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ANTI LOCK BRAKING SYSTEM (ABS)
ANTI-LOCK
BRAKING
SYSTEM (ABS)
TABLE OF CONTENTS
6.2.1
GENERAL
INFORMATION
............................................................................................1
6.2.1.1
NECESSITY OF ABS WITH EBD ................................................................................................... 1
6.2.1.2
TECHNICAL SPECIFICATIONS..................................................................................................... 2
6.2.1.3
TIGHTENING TORQUES ................................................................................................................ 3
6.2.1.4
SCHEMATIC OF HYDRAULIC CIRCUIT........................................................................................ 5
6.2.1.5
WORKING OF ANTI-LOCK BRAKING SYSTEM
(ABS)
................................................................ 6
6.2.1.6
COMPONENTS ............................................................................................................................. 10
A.
ABS ELECTRONIC CONTROL UNIT / HYDRAULIC CONTROL UNIT
(ECU / HCU)
.................. 11
B. WHEEL SPEED SENSOR
(WSS)
................................................................................................. 14
C. ABS SYSTEM FAILURE WARNING LIGHT.................................................................................. 15
6.2.2
REPAIRS ........................................................................................................................16
A.
ABS ECU / HCU............................................................................................................................. 16
B.
FRONT WHEEL SPEED SENSOR ............................................................................................... 19
C.
FRONT TONER RING ................................................................................................................... 20
D.
REAR WHEEL SPEED SENSOR.................................................................................................. 20
E.
REAR TONER RING...................................................................................................................... 22
6.2.3
TROUBLE SHOOTING AND DIAGNOSIS .....................................................................23
A.
ROAD TEST................................................................................................................................... 23
B.
TABLE OF ABS 8.1 - FALL-BACK LEVEL .................................................................................... 23
6.2.4
ABS DIAGNOSTIC USER MANUAL..............................................................................24
6.2.4.1 GENERAL ...................................................................................................................................... 24
6.2.4.2 OPERATING PROCEDURE.......................................................................................................... 25