Nissan Frontier D40. Manual - part 635

AUTO LIGHT SYSTEM

EXL-13

< FUNCTION DIAGNOSIS >

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Component Parts Location

INFOID:0000000005274710

Component Description

INFOID:0000000005274711

1.

IPDM E/R E122, E123, E124

2.

BCM M18, M19,  M20 (view with lower 
instrument panel LH removed)

3.

Front door switch
LH B8
RH B108

4.

Rear door switch
LH B18
RH B116

5.

Optical sensor M14

6.

Combination switch (lighting and turn 
signal switch) M28

AWLIA1689ZZ

Part name

Description

BCM

BCM (Body Control Module) controls auto light operation accord-
ing to signals from optical sensor, lighting switch and ignition 
switch.

IPDM E/R

IPDM E/R (Intelligent Power Distribution Module Engine Room) 
operates parking, license plate, tail and headlamps according to 
CAN communication signals from BCM.

Combination switch (lighting and turn signal switch)

The lighting switch outputs lighting requests to the BCM.

Optical sensor

Optical sensor detects ambient brightness and converts light 
(lux) to voltage, then sends the optical sensor signal to BCM.

Door switches

Detects door open/closed status and forwards that  status to the 
BCM.

EXL-14

< FUNCTION DIAGNOSIS >

FRONT FOG LAMP

FRONT FOG LAMP

System Diagram

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System Description

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The front fog lamps are activated with the combination switch (lighting and turn signal switch). The combina-
tion switch (lighting and turn signal switch) signal to the BCM is monitored with the BCM combination switch
reading function. When the fog lamps are turned ON with the combination switch (lighting and turn signal
switch), the BCM sends a front fog lamp request signal via CAN communication lines to the IPDM E/R. The
IPDM E/R grounds the front fog lamp relay coil to activate the front fog lamps.

FRONT FOG LAMP OPERATION

When the combination switch (lighting and turn signal switch) is in front fog lamp ON position and also in 1ST
or 2ND position or AUTO (if equipped) position (headlamp is ON), the BCM detects FR FOG ON and the
HEAD LAMP1 or 2 ON. The BCM sends a front fog lamp request ON signal via the CAN communication lines
to the IPDM E/R. The IPDM E/R then turns ON the front fog lamp relay sending power to the front fog lamps.

Component Parts Location

INFOID:0000000005274714

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1.

IPDM E/R E122, E123, E124

2.

BCM M18, M20 (view with lower instru-
ment panel LH removed)

3.

Combination switch (lighting and turn 
signal switch) M28

AWLIA0732ZZ

FRONT FOG LAMP

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Component Description

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Part name

Description

BCM

• Receives lighting switch requests via BCM combination switch 

reading function.

• Sends headlamp high/low request signal to the IPDM E/R.

IPDM E/R

Activates the front fog lamp relay upon request from the BCM.

Combination switch (lighting and turn signal switch)

Outputs lighting requests to the BCM.

EXL-16

< FUNCTION DIAGNOSIS >

TURN SIGNAL AND HAZARD WARNING LAMPS

TURN SIGNAL AND HAZARD WARNING LAMPS

System Diagram

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System Description

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TURN SIGNAL OPERATION

When the combination switch (lighting and turn signal switch) is in LH or RH position with the ignition switch in
ON position, the BCM detects the TURN RH or TURN LH ON request. The BCM outputs the flasher signal to
the respective turn signal lamp. The BCM also sends a turn indicator signal ON request via the CAN commu-
nication lines to the combination meter. The combination meter then activates the appropriate turn signal indi-
cator and audible buzzer.

HAZARD LAMP OPERATION

When the hazard switch is in ON position, the BCM detects the hazard switch signal ON. The BCM outputs the
flasher signal (right and left). The BCM sends a hazard indicator signal ON request via the CAN communica-
tion lines to the combination meter. The combination meter then activates the hazard indicator and audible
buzzer.

Component Parts Location

INFOID:0000000005274718

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1.

BCM  M18, M20 (view with lower in-
strument panel LH removed)

2.

Combination switch (lighting and turn 
signal switch) M28

3.

Combination meter M24

4.

Hazard switch M55

AWLIA1683ZZ