Infiniti QX56 (Z62). Manual — part 162

NORMAL OPERATING CONDITION

BRC-133

< SYMPTOM DIAGNOSIS >

[WITH VDC]

BRC

NORMAL OPERATING CONDITION

Description

INFOID:0000000006222669

Symptom

Result

Brake pedal slightly vibrates and operation sound (motor sound and sound from suspen-
sion) occurs when VDC function, TCS function, ABS function, EBD function, hill start assist
function and brake limited slip differential (BLSD) function operates.

This is not a malfunction, The symptom
occurs VDC function, TCS function, ABS
function, EBD function, hill start assist
function and brake limited slip differential
(BLSD) function that are normally operat-
ed.

Brake stopping distance may become longer than models without ABS function depending
on the road conditions, when ABS function is operated on slippery road like rough road,
gravel road or snowy road.

Brake pedal vibrates and operation sound occurs during sudden acceleration and corner-
ing, when VDC function, TCS function, hill start assist function and brake limited slip differ-
ential (BLSD) function is operated.

Brake pedal vibrates and motor sound from the engine room occurs, when the engine starts
or the vehicle starts just after starting the engine

This is not a malfunction. The symptom
occurs during the brake fluid accumula-
tion in the accumulator and operational
check of the ABS actuator and electric
unit (control unit).

Acceleration may be felt insufficient depending on the road conditions.

This is not a malfunction. The symptom
occurs TCS function that puts the highest
priority to obtain the optimum traction
(stability).

TCS may operate momentarily, while driving on a road where friction coefficient varies, or
when downshifting or fully depressing accelerator pedal

ABS warning lamp and VDC warning lamp may turn ON, when the vehicle is on a rotating
turntable or is given a strong shaking or large vibrations on a ship while the engine is run-
ning.

In this case, restart the engine on a nor-
mal road. If the normal condition is re-
stored, there is no malfunction. In that
case, erase self-diagnosis result memory
for “ABS” with CONSULT-III.

VDC warning lamp may turn ON and VDC function, TCS function, hill start assist function
and brake limited slip differential (BLSD) function may not normally operate, when driving
on a special road the is extremely slanted (bank in a circuit course).

A malfunction in yaw rate/side/decel G sensor system may be detected when the vehicle
sharply turns during a spin turn, acceleration turn or drift driving while VDC function and
TCS function are OFF (VDC OFF switch is pressed and VDC OFF indicator lamp is in ON
status).

The vehicle speed does not increase, when the accelerator pedal is depressed while the
vehicle is on a 2-wheel chassis dynamometer for speedometer check.

This is not malfunction. (When checking
the vehicle on a chassis dynamometer,
operate VDC OFF switch so that TCS
function is OFF.)

The VDC warning lamp, ABS warning lamp and brake warning lamp turn ON and DTC
“C118E” may be detected in self-diagnosis result of “ABS” when the brake pedal is exces-
sively operated, such as air bleeding.

This is not a system malfunction because
this occurs due to the temporary de-
crease in accumulator fluid pressure. The
system returns to normal condition when
the accumulator fluid pressure reaches
the specified pressure with the ignition
switch ON and the VDC warning lamp,
ABS warning lamp, and brake warning
lamp turn OFF. After these steps, ABS
self-diagnosis results are erased.

VDC OFF indicator lamp turns ON and TCS function is not operate when 4WD mode is “4L”.
(Models with 4WD system)

This is not a malfunction. When the 4WD
mode becomes “4L” state, the TCS func-
tion is disabled. This function is enabled
when the 4WD mode becomes “AUTO”
or “4H”.

BRC-134

< REMOVAL AND INSTALLATION >

[WITH VDC]

WHEEL SENSOR

REMOVAL AND INSTALLATION

WHEEL SENSOR

FRONT WHEEL SENSOR

FRONT WHEEL SENSOR : Exploded View

INFOID:0000000006222670

CAUTION:

Replace wheel hub and bearing assembly as an assembly when replacing because wheel sensor can-
not be disassembled.

NOTE:
Front RH wheel sensor is symmetrically opposite of LH.

FRONT WHEEL SENSOR : Removal and Installation

INFOID:0000000006222671

CAUTION:

Replace wheel hub and bearing assembly as an assembly when replacing because wheel sensor can-
not be disassembled.

REMOVAL

Remove wheel hub and bearing assembly. Refer to

FAX-8, "Removal and Installation"

(2WD),

FAX-18,

"Removal and Installation"

(4WD).

CAUTION:

Never twist or pull front wheel sensor harness.

INSTALLATION

Note the following, and install in the reverse order of the removal.

Front LH wheel sensor harness con-
nector

Front LH wheel sensor

Bracket

: Vehicle front

Refer to

GI-4, "Components"

for symbols in the figure.

JPFIC0199GB

WHEEL SENSOR

BRC-135

< REMOVAL AND INSTALLATION >

[WITH VDC]

BRC

• Never twist front wheel sensor harness when installing front wheel sensor. Check that grommet is fully

inserted to bracket. Check that front wheel sensor harness is not twisted after installation.

• Check that front wheel sensor identification line face toward the vehicle rear.

REAR WHEEL SENSOR

REAR WHEEL SENSOR : Exploded View

INFOID:0000000006222672

CAUTION:

Replace wheel hub and bearing assembly as an assembly when replacing because wheel sensor can-
not be disassembled.

NOTE:
Rear RH wheel sensor is symmetrically opposite of LH.

REAR WHEEL SENSOR : Removal and Installation

INFOID:0000000006222673

CAUTION:

Replace wheel hub and bearing assembly as an assembly when replacing because wheel sensor can-
not be disassembled.

REMOVAL

Remove wheel hub and bearing assembly. Refer to

RAX-7, "Removal and Installation"

CAUTION:

Never twist or pull rear wheel sensor harness.

INSTALLATION

Note the following, and install in the reverse order of the removal.
Never twist rear wheel sensor harness when installing rear wheel sensor. Check that grommet is fully inserted
to bracket. Check that rear wheel sensor harness is not twisted after installation.

Rear LH wheel sensor harness con-
nector

Rear LH wheel sensor

Bracket

: Vehicle front

Refer to

GI-4, "Components"

for symbols in the figure.

JPFIC0200GB