Infiniti FX35, FX50 (S51). Manual - part 1214

INL-56

< DTC/CIRCUIT DIAGNOSIS >

HOSPITALITY ILLUMINATION CIRCUIT

3.

CHECK EACH ILLUMINATION POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect each illumination connectors.

3.

Turn ignition switch ON.

4.

Check voltage between each illumination harness connectors and ground.

Is the measurement value normal?

YES

>> GO TO 4.

NO

>> Check the hospitality lighting power supply circuit 3. Refer to 

INL-31, "Diagnosis Procedure"

.

4.

CHECK ILLUMINATION CONTROL CIRCUIT FOR OPEN

1.

Turn ignition switch OFF.

2.

Disconnect the total illumination control unit connector.

3.

Check continuity between the total illumination control unit harness connector and each illumination har-
ness connectors.

Illuminations

Ground

Voltage

(Approx.)

Connector

Terminal

Meter control 
switch

M54

4

12 V

Multifunction 
switch

M72

4

Climate controlled 
seat switch
(driver side)

M177

7

Climate controlled 
seat switch
(passenger side)

M178

7

LDW switch

M29

5

Snow mode 
switch

M176

5

Door mirror 
remote control 
switch

M20

16

AFS OFF switch

M21

5

Headlamp aiming 
switch

M15

3

Mode select 
switch

M179

4

Clock

M74

2

Combination 
switch

M36

23

IBA OFF switch

M184

5

DCA switch

M18

3

VDC OFF switch

M19

3

HOSPITALITY ILLUMINATION CIRCUIT

INL-57

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

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J

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M

A

B

INL

N

O

P

Does continuity exist?

YES

>> Replace each illumination.

NO

>> Repair the harnesses or connectors.

5.

CHECK ILLUMINATION CONTROL CIRCUIT FOR SHORT

1.

Turn ignition switch OFF.

2.

Disconnect the total illumination control unit connector and each illumination connectors.

3.

Check continuity between the total illumination control unit harness connector and ground.

Does continuity exist?

YES

>> Repair the harnesses or connectors.

NO

>> Replace the total illumination control unit.

Total illumination control unit

Illuminations

Continuity

Connector

Terminal

Connector

Terminal

M129

17

Meter control 
switch

M54

5

Existed

Multifunction 
switch

M72

5

Climate controlled 
seat switch
(driver side)

M177

8

Climate controlled 
seat switch
(passenger side)

M178

8

LDW switch

M29

4

Snow mode switch

M176

6

Door mirror 
remote control 
switch

M20

15

AFS OFF switch

M21

6

Headlamp aiming 
switch

M15

4

Mode select switch

M179

2

Clock

M74

1

Combination 
switch

M36

26

IBA OFF switch

M184

4

DCA switch

M18

4

VDC OFF switch

M19

4

Total illumination control unit

Ground

Continuity

Connector

Terminal

M129

17

Not existed

INL-58

< DTC/CIRCUIT DIAGNOSIS >

STEP LAMP CIRCUIT

STEP LAMP CIRCUIT

Description

INFOID:0000000005245598

Controls the step lamp (ground side) to turn the step lamp ON and OFF.

Component Function Check

INFOID:0000000005245599

CAUTION:

Check step lamp bulbs first.

1.

CHECK STEP LAMP OPERATION

CONSULT-III ACTIVE TEST

1.

Turn ignition switch ON.

2.

Select “STEP LAMP TEST” of BCM (INT LAMP) active test item.

3.

While operating the test items, check the step lamp operation.

Are the step lamps turned ON/OFF?

YES

>> Step lamp circuit is normal.

NO

>> Refer to 

INL-58, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005245600

1.

CHECK STEP LAMP OUTPUT

CONSULT-III ACTIVE TEST

1.

Turn ignition switch ON.

2.

Select “STEP LAMP TEST” of BCM (INT LAMP) active test item.

3.

While operating the test item, check continuity between BCM harness connector and ground.

Is the measurement value normal?

Fixed at 12 V>>Replace BCM.
Fixed at 0 V>>GO TO 2.

2.

CHECK THE SYMPTOM

Check that the lamp fixed to ON or OFF.

Fixed OFF>>GO TO 3.
Fixed ON>>GO TO 5.

3.

CHECK STEP LAMP POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect the step lamp connector.

3.

Turn ignition switch ON.

4.

Check voltage between the step lamp harness connector and ground.

Test item

Operation

STEP LAMP TEST

On

Step lamps

ON

Off

OFF

BCM

Ground

Test item

Continuity

Connector

Terminal

STEP LAMP 

TEST

M119

7

On

0 V

Off

12 V

STEP LAMP CIRCUIT

INL-59

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

K

M

A

B

INL

N

O

P

Is the measurement value normal?

YES

>> GO TO 4.

NO

>> Check the interior room lamp power supply. Refer to 

INL-28, "Diagnosis Procedure"

.

4.

CHECK STEP LAMP OPEN CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect BCM connector.

3.

Check continuity between BCM harness connector and step lamp harness connector.

Does continuity exist?

YES

>> Replace the step lamp.

NO

>> Repair the harnesses or connectors.

5.

CHECK STEP LAMP SHORT CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect BCM and step lamp connectors.

3.

Check continuity between BCM harness connector and ground.

Does continuity exist?

YES

>> Repair the harnesses or connectors.

NO

>> Replace BCM.

Step lamp

Ground

Voltage

(Approx.)

Connector

Terminal

Driver side

D12

1

12 V

Passenger 
side

D42

1

Rear LH

D59

1

Rear RH

D79

1

BCM

Step lamp

Continuity

Connec-

tor

Terminal

Connector

Terminal

M119

7

Driver side

D12

2

Existed

Passenger 
side

D42

2

Rear LH

D59

2

Rear RH

D79

2

BCM

Ground

Continuity

Connector

Terminal

M119

7

Not existed