Infiniti FX35, FX50 (S51). Manual — part 279

INTELLIGENT BRAKE ASSIST

BRC-147

< SYSTEM DESCRIPTION >

[INTELLIGENT BRAKE ASSIST]

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Component Description

INFOID:0000000005530058

×

: Applicable

*1: Vehicle-to-vehicle distance control mode

*2: Conventional (fixed speed) cruise control mode

*3: IBA system and Brake Assist (With Preview Function)

NOTE:

Only IBA system uses

A.

Combination meter

B.

Behind the glove box

C.

Front bumper (LH)

D.

Engine room (LH)

E.

Inside brake master cylinder cover

F.

Upper side of brake pedal

G.

Instrument driver lower panel (LH)

H.

Luggage room (RH)

Component

Function Description

Description

*1

*2

*3

ICC sensor integrated unit

×

×

×

Refer to

CCS-53, "Description"

.

ECM

×

×

×

Refer to

CCS-88, "Description"

.

ABS actuator and electric unit (control
unit)

×

×

×

Refer to

CCS-59, "Description"

.

BCM

×

Transmits the front wiper request signal to ICC sensor inte-
grated unit via CAN communication.

TCM

×

×

Refer to

CCS-129, "Description"

.

Unified meter and A/C amp.

×

×

×

Receives the meter display signal, ICC warning lamp signal,
and IBA OFF indicator lamp signal from ICC sensor integrat-
ed unit via CAN communication and transmits them to the
combination meter via the communication line.

Combination meter

×

×

×

Performs the following operations using the signals received
from the unified meter and A/C amp. via the communication
line.
• Displays the ICC system operation status using the meter

display signal.

• Illuminates the ICC system warning lamp using the ICC

warning lamp signal.

• Illuminates the IBA OFF indicator lamp using the IBA OFF

indicator lamp signal.

ICC brake switch

×

×

×

Refer to

CCS-61, "Description"

.

Stop lamp switch

×

×

×

ICC brake hold relay

×

×

Refer to

CCS-81, "Description"

.

Brake booster control unit

×

×

×

Refer to

CCS-99, "Description"

.

Brake booster

×

×

Refer to

CCS-99, "Description"

.

Brake pressure sensor

×

×

Refer to

CCS-69, "Description"

.

Booster solenoid/Release switch

×

×

• Refer to

CCS-71, "Description"

for booster solenoid.

• Refer to

CCS-74, "Description"

for release switch.

ICC warning chime

×

×

×

Refer to

CCS-142, "Description"

.

Steering angle sensor

×

Refer to

CCS-123, "Description"

.

IBA OFF switch

×

NOTE

Refer to

CCS-118, "Description"

.

BRC-148

< DTC/CIRCUIT DIAGNOSIS >

[INTELLIGENT BRAKE ASSIST]

INTELLIGENT BRAKE ASSIST

DTC/CIRCUIT DIAGNOSIS

INTELLIGENT BRAKE ASSIST

Diagnosis Procedure

INFOID:0000000005234680

1.

INTELLIGENT BRAKE ASSIST DIAGNOSIS

• The system will be cancelled automatically with a beep sound and IBA OFF indicator lamp on the combina-

tion meter will illuminate, when the system will not operate properly.

• When the IBA OFF indicator lamp continues to illuminate even if the IBA system is turned on after the engine

restarts, perform the trouble-diagnosis.

NOTE:
IBA system automatically returns to ON, when erasing self-diagnosis result of “ICC” with CONSULT-III.

>> Go to ICC (Full Speed Range). Refer to

CCS-11, "Work Flow"

.

SWITCH DOES NOT TURN ON / SWITCH DOES NOT TURN OFF

BRC-149

< SYMPTOM DIAGNOSIS >

[INTELLIGENT BRAKE ASSIST]

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SYMPTOM DIAGNOSIS

SWITCH DOES NOT TURN ON / SWITCH DOES NOT TURN OFF

Symptom Table

INFOID:0000000005234681

CAUTION:

Perform the self-diagnosis with CONSULT-III before the symptom diagnosis. Perform the trouble diag-
nosis if any DTC is detected.

Description

INFOID:0000000005234682

IBA system does not turn on/off.
• IBA OFF indicator lamp does not illuminate even if the IBA OFF switch is depressed when IBA OFF indicator

lamp is not illuminated.

• IBA OFF indicator lamp does not turn off even if the IBA OFF switch is depressed when IBA OFF indicator

lamp is illuminated.

NOTE:
• To turn the system off

⇔

on, push and hold the IBA OFF switch after starting the engine for more than 1 sec-

ond.

• The system on/off condition will be memorized even if the ignition switch turns OFF.

Diagnosis Procedure

INFOID:0000000005234683

1.

PERFORM THE SELF-DIAGNOSIS

1.

Perform “All DTC Reading” with CONSULT-III.

2.

Check if the DTC is detected in self-diagnosis results for “ICC” with CONSULT-III. Refer to

CCS-162,

"DTC Index"

.

Is any DTC detected?

YES

>> GO TO 6.

NO

>> GO TO 2.

2.

IBA OFF SWITCH INSPECTION

1.

Start the engine.

2.

Check that “IBA SW” operates normally in “DATA MONITOR” for “ICC” with CONSULT-III.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 5.

3.

CHECK IBA OFF INDICATOR CIRCUIT

1.

Start the engine.

2.

Select the active test item “METER LAMP” for “ICC” with CONSULT-III.

3.

Check if the IBA OFF indicator lamp illuminates when the test item is operated.

Is the inspection result normal?

YES

>> Refer to

GI-32, "Work Flow"

.

NO

>> GO TO 4.

4.

CHECK DATA MONITOR OF “UNIFIED METER AND A/C AMP.”

Check that “BA W/L” operates normally in “DATA MONITOR” for “METER/M&A” with CONSULT-III, when the
IBA OFF switch is pushed and hold for more than 1 second.

Is the inspection result normal?

YES

>> Replace the combination meter. Refer to

MWI-146, "Exploded View"

.

NO

>> Replace the unified meter and A/C amp. Refer to

MWI-147, "Exploded View"

.

Symptom

Inspection item/Reference page

IBA system does not turn on/off

IBA OFF indicator lamp is not turned
on

⇔

off when operating IBA OFF switch

BRC-149, "Diagnosis Procedure"

BRC-150

< SYMPTOM DIAGNOSIS >

[INTELLIGENT BRAKE ASSIST]

SWITCH DOES NOT TURN ON / SWITCH DOES NOT TURN OFF

5.

CHECK IBA OFF SWITCH

Check IBA OFF switch. Refer to

CCS-119, "Component Inspection (IBA OFF Switch)"

.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> GO TO 6.

6.

REPAIR OR REPLACE MALFUNCTIONING PARTS

Repair or replace malfunctioning parts.

>> GO TO 7.

7.

CHECK IBA SYSTEM

Check that IBA OFF indicator lamp turned on

⇔

off, when operating IBA OFF switch.

>> INSPECTION END