Nissan Pathfinder (2008 year). Manual — part 101
BRC-114
< SYMPTOM DIAGNOSIS >
[VDC/TCS/ABS]
VEHICLE JERKS DURING VDC/TCS/ABS CONTROL
VEHICLE JERKS DURING VDC/TCS/ABS CONTROL
Diagnosis Procedure
INFOID:0000000001690939
1.
SYMPTOM CHECK
Check if the vehicle jerks during VDC/TCS/ABS control.
Is the inspection result normal?
YES
>> Normal.
NO
>> GO TO 2
2.
CHECK SELF-DIAGNOSIS RESULTS
Perform self-diagnosis of ABS actuator and electric unit (control unit). Refer to
.
Are self-diagnosis results indicated?
YES
>> Check corresponding items, make repairs, and perform ABS actuator and electric unit (control
unit) self-diagnosis.
NO
>> GO TO 3
3.
CHECK CONNECTOR
• Turn ignition switch OFF and disconnect ABS actuator and electric unit (control unit) connector and check
terminal for deformation, disconnection, looseness, etc.
• Securely connect connectors and perform ABS actuator and electric unit (control unit) self-diagnosis.
Are self-diagnosis results indicated?
YES
>> If poor contact, damage, open or short circuit of connector terminal is found, repair or replace.
NO
>> GO TO 4
4.
CHECK ECM AND TCM SELF-DIAGNOSIS RESULTS
Perform ECM and TCM self-diagnosis.
Are self-diagnosis results indicated?
YES
>>
Check the corresponding items.
• ECM: Refer to
EC-74, "CONSULT-III Function (ENGINE)"
• TCM: Refer to
TM-35, "CONSULT-III Function (TRANSMISSION)"
NO
>> Replace ABS actuator and electric unit (control unit). Refer to
BRC-123, "Removal and Installa-
.
NORMAL OPERATING CONDITION
BRC-115
< SYMPTOM DIAGNOSIS >
[VDC/TCS/ABS]
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NORMAL OPERATING CONDITION
Description
INFOID:0000000001690940
Symptom
Result
Slight vibrations are felt on the brake pedal and the operation noises occur, when VDC, TCS or ABS is acti-
vated.
This is a normal condi-
tion due to the VDC,
TCS or ABS activation.
Stopping distance is longer than that of vehicles without ABS when the vehicle drives on rough, gravel, or
snow-covered (fresh, deep snow) roads.
The brake pedal moves and generates noises, when TCS or VDC is activated due to rapid acceleration or
sharp turn.
The brake pedal vibrates and motor operation noises occur from the engine room, after the engine starts and
just after the vehicle starts.
This is normal, and it is
caused by the ABS op-
eration check.
Depending on the road conditions, the driver may experience a sluggish feel.
This is normal, because
TCS places the highest
priority on the optimum
traction (stability).
TCS may activate momentarily if wheel speed changes when driving over location where friction coefficient
varies, when downshifting, or when fully depressing accelerator pedal.
The ABS warning lamp, VDC OFF indicator lamp and SLIP indicator lamp may turn ON when the vehicle is
subject to strong shaking or large vibration, such as when the vehicle is rotating on a turntable or located on
a ship while the engine is running.
In this case, restart the
engine on a normal
road. If the normal con-
dition is restored, there
is no malfunction. At
that time, erase the self-
diagnosis memory.
VDC may not operate normally or the ABS warning lamp, VDC OFF indicator lamp, and SLIP indicator lamp
may illuminate, when running on a special road that is extremely slanted (e.g. bank in a circuit course).
A malfunction may occur in the yaw rate/side/decel G sensor system, when the vehicle turns sharply, such
as during a spin turn, axle turn, or drift driving, while the VDC function is off (VDC OFF indicator lamp illumi-
nated).
The vehicle speed will not increase even though the accelerator pedal is depressed, when inspecting the
speedometer on a 2-wheel chassis dynamometer.
Normal (Deactivate the
VDC/TCS function be-
fore performing an in-
spection on a chassis
dynamometer.)
VDC OFF indicator lamp and SLIP indicator lamp may simultaneously turn on when low tire pressure warn-
ing lamp turns on.
This is not a VDC sys-
tem error but results
from characteristic
change of tire.
