ABS HU/CM INSPECTION


id041300801000

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, then inspect the voltage, continuity, or resistance according to the standard (reference) on the table.

Terminal Voltage Table (Reference)

Terminal

Signal name

Connected to

Measured item

Measured terminal (measurement condition)

Standard

Inspection item(s)

A
-
-
-
-
-
-
B
Ground
(ABS motor)
Ground point
Continuity
B-ground point
Continuity detected
• Wiring harness
(B-ground point)
C
RR wheel-speed
(ground)
RR ABS wheel-speed sensor
Continuity
C-RR ABS wheel-speed sensor terminal B
Continuity detected
• Wiring harness (C-RR ABS wheel-speed sensor terminal B)
D
-
-
-
-
-
-
E
RR wheel-speed
(signal)
RR ABS wheel-speed sensor
Continuity
E-RR ABS wheel-speed sensor terminal A
Continuity detected
• Wiring harness (E-RR ABS wheel-speed sensor terminal A)
F
-
-
-
-
-
-
G
-
-
-
-
-
-
H
CAN_H
DLC-2
(CAN_H)
Continuity
H-DLC-2 terminal CAN_H
Continuity detected
• Wiring harness (H-DLC-2 terminal CAN_H)
I
LF wheel-speed
(signal)
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
-
-
-
-
-
-
K
LF wheel-speed
(ground)
LF ABS wheel-speed sensor
Continuity
K-LF ABS wheel-speed sensor terminal B
Continuity detected
• Wiring harness (K-LF ABS wheel-speed sensor terminal B)
L
CAN_L
DLC-2
(CAN_H)
Continuity
L-DLC-2 terminal CAN_L
Continuity detected
• Wiring harness (L-DLC-2 terminal CAN_L)
M
-
-
-
-
-
-
N
Power supply
(system)
Ignition switch
Voltage
The ignition switch is at the ON position.
B+
• Wiring harness
(N-ignition switch)
The ignition switch is off.
1 V or less
-
O
RF wheel-speed
(ground)
RF ABS wheel-speed sensor
Continuity
O-RF ABS wheel-speed sensor terminal B
Continuity detected
• Wiring harness (O-RF ABS wheel-speed sensor terminal B)
P
-
-
-
-
-
-
Q
RF wheel-speed
(signal)
RF ABS wheel-speed sensor
Continuity
Q-RF ABS wheel-speed sensor terminal A
Continuity detected
• Wiring harness (Q-RF ABS wheel-speed sensor terminal A)
R
-
-
-
-
-
-
S
-
-
-
-
-
-
T
-
-
-
-
-
-
U
LR wheel-speed
(signal)
LR ABS wheel-speed sensor
Continuity
U-LR ABS wheel-speed sensor terminal A
Continuity detected
• Wiring harness (U-LR ABS wheel-speed sensor terminal A)
V
-
-
-
-
-
-
W
LR wheel-speed
(ground)
LR ABS wheel-speed sensor
Continuity
U-LR ABS wheel-speed sensor terminal B
Continuity detected
• Wiring harness (U-LR ABS wheel-speed sensor terminal B)
X
-
-
-
-
-
-
Y
Power supply
(solenoid operation)
Battery
Voltage
Under any condition
B+
• Wiring harness
(Y-battery)
Z
Power supply
(ABS motor operation)
Battery
Voltage
Under any condition
B+
• Wiring harness
(Z-battery)