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ORN/BLU
RIGHT
REAR
ABS
SPEED
SENSOR
44-1
ANTI-LOCK BRAKE SYSTEM (ABS)
Circuit Schematic
10
ELECTRONIC
BRAKE CONTROL
MODULE (EBCM)
Solid-state:
Do not check
resistance.
C-4
Wheel
speed
input
Brake
input
WHT
ORN
C-4
2
3
18
17
WHT
ORN
F-2
2
1
Wheel
speed
input
22
23
20
19
2
1
LEFT
REAR
ABS
SPEED
SENSOR
WHT/BLU
ORN/BLU
WHT
BLK
BLK
WHT
LO
HI
LO
HI
14
BLK
H-16
WHT/BLU
F-3
BLK
BLK
6
VIO/WHT
A12
C-1
POWERTRAIN
CONTROL
MODULE
(PCM)
Solid-state:
Do not check
resistance.
“Reverse”
or “L”
range
output
Brake Lights,
Cruise Control,
Torque-on-Demand
(T.O.D.) System
1
C-37
RED
4
C-37
RED
RED
GRN
Shift
Interlock
System
GRN
GRN
HOT AT ALL TIMES
CB-13
STOP LIGHT
15A
DASH
FUSE
BOX
BRAKE SWITCH
Closed with
brake pedal
depressed.
C-37A
4
1
C-37A
Brake
Lights
NOISE
SUPPRESSION
FILTER #1
GRN
Brake
Lights
NOISE
SUPPRESSION
FILTER #1
RED
GRN
44-2
ANTI-LOCK BRAKE SYSTEM (ABS)
Circuit Schematic
EB-17
ABS
40A
WHT/GRN
FUSE/
RELAY
BOX
Battery
14
YEL/GRN
HOT AT ALL TIMES
13
ELECTRONIC
BRAKE
CONTROL
MODULE
(EBCM)
Solid-state:
Do not check
resistance.
HOT IN ON OR START
CB-4
METER
10A
YEL
2
B-5
14
B-8
DASH
FUSE
BOX
“ABS”
INDICATOR
LIGHT
YEL
Indicators
15
H-19
YEL
YEL
METER
ASSEMBLY
16
C-4
Battery
“ABS”
Indicator
light
control
EB-13
ABS
20A
FUSE/
RELAY
BOX
WHT/GRN
27
“ABS
active”
output
9
4WD
engaged
input
WHT/GRN
LT GRN/RED
PNK
See Dash,
Fuse Box,
page 11-5.
T.O.D.
CONTROL
UNIT
6
C-43
3
C-44
“ABS”
active
input
4WD
engaged
output
Component Location Index
ANTI-LOCK BRAKE SYSTEM (ABS)
(Refer to Section 201 for photographs.)
Component
Photo No.
Brake Switch
Below I/P, on brake pedal support
44
. . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dash Fuse Box
Behind left I/P side trim panel
36
. . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Data Link Connector (DLC)
C-63
Below left side of I/P, near engine hood release
38
. . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Electronic Brake Control
Module (EBCM)
In right rear of engine compartment
23
. . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuse/Relay Box
Right side of engine compartment, on inner fender panel
18
. . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . .
G Sensor - ABS
Beneath rear of center console
64
. . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Left Front ABS Speed
Sensor
Inside of left front wheel
4
. . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Left Rear ABS Speed
Sensor
Inside of left rear wheel
88
. . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Powertrain Control Module
(PCM)
Behind front console
52
. . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Right Front ABS Speed
Sensor
Inside of right front wheel
4
. . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Right Rear ABS Speed
Sensor
Inside of right rear wheel
88
. . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T.O.D. Control Unit
Below right front seat
66
. . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connector
B-5 (16-WHT)
Behind left side of I/P, on rear of meter assembly
49
. . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . .
B-8 (16-BLK)
Behind left side of I/P, on rear of meter assembly
49
. . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . .
C-13 (2-BRN)
Lower left side of engine compartment
6
. . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C-37 (4-BLK)
Behind lower left of I/P
44
. . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C-41 (2-BRN)
Lower right side of engine compartment
6
. . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
F-2 (2-BRN)
Beneath rear of vehicle, above right side of differential
86
. . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . .
F-3 (2-BLK)
Beneath rear of vehicle, above right side of differential
86
. . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . .
H-15 (18-BLK)
Behind left side of I/P, above left kick panel on bracket
42
. . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . .
H-19 (22-WHT)
Behind I/P right side panel
58
. . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ground
C-31
Behind right kick panel
57
. . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C-39
Right rear of engine compartment on inner fender
23
. . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
E-28
Top left rear of engine
28
. . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
44-3
Circuit Operation
The anti-lock brake system adjusts the brake pressure
whenever a wheel is about to lockup, allowing the driver
to maintain greater control of the vehicle under heavy
braking conditions. Under normal driving conditions,
the anti-lock brake system (ABS) functions the same as
a standard power assisted brake system.
The electronic brake control module (EBCM) receives
inputs from individual ABS speed sensors and the G-
sensor. The electronic brake control module (EBCM)
uses the inputs to control the hydraulic pressure
applied to each caliper.
The electronic brake control module (EBCM) has a self-
diagnosis function which monitors the system’s func-
tion. When a malfunction is detected, the “ABS” indica-
tor light is turned on and the anti-lock braking function is
disabled; but the standard power assisted brake sys-
tem continues to operate normally.
Refer to Section 5 of the Workshop Manual for further
anti-lock brake system (ABS) diagnosis.
ANTI-LOCK BRAKE SYSTEM (ABS)
44-4
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