Nissan Pathfinder (2012 year). Manual - part 104

 

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Nissan Pathfinder (2012 year). Manual - part 104

 

 

BRC-98

< SYMPTOM DIAGNOSIS >

[TYPE 1]

EXCESSIVE ABS FUNCTION OPERATION FREQUENCY

EXCESSIVE ABS FUNCTION OPERATION FREQUENCY

Diagnosis Procedure

INFOID:0000000007356796

1.

CHECK START

Check front and rear brake force distribution using a brake tester.
Is the inspection result normal?

YES

>> GO TO 2

NO

>> Check brake system.

2.

CHECK FRONT AND REAR AXLE

Make sure that there is no excessive play in the front and rear axles. Refer to front: 

FAX-6, "On-Vehicle

Inspection and Service"

, Rear: 

RAX-6, "On-Vehicle Inspection and Service"

.

Is the inspection result normal?

YES

>> GO TO 3

NO

>> Repair or replace malfunctioning components.

3.

CHECK WHEEL SENSOR AND SENSOR ROTOR

Check the following.

• Wheel sensor installation for damage.

• Sensor rotor installation for damage. 

• Wheel sensor connector connection.

• Wheel sensor harness inspection.
Is the inspection result normal?

YES

>> GO TO 4

NO

>> • Replace wheel sensor or sensor rotor. Refer to 

BRC-110, "Removal and Installation"

 (wheel

sensor) or 

BRC-111, "Removal and Installation"

 (sensor rotor).

• Repair harness.

4.

CHECK ABS WARNING LAMP DISPLAY

Make sure that the ABS warning lamp is turned off after the ignition switch is turned ON or when driving. 
Is the ABS warning lamp illuminated?

YES

>> Perform self-diagnosis. Refer to 

BRC-29, "CONSULT Function (ABS)"

.

NO

>> Inspection End.

August 2012

2012 Pathfinder

UNEXPECTED PEDAL REACTION

BRC-99

< SYMPTOM DIAGNOSIS >

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UNEXPECTED PEDAL REACTION

Diagnosis Procedure

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1.

CHECK BRAKE PEDAL STROKE

Check brake pedal stroke. Refer to 

BR-17, "Inspection and Adjustment - Standard Pedal"

 or 

BR-18, "Inspec-

tion and Adjustment - Adjustable Pedal"

.

Is the stroke too large?

YES

>> • Bleed air from brake tube and hose. Refer to 

BR-20, "Bleeding Brake System"

.

• Check brake pedal, brake booster, and master cylinder for mount play, looseness, brake system

fluid leakage, etc. Refer to 

BR-17, "Inspection and Adjustment - Standard Pedal"

 or 

BR-18,

"Inspection and Adjustment - Adjustable Pedal"

 (brake pedal),  

BR-50, "Disassembly and

Assembly"

 (master cylinder), 

BR-10, "Inspection"

 (brake booster).

NO

>> GO TO 2

2.

CHECK FUNCTION

Disconnect ABS actuator and electric unit (control unit) connector to deactivate ABS. Check if braking force is

normal in this condition. Connect connector after inspection.
Is the inspection result normal?

YES

>> Inspection End.

NO

>> Check brake system.

August 2012

2012 Pathfinder

BRC-100

< SYMPTOM DIAGNOSIS >

[TYPE 1]

THE BRAKING DISTANCE IS LONG

THE BRAKING DISTANCE IS LONG

Diagnosis Procedure

INFOID:0000000007356798

CAUTION:

The stopping distance on slippery road surfaces might be longer with the ABS operating than when

the ABS is not operating.

1.

CHECK FUNCTION

Turn ignition switch OFF and disconnect ABS actuator and electric unit (control unit) connector to deactivate

ABS. In this condition, check stopping distance. After inspection, connect connector.
Is the inspection result normal?

YES

>> Inspection End.

NO

>> Check brake system.

August 2012

2012 Pathfinder

ABS FUNCTION DOES NOT OPERATE

BRC-101

< SYMPTOM DIAGNOSIS >

[TYPE 1]

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ABS FUNCTION DOES NOT OPERATE

Diagnosis Procedure

INFOID:0000000007356799

CAUTION:

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

1.

CHECK ABS WARNING LAMP DISPLAY

Make sure that the ABS warning lamp turns OFF after ignition switch is turned ON or when driving.
Is the inspection result normal?

YES

>> Inspection End.

NO

>> Perform self-diagnosis. Refer to 

BRC-29, "CONSULT Function (ABS)"

August 2012

2012 Pathfinder

BRC-102

< SYMPTOM DIAGNOSIS >

[TYPE 1]

PEDAL VIBRATION OR ABS OPERATION SOUND OCCURS

PEDAL VIBRATION OR ABS OPERATION SOUND OCCURS

Diagnosis Procedure

INFOID:0000000007356800

CAUTION:

Under the following conditions, ABS is activated and vibration is felt when brake pedal is lightly

depressed. However, this is normal.

