ABS HU/CM INSPECTION


id041300801000

1. Remove the battery and battery tray.

2. Disconnect the HU/CM connector.

3. Install the battery.

4. Attach the tester lead to the ABS HU/CM harness side connector, then inspect voltage, continuity or resistance according to the table.

Standard (reference value)

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 C
Continuity detected
• Wiring harness (C-RR ABS wheel-speed sensor terminal C)
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 B
Continuity detected
• Wiring harness (I-LF ABS wheel-speed sensor terminal B)
J
-
-
-
-
-
-
K
LF wheel-speed
(ground)
LF ABS wheel-speed sensor
Continuity
K-LF ABS wheel-speed sensor terminal A
Continuity detected
• Wiring harness (K-LF ABS wheel-speed sensor terminal A)
L
CAN_L
DLC-2
(CAN_L)
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 A
Continuity detected
• Wiring harness (O-RF ABS wheel-speed sensor terminal A)
P
-
-
-
-
-
-
Q
RF wheel-speed
(signal)
RF ABS wheel-speed sensor
Continuity
Q-RF ABS wheel-speed sensor terminal B
Continuity detected
• Wiring harness (Q-RF ABS wheel-speed sensor terminal B)
R
KLN
DLC-2 (KLN)
Continuity
R-DLC-2 terminal KLN
Continuity detected
• Wiring harness (R-DLC-2 terminal KLN)
S
-
-
-
-
-
-
T
-
-
-
-
-
-
U
LR wheel-speed
(signal)
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)
V
Brake switch
Brake switch
Voltage
V-Ground point
(When depressing the brake pedal with IG SW at the ON position)
VB
• Wiring harness (V-brake switch)
• Brake switch
V-Ground point
(When releasing the brake pedal with IG SW at the ON position)
1V or less
W
LR wheel-speed
(ground)
LR ABS wheel-speed sensor
Continuity
W-LR ABS wheel-speed sensor terminal D
Continuity detected
• Wiring harness (W-LR ABS wheel-speed sensor terminal D)
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)