Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Infiniti QX4 R50 1997-1998.2001 Approved QX4-R50-2001 br
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BRAKE SYSTEM GI
SECTION BR MA
EM
LC
EC
CONTENTS FE
PRECAUTIONS ...............................................................3 OPERATING CHECK ...............................................19
AT
Supplemental Restraint System (SRS) AIR AIRTIGHT CHECK ...................................................19
BAG and SEAT BELT PRE-TENSIONER...............3 Removal.....................................................................19 TF
Precautions for Brake System.....................................3 Inspection...................................................................19
Wiring Diagrams and Trouble Diagnoses....................4 OUTPUT ROD LENGTH CHECK ..............................19
PREPARATION ...............................................................5 Installation..................................................................20 PD
Special Service Tools ..................................................5 VACUUM PIPING...........................................................21
Commercial Service Tools ...........................................5 Vacuum Hose ............................................................21
NOISE, VIBRATION AND HARSHNESS (NVH) Removal and Installation ...........................................21 AX
TROUBLESHOOTING .....................................................6 Inspection...................................................................21
NVH Troubleshooting Chart.........................................6 HOSES AND CONNECTORS ...................................21
CHECK VALVE ........................................................21 SU
ON-VEHICLE SERVICE ..................................................7
FRONT DISC BRAKE ...................................................22
Checking Brake Fluid Level.........................................7
Components...............................................................22
Checking Brake Line ...................................................7
Pad Replacement ......................................................22
Changing Brake Fluid ..................................................7
Removal.....................................................................23
Bleeding Brake System ...............................................8
BRAKE HYDRAULIC LINE .............................................9
Disassembly...............................................................24 ST
Inspection...................................................................24
Hydraulic Circuit...........................................................9
CALIPER .................................................................24
Removal.....................................................................10
ROTOR ...................................................................24 RS
Inspection...................................................................10
Assembly ...................................................................25
Installation..................................................................10
Installation..................................................................25
PROPORTIONING VALVE (2WD) ................................11
Brake Burnishing Procedure......................................25 BT
Inspection...................................................................11
REAR DRUM BRAKE ...................................................26
Removal and Installation (Built-in type).....................11
Components...............................................................26
LOAD SENSING VALVE (4WD) ...................................12 HA
Removal.....................................................................26
Inspection...................................................................12
Inspection...................................................................27
Removal and Installation ...........................................12
BRAKE PEDAL AND BRACKET..................................14
WHEEL CYLINDER ..................................................27 SC
Wheel Cylinder Overhaul...........................................28
Removal and Installation ...........................................14 Inspection...................................................................28
Inspection...................................................................14 DRUM .....................................................................28 EL
Adjustment .................................................................14 LINING ....................................................................28
MASTER CYLINDER.....................................................16 Installation..................................................................28
Removal.....................................................................16 PARKING BRAKE CONTROL ......................................30 IDX
Disassembly...............................................................16 Components...............................................................30
Inspection...................................................................17 Removal and Installation ...........................................30
Assembly ...................................................................17 Inspection...................................................................30
Installation..................................................................18 Adjustment .................................................................31
BRAKE BOOSTER........................................................19
On-vehicle Service.....................................................19
CONTENTS (Cont'd)
ABS Wheel Sensor or Rotor..............................................56
DIAGNOSTIC PROCEDURE .....................................56
DESCRIPTION ...............................................................32
ABS Actuator Solenoid Valve or Solenoid Valve
Purpose......................................................................32
