DSC HU/CM INSPECTION

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1. Disconnect the DSC HU/CM connector. (See DSC HU/CM REMOVAL/INSTALLATION [L.H.D.].)(See DSC HU/CM REMOVAL/INSTALLATION [R.H.D.].)

2. Connect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [L3 Turbo].)

3. Attach the tester lead to the DSC 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 operation)

Battery

Voltage

Under any condition

B+

•  Wiring harness (C—battery)

D

Ground

(DSC 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 B

Continuity detected

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

F

LF wheel-speed sensor (power supply)

LF ABS wheel-speed sensor

Continuity

F—LF ABS wheel-speed sensor connector terminal A

Continuity detected

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

G

LR wheel-speed sensor (power supply)

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

LR wheel-speed sensor (signal)

LR ABS wheel-speed sensor

Continuity

H—LR ABS wheel-speed sensor connector terminal A

Continuity detected

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

I

RR wheel-speed sensor (power supply)

RR ABS wheel-speed sensor

Continuity

I—RR ABS wheel-speed sensor connector terminal B

Continuity detected

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

J

Power supply

(system)

Ignition switch

Voltage

Ignition switch at ON

B+

•  Wiring harness (J—ignition switch)

Ignition switch is off.

1 V or less

—

K

—

—

—

—

—

—

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 (power supply)

RF ABS wheel-speed sensor

Continuity

M—RF ABS wheel-speed sensor connector terminal A

Continuity detected

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

N

Brake switch

Brake switch

Voltage

N—ground point

(Brake pedal

depressed)

B+

•  Wiring harness (N—brake switch)

•  Brake switch

N—ground point

(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 B

Continuity detected

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

P

TCS OFF switch

TCS OFF switch

Continuity

P—TCS OFF switch connector terminal A

Continuity detected

•  Wiring harness (P—TCS OFF switch connector terminal A)

Q

—

—

—

—

—

—

R

—

—

—

—

—

—

S

—

—

—

—

—

—

T

—

—

—

—

—

—

U

—

—

—

—

—

—

V

—

—

—

—

—

—

W

CAN_L

DLC-2 (CAN_L)

Continuity

W—DLC-2 terminal CAN_L

Continuity detected

•  Wiring harness (W—DLC-2 terminal CAN_L)

X

CAN_H

DLC-2 (CAN_H)

Continuity

X—DLC-2 terminal CAN_H

Continuity detected

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

Y

Ground (combined sensor)

Combined sensor

Continuity

Y—combined sensor connector terminal F

Continuity detected

•  Wiring harness (Y—combined sensor connector terminal F)

Z

—

—

—

—

—

—

AA

Yaw rate

(signal)

Combined sensor

Continuity

AA—combined sensor connector terminal B

Continuity detected

•  Wiring harness (AA—combined sensor connector terminal B)

AB

Yaw rate (test signal)

Combined sensor

Continuity

AB—combined sensor connector terminal C

Continuity detected

•  Wiring harness (AB—combined sensor connector terminal C)

AC

—

—

—

—

—

—

AD

—

—

—

—

—

—

AE

Yaw rate (reference signal)

Combined sensor

Continuity

AE—combined sensor connector terminal A

Continuity detected

•  Wiring harness (AE—combined sensor connector terminal A)

AF

—

—

—

—

—

—

AG

—

—

—

—

—

—

AH

—

—

—

—

—

—

AI

Lateral-G (signal)

Combined sensor

Continuity

AI—combined sensor connector terminal D

Continuity detected

•  Wiring harness (AI—combined sensor connector terminal D)

