Infiniti FX35, FX50 (S51). Manual - part 486

POWER SUPPLY AND GROUND CIRCUIT

DLK-67

< DTC/CIRCUIT DIAGNOSIS >

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POWER SUPPLY AND GROUND CIRCUIT

BCM (BODY CONTROL MODULE)

BCM (BODY CONTROL MODULE) : Diagnosis Procedure

INFOID:0000000005239536

1.

CHECK FUSE AND FUSIBLE LINK

Check that the following fuse and fusible link are not fusing.

Is the fuse fusing?

YES

>> Replace the blown fuse or fusible link after repairing the affected circuit if a fuse or fusible link is

blown.

NO

>> GO TO 2.

2.

CHECK POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect BCM connectors.

3.

Check voltage between BCM harness connector and ground.

Is the measurement value normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness.

3.

CHECK GROUND CIRCUIT

Check continuity between BCM harness connector and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair or replace harness.

BACK DOOR CONTROL UNIT

BACK DOOR CONTROL UNIT : Diagnosis Procedure

INFOID:0000000005239537

1.

CHECK FUSE

Check that the following fuse is not fusing.

Is the fuse fusing?

YES

>> Replace the blown fuse after repairing the affected circuit if a fuse is blown.

NO

>> GO TO 2.

2.

CHECK POWER SUPPLY CIRCUIT

Terminal No.

Signal name

Fuse and fusible link No.

1

Battery power supply

L

11

10

(+)

(

−

)

Voltage

(Approx.)

BCM

Connector

Terminal

M118

1

Ground

Battery voltage

M119

11

BCM

Ground

Continuity

Connector

Terminal

M119

13

Existed

Fuse No.

Signal name

35

Battery power supply

DLK-68

< DTC/CIRCUIT DIAGNOSIS >

POWER SUPPLY AND GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect back door control unit connector.

3.

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

Is the measurement value normal?

YES

>> GO TO 3.

NO

>> Repair or replace harness.

3.

CHECK GROUND CIRCUIT

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

Does continuity exist?

YES

>> INSPECTION END

NO

>> Repair or replace harness.

(+)

(

−

)

Voltage

(Approx.)

Back door control unit

Connector

Terminal

D123

3

Ground

Battery voltage

Back door control unit

Ground

Continuity

Connector

Terminal

D123

7

Existed

8

DOOR SWITCH

DLK-69

< DTC/CIRCUIT DIAGNOSIS >

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DOOR SWITCH

Description

INFOID:0000000005239538

Detects door open/close condition.

Component Function Check

INFOID:0000000005239539

1.

CHECK FUNCTION

With CONSULT-III

Check door switches (“DOOR SW-DR”, “DOOR SW-AS”, “DOOR SW-RL”, “DOOR SW-RR”, and “DOOR SW-
BK”) in Data Monitor” mode using CONSULT-III.

Is the inspection result normal?

YES

>> Door switch is OK.

NO

>> Refer to 

DLK-69, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005239540

1.

CHECK DOOR SWITCH INPUT SIGNAL

1.

Turn ignition switch OFF.

2.

Disconnect malfunctioning door switch connector.

3.

Check signal between malfunctioning door switch harness connector and ground using an oscilloscope.

Monitor item

Condition

DOOR SW-DR

CLOSE 

→

 OPEN: OFF 

→

 ON

DOOR SW-AS

DOOR SW-RL

DOOR SW-RR

DOOR SW-BK

DLK-70

< DTC/CIRCUIT DIAGNOSIS >

DOOR SWITCH

Is the inspection result normal?

YES-1 >> Back door: GO TO 3.
YES-2 >> Other doors: GO TO 4.
NO

>> GO TO 2.

2.

CHECK DOOR SWITCH CIRCUIT 

1.

Disconnect BCM connector.

2.

Check continuity between BCM harness connector and door switch harness connector.

3.

Check continuity between BCM harness connector and ground.

(+)

(–)

Signal

(Reference value)

Door switch

Connector

Terminal

Driver side

B16

2

Ground

Passenger side

B216

2

Rear LH

B23

2

Rear RH

B223

2

Back door

D122

7

Battery voltage

JPMIA0594GB

JPMIA0594GB

JPMIA0594GB

JPMIA0594GB

BCM

Door switch

Continuity 

Connector

Terminal

Connector

Terminal

M123

150

B16 (Driver side)

2

Existed

124

B216 (Passenger side)

M121

69

B23 (Rear LH)

68

B223 (Rear RH)

66

D122 (Back door)

7