Nissan Qashqai (2007-2010). Manual — part 716

BRC-62

< SYMPTOM DIAGNOSIS >

[ABS]

PEDAL VIBRATION OR ABS OPERATION SOUND OCCURS

PEDAL VIBRATION OR ABS OPERATION SOUND OCCURS

Diagnosis Procedure

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CAUTION:

Under the following conditions, ABS is activated and vibration is felt when brake pedal is lightly
depressed (just place a foot on it). 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-17, "CONSULT-III 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

NORMAL OPERATING CONDITION

BRC-63

< SYMPTOM DIAGNOSIS >

[ABS]

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NORMAL OPERATING CONDITION

Description

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Symptom

Result

Slight vibrations are felt on the brake pedal and the operation noises occur, when ABS is activated.

This is a normal condi-
tion due to the ABS acti-
vation.

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 vibrates and motor operation noises occur from the engine room, after the engine starts and
just after the vehicle starts.

This is a normal, and it is
caused by the ABS op-
eration check.

BRC-64

< PRECAUTION >

[ABS]

PRECAUTIONS

PRECAUTION

PRECAUTIONS

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

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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 SRS 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 that 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 SRS 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

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WARNING:

Clean brake pads and shoes with a waste cloth, then wipe with a dust collector.
• Only use DOT 4 brake fluid. Refer to

MA-21, "Fluids and Lubricants"

.

• Never to reuse drained brake fluid.
• Never to spill or splash brake fluid on painted surfaces. Brake fluid may seriously damage paint. Wipe it off

immediately and wash with water if it gets on a painted surface.

• Never to use mineral oils such as gasoline or light oil. They may damage rubber parts and cause improper

operation.

• Always loosen the brake tube flare nut with a flare nut wrench.
• Tighten the brake tube flare nut to the specified torque with a flare

nut torque wrench.

• Always conform the specified tightening torque when installing the

brake pipes.

• Brake system is an important safety part. If a brake fluid leak is

detected, always disassemble the affected part. If a malfunction is
detected, replace part with a new one.

• Turn the ignition switch OFF and disconnect the ABS actuator and

electric unit (control unit) connector or the battery negative terminal
before performing the work.

Precaution for Brake Control

INFOID:0000000000925086

• Just after starting vehicle after ignition switch ON, brake pedal may vibrate or motor operating noise may be

heard from engine compartment. This is normal condition.

• 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 diagnostic
servicing. Besides electrical system inspection, check brake booster operation, brake fluid level, and oil
leaks.

• If tire size and type are used in an improper combination, or brake pads are not Genuine NISSAN parts,

stopping distance or steering stability may deteriorate.

• ABS might be out of order or malfunctions by putting a radio (wiring inclusive), an antenna and a lead-in wire

near the control unit.

SBR820BA

PRECAUTIONS

BRC-65

< PRECAUTION >

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• If aftermarket parts (car stereo, CD player, etc.) have been installed, check for incidents such as harness

pinches, open circuits, and improper wiring.