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
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