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 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:
Steering Gear And Linkage Assembly
CAUTION:
To prevent damage to the steering gear, secure it to the vise using a copper
plate or clean cloth.
1. Assemble in the order indicated in the table.
1
Gear housing
2
Mounting rubber
(See Mounting Rubber Assembly No ...
Vanity Mirror Illumination Inspection
1. Disconnect the negative battery cable..
2. Remove the sunvisor..
3. Verify that the continuity between the vanity mirror illumination terminals
is as indicated in the table.
If not as indicated in the table, inspect the bulb. If there is no malfunction,
replace the sunvisor.
...
Operating Tips for Audio System
WARNING
Always adjust the audio while the
vehicle is stopped:
Do not adjust the audio control
switches while driving the vehicle.
Adjusting the audio while driving
the vehicle is dangerous as it could
distract your attention from the vehicle
operation which could lead ...
