Mazda 3 Service Manual: ABS HU/CM Inspection
1. Disconnect the ABS HU/CM connector..
2. Connect the negative battery cable..
3. Attach the tester lead to the ABS HU/CM wiring harness-side connector and inspect the voltage, continuity, or resistance according to the standard (reference value) in the table below.
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 |
|
|
C |
RR wheel-speed (-) |
RR ABS wheel-speed sensor |
Continuity |
C–RR ABS wheel-speed sensor connector terminal B |
Continuity detected |
|
|
D |
− |
− |
− |
− |
− |
− |
|
E |
RR wheel-speed (+) |
RR ABS wheel-speed sensor |
Continuity |
E–RR ABS wheel-speed sensor connector terminal A |
Continuity detected |
|
|
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 |
|
|
J |
− |
− |
− |
− |
− |
− |
|
K |
LF wheel-speed (-) |
ABS wheel-speed sensor (LF) |
Continuity |
K–LF ABS wheel-speed sensor connector terminal B |
Continuity detected |
|
|
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+ |
|
|
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 |
|
|
P |
− |
− |
− |
− |
− |
− |
|
Q |
RF wheel-speed (+) |
RF ABS wheel-speed sensor |
Continuity |
Q–RF ABS wheel-speed sensor terminal A |
Continuity detected |
|
|
R |
− |
− |
− |
− |
− |
− |
|
S |
− |
− |
− |
− |
− |
− |
|
T |
− |
− |
− |
− |
− |
− |
|
U |
LR wheel-speed (+) |
LR ABS wheel-speed sensor |
Continuity |
U–LR ABS wheel-speed sensor connector terminal A |
Continuity detected |
|
|
V |
− |
− |
− |
− |
− |
− |
|
W |
LR wheel-speed (-) |
LR ABS wheel-speed sensor |
Continuity |
W–LR ABS wheel-speed sensor connector terminal B |
Continuity detected |
|
|
X |
− |
− |
− |
− |
− |
− |
|
Y |
Power supply (Solenoid operation, ABS motor operation) |
Battery |
Voltage |
Under any condition |
B+ |
|
|
Z |
− |
− |
− |
− |
− |
− |
ABS
...
ABS HU/CM Removal/Installation
WARNING:
If the ABS HU/CM configuration is not completed, it could result in an unexpected
accident due to the ABS being inoperative. If the ABS HU/CM or ABS CM is replaced,
always use t ...
Other materials:
Map Light Bulb Removal/Installation
1. Disconnect the negative battery cable..
2. Insert a tape-wrapped fastener remover into the service hole and pry with
the screwdriver in the direction shown by the arrow to remove the lens.
3. Remove the map light bulb.
4. Install in the reverse order of removal. ...
General Procedures (Steering)
Wheel and Tire Installation
1. When installing the wheels and tires, tighten the wheel nuts in a criss-cross
pattern to the following tightening torque.
Tightening torque
88—118 N·m {9.0—12 kgf·m, 65—87 ft·lbf}
Connector Disconnection
1. Disconnect the negative battery cable ...
Splash Shield Removal/Installation
Front Splash Shield
1. Remove the bolts and fastener then remove the front splash shield.
2. Install in the reverse order of removal.
Rear Splash Shield
1. Remove the fastener, screws and capnut .
2. Pull the rear splash shield in the direction of the arrow shown in the figure,
the ...
