Infiniti G35 (V35). Manual - part 438

ASCD BRAKE SWITCH

EC-633

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D

E

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EC

ASCD BRAKE SWITCH

PFP:25320

Component Description

NBS00126

When the brake pedal is depressed, ASCD brake switch is turned
OFF and stop lamp switch is turned ON. ECM detects the state of
the brake pedal by this input of two kinds (ON/OFF signal).
Refer to 

EC-29, "AUTOMATIC SPEED CONTROL DEVICE (ASCD)"

for the ASCD function.

CONSULT-II Reference Value in Data Monitor Mode

NBS00127

Specification data are reference values.

PBIB1005E

MONITOR ITEM

CONDITION

SPECIFICATION

BRAKE SW 1
(ASCD brake switch)

●

Ignition switch: ON

●

Brake pedal: Fully released (A/T)

●

Brake pedal and clutch pedal: Fully 
released (M/T)

ON

●

Brake pedal: Slightly depressed (A/T)

●

Brake pedal and/or clutch pedal: 
Slightly depressed (M/T)

OFF

BRAKE SW 2
(Stop lamp switch)

●

Ignition switch: ON

Brake pedal: Fully released

OFF

Brake pedal: Slightly depressed

ON

EC-634

ASCD BRAKE SWITCH

Wiring Diagram

NBS00128

TBWM0831E

ASCD BRAKE SWITCH

EC-635

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A

EC

Specification data are reference values and are measured between each terminal and ground.

CAUTION:

Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

101

P/L

Stop lamp switch

[Ignition switch: OFF]

●

Brake pedal: Fully released

Approximately 0V

[Ignition switch: OFF]

●

Brake pedal: Slightly depressed

BATTERY VOLTAGE
(11 - 14V)

108

SB

ASCD brake switch

[Ignition switch: ON]

●

Brake pedal: Slightly depressed (A/T)

●

Brake pedal and/or clutch pedal: Slightly 
depressed (M/T)

Approximately 0V

[Ignition switch: ON]

●

Brake pedal: Fully released (A/T)

●

Brake pedal and clutch pedal: Fully released 
(M/T)

BATTERY VOLTAGE
(11 - 14V)

EC-636

ASCD BRAKE SWITCH

Diagnostic Procedure

NBS00129

A/T MODELS

1. 

CHECK OVERALL FUNCTION-I

 With CONSULT-II

1.

Turn ignition switch ON.

2.

Select “BRAKE SW1” in “DATA MONITOR” mode with CONSULT-II.

3.

Check “BRAKE SW1” indication under the following conditions.

 Without CONSULT-II

1.

Turn ignition switch ON.

2.

Check voltage between ECM terminal 108 and ground under the
following conditions.

OK or NG

OK

>> GO TO 2.

NG

>> GO TO 3.

CONDITION

INDICATION

Brake pedal: Slightly depressed

OFF

Brake pedal: Fully released

ON

SEC011D

CONDITION

VOLTAGE

Brake pedal: Slightly depressed

Approximately 0V

Brake pedal: Fully released

Battery voltage

MBIB0061E