ABS HU/CM INSPECTION[L3]

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1. Disconnect the ABS HU/CM connectors.

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 value) on the table.

Terminal Voltage Table (Reference)

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Terminal

Signal name

Connected to

Measured item

Measured terminal (measurement condition)

Standard

Inspection item(s)

A

Ground (system)

Ground point

Continuity

A—ground point

Continuity detected

•  Wiring harness (A—ground point)

B

Ground (ABS motor)

Ground point

Continuity

B—ground point

Continuity detected

•  Wiring harness (B—ground point)

C

-

-

-

-

-

-

D

CAN_L

DLC-2

(CAN_L)

Continuity

D—DLC-2 terminal CAN_L

Continuity detected

•  D—DLC-2 terminal CAN_L

E

-

-

-

-

-

-

F

LF wheel-speed sensor (ground)

LF wheel-speed sensor

Continuity

F—LF ABS wheel-speed sensor connector terminal A

Continuity detected

•  Wiring harness (F—LF ABS wheel-speed sensor terminal A)

G

-

-

-

-

-

-

H

-

-

-

-

-

-

I

LF wheel-speed sensor (single)

ABS wheel-speed sensor (LF)

Continuity

I—LF ABS wheel-speed sensor connector terminal A

Continuity detected

•  Wiring harness (I—LF ABS wheel-speed sensor connector terminal A)

J

-

-

-

-

-

-

K

-

-

-

-

-

-

L

-

-

-

-

-

-

M

-

-

-

-

-

-

N

RR wheel-speed (signal)

ABS wheel-speed sensor (RR)

Continuity

O—RR ABS wheel-speed sensor connector terminal A

Continuity detected

•  Wiring harness (N—RR ABS wheel-speed sensor connector terminal A)

O

-

-

-

-

-

-

P

CAN_H

DLC-2

(CAN_H)

Continuity

P—DLC-2 terminal CAN_H

Continuity detected

•  Wiring harness (P—DLC-2 terminal CAN_H)

Q

RR wheel-speed (ground)

ABS wheel-speed sensor (RR)

Continuity

C—RR ABS wheel-speed sensor connector terminal B

Continuity detected

•  Wiring harness (C—RR ABS wheel-speed sensor connector terminal B)

R

-

-

-

-

-

-

S

-

-

-

-

-

-

T

Brake switch

Brake switch

Voltage

T—ground point

(Brake pedal depressed with ignition switch at ON)

B+

•  Wiring harness (T—brake switch)

•  Brake switch

T—ground point

(Brake pedal not depressed with ignition switch at ON)

1 V or less

U

-

-

-

-

-

-

V

-

-

-

-

-

-

W

-

-

-

-

-

-

X

-

-

-

-

-

-

Y

-

-

-

-

-

-

Z

-

-

-

-

-

-

AA

-

-

-

-

-

-

AB

-

-

-

-

-

-

AC

-

-

-

-

-

-

AD

-

-

-

-

-

-

AE

-

-

-

-

-

-

AF

LR wheel-speed (signal)

ABS wheel-speed sensor (LR)

Continuity

AF—LR ABS wheel-speed sensor connector terminal A

Continuity detected

•  Wiring harness (AF—LR ABS wheel-speed sensor connector terminal A)

AG

-

-

-

-

-

-

AH

-

-

-

-

-

-

AI

LR wheel-speed (ground)

ABS wheel-speed sensor (LR)

Continuity

AI—LR ABS wheel-speed sensor connector terminal B

Continuity detected

•  Wiring harness (AI—LR ABS wheel-speed sensor connector terminal B)

AJ

-

-

-

-

-

-

AK

Power supply (system)

Ignition switch

Voltage

Ignition switch on

B+

•  Wiring harness (AK—ignition switch)

Ignition switch off

1 V or less

-

AL

-

-

-

-

-

-

AM

-

-

-

-

-

-

AN

-

-

-

-

-

-

AO

RF wheel-speed (signal)

ABS wheel-speed sensor (RF)

Continuity

AO—RF ABS wheel-speed sensor connector terminal A

Continuity detected

•  Wiring harness (AO—RF ABS wheel-speed sensor connector terminal A)

AP

-

-

-

-

-

-

AQ

KLN

DLC-2

(KLN)

Continuity

AQ—DLC-2 terminal KLN

Continuity detected

•  AQ—DLC-2 terminal KLN

AR

RF wheel-speed (ground)

ABS wheel-speed sensor (RF)

Continuity

AR—RF ABS wheel-speed sensor connector terminal B

Continuity detected

•  Wiring harness (AR—RF ABS wheel-speed sensor connector terminal B)

AS

-

-

-

-

-

-

AT

Power supply

(ABS motor operation)

Battery

Voltage

Under any condition

B+

•  Wiring harness (AT—battery)

AU

Power supply

(solenoid operation)

Battery

Voltage

Under any condition

B+

•  Wiring harness (AU—battery)