Relay..........................................................................59
Operation ...................................................................32 DIAGNOSTIC PROCEDURE .....................................59
ABS Hydraulic Circuit ................................................32 Motor Relay or Motor.................................................61
System Components .................................................33 DIAGNOSTIC PROCEDURE .....................................61
System Description....................................................33 Low Voltage ...............................................................63
SENSOR .................................................................33 DIAGNOSTIC PROCEDURE .....................................63
CONTROL UNIT (BUILT-IN ABS ACTUATOR AND G Sensor and Circuit .................................................65
ELECTRIC UNIT) .....................................................33 DIAGNOSTIC PROCEDURE .....................................65
ABS ACTUATOR AND ELECTRIC UNIT ....................33 ELECTRICAL COMPONENT INSPECTION ................67
G SENSOR (4WD MODELS ONLY) ..........................34
Control Unit................................................................68
Component Parts and Harness Connector DIAGNOSTIC PROCEDURE .....................................68
Location .....................................................................35 TROUBLE DIAGNOSES FOR SYMPTOMS .................69
Schematic ..................................................................36 1. ABS Works Frequently ..........................................69
Wiring Diagram - ABS - .............................................37 2. Unexpected Pedal Action ......................................69
ON BOARD DIAGNOSTIC SYSTEM 3. Long Stopping Distance ........................................70
DESCRIPTION ...............................................................41 4. ABS Does Not Work..............................................71
Self-diagnosis ............................................................41 5. Pedal Vibration and Noise.....................................71
FUNCTION ..............................................................41
6. Warning Lamp Does Not Come On When
SELF-DIAGNOSIS PROCEDURE ..............................41
Ignition Switch Is Turned On .....................................72
HOW TO READ SELF-DIAGNOSTIC RESULTS
7. Warning Lamp Stays On When Ignition Switch
(MALFUNCTION CODES) ........................................42
HOW TO ERASE SELF-DIAGNOSTIC RESULTS Is Turned On..............................................................74
(MALFUNCTION CODES) ........................................42 8. Vehicle Vibrates Excessively When ABS Is
CONSULT-II ...............................................................43 Operating ...................................................................77
CONSULT-II APPLICATION TO ABS..........................43 REMOVAL AND INSTALLATION .................................80
ECU (ABS CONTROL UNIT) PART NUMBER Front Wheel Sensor...................................................80
MODE .....................................................................43 Rear Wheel Sensor ...................................................80
CONSULT-II Inspection Procedure............................44 Front Sensor Rotor ....................................................81
SELF-DIAGNOSIS PROCEDURE ..............................44 REMOVAL ...............................................................81
SELF-DIAGNOSTIC RESULTS MODE.......................45 INSTALLATION........................................................81
DATA MONITOR PROCEDURE ................................46 Rear Sensor Rotor.....................................................81
ACTIVE TEST PROCEDURE ....................................47 REMOVAL ...............................................................81
DATA MONITOR MODE ...........................................48 INSTALLATION........................................................81
ACTIVE TEST MODE ...............................................48 G Sensor....................................................................81
TROUBLE DIAGNOSIS - INTRODUCTION..................49 ABS Actuator and Electric Unit..................................82
How to Perform Trouble Diagnoses for Quick REMOVAL ...............................................................82
and Accurate Repair ..................................................49 INSTALLATION........................................................82
INTRODUCTION ......................................................49
TROUBLE DIAGNOSIS - BASIC INSPECTION ...........50 SERVICE DATA AND SPECIFICATIONS (SDS) .........83
Preliminary Check......................................................50 General Specifications...............................................83
Ground Circuit Check ................................................53 Disc Brake .................................................................83
ABS ACTUATOR AND ELECTRIC UNIT GROUND.....53 Drum Brake................................................................83
TROUBLE DIAGNOSIS - GENERAL Brake Pedal ...............................................................83
DESCRIPTION ...............................................................54 Parking Brake Control ...............................................84
Malfunction Code/Symptom Chart.............................54
TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC
ITEMS.............................................................................56
BR-2
PRECAUTIONS
Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER"
Supplemental Restraint System (SRS) "AIR
BAG" and "SEAT BELT PRE-TENSIONER"
The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER" used along with
NBBR0001
GI
a seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of
collision. The SRS system composition which is available to INFINITI QX4 is as follows: MA
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