• When shifting gears

• When driving on slippery road

• During cornering at high speed

• When passing over bumps or grooves [at approximately 50 mm (1.97 in) or more]

• When pulling away just after starting engine [at approximately 10 km/h (6 MPH) or higher]

1.

SYMPTOM CHECK 1

Check that there are pedal vibrations when the engine is started.
Do vibrations occur?

YES

>> GO TO 2

NO

>> Inspect the brake pedal.

2.

SYMPTOM CHECK 2

Check that there are ABS operation noises when the engine is started.
Do the operation noises occur?

YES

>> GO TO 3

NO

>> Perform self -diagnosis. Refer to 

BRC-29, "CONSULT Function (ABS)"

.

3.

SYMPTOM CHECK 3

Check symptoms when electrical component (headlamps, etc.) switches are operated.
Do symptoms occur?

YES

>> Check if there is a radio, antenna, antenna lead wire, or wiring close to the control unit. If there is,

move it farther away.

NO

>> Inspection End.

August 2012

2012 Pathfinder

VEHICLE JERKS DURING VDC/TCS/ABS CONTROL

BRC-103

< SYMPTOM DIAGNOSIS >

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VEHICLE JERKS DURING VDC/TCS/ABS CONTROL

Diagnosis Procedure

INFOID:0000000007356801

1.

SYMPTOM CHECK

Check if the vehicle jerks during VDC/TCS/ABS control.
Is the inspection result normal?

YES

>> Inspection End.

NO

>> GO TO 2

2.

CHECK SELF-DIAGNOSIS RESULTS

Perform self-diagnosis of ABS actuator and electric unit (control unit). Refer to 

BRC-29, "CONSULT Function

(ABS)"

.

Are self-diagnosis results indicated?

YES

>> Check corresponding items, make repairs, and perform ABS actuator and electric unit (control

unit) self-diagnosis. Refer to 

BRC-29, "CONSULT Function (ABS)"

.

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. Refer to 

EC-77, "CONSULT Function"

 or 

TM-37, "CONSULT Function

(TRANSMISSION)"

.

Are self-diagnosis results indicated?

YES

>> Check the corresponding items.

• ECM: Refer to 

EC-77, "CONSULT Function"

.

• TCM: Refer to 

TM-37, "CONSULT Function (TRANSMISSION)"

.

NO

>> Replace ABS actuator and electric unit (control unit). Refer to 

BRC-112, "Removal and Installa-

tion"

.

August 2012

2012 Pathfinder

BRC-104

< SYMPTOM DIAGNOSIS >

[TYPE 1]

NORMAL OPERATING CONDITION

NORMAL OPERATING CONDITION

Description

INFOID:0000000007356802

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 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 and SLIP indicator lamp may illuminate, when run-
ning 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.)

SLIP indicator lamp may simultaneously turn on when low tire pressure warning lamp turns on.

This is not a VDC sys-
tem error but results 
from characteristic 
change of tire.

August 2012

2012 Pathfinder

PRECAUTIONS

BRC-105

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PRECAUTION

PRECAUTIONS

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT 
PRE-TENSIONER"

INFOID:0000000007356803

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.

PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS

WARNING:

• When working near the Airbag Diagnosis Sensor Unit or other Airbag System sensors with the Igni-

tion ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s) with a

hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly causing

serious injury.

• When using air or electric power tools or hammers, always switch the Ignition OFF, disconnect the

battery, and wait at least 3 minutes before performing any service.

Precaution Necessary for Steering Wheel Rotation After Battery Disconnect

INFOID:0000000007356804

NOTE:

• This Procedure is applied only to models with Intelligent Key system and NATS (NISSAN ANTI-THEFT SYS-

TEM).

• Remove and install all control units after disconnecting both battery cables with the ignition knob in the

LOCK

 position.

• Always use CONSULT to perform self-diagnosis as a part of each function inspection after finishing work. If

DTC is detected, perform trouble diagnosis according to self-diagnostic results.

For models equipped with the Intelligent Key system and NATS, an electrically controlled steering lock mech-

anism is adopted on the key cylinder.

For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and

steering wheel rotation will become impossible.

If steering wheel rotation is required when battery power is interrupted, follow the procedure below before

starting the repair operation.

OPERATION PROCEDURE

1. Connect both battery cables.

NOTE:

Supply power using jumper cables if battery is discharged.

2. Use the Intelligent Key or mechanical key to turn the ignition switch to the 

ACC

 position. At this time, the

steering lock will be released.

3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be

rotated.

4. Perform the necessary repair operation.

August 2012

2012 Pathfinder

 

 

 

 

 

 

 

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