Terminal	Signal name	Connected to	Measured item	Measured terminal (measurement condition)	Standard	Inspection item(s)
A	Ground (system)	Ground point	Continuity	A—ground point	Continuity detected	• Wiring harness (A—ground point)
B	Ground (ABS motor)	Ground point	Continuity	B—ground point	Continuity detected	• Wiring harness (B—ground point)
C	-	-	-	-	-	-
D	CAN_L	DLC-2 (CAN_L)	Continuity	D—DLC-2 terminal CAN_L	Continuity detected	• D—DLC-2 terminal CAN_L
E	-	-	-	-	-	-
F	LF wheel-speed sensor (ground)	LF wheel-speed sensor	Continuity	F—LF ABS wheel-speed sensor connector terminal A	Continuity detected	• Wiring harness (F—LF ABS wheel-speed sensor terminal A)
G	-	-	-	-	-	-
H	-	-	-	-	-	-
I	LF wheel-speed sensor (single)	ABS wheel-speed sensor (LF)	Continuity	I—LF ABS wheel-speed sensor connector terminal A	Continuity detected	• Wiring harness (I—LF ABS wheel-speed sensor connector terminal A)
J	-	-	-	-	-	-
K	-	-	-	-	-	-
L	-	-	-	-	-	-
M	-	-	-	-	-	-
N	RR wheel-speed (signal)	ABS wheel-speed sensor (RR)	Continuity	O—RR ABS wheel-speed sensor connector terminal A	Continuity detected	• Wiring harness (N—RR ABS wheel-speed sensor connector terminal A)
O	-	-	-	-	-	-
P	CAN_H	DLC-2 (CAN_H)	Continuity	P—DLC-2 terminal CAN_H	Continuity detected	• Wiring harness (P—DLC-2 terminal CAN_H)
Q	RR wheel-speed (ground)	ABS wheel-speed sensor (RR)	Continuity	C—RR ABS wheel-speed sensor connector terminal B	Continuity detected	• Wiring harness (C—RR ABS wheel-speed sensor connector terminal B)
R	-	-	-	-	-	-
S	-	-	-	-	-	-
T	Brake switch	Brake switch	Voltage	T—ground point (Brake pedal depressed with ignition switch at ON)	B+	• Wiring harness (T—brake switch) • Brake switch
T	Brake switch	Brake switch	Voltage	T—ground point (Brake pedal not depressed with ignition switch at ON)	1 V or less	• Wiring harness (T—brake switch) • Brake switch
U	-	-	-	-	-	-
V	-	-	-	-	-	-
W	-	-	-	-	-	-
X	-	-	-	-	-	-
Y	-	-	-	-	-	-
Z	-	-	-	-	-	-
AA	-	-	-	-	-	-
AB	-	-	-	-	-	-
AC	-	-	-	-	-	-
AD	-	-	-	-	-	-
AE	-	-	-	-	-	-
AF	LR wheel-speed (signal)	ABS wheel-speed sensor (LR)	Continuity	AF—LR ABS wheel-speed sensor connector terminal A	Continuity detected	• Wiring harness (AF—LR ABS wheel-speed sensor connector terminal A)
AG	-	-	-	-	-	-
AH	-	-	-	-	-	-
AI	LR wheel-speed (ground)	ABS wheel-speed sensor (LR)	Continuity	AI—LR ABS wheel-speed sensor connector terminal B	Continuity detected	• Wiring harness (AI—LR ABS wheel-speed sensor connector terminal B)
AJ	-	-	-	-	-	-
AK	Power supply (system)	Ignition switch	Voltage	Ignition switch on	B+	• Wiring harness (AK—ignition switch)
AK	Power supply (system)	Ignition switch	Voltage	Ignition switch off	1 V or less	-
AL	-	-	-	-	-	-
AM	-	-	-	-	-	-
AN	-	-	-	-	-	-
AO	RF wheel-speed (signal)	ABS wheel-speed sensor (RF)	Continuity	AO—RF ABS wheel-speed sensor connector terminal A	Continuity detected	• Wiring harness (AO—RF ABS wheel-speed sensor connector terminal A)
AP	-	-	-	-	-	-
AQ	KLN	DLC-2 (KLN)	Continuity	AQ—DLC-2 terminal KLN	Continuity detected	• AQ—DLC-2 terminal KLN
AR	RF wheel-speed (ground)	ABS wheel-speed sensor (RF)	Continuity	AR—RF ABS wheel-speed sensor connector terminal B	Continuity detected	• Wiring harness (AR—RF ABS wheel-speed sensor connector terminal B)
AS	-	-	-	-	-	-
AT	Power supply (ABS motor operation)	Battery	Voltage	Under any condition	B+	• Wiring harness (AT—battery)
AU	Power supply (solenoid operation)	Battery	Voltage	Under any condition	B+	• Wiring harness (AU—battery)