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

Standard (Reference Value)

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Terminal

Signal name

Connected to

Measured item

Measured terminal (measured condition)

Standard

Inspection item(s)

A

Ground

(ABS motor)

Ground point

Continuity

A—ground point

Continuity detected

•  Wiring harness (A—ground point)

B

Power supply

(ABS motor operation)

Battery

Voltage

Under any condition

B+

•  Wiring harness (B—battery)

C

Power supply

(solenoid)

Battery

Voltage

Under any condition

B+

•  Wiring harness (C―battery)

D

Ground

(ABS system)

Ground point

Continuity

D—ground point

Continuity detected

•  Wiring harness (D—ground point)

E

LF wheel-speed sensor (signal)

LF ABS wheel-speed sensor

Continuity

E—LF ABS wheel-speed sensor connector terminal A

Continuity detected

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

F

LF wheel-speed sensor (ground)

LF ABS wheel-speed sensor

Continuity

F—LF ABS wheel-speed sensor connector terminal B

Continuity detected

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

G

LR wheel-speed sensor (ground)

LR ABS wheel-speed sensor

Continuity

G—LR ABS wheel-speed sensor connector terminal B

Continuity detected

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

H

—

—

—

—

—

—

I

LR wheel-speed sensor (signal)

LR ABS wheel-speed sensor

Continuity

I—LR ABS wheel-speed sensor connector terminal A

Continuity detected

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

J

Power supply

(system)

Ignition switch or engine switch

Voltage

Ignition switch or engine switch at ON

B+

•  Wiring harness (J—ignition switch or engine switch)

Ignition switch or engine switch is off.

1 V or less

—

K

RR wheel-speed sensor (ground)

RR ABS wheel-speed sensor

Continuity

K—RR ABS wheel-speed sensor connector terminal B

Continuity detected

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

L

RR wheel-speed sensor (signal)

RR ABS wheel-speed sensor

Continuity

L—RR ABS wheel-speed sensor connector terminal A

Continuity detected

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

M

RF wheel-speed sensor (ground)

RF ABS wheel-speed sensor

Continuity

M—RF ABS wheel-speed sensor connector terminal B

Continuity detected

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

N

Brake switch

Brake switch

Voltage

N—brake switch

(Brake pedal depressed)

B+

•  Wiring harness (N—brake switch)

•  Brake switch

Y—brake switch

(Brake pedal not depressed)

1 V or less

O

RF wheel-speed sensor (signal)

RF ABS wheel-speed sensor

Continuity

O—RF ABS wheel-speed sensor connector terminal A

Continuity detected

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

P^*

G sensor (signal)

G sensor

Continuity

P—G sensor connector terminal B

Continuity detected

•  Wiring harness (P—G sensor connector terminal B)

Q

On-board diagnostic

KLN terminal of DLC-2

Continuity

Q—DLC-2 connector terminal KLN

Continuity detected

•  Wiring harness (Q—DLC-2 connector terminal KLN)

R

—

—

—

—

—

—

S

—

—

—

—

—

—

T

—

—

—

—

—

—

U

—

—

—

—

—

—

V^*

G sensor (power supply

G sensor

Continuity

V—G sensor connector terminal A

Continuity detected

•  Wiring harness (V—G sensor connector terminal A)

W^*

G sensor (ground)

G sensor

Continuity

W—G sensor connector terminal C

—

•  Wiring harness (W—G sensor connector terminal C)

X

—

—

—

—

—

—

Y

—

—

—

—

—

—

Z

—

—

—

—

—

—

Terminal	Signal name	Connected to	Measured item	Measured terminal (measured condition)	Standard	Inspection item(s)
A	Ground (ABS motor)	Ground point	Continuity	A—ground point	Continuity detected	• Wiring harness (A—ground point)
B	Power supply (ABS motor operation)	Battery	Voltage	Under any condition	B+	• Wiring harness (B—battery)
C	Power supply (solenoid)	Battery	Voltage	Under any condition	B+	• Wiring harness (C―battery)
D	Ground (ABS system)	Ground point	Continuity	D—ground point	Continuity detected	• Wiring harness (D—ground point)
E	LF wheel-speed sensor (signal)	LF ABS wheel-speed sensor	Continuity	E—LF ABS wheel-speed sensor connector terminal A	Continuity detected	• Wiring harness (E—LF ABS wheel-speed sensor connector terminal A)
F	LF wheel-speed sensor (ground)	LF ABS wheel-speed sensor	Continuity	F—LF ABS wheel-speed sensor connector terminal B	Continuity detected	• Wiring harness (F—LF ABS wheel-speed sensor connector terminal B)
G	LR wheel-speed sensor (ground)	LR ABS wheel-speed sensor	Continuity	G—LR ABS wheel-speed sensor connector terminal B	Continuity detected	• Wiring harness (G—LR ABS wheel-speed sensor connector terminal B)
H	—	—	—	—	—	—
I	LR wheel-speed sensor (signal)	LR ABS wheel-speed sensor	Continuity	I—LR ABS wheel-speed sensor connector terminal A	Continuity detected	• Wiring harness (I—LR ABS wheel-speed sensor connector terminal A)
J	Power supply (system)	Ignition switch or engine switch	Voltage	Ignition switch or engine switch at ON	B+	• Wiring harness (J—ignition switch or engine switch)
Ignition switch or engine switch is off.	1 V or less	—
K	RR wheel-speed sensor (ground)	RR ABS wheel-speed sensor	Continuity	K—RR ABS wheel-speed sensor connector terminal B	Continuity detected	• Wiring harness (K—RR ABS wheel-speed sensor connector terminal B)
L	RR wheel-speed sensor (signal)	RR ABS wheel-speed sensor	Continuity	L—RR ABS wheel-speed sensor connector terminal A	Continuity detected	• Wiring harness (L—RR ABS wheel-speed sensor connector terminal A)
M	RF wheel-speed sensor (ground)	RF ABS wheel-speed sensor	Continuity	M—RF ABS wheel-speed sensor connector terminal B	Continuity detected	• Wiring harness (M—RF ABS wheel-speed sensor connector terminal B)
N	Brake switch	Brake switch	Voltage	N—brake switch (Brake pedal depressed)	B+	• Wiring harness (N—brake switch) • Brake switch
Y—brake switch (Brake pedal not depressed)	1 V or less
O	RF wheel-speed sensor (signal)	RF ABS wheel-speed sensor	Continuity	O—RF ABS wheel-speed sensor connector terminal A	Continuity detected	• Wiring harness (O—RF ABS wheel-speed sensor connector terminal A)
P^*	G sensor (signal)	G sensor	Continuity	P—G sensor connector terminal B	Continuity detected	• Wiring harness (P—G sensor connector terminal B)
Q	On-board diagnostic	KLN terminal of DLC-2	Continuity	Q—DLC-2 connector terminal KLN	Continuity detected	• Wiring harness (Q—DLC-2 connector terminal KLN)
R	—	—	—	—	—	—
S	—	—	—	—	—	—
T	—	—	—	—	—	—
U	—	—	—	—	—	—
V^*	G sensor (power supply	G sensor	Continuity	V—G sensor connector terminal A	Continuity detected	• Wiring harness (V—G sensor connector terminal A)
W^*	G sensor (ground)	G sensor	Continuity	W—G sensor connector terminal C	—	• Wiring harness (W—G sensor connector terminal C)
X	—	—	—	—	—	—
Y	—	—	—	—	—	—
Z	—	—	—	—	—	—

* :4x2 (high clearance model), 4x4