Mazda 3 manuals

Mazda 3 Service Manual: DSC HU/CM Inspection

1. Disconnect the DSC HU/CM connector..

2. Connect the negative battery cable..

3. Attach the tester lead to the DSC HU/CM wiring harness-side connector and inspect voltage, continuity, or resistance according to the standard (reference) on the table.

Standard (Reference)



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

—

—

—

—

—

—

D

—

—

—

—

—

—

E

—

—

—

—

—

—

F

LF wheel-speed sensor (-)

LF wheel-speed sensor

Continuity

F—LF ABS wheel-speed sensor terminal B

Continuity detected

  • Wiring harness (F—LF ABS wheel-speed sensor terminal B)

G

—

—

—

—

—

—

H

—

—

—

—

—

—

I

LF wheel-speed sensor (+)

LF ABS wheel-speed sensor

Continuity

I—LF ABS wheel-speed sensor terminal A

Continuity detected

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

J

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.

K

—

—

—

—

—

—

L

—

—

—

—

—

—

M

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.

N

—

—

—

—

—

—

O

RR wheel-speed (+)

RR ABS wheel-speed sensor

Continuity

O—RR ABS wheel-speed sensor terminal A

Continuity detected

  • Wiring harness (O—RR ABS wheel-speed sensor terminal A)

P

—

—

—

—

—

—

Q

—

—

—

—

—

—

R

RR wheel-speed (-)

RR ABS wheel-speed sensor

Continuity

R—RR ABS wheel-speed sensor terminal B

Continuity detected

  • Wiring harness (R—RR ABS wheel-speed sensor terminal B)

S

—

—

—

—

—

—

T

—

—

—

—

—

—

U

—

—

—

—

—

—

V

—

—

—

—

—

—

W

—

—

—

—

—

—

X

—

—

—

—

—

—

Y

Power supply (system)

Ignition switch or IG1 relay

Voltage

Switch the ignition to ON.

B+

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

Switch the ignition to off.

1 V or less

Z

—

—

—

—

—

—

AA

—

—

—

—

—

—

AB

—

—

—

—

—

—

AC

—

—

—

—

—

—

AD

—

—

—

—

—

—

AE

—

—

—

—

—

—

AF

—

—

—

—

—

—

AG

LR wheel-speed (-)

LR wheel-speed sensor

Continuity

AG—LR ABS wheel-speed sensor terminal B

Continuity detected

  • Wiring harness (AG—LR ABS wheel-speed sensor terminal B)

AH

—

—

—

—

—

—

AI

—

—

—

—

—

—

AJ

LR wheel-speed (+)

LR ABS wheel-speed sensor

Continuity

AJ—LR ABS wheel-speed sensor terminal A

Continuity detected

  • Wiring harness (AJ—LR ABS wheel-speed sensor terminal A)

AK

DSC OFF switch

DSC OFF switch

Continuity

AK—DSC OFF switch terminal B

Continuity detected

  • Wiring harness (AK—DSC OFF switch terminal B)

AL

CAN2_L

SAS control module

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

AM

—

—

—

—

—

—

AN

—

—

—

—

—

—

AO

CAN2_H

SAS control module

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

AP

RF wheel-speed (+)

RF ABS wheel-speed sensor

Continuity

AP—RF ABS wheel-speed sensor terminal A

Continuity detected

  • Wiring harness (AP—RF ABS wheel-speed sensor terminal A)

AQ

—

—

—

—

—

—

AR

—

—

—

—

—

—

AS

RF wheel-speed (-)

RF ABS wheel-speed sensor

Continuity

AS—RF ABS wheel-speed sensor terminal B

Continuity detected

  • Wiring harness (AS—RF ABS wheel-speed sensor terminal B)

AT

Power supply

(ABS motor operation)

Battery

Voltage

Under any condition

B+

  • Wiring harness

    (AT—battery)

AU

Power supply

(solenoid operation)

Battery

Voltage

Under any condition

B+

  • Wiring harness

    (AU—battery)


Brake Control, Vehicle Dynamics
...

DSC HU/CM Removal/Installation
WARNING: If the DSC HU/CM configuration is not completed, it could result in an unexpected accident due to the DSC being inoperative. If the DSC HU/CM is replaced, always use the automat ...

Other materials:

Combination Switch Disassembly/Assembly
CAUTION: Handling the air bag module improperly can accidentally deploy the air bag module, which may seriously injure you. Read the air bag system service warnings and cautions before handling the air bag module.. 1. Switch the ignition to off. 2. Disconnect the negative batte ...

Operating the Passenger Power Windows
To open the window to the desired position, hold down the switch. To close the window to the desired position, pull up the switch. NOTE The power windows may be operated when the power window lock switch on the driver's door is in the unlocked position. The passenger windows ma ...

Cell Phones
WARNING Please comply with the legal regulations concerning the use of communication equipment in vehicles in your country: Use of any electrical devices such as cell phones, computers, portable radios, vehicle navigation or other devices by the driver while the vehicle is ...

© 2016-2022 Copyright www.mazda3tech.com