Nissan Sentra 2005 User Manual

BRC-1
BRAKE CONTROL SYSTEM
F BRAKES
CONTENTS
C
D
E
G
H
I
J
K
L
M
SECTION
A
B
BRC
Revision: July 2005 2005 Sentra
ABS
PRECAUTIONS .......................................................... 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 3
Precautions for Brake System .................................. 3
Wiring Diagrams and Trouble Diagnosis .................. 3
PREPARATION ........................................................... 4
Special Service Tools ............................................... 4
Commercial Service Tools ........................................ 4
DESCRIPTION ............................................................ 5
Purpose .................................................................... 5
Operation ................................................................. 5
ABS Hydraulic Circuit ............................................... 5
System Components ................................................ 6
System Description .................................................. 6
SENSOR ............................................................... 6
CONTROL UNIT (BUILT-IN ABS ACTUATOR
AND ELECTRIC UNIT) ......................................... 6
ABS ACTUATOR AND ELECTRIC UNIT .............. 7
Component Parts and Harness Connector Location ..... 8
Schematic ................................................................ 9
Wiring Diagram — ABS — ..................................... 10
ON BOARD DIAGNOSTIC SYSTEM DESCRIP-
TION .......................................................................... 14
Self-diagnosis ......................................................... 14
FUNCTION .......................................................... 14
SELF-DIAGNOSIS PROCEDURE ...................... 14
HOW TO READ SELF-DIAGNOSTIC RESULTS
(MALFUNCTION CODES) .................................. 15
HOW TO ERASE SELF-DIAGNOSTIC
RESULTS (MALFUNCTION CODES) ................. 15
CONSULT-II Function (ABS) .................................. 16
ECU (ABS CONTROL UNIT) PART NUMBER
MODE .................................................................. 16
CONSULT-II Inspection Procedure ......................... 16
SELF-DIAGNOSIS PROCEDURE ...................... 16
SELF-DIAGNOSTIC RESULTS MODE ............... 17
DATA MONITOR PROCEDURE .......................... 18
ACTIVE TEST PROCEDURE ............................. 19
DATA MONITOR MODE ...................................... 20
ACTIVE TEST MODE ......................................... 21
TROUBLE DIAGNOSIS — INTRODUCTION ........... 22
How to Perform Trouble Diagnoses for Quick and
Accurate Repair ...................................................... 22
INTRODUCTION ................................................. 22
TROUBLE DIAGNOSIS — BASIC INSPECTION .... 23
Preliminary Check .................................................. 23
Ground Circuit Check ............................................. 25
ABS ACTUATOR AND ELECTRIC UNIT
GROUND ............................................................ 25
TROUBLE DIAGNOSIS — GENERAL DESCRIP-
TION .......................................................................... 26
Malfunction Code/Symptom Chart .......................... 26
WHEEL SENSOR OR ROTOR ................................. 27
Diagnostic Procedure ............................................. 27
ABS ACTUATOR SOLENOID VALVE AND SOLE-
NOID VALVE RELAY ................................................ 29
Diagnostic Procedure ............................................. 29
MOTOR RELAY OR MOTOR .................................... 31
Diagnostic Procedure ............................................. 31
LOW VOLTAGE ........................................................ 33
Diagnostic Procedure ............................................. 33
CONTROL UNIT ....................................................... 35
Diagnostic Procedure ............................................. 35
TROUBLE DIAGNOSES FOR SYMPTOMS ............ 36
Symptom 1. ABS Works Frequently ....................... 36
Symptom 2. Unexpected Pedal Action ................... 36
Symptom 3. Long Stopping Distance ..................... 37
Symptom 4. ABS Does Not Work ........................... 38
Symptom 5. Pedal Vibration and Noise .................. 38
Symptom 6. Warning Lamp Does Not Come On
When Ignition Switch Is Turned On ........................ 39
Symptom 7. Warning Lamp Stays On When Ignition

Nissan Sentra 2005 Specifications

General

Brand	Nissan
Model	Sentra 2005
Category	Automobile
Language	English

Summary

PRECAUTIONS

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

Safety precautions for SRS airbag and seat belt pre-tensioner systems during service.

