Mazda MX-6 1998, Workshop Manual, Page: 668 / 1282

ANTILOCK BRAKE SYSTEM
ABS HARNESS AND INPUT SIGNAL INSPECTION
W 6 U 4 1 3 W 0 3
1. Disconnect the ABS CM connector with the ignition switch at OFF.
Caution
• Be careful not to damage the terminals during inspection.
2. Insert a thin isolation plate to the short bar of the connector.
3. Attach a wire to the tester lead to avoid damaging the terminals then inspect voltage, resistance or continuity,
referring to the table below.
r
AE AD AC AB AA
' D
7 7 7 *
/ A
/
K J I
H G F E
/ s / r / s / /
Z Y X
v ------- -------- --------
W V U T S R Q p 0 N M
I
— y
W 6 U 4 1 3 W A 9
Terminal Signal name Connected to Item
Condition
Specifica­
tion
Possible cause
A
System ground
(ABS motor)
Ground point
Continuity
A— ground point
(IG SW is at OFF)
Yes
• Harness to ground
point
B
Power supply
(ABS motor)
Fuse (60 A)
Voltage B— A B+
• Fuse (60 A)
• Harness (B— fuse
(60 A))
C
Power supply
(solenoid valve)
Fuse (20 A)
Voltage
C— D B+
• Fuse (20 A)
•
Harness (C— fuse
(20 A))
D
System ground
(signal)
Ground point
Continuity
D— ground point
(IG SW is at OFF)
Yes
• Harness to ground
point
E*3
TCS OFF light TCS OFF light Voltage
E— D
(IG SW is at ON)
B + '1
• Harness
(E— meter— IG
SW)
F ABS warning light ABS warning light Voltage
F— D
(IG SW is at ON)
B+*1
• Harness
(F— meter— IG
SW)
L
M (N)*2
RR wheel speed
RR wheel-speed
sensor
Voltage
M (N)*2— L
vehicle is stopped
0 V (AC)
• Harness
(Sensor— ABS
CM harness
connector)
• Sensor,
Installation
condition
M (N)*2— L
when RR wheel
turned 1 revolution
per second 0.23 V min.
(AC)
Resistance M (N)*2— L
1.28— 1.92
k ß
O
P
RF wheel speed
RF wheel-speed
sensor
Voltage
P— 0
vehicle is stopped
0 V (AC)
• Harness
(Sensor— ABS
CM harness
connector)
• Sensor,
Installation
condition
P— 0
when RF wheel
turned 1 revolution
per second 0.23 V min.
(AC)
Resistance P— 0
1.28— 1.92
ki2
Q
R
LF wheel speed
LF wheel-speed
sensor
Voltage
R— Q
vehicle is stopped
0 V (AC)
• Harness
(Sensor— ABS
CM harness
connector)
• Sensor,
Installation
condition
R— Q
when LF wheel
turned 1 revolution
per second
0.23 V min.
(AC)
Resistance R— Q
1.28-1.92
kQ
0 4 -1 3 -4