Infiniti QX56 (Z62). Manual - part 167

SYSTEM

BRC-153

< SYSTEM DESCRIPTION >

[INTELLIGENT BRAKE ASSIST]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

Fail-safe Indication

NOTE:
When the IBA turns OFF, the IBA OFF indicator lamp will illuminate.

Condition

Description

Indication on the combination meter

When the 4WD shift switch is in the 4H or 
4L position

The system is temporary unavailable.
(Without the warning chime)

JSFIA0444ZZ

Condition

Description

Indication on the combination meter

• When the sensor window is dirty
• When the system malfunction

The system will be cancelled automatically 
with a beep sound.

When driving into a strong light
(i.e. sunlight)

The system is temporary unavailable.
(Without the warning chime)

JSFIA0392ZZ

BRC-154

< DTC/CIRCUIT DIAGNOSIS >

[INTELLIGENT BRAKE ASSIST]

INTELLIGENT BRAKE ASSIST

DTC/CIRCUIT DIAGNOSIS

INTELLIGENT BRAKE ASSIST

Diagnosis Procedure

INFOID:0000000006228300

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/ADAS” with CONSULT-III.

>> Go to ICC. Refer to 

CCS-69, "Work Flow"

.

SWITCH DOES NOT TURN ON / SWITCH DOES NOT TURN OFF

BRC-155

< SYMPTOM DIAGNOSIS >

[INTELLIGENT BRAKE ASSIST]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

SYMPTOM DIAGNOSIS

SWITCH DOES NOT TURN ON / SWITCH DOES NOT TURN OFF

Symptom Table

INFOID:0000000006228301

CAUTION:

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

Description

INFOID:0000000006228302

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

second.

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

Diagnosis Procedure

INFOID:0000000006228303

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/ADAS” with CONSULT-III. Refer to 

CCS-50,

"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/ADAS” 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/ADAS” 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 

CCS-69, "Work Flow"

.

NO

>> GO TO 4.

4.

CHECK DATA MONITOR OF COMBINATION METER

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-85, "Removal and Installation"

.

NO

>> Replace the ADAS control unit. Refer to 

DAS-63, "Removal and Installation"

.

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-155, "Diagnosis Procedure"

BRC-156

< 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-127, "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