Precautions for Brake System

Essential safety guidelines and fluid handling for brake system maintenance.

Wiring Diagrams and Trouble Diagnosis

Guidance on interpreting electrical schematics and troubleshooting methodologies.

PREPARATION

Special Service Tools

Lists and describes specialized tools required for ABS system service.

Commercial Service Tools

Lists common commercial tools used for brake line and piping work.

DESCRIPTION

Purpose and Operation

Explains ABS objectives and how the system functions, including self-test.

System Components and Hydraulics

Details hydraulic circuit, components, and system overview.

ABS Wiring and Schematics

Provides the ABS system schematic and wiring diagrams for diagnosis.

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Self-diagnosis Procedures

Covers self-diagnosis function, procedure, and reading/erasing results.

CONSULT-II Diagnostics

Details CONSULT-II functions, inspection procedures, and diagnostic modes.

TROUBLE DIAGNOSIS — INTRODUCTION

How to Perform Trouble Diagnoses for Quick and Accurate Repair

General approach and tips for effective ABS troubleshooting.

Introduction to ABS Diagnosis

Basic principles of ABS system control and troubleshooting common issues.

TROUBLE DIAGNOSIS — BASIC INSPECTION

Preliminary Check

Initial visual and functional checks of brake fluid, lines, and booster.

Ground Circuit Check

Procedure to verify the ground connection for the ABS actuator and electric unit.

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

Malfunction Code/Symptom Chart

Correlates diagnostic codes with parts and reference pages for troubleshooting.

WHEEL SENSOR OR ROTOR

Diagnostic Procedure and Connector Checks

Steps for troubleshooting wheel sensors, including connector inspection and electrical checks.

Sensor Electrical and Mechanical Checks

Verifies sensor resistance, tire condition, wheel bearing, and sensor rotor integrity.

ABS ACTUATOR SOLENOID VALVE AND SOLENOID VALVE RELAY

Solenoid Valve Relay Troubleshooting

Checks fusible link, connector, ground, and power supply for solenoid valve relay.

Solenoid Valve Power Supply and Short Checks

Verifies power supply circuit and checks for shorts in the solenoid valve relay.

MOTOR RELAY OR MOTOR

Motor Relay and Ground Circuit Checks

Inspects fusible link, connector, and ground circuit for the motor relay.

Motor Power Supply and Short Circuit Checks

Verifies motor relay power supply and tests for shorts in the circuit.

LOW VOLTAGE

Fuse, Connector, and Ground Checks

Verifies fuse, connector, and ground circuit for low voltage issues.

Power Supply and Short Circuit Checks

Tests power supply circuit and checks for shorts related to low voltage.

CONTROL UNIT

Control Unit Diagnostics and Checks

Covers connector, power supply checks, and self-diagnosis result verification for the control unit.

TROUBLE DIAGNOSES FOR SYMPTOMS

Symptom 1: ABS Works Frequently

Diagnostic steps for frequent ABS activation.

Symptom 2: Unexpected Pedal Action

Troubleshooting for abnormal brake pedal feel.

Symptom 3: Long Stopping Distance

Diagnostic steps for increased stopping distances.

Symptom 4: ABS Does Not Work

Troubleshooting when the ABS system fails to activate.

Symptom 5: Pedal Vibration and Noise

Diagnostic steps for pedal vibration and noise.

Symptom 6: Warning Lamp Off at Startup

Troubleshooting for the ABS warning lamp not coming on at ignition.

Symptom 7: Warning Lamp Stays On

Diagnostic steps when the ABS warning lamp remains illuminated.

REMOVAL AND INSTALLATION

Wheel Sensor Removal and Installation

Procedures for removing and installing front and rear wheel speed sensors.

Sensor Rotor and Actuator Service

Steps for removing/installing the sensor rotor and the ABS actuator.