Mazda 3 Service Manual: ABS HU/CM Inspection

Terminal

Signal name

Connected to

Measured item

Measured terminal (measurement condition)

Standard

Inspection item(s)

A

−

−

−

−

−

−

B

Ground

Ground point

Continuity

B—ground point

Continuity detected

• Wiring harness (B—ground point)

C

RR wheel-speed (-)

RR ABS wheel-speed sensor

Continuity

C–RR ABS wheel-speed sensor connector terminal B

Continuity detected

• Wiring harness (C–RR ABS wheel-speed sensor connector terminal B)

D

−

−

−

−

−

−

E

RR wheel-speed (+)

RR ABS wheel-speed sensor

Continuity

E–RR ABS wheel-speed sensor connector terminal A

Continuity detected

• Wiring harness (E–RR ABS wheel-speed sensor connector terminal A)

F

−

−

−

−

−

−

G

−

−

−

−

−

−

H

CAN_H

DLC-2 (CAN_H)

This terminal is used for communication and cannot be used for malfunction determination during terminal voltage inspection.Perform a DTC inspection.

I

LF wheel-speed (+)

LF ABS wheel speed sensor

Continuity

I–LF ABS wheel-speed sensor connector terminal A

Continuity detected

• Wiring harness (I–LF ABS wheel-speed sensor connector terminal A)

J

−

−

−

−

−

−

K

LF wheel-speed (-)

ABS wheel-speed sensor (LF)

Continuity

K–LF ABS wheel-speed sensor connector terminal B

Continuity detected

• Wiring harness (K–LF ABS wheel-speed sensor connector terminal B)

L

CAN_L

DLC-2 (CAN_L)

This terminal is used for communication and cannot be used for malfunction determination during terminal voltage inspection.Perform a DTC inspection.

M

−

−

−

−

−

−

N

Power supply

(System)

Ignition switch or IG1 relay

Voltage

Switch the ignition to ON

B+

• Wiring harness (N—ignition switch or IG1 relay)

Switch the ignition to off

1 V or less

O

RF wheel-speed (-)

RF ABS wheel-speed sensor

Continuity

O–RF ABS wheel-speed sensor terminal B

Continuity detected

• Wiring harness (O–RF ABS wheel-speed sensor connector terminal B)

P

−

−

−

−

−

−

Q

RF wheel-speed (+)

RF ABS wheel-speed sensor

Continuity

Q–RF ABS wheel-speed sensor terminal A

Continuity detected

• Wiring harness (Q–RF ABS wheel-speed sensor connector terminal A)

R

−

−

−

−

−

−

S

−

−

−

−

−

−

T

−

−

−

−

−

−

U

LR wheel-speed (+)

LR ABS wheel-speed sensor

Continuity

U–LR ABS wheel-speed sensor connector terminal A

Continuity detected

• Wiring harness (U–LR ABS wheel-speed sensor connector terminal A)

V

−

−

−

−

−

−

W

LR wheel-speed (-)

LR ABS wheel-speed sensor

Continuity

W–LR ABS wheel-speed sensor connector terminal B

Continuity detected

• Wiring harness (W–LR ABS wheel-speed sensor connector terminal B)

X

−

−

−

−

−

−

Y

Power supply

(Solenoid operation, ABS motor operation)

Battery

Voltage

Under any condition

B+

• Wiring harness (Y–battery)

Z

−

−

−

−

−

−