Infiniti QX56 (Z62). Manual — part 407

DLK-94

< DTC/CIRCUIT DIAGNOSIS >

B2419 OPEN SWITCH

NO

>> Replace back door lock assembly.

B2420 CLOSE SWITCH

DLK-95

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

L

M

A

B

DLK

N

O

P

B2420 CLOSE SWITCH

DTC Logic

INFOID:0000000006225894

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-95, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006225895

1.

CHECK CLOSE SWITCH SIGNAL

1.

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

2.

Select “CLOSE 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 SIGNAL

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 CLOSE SWITCH CIRCUIT

1.

Disconnect automatic back door control module connector.

2.

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

DTC

CONSULT-III display

description

DTC detecting condition

Possible cause

B2420

CLOSE SW

When the automatic back door control unit detects
any of the following conditions
• The change of close switch cannot be detected

for 3 second or more after starting the closure
close output for the 3rd time in a row

• Close switch
• Harness or connectors

(Close switch circuit is open or
shorted)

• Automatic back door control mod-

ule

Monitor item

Condition

Status

CLOSE SW

Back door

Open/Half latch

OFF

Fully closed

ON

(+)

(–)

Voltage

(Approx.)

Back door lock assembly

Connector

Terminal

D157

5

Ground

Battery voltage

DLK-96

< DTC/CIRCUIT DIAGNOSIS >

B2420 CLOSE SWITCH

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 CLOSE SWITCH 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 CLOSE SWITCH

Refer to

DLK-95, "Diagnosis Procedure"

.

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:0000000006225896

COMPONENT INSPECTION

1.

CHECK CLOSE SWITCH

1.

Turn ignition switch OFF.

2.

Disconnect back door lock assembly.

3.

Check continuity between back door lock assembly terminals.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace back door lock assembly.

Automatic back door control module

Back door lock assembly

Continuity

Connector

Terminal

Connector

Terminal

B26

19

D157

5

Existed

Automatic back door control module

Ground

Continuity

Connector

Terminal

B26

19

Not existed

Back door lock assembly

Ground

Continuity

Connector

Terminal

D157

8

Existed

Back door lock assembly

Condition

Continuity

Terminal

5

8

Back door

Fully closed

Existed

Open/Half latch

Not existed

B2421 CLUTCH OPERATION TIME

DLK-97

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

L

M

A

B

DLK

N

O

P

B2421 CLUTCH OPERATION TIME

DTC Logic

INFOID:0000000006225897

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-97, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006225898

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

description

DTC detecting condition

Possible cause

B2421

CLUTCH TIME OUT

When the automatic back door control unit detects
the power distribution to the clutch for 2 minutes or
more

• Automatic back door control mod-

ule

• Battery voltage (low voltage)