Infiniti FX35, FX50 (S51). Manual - part 497

OPEN SWITCH

DLK-111

< DTC/CIRCUIT DIAGNOSIS >

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DLK

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OPEN SWITCH

Description

INFOID:0000000005239624

The open switch is integrated in the back door lock assembly, and it detects the open condition of the back
door lock.

Diagnosis Procedure

INFOID:0000000005239625

1.

CHECK BACK DOOR CONTROL UNIT 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 3.

NO

>> GO TO 2.

2.

CHECK OPEN SWITCH CIRCUIT

1.

Disconnect back door control unit connector.

2.

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

3.

Check continuity between back door control unit harness connector and ground.

Is the inspection result normal?

YES

>> Replace back door control unit. Refer to 

DLK-285, "Removal and Installation"

.

NO

>> Repair or replace harness.

3.

CHECK OPEN SWITCH GROUND CIRCUIT

Check continuity between back door lock assembly connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace harness.

4.

CHECK OPEN SWITCH

Refer to 

DLK-112, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace back door lock assembly. Refer to 

DLK-277, "Removal and Installation"

.

(+)

(–)

Voltage (V)

(Approx.)

Back door lock assembly

 Connector

Terminal

D122

4

Ground

Battery voltage

Back door control unit

 Back door lock assembly

Continuity 

Connector

Terminal

Connector

Terminal

D123

5

D122

4

Existed

Back door control unit

Ground

Continuity 

Connector

Terminal

D123

5

Not existed

Back door lock assembly 

Ground

Continuity 

Connector

Terminal

D122

8

Existed

DLK-112

< DTC/CIRCUIT DIAGNOSIS >

OPEN SWITCH

5.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-36, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000005239626

COMPONENT INSPECTION

1.

CHECK OPEN SWITCH

Check back door lock assembly (open switch).

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace back door lock assembly. Refer to 

DLK-277, "Removal and Installation"

.

Terminal

Condition

Continuity

Back door lock assembly (open switch)

4

8

Back door lock

Open

Existed

Fully closed/Half latch

Not existed

CLOSE SWITCH

DLK-113

< DTC/CIRCUIT DIAGNOSIS >

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DLK

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CLOSE SWITCH

Description

INFOID:0000000005239627

The close switch is integrated in the back door lock assembly, and it detects the close condition of the back
door lock.

Diagnosis Procedure

INFOID:0000000005239628

1.

CHECK BACK DOOR CONTROL UNIT 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 3.

NO

>> GO TO 2.

2.

CHECK CLOSE SWITCH CIRCUIT

1.

Disconnect back door control unit connector.

2.

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

3.

Check continuity between back door control unit harness connector and ground.

Is the inspection result normal?

YES

>> Replace back door control unit. Refer to 

DLK-285, "Removal and Installation"

.

NO

>> Repair or replace harness.

3.

CHECK CLOSE SWITCH GROUND CIRCUIT

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

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace harness.

4.

CHECK CLOSE SWITCH

Refer to 

DLK-114, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace back door lock assembly. Refer to 

DLK-277, "Removal and Installation"

.

(+)

(–)

Voltage (V)

(Approx.)

Back door lock assembly

Connector

Terminal

D123

5

Ground

Battery voltage

Back door control unit

 Back door lock assembly

Continuity 

 Connector

Terminal

Connector

Terminal

D123

1

D122

5

Existed

Back door control unit

Ground

Continuity 

 Connector

Terminal

D123

1

Not existed

Back door lock assembly 

Ground

Continuity 

Connector

Terminal

D122

8

Existed

DLK-114

< DTC/CIRCUIT DIAGNOSIS >

CLOSE SWITCH

5.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-36, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000005239629

COMPONENT INSPECTION

1.

CHECK CLOSE SWITCH

Check back door lock assembly (close switch).

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace back door lock assembly. Refer to 

DLK-277, "Removal and Installation"

.

Terminal

Condition

Continuity

Back door lock assembly (close switch)

5

8

Back door lock position

Fully closed

Existed

Open/Half latch

Not existed