Nissan Altima L32. Manual - part 684

EXL-20

< FUNCTION DIAGNOSIS >

PARKING, LICENSE PLATE AND TAIL LAMPS

PARKING, LICENSE PLATE AND TAIL LAMPS

System Diagram

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System Description

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• BCM (Body Control Module) controls parking, license plate and tail lamps operation.

• IPDM E/R (Intelligent Power Distribution Module Engine Room) operates parking, license plate and tail

lamps according to CAN communication signals from BCM.

Component Parts Location

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AWLIA0013GB

1.

IPDM E/R E17, E18, E201

2.

BCM M16, M17, M18, M19 (view with 
instrument panel removed)

3.

Combination switch M28

ALLIA0019ZZ

PARKING, LICENSE PLATE AND TAIL LAMPS

EXL-21

< FUNCTION DIAGNOSIS >

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Component Description

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PARKING, LICENSE PLATE AND TAIL LAMPS OPERATION

When the lighting switch is in 1ST position, BCM detects the LIGHTING SWITCH 1ST POSITION ON. The

BCM sends a parking light ON request through the CAN communication lines to the IPDM E/R. The IPDM E/R

then activates the tail lamp relay which sends power to the parking and instrument illumination circuits. 

EXTERIOR LAMP BATTERY SAVER CONTROL

With the lighting switch (combination switch) in the 2nd position and the ignition switch is turned from ON or

ACC to OFF, the battery saver feature is activated.

Under this condition, the headlamps remain illuminated for 5 minutes unless the lighting switch position is

changed. If the lighting switch position is changed, then the headlamps are turned off. 

This setting can be changed by CONSULT-III. Refer to 

EXL-30, "BATTERY SAVER : CONSULT-III Function"

.

EXL-22

< FUNCTION DIAGNOSIS >

COMBINATION SWITCH READING SYSTEM

COMBINATION SWITCH READING SYSTEM

System Diagram

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System Description

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OUTLINE

• BCM reads the status of the combination switch (light, turn signal, wiper and washer) and recognizes the

status of each switch.

• BCM is a combination of 5 output terminals (OUTPUT 1 - 5) and 5 input terminals (INPUT 1 - 5). It reads a

maximum of 20 switch status.

COMBINATION SWITCH MATRIX

Combination switch circuit

Combination switch INPUT-OUTPUT system list

JPMIA0083GB

System

OUTPUT 1

OUTPUT 2

OUTPUT 3

OUTPUT 4

OUTPUT 5

INPUT 1

—

FR WASHER

FR WIPER LOW

TURN LH

TURN RH

INPUT 2

FR WIPER HI

—

FR WIPER INT

PASSING

HEADLAMP 1

INPUT 3

INT VOLUME 1

—

—

HEADLAMP 2

HI BEAM

JPMIA0066GB

COMBINATION SWITCH READING SYSTEM

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NOTE:
Headlamp has a dual system switch.

COMBINATION SWITCH READING FUNCTION

Description

• BCM reads the status of the combination switch at 10ms interval normally.

NOTE:

BCM reads the status of the combination switch at 60ms interval when BCM is controlled at low power con-

sumption mode.

• BCM operates as follows and judges the status of the combination switch.

- INPUT 1 - 5 outputs the voltage waveforms of 5 systems simultaneously.

- It operates the transistor on OUTPUT side in the following order: OUTPUT 5 

→ 4 →3 →2 →1.

- The voltage waveform of INPUT corresponding to the formed circuit changes according to the operation of

the transistor on OUTPUT side if any (1 or more) switches are ON.

- It reads this change of the voltage as the status signal of the combination switch.

Operation Example

In the following operation example, the combination of the status signals of the combination switch is replaced

as follows: INPUT 1 - 5 to “1 - 5” and OUTPUT 1 - 5 to “A - E”.

Example 1: When a switch (TURN RH switch) is turned ON

INPUT 4

—

INT VOLUME 3

AUTO LIGHT

—

TAIL LAMP

INPUT 5

INT VOLUME 2

—

—

FR FOG

—

System

OUTPUT 1

OUTPUT 2

OUTPUT 3

OUTPUT 4

OUTPUT 5

JPMIA0067GB

JPMIA0068GB