Nissan Maxima. Manual - part 611

EXL-186

< SYSTEM DESCRIPTION >

[HALOGEN TYPE]

COMBINATION SWITCH READING SYSTEM

COMBINATION SWITCH READING SYSTEM

System Diagram

INFOID:0000000010069909

System Description

INFOID:0000000010069910

OUTLINE

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

status of each switch.

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

a maximum of 20 switch states.

COMBINATION SWITCH MATRIX

Combination switch circuit

Combination switch INPUT-OUTPUT system list

AWMIA1215GB

System

INPUT 1

INPUT 2

INPUT 3

INPUT 4

INPUT 5

OUTPUT 1

—

FR WASHER

FR WIPER LOW

TURN LH

TURN RH

OUTPUT 2

FR WIPER HI

—

FR WIPER INT

PASSING

HEADLAMP 1

OUTPUT 3

INT VOLUME 1

—

—

HEADLAMP 2

HI BEAM

AWMIA1216GB

COMBINATION SWITCH READING SYSTEM

EXL-187

< SYSTEM DESCRIPTION >

[HALOGEN TYPE]

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EXL

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COMBINATION SWITCH READING FUNCTION

Description

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

NOTE:

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

sumption mode.

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

- It operates the transistor on OUTPUT side in the following order: OUTPUT 1 

→ 2 →3 →4 →5 and outputs

voltage waveform.

- The voltage waveform of OUTPUT corresponding to the formed circuit is input into the interface on INPUT

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

OUTPUT 4

—

INT VOLUME 3

AUTO LIGHT

—

TAIL LAMP

OUTPUT 5

INT VOLUME 2

—

—

FR FOG

—

System

INPUT 1

INPUT 2

INPUT 3

INPUT 4

INPUT 5

JPMIA0609GB

JMMIA0326GB

EXL-188

< SYSTEM DESCRIPTION >

[HALOGEN TYPE]

COMBINATION SWITCH READING SYSTEM

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 (TAIL LAMP) is turned ON

• The circuit between OUTPUT 4 and INPUT 5 is formed when the TAIL LAMP is turned ON.

• BCM detects the combination switch status signal “5D” when the signal of OUTPUT 4 is input to INPUT 5.

• BCM judges that the TAIL LAMP switch is ON when the signal “5D” is detected.

Example 2: When some switches (TRUN RH, TAIL LAMP) are turned ON

• The circuits between OUTPUT 1 and INPUT 5 and between OUTPUT 4 and INPUT 5 are formed when the

TURN RH switch and TAIL LAMP switch are turned ON.

• BCM detects the combination switch status signal “5AD” when the signals of OUTPUT 1 and OUTPUT 4 are

input to INPUT 5.

• BCM judges that the TURN RH switch and TAIL LAMP switch are ON when the signal “5AD” is detected.

WIPER INTERMITTENT DIAL POSITION SETTING (FRONT WIPER INTERMITTENT OPERATION)

BCM judges the wiper intermittent dial 1 - 7 by the status of INT VOLUME 1, 2, and 3 switches.

AWMIA1217GB

AWMIA1218GB

COMBINATION SWITCH READING SYSTEM

EXL-189

< SYSTEM DESCRIPTION >

[HALOGEN TYPE]

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Wiper intermittent dial posi-

tion

Intermittent oper-

ation delay inter-

val

INT VOLUME switch ON/OFF status  

INT VOLUME 1 switch

INT VOLUME 2 switch

INT VOLUME 3 switch

1

Short

↑

↓

Long

ON

ON

ON

2

ON

ON

OFF

3

ON

OFF

OFF

4

OFF

OFF

OFF

5

OFF

OFF

ON

6

OFF

ON

ON

7

OFF

ON

OFF