BRC-116
< PRECAUTION >
[VDC/TCS/ABS]
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000001297870
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SR and SB section of this Service Man-
ual.
WARNING:
• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal
injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see the SR section.
• Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or har-
ness connectors.
Precaution for Brake System
INFOID:0000000001297871
CAUTION:
• Refer to
MA-10, "Fluids and Lubricants"
for recommended brake fluid.
• Never reuse drained brake fluid.
• Be careful not to splash brake fluid on painted areas; it may cause paint damage. If brake fluid is
splashed on painted areas, wash it away with water immediately.
• To clean or wash all parts of master cylinder and disc brake caliper, use clean brake fluid.
• Never use mineral oils such as gasoline or kerosene. They will ruin rubber parts of the hydraulic sys-
tem.
• Use flare nut wrench when removing and installing brake
tube.
• If a brake fluid leak is found, the part must be disassembled
without fail. Then it has to be replaced with a new one if a
defect exists.
• Turn the ignition switch OFF and remove the connector of the
ABS actuator and electric unit (control unit) or the battery ter-
minal before performing the work.
• Always torque brake lines when installing.
• Burnish the brake contact surfaces after refinishing or replac-
ing rotors, after replacing pads, or if a soft pedal occurs at
very low mileage.
Refer to
(front disc brake) or
(rear disc brake).
WARNING:
• Clean brake pads and shoes with a waste cloth, then wipe with a dust collector.
Precaution for Brake Control
INFOID:0000000001297873
• During ABS operation, the brake pedal may vibrate lightly and a mechanical noise may be heard. This is
normal.
• Just after starting vehicle, the brake pedal may vibrate or a motor operating noise may be heard from engine
compartment. This is a normal status of operation check.
• Stopping distance may be longer than that of vehicles without ABS when vehicle drives on rough, gravel, or
snow-covered (fresh, deep snow) roads.
SBR686C
PRECAUTIONS
BRC-117
< PRECAUTION >
[VDC/TCS/ABS]
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• When an error is indicated by ABS or another warning lamp, collect all necessary information from customer
(what symptoms are present under what conditions) and check for simple causes before starting diagnosis.
Besides electrical system inspection, check brake booster operation, brake fluid level, and fluid leaks.
• If incorrect tire sizes or types are installed on the vehicle or brake pads are not Genuine NISSAN parts, stop-
ping distance or steering stability may deteriorate.
• If there is a radio, antenna or related wiring near control module, ABS function may have a malfunction or
error.
• If aftermarket parts (car stereo, CD player, etc.) have been installed, check for incidents such as harness
pinches, open circuits or improper wiring.
• If the following components are replaced with non-genuine components or modified, the VDC OFF indicator
lamp and SLIP indicator lamp may turn on or the VDC system may not operate properly. Components
related to suspension (shock absorbers, struts, springs, bushings, etc.), tires, wheels (exclude specified
size), components related to brake system (pads, rotors, calipers, etc.), components related to engine (muf-
fler, ECM, etc.), components related to body reinforcement (roll bar, tower bar, etc.).
• Driving with broken or excessively worn suspension components, tires or brake system components may
cause the VDC OFF indicator lamp and the SLIP indicator lamp to turn on, and the VDC system may not
operate properly.
• When the TCS or VDC is activated by sudden acceleration or sudden turn, some noise may occur. The
noise is a result of the normal operation of the TCS and VDC.
• When driving on roads which have extreme slopes (such as mountainous roads) or high banks (such as
sharp curves on a freeway), the VDC may not operate normally, or the VDC warning lamp and the SLIP indi-
cator lamp may turn on. This is not a problem if normal operation can be resumed after restarting the engine.
• Sudden turns (such as spin turns, acceleration turns), drifting, etc. with VDC turned off may cause the yaw
rate/side/decel G sensor to indicate a problem. This is not a problem if normal operation can be resumed
after restarting the engine.
• If battery is removed or steering angle sensor is disconnected, power to steering angle sensor is lost and the
screen goes into steering angle sensor safe mode.
