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 ...
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Specification
Spark plug type
LFJD-18110, L3Y2-18110
Plug Gap Inspection
CAUTION:
To avoid possible damage to the tip, do not adjust the spark plug gap. (L3Y2-18110)
To prevent damaging the tip, use a wire type plug gap gauge when inspecting
the spark plug gap. (L3 ...
Washer Fluid Level Sensor Inspection
1. Disconnect the negative battery cable..
2. Remove the front bumper..
3. Verify that continuity between the washer fluid-level sensor terminals is
as indicated in the table.
If not as specified, replace the washer fluid-level sensor.
...
Front Bumper Disassembly/Assembly
Standard Type
Except SKYACTIV-G 2.0
1. Disassemble in the order indicated in the table.
1
Screw A
2
Guard cover
3
Screw B
4
Fastener C
5
Intake air guide
...
