Infiniti Q45. Manual - part 266

 

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Infiniti Q45. Manual - part 266

 

 

TROUBLE DIAGNOSIS

BRC-29

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

ABS SIGNAL (ON/OFF)

×

ABS operation (ON/OFF) status is dis-
played.

TCS SIGNAL (ON/OFF)

×

TCS operation (ON/OFF) status is dis-
played.

VDC SIGNAL (ON/OFF)

×

VDC operation (ON/OFF) status is dis-
played.

Data monitor item (Unit)

SELECT MONITOR ITEM

Remarks

ECU INPUT

SIGNALS

MAIN SIGNALS

SELECTION 

FROM MENU

BRC-30

[VDC/TCS/ABS]

TROUBLE DIAGNOSIS

ACTIVE TEST

CAUTION:

Do not perform active test while driving vehicle.

Make sure to completely bleed air from brake system.

Active test cannot be performed when ABS warning lamp, VDC OFF indicator lamp stet SLIP indi-
cator lamp stet on before starting ACTIVE TEST.

ABS warning lamp, VDC OFF indicator lamp and SLIP indicator lamp turn on during ACTIVE TEST.

Operation Procedure

1.

Perform “CONSULT-II Start Procedure”. Refer to 

GI-36, "CONSULT-II Start Procedure"

 .

2.

Touch “ACTIVE TEST”.

3.

The “SELECT TEST ITEM” is displayed.

4.

Touch necessary test item.

5.

While “MAIN SIGNALS” indication is inverted, touch “START”.

6.

“ACTIVE TEST” screen will be displayed so perform the follow-
ing test.

NOTE:

When active test is performed while depressing the pedal, the
pedal depression amount will change. This is normal.

“TEST IS STOPPED” is displayed 10 seconds after operation
start.

After “TEST IS STOPPED” is displayed, to perform test again,
touch “BACK” and repeat step 3.

SFIA0162E

TROUBLE DIAGNOSIS

BRC-31

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

Solenoid Valve

NOTE:
The example shown is for front right wheel. The procedure for the other wheels are the same as given below. 

When performing an active test of the ABS function, select the
“MAIN SIGNALS” for each test item. In addition, when perform-
ing an active test of the VDC/TCS function, select the item menu
for each test item.

For ABS solenoid valve, touch “UP”, “KEEP”, and “DOWN” on
the display screen. For ABS solenoid valve (ACT), touch “UP”,
“ACT UP”, “ACT KEEP” and confirm that solenoid valves (EV,
AV, USV, HSV) operate as shown in the table below.

Solenoid Valve Operation Chart

*: ON for 1 to 2 seconds after the touch, and then OFF

ABS Motor

Touch “ON” and “OFF” on the screen. Make sure that ABS motor
relay operates as shown in table below.

SLIP Indicator Lamp

Touch “ON” and “OFF” on the screen. Make sure that SLIP indicator
lamp operates as shown in table below.

SFIA0802E

Operation

ABS solenoid valve

ABS solenoid valve (ACT)

UP

KEEP

DOWN

UP

ACT UP

ACT KEEP

EV SIGNAL FR

OFF

ON

ON

OFF

OFF

OFF

AV SIGNAL FR 

OFF

OFF

ON*

OFF

OFF

OFF

USV SIGNAL S 

OFF

OFF

OFF

OFF

ON

ON

MAV SIGNAL S 

OFF

OFF

OFF

OFF

ON*

OFF

Operation

ON

OFF

M/R OUTPUT

ON

OFF

SFIA0804E

Operation

ON

OFF

SLIP LAMP

ON

OFF

SFIA0594E

BRC-32

[VDC/TCS/ABS]

TROUBLE DIAGNOSIS

ABS Warning Lamp

Touch “ON” and “OFF” on the screen. Make sure that ABS warning
lamp operates as shown in table below.

VDC OFF Indicator Lamp

Touch “ON” and “OFF” on the screen. Make sure that VDC  OFF
indicator lamp operates as shown in table below.

ASCD Output

Touch “ON” and “OFF” on the screen. Make sure that ASCD output
is as shown in table below.

VDC/TCS/ABS CONTROL UNIT PART NUMBER

Ignore the VDC/TCS/ABS control unit part number displayed in the “ECU PART NUMBER”.
Refer to parts catalog to order the VDC/TCS/ABS control unit.

Trouble Diagnosis Chart for Symptoms

NFS000I2

If ABS warning lamp, VDC OFF indicator lamp and SLIP indicator lamp turn ON, perform self-diagnosis. Refer to 

BRC-24, "SELF-DIAG

RESULT MODE"

 .

Operation

ON

OFF

ABS WARN LAMP

ON

OFF

SFIA0595E

Operation

ON

OFF

VDC OFF LAMP

ON

OFF

SFIA0803E

Operation

ON

OFF

ASCD SIGNAL

ON

OFF

SFIA2156E

Symptom

Check item

Reference Page

Excessive ABS Function Operation Frequency

Brake force distribution

BRC-58

Looseness of front and rear axle

Wheel sensor and rotor system

Unexpected pedal reaction

Brake pedal stroke

BRC-58

Make sure the braking force is sufficient when the ABS is not 
operating.

The braking distance is long

Check stopping distance when the ABS is not operating.

BRC-59

The ABS function does not operate

Wheel sensor

BRC-59

The ABS does not operate when the speed is 10 km/h (6MPH) or 
less.

 

 

 

 

 

 

 

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