back door control 

module

• Battery voltage (low battery)

DLK-100

< DTC/CIRCUIT DIAGNOSIS >

B2424 CLOSURE CONDITION

B2424 CLOSURE CONDITION

DTC Logic

INFOID:0000000006225903

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON. 

2.

Check “Self Diagnostic Result” mode of “AUTOMATIC BACK DOOR CONTROL UNIT” using CONSULT-
III.

Is DTC detected?

YES

>> Refer to 

DLK-100, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006225904

1.

CHECK OPEN/CLOSE SWITCH SIGNAL

1.

Select “AUTOMATIC BACK DOOR CONTROL UNIT” using CONSULT-III.

2.

Select “CLOSE SW”, “OPEN SW” in “DATA MONITOR” mode.

3.

Check that the function operates normally according to the following conditions.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 2.

2.

CHECK AUTOMATIC BACK DOOR CONTROL MODULE OUTPUT

1.

Turn ignition switch OFF.

2.

Disconnect back door lock assembly connector.

3.

Check voltage between back door lock assembly harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

CHECK OPEN/CLOSE SWITCH CIRCUIT

1.

Disconnect automatic back door control module connector.

DTC

CONSULT-III display de-

scription

DTC detecting condition

Possible cause

B2424

CLSR CONDITION

When the following conditions are detected after 
OPEN/CLOSE operation of the back door closure 
motor
• Open switch and close switch are ON 

• Harness or connector

(Open switch or close switch 
circuit is open or shorted)

• Back door lock assembly

Monitor item

Condition

Status

OPEN SW

Back door

Half latch/fully closed

OFF

Open

ON

CLOSE SW

Open/half latch

OFF

Fully closed

ON

(+)

(–)

Voltage

(Approx.)

Back door lock assembly

Connector

Terminal

D157

4

Ground

Battery voltage

5

B2424 CLOSURE CONDITION

DLK-101

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

L

M

A

B

DLK

N

O

P

2.

Check continuity between automatic back door control module harness connector and back door lock
assembly harness connector.

3.

Check continuity between automatic back door control module harness connector and ground.

Is the inspection result normal?

YES

>> Replace automatic back door control module. Refer to 

DLK-262, "Removal and Installation"

.

NO

>> Repair or replace harness.

4.

CHECK GROUND CIRCUIT

Check continuity between back door lock assembly harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace harness.

5.

CHECK OPEN/CLOSE SWITCH

Refer to 

DLK-101, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace back door lock assembly.

6.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-40, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000006225905

COMPONENT INSPECTION

1.

CHECK OPEN/CLOSE SWITCH

1.

Turn ignition switch OFF.

2.

Disconnect back door lock assembly.

3.

Check continuity between back door lock assembly terminals.

Automatic back door control module

 Back door lock assembly

Continuity 

 Connector

Terminal

Connector

Terminal

B26

19

D157

5

Existed

20

4

Automatic back door control module

Ground

Continuity 

 Connector

Terminal

B26

19

Not existed

20

Back door lock assembly 

Ground

Continuity 

Connector

Terminal

D157

8

Existed

Back door lock assembly

Condition

Continuity

Terminal

5

8

Back door lock

Fully closed

Existed

Open/half latch

Not existed

4

Open

Existed

Fully closed/half latch

Not existed