Infiniti M45 (Y34). Manual - part 644

 

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Infiniti M45 (Y34). Manual - part 644

 

 

FRONT FOG LAMP

LT-83

C

D

E

F

G

H

I

J

L

M

A

B

LT

TKWA0544E

LT-84

FRONT FOG LAMP

Terminals and Reference Value for Headlamp Battery Saver Control Unit

AKS004SY

Terminals and Reference Value for BCM

AKS004SZ

Terminal 

No.

Wire 

color

Item

Operation or condition

Reference value

1

W/B

Ignition switch ON or 
START

Ignition switch

OFF or ACC

Approx. 0V

ON or START

Battery voltage

2

W/PU

Headlamp relay out 1

Ignition switch
(with lighting switch 
except OFF or 1ST)

OFF 

or 

ACC

More than 45 seconds after igni-
tion switch is turned OFF or ACC

Battery voltage

Within 45 seconds after ignition 
switch is turned OFF or ACC

Approx. 0V

ON or START

Approx. 0V

Headlamps illuminate by auto light control.

Approx. 0V

3

R/B

Headlamp switch 1

Lighting switch

1ST

Approx. 2.4V

PASS or 2ND

Approx. 0V

Headlamps illuminate by auto light control.

Approx. 0V

4

B

Ground

Approx. 0V

7

Y/G

Battery power supply

Battery voltage

8

W/PU

Headlamp relay out 2

Ignition switch
(with lighting switch 
except OFF or 1ST)

OFF 

or 

ACC

More than 45 seconds after igni-
tion switch is turned OFF or ACC

Battery voltage

With 45 seconds after ignition 
switch is turned OFF or ACC

Approx. 0V

ON or START

Approx. 0V

Headlamps illuminate by auto light control.

Approx. 0V

9

R/B

Headlamp switch 2

Lighting switch

1ST

Approx. 2.4V

PASS or 2ND

Approx. 0V

Headlamps illuminate by auto light control.

Approx. 0V

10

Y/R

RAP input signal 

Ignition switch

OFF or ACC (After more than 45 seconds 
with ignition switch turned OFF or ACC)

Battery voltage

ON or START

Approx. 0V

11

B

Ground

Approx. 0V

Terminal 

No.

Wire 

color

Item

Measuring condition

Reference value

Ignition 

switch

Operation or condition

5

W/PU

Headlamp relay control signal

ON

Lighting switch: 
AUTO

Light is applied to optical 
sensor.

Battery voltage

Light is not applied to opti-
cal sensor.

Approx. 0V

14

Y/L

Lighting switch AUTO signal

ON

Lighting switch

AUTO

Approx. 0V

OFF

8V or more

37

LG

Front door switch (Passenger 
side) signal

OFF

Front door switch 
(Passenger side)

ON (open)

Approx. 0V

OFF (close)

Battery voltage

135

Y/G

RAP output signal

OFF

When headlamp battery saver timer is operated

Approx. 0V

142

R/Y

Front door switch (Driver side) 
signal

OFF

Front door switch 
(Driver side) signal

ON (open)

Approx. 0V

OFF (close)

Battery voltage

FRONT FOG LAMP

LT-85

C

D

E

F

G

H

I

J

L

M

A

B

LT

Front Fog Lamps Do Not Illuminate (Both Sides)

AKS003RT

1. 

CHECK FRONT FOG LAMP POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Remove front fog lamp relay.

3.

Check voltage between front fog lamp relay harness connector
E217 terminal 3 (OR) and ground.

OK or NG

OK

>> GO TO 2.

NG

>> Check the following.

15A fuse (No.76 located in fuse, fusible link and relay
block) 

Harness for open or short between front fog lamp relay and fuse

2. 

CHECK FRONT FOG LAMP RELAY

Apply 12V between front fog lamp relay terminals 1 and 2, and check
continuity between terminals 3 and 5.

OK or NG

OK

>> GO TO 3.

NG

>> Replace front fog lamp relay.

3. 

CHECK FRONT FOG LAMP RELAY POWER SUPPLY CIRCUIT

1.

Turn ignition switch ON.

2.

Check voltage between front fog lamp relay harness connector
E217 terminal 1 (L) and ground.

OK or NG

OK

>> GO TO 4.

NG

>> Check harness for open or short between front fog lamp

relay and headlamp relay-1.

3 (OR) - Ground

: Battery voltage should exist.

PKIA5914E

3 - 5

: Continuity should exist.

PKIA5915E

1 (L) - Ground

: Lighting switch 
2ND

: Battery voltage 
should exist.

PKIA5916E

LT-86

FRONT FOG LAMP

4. 

CHECK FRONT FOG LAMP SWITCH CIRCUIT

1.

Turn ignition switch OFF.

2.

Check continuity between front fog lamp relay harness connec-
tor E217 terminal 2 (SB) and ground while operating front fog
lamp switch with lighting switch “LOW” position.

OK or NG

OK

>> Check harness for open or short between front fog lamp

relay and front fog lamps.

NG

>> GO TO 5.

5. 

CHECK FRONT FOG LAMP SWITCH

1.

Disconnect front fog lamp switch.

2.

Check continuity between front fog lamp switch terminals 31 and
32 while operating front fog lamp switch.

OK or NG

OK

>> GO TO 6.

NG

>> Replace the front fog lamp switch.

6. 

CHECK LIGHTING SWITCH CIRCUIT

1.

Disconnect lighting switch.

2.

Check continuity between front fog lamp switch harness connec-
tor M63 terminal 32 (R/W) and lighting switch harness connector
M55 terminal 10 (R/W).

3.

Check continuity between front fog lamp switch harness connec-
tor M63 terminal 32 (R/W) and ground.

OK or NG

OK

>> Check lighting switch. Refer to 

LT-102, "Switch Circuit Inspection"

 .

NG

>> Repair harness or connector.

Front Fog Lamp Does Not Illuminate (One Side)

AKS003RU

1. 

BULB INSPECTION

1.

Replace bulb with other side bulb or new one.

2.

Check if front fog lamp illuminates correctly.

OK or NG

OK

>> Replace front fog lamp bulb.

NG

>> GO TO 2.

Terminals

Fog lamp 

switch condition

Continuity

Connector

Terminal (Wire color)

B217

2 (SB)

Ground

ON

Yes

OFF

No

PKIA5917E

Terminals

Fog lamp switch condition

Continuity

31

32

ON

Yes

OFF

No

PKIA7886E

32 (R/W) - 10 (R/W)

: Continuity should exist.

32 (R/W) - Ground

: Continuity should not exist.

PKIA5919E

 

 

 

 

 

 

 

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