• When screen goes into steering angle sensor safe mode, perform "Adjustment of Steering Angle Sensor
Neutral Position" with CONSUT-II and check that VDC OFF indicator turns off. Additionally, perform self-
diagnosis, check that only "Steering Angle Sensor Safe Mode" is shown for self-diagnostic result, and then
delete the memory. (If the self-diagnostic result shows an indication other than "Steering Angle Sensor Safe
Mode", repair the relevant part and restart self-diagnosis.) The steering angle sensor is released and returns
to normal condition by performing the above operation.
• When checking, if only "Steering Angle Sensor Safe Mode" is shown in the self-diagnostic result and VDC
OFF indicator is off, delete history of malfunction. This happens when battery power supply is lost and the
screen goes into Steering Angle Sensor Safe Mode, and then screen returns to normal mode automatically
by driving the vehicle in a straight forward direction [for approximately 30 seconds at 20 km/h (12 MPH) or
more] after power is supplied again.
NOTE:
VDC OFF indicator lamp is on when VDC OFF switch is on.
Precaution for CAN System
INFOID:0000000001297874
• Do not apply voltage of 7.0V or higher to terminal to be measured.
• Maximum open terminal voltage of tester in use must be less than 7.0V.
• Before checking harnesses, turn ignition switch OFF and disconnect battery negative cable.
• Area to be repaired must be soldered and wrapped with tape.
Make sure that fraying of twisted wire is within 110 mm (4.33 in).
PKIA0306E
BRC-118
< PRECAUTION >
[VDC/TCS/ABS]
PRECAUTIONS
• Do not make a bypass connection to repaired area. (If the circuit is
bypassed, characteristics of twisted wire will be lost.)
PKIA0307E
PREPARATION
BRC-119
< PREPARATION >
[VDC/TCS/ABS]
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PREPARATION
PREPARATION
Special Service Tool
INFOID:0000000001297875
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool name
Description
KV991J0080
(J-45741)
ABS active wheel sensor tester
Checking operation of ABS active wheel sen-
sors
ST30031000
(
—
)
Bearing puller
Removing sensor rotor
ST30720000
(J-25405)
Drift
Installing rear sensor rotor
a: 77 mm (0.03 in) dia.
b: 55 mm (2.17 in) dia.
ST27863000
(
—
)
Drift
Installing rear sensor rotor
a: 75 mm (2.95 in) dia.
b: 62 mm (2.44 in) dia.
KV40104710
(
—
)
Drift
Installing rear sensor rotor
a: 76 mm (2.99 in) dia.
b: 68.5 mm (2.697 in) dia.
WFIA0101E
ZZA0700D
ZZA0701D
ZZA0832D
ZZA0832D
BRC-120
< PREPARATION >
[VDC/TCS/ABS]
PREPARATION
Commercial Service Tool
INFOID:0000000001297876
Tool name
Description
1. Flare nut crowfoot
2. Torque wrench
Removing and installing brake piping
a: 10 mm (0.39 in)/12 mm (0.47 in)
S-NT360
WHEEL SENSORS
BRC-121
< REMOVAL AND INSTALLATION >
[VDC/TCS/ABS]
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REMOVAL AND INSTALLATION
WHEEL SENSORS
Removal and Installation
INFOID:0000000001297879
REMOVAL
1.
Remove wheel and tire using power tool.
2.
Remove wheel sensor bolt.
NOTE:
• When removing front wheel sensor, first remove the disc rotor to gain access to the front wheel sensor
bolt. Refer to
BR-29, "Removal and Installation of Brake Caliper and Disc Rotor"
.
• When removing rear wheel sensor, first remove spare tire.
3.
Pull out the wheel sensor, being careful to turn it as little as possible.
CAUTION:
• Be careful not to damage sensor edge and sensor rotor teeth.
• Do not pull on the sensor harness.
4.
Disconnect wheel sensor harness electrical connector, then remove harness from mounts.
INSTALLATION
Installation is in the reverse order of removal. When installing wheel and tire, refer to
.
CAUTION:
• Inspect wheel sensor O-ring, replace sensor assembly if damaged.
• Clean wheel sensor hole and mounting surface with brake cleaner and a lint-free shop rag. Be care-
ful that dirt and debris do not enter the axle.
NOTE:
• Apply a coat of suitable grease to the wheel sensor O-ring and mounting hole.
• Tighten wheel sensor bolt to specification.
WFIA0333E
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