Infiniti FX35, FX50 (S51). Manual - part 1022

EXL-84

< DTC/CIRCUIT DIAGNOSIS >

[XENON TYPE]

OPTICAL SENSOR

 With illuminating the optical sensor, check the voltage between the optical sensor harness connector and the
ground.

*: Illuminate the optical sensor. The value may be less than the standard if brightness is weak.

Is the measurement value normal?

YES

>> GO TO 7.

NO

>> Replace the optical sensor.

4.

CHECK OPTICAL SENSOR OPEN CIRCUIT

1.

Turn the ignition switch OFF.

2.

Disconnect the optical sensor connector and the BCM connector.

3.

Check continuity between the optical sensor harness connector and the BCM harness connector.

Does continuity exist?

YES

>> GO TO 5.

NO

>> Repair the harnesses or connectors.

5.

CHECK OPTICAL SENSOR SHORT CIRCUIT

Check the continuity between the optical sensor harness connector and the ground.

Does continuity exist?

YES

>> Repair the harnesses or connectors.

NO

>> Replace BCM.

6.

CHECK OPTICAL SENSOR GROUND OPEN CIRCUIT

1.

Turn the ignition switch OFF.

2.

Disconnect the optical sensor connector and BCM connector.

3.

Check continuity between the optical sensor harness connector and the BCM harness connector.

Does continuity exist?

YES

>> Replace BCM.

NO

>> Repair the harnesses or connectors.

7.

CHECK OPTICAL SENSOR SIGNAL OPEN CIRCUIT 

1.

Turn the ignition switch OFF.

2.

Disconnect the optical sensor connector and the BCM connector.

Terminals

Condition

Voltage

(Approx.)

(+)

(

−

)

Optical sensor

Ground

Optical sen-

sor

Connector

Terminal

M94

2

When illumi-
nating

3.1 V or 
more *

When shut-
ting off light

0.6 V or less

Optical sensor

BCM

Continuity

Connector

Terminal

Connector

Terminal

M94

1

M123

138

Existed

Optical sensor

Ground

Continuity

Connector

Terminal

M94

1

Not existed

Optical sensor

BCM

Continuity

Connector

Terminal

Connector

Terminal

M94

3

M123

137

Existed

OPTICAL SENSOR

EXL-85

< DTC/CIRCUIT DIAGNOSIS >

[XENON TYPE]

C

D

E

F

G

H

I

J

K

M

A

B

EXL

N

O

P

3.

Check continuity between the optical sensor harness connector and the BCM harness connector.

Does continuity exist?

YES

>> GO TO 8.

NO

>> Repair the harnesses or connectors.

8.

CHECK OPTICAL SENSOR SHORT CIRCUIT

Check the continuity between the optical sensor harness connector and the ground.

Does continuity exist?

YES

>> Repair the harnesses or connectors.

NO

>> Replace BCM.

Optical sensor

BCM

Continuity

Connector

Terminal

Connector

Terminal

M94

2

M123

113

Existed

Optical sensor

Ground

Continuity

Connector

Terminal

M94

2

Not existed

EXL-86

< DTC/CIRCUIT DIAGNOSIS >

[XENON TYPE]

HAZARD SWITCH

HAZARD SWITCH

Description

INFOID:0000000005244751

Hazard switch is integrated in the multifunction switch. Hazard switch inputs the signals to BCM when press-
ing the switch.

Component Function Check

INFOID:0000000005244752

1.

CHECK HAZARD SWITCH SIGNAL BY CONSULT-III

CONSULT-III DATA MONITOR

1.

Turn the ignition switch ON.

2.

Select "HAZARD SW" of BCM (FLASHER) data monitor item.

3.

With operating the hazard switch, check the monitor status.

Is the item status normal?

YES

>> Hazard switch circuit is normal.

NO

>> Refer to 

EXL-86, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005244753

1.

CHECK HAZARD SWITCH SIGNAL INPUT

With operating the hazard switch, check the voltage between the BCM harness connector and the ground.

Is the measurement value normal?

YES

>> Replace BCM.

NO

>> GO TO 2.

2.

CHECK HAZARD SWITCH SIGNAL OPEN CIRCUIT

1.

Turn the ignition switch OFF.

2.

Disconnect the multifunction switch connector and the BCM connector.

3.

Check continuity between the multifunction switch harness connector and the BCM harness connector.

Does continuity exist?

Monitor item

Condition

Monitor status

HAZARD SW

Hazard switch

While pressing the switch

On

While not pressing the switch

Off

Terminals

Condition

Voltage (Approx.)

(+)

(

−

)

BCM

Ground

Hazard switch

Connector

Terminal

M122

110

While pressing 
the switch

0 V

While not press-
ing the switch

JPMIA0012GB

Multifunction switch

BCM

Continuity

Connector

Terminal

Connector

Terminal

M72

16

M122

110

Existed

HAZARD SWITCH

EXL-87

< DTC/CIRCUIT DIAGNOSIS >

[XENON TYPE]

C

D

E

F

G

H

I

J

K

M

A

B

EXL

N

O

P

YES

>> GO TO 3.

NO

>> Repair the harnesses or connectors.

3.

CHECK HAZARD SWITCH SIGNAL SHORT CIRCUIT

Check continuity between the multifunction switch harness connector and the ground.

Does continuity exist?

YES

>> Repair the harnesses or connectors.

NO

>> GO TO 4.

4.

CHECK HAZARD SWITCH GROUND OPEN CIRCUIT

Check continuity between the multifunction switch harness connector and the ground.

Does continuity exist?

YES

>> Replace the hazard switch (multifunction switch).

NO

>> Repair the harnesses or connectors.

Multifunction switch

Ground

Continuity

Connector

Terminal

M72

16

Not existed

Multifunction switch

Ground

Continuity

Connector

Terminal

M72

1

Existed