AJ

—

—

—

—

—

—

AK

—

—

—

—

—

—

AL

—

—

—

—

—

—

AM

—

—

—

—

—

—

AN

—

—

—

—

—

—

AO

—

—

—

—

—

—

AP

—

—

—

—

—

—

AQ

—

—

—

—

—

—

AR

—

—

—

—

—

—

AS

—

—

—

—

—

—

AT

—

—

—

—

—

—

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 operation)	Battery	Voltage	Under any condition	B+	• Wiring harness (C—battery)
D	Ground (DSC 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 B	Continuity detected	• Wiring harness (E—LF ABS wheel-speed sensor connector terminal B)
F	LF wheel-speed sensor (power supply)	LF ABS wheel-speed sensor	Continuity	F—LF ABS wheel-speed sensor connector terminal A	Continuity detected	• Wiring harness (F—LF ABS wheel-speed sensor connector terminal A)
G	LR wheel-speed sensor (power supply)	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	LR wheel-speed sensor (signal)	LR ABS wheel-speed sensor	Continuity	H—LR ABS wheel-speed sensor connector terminal A	Continuity detected	• Wiring harness (H—LR ABS wheel-speed sensor connector terminal A)
I	RR wheel-speed sensor (power supply)	RR ABS wheel-speed sensor	Continuity	I—RR ABS wheel-speed sensor connector terminal B	Continuity detected	• Wiring harness (I—RR ABS wheel-speed sensor connector terminal B)
J	Power supply (system)	Ignition switch	Voltage	Ignition switch at ON	B+	• Wiring harness (J—ignition switch)
J	Power supply (system)	Ignition switch	Voltage	Ignition switch is off.	1 V or less	—
K	—	—	—	—	—	—
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 (power supply)	RF ABS wheel-speed sensor	Continuity	M—RF ABS wheel-speed sensor connector terminal A	Continuity detected	• Wiring harness (M—RF ABS wheel-speed sensor connector terminal A)
N	Brake switch	Brake switch	Voltage	N—ground point (Brake pedal depressed)	B+	• Wiring harness (N—brake switch) • Brake switch
N	Brake switch	Brake switch	Voltage	N—ground point (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 B	Continuity detected	• Wiring harness (O—RF ABS wheel-speed sensor connector terminal B)
P	TCS OFF switch	TCS OFF switch	Continuity	P—TCS OFF switch connector terminal A	Continuity detected	• Wiring harness (P—TCS OFF switch connector terminal A)
Q	—	—	—	—	—	—
R	—	—	—	—	—	—
S	—	—	—	—	—	—
T	—	—	—	—	—	—
U	—	—	—	—	—	—
V	—	—	—	—	—	—
W	CAN_L	DLC-2 (CAN_L)	Continuity	W—DLC-2 terminal CAN_L	Continuity detected	• Wiring harness (W—DLC-2 terminal CAN_L)
X	CAN_H	DLC-2 (CAN_H)	Continuity	X—DLC-2 terminal CAN_H	Continuity detected	• Wiring harness (X—DLC-2 terminal CAN_H)
Y	Ground (combined sensor)	Combined sensor	Continuity	Y—combined sensor connector terminal F	Continuity detected	• Wiring harness (Y—combined sensor connector terminal F)
Z	—	—	—	—	—	—
AA	Yaw rate (signal)	Combined sensor	Continuity	AA—combined sensor connector terminal B	Continuity detected	• Wiring harness (AA—combined sensor connector terminal B)
AB	Yaw rate (test signal)	Combined sensor	Continuity	AB—combined sensor connector terminal C	Continuity detected	• Wiring harness (AB—combined sensor connector terminal C)
AC	—	—	—	—	—	—
AD	—	—	—	—	—	—
AE	Yaw rate (reference signal)	Combined sensor	Continuity	AE—combined sensor connector terminal A	Continuity detected	• Wiring harness (AE—combined sensor connector terminal A)
AF	—	—	—	—	—	—
AG	—	—	—	—	—	—
AH	—	—	—	—	—	—
AI	Lateral-G (signal)	Combined sensor	Continuity	AI—combined sensor connector terminal D	Continuity detected	• Wiring harness (AI—combined sensor connector terminal D)
AJ	—	—	—	—	—	—
AK	—	—	—	—	—	—
AL	—	—	—	—	—	—
AM	—	—	—	—	—	—
AN	—	—	—	—	—	—
AO	—	—	—	—	—	—
AP	—	—	—	—	—	—
AQ	—	—	—	—	—	—
AR	—	—	—	—	—	—
AS	—	—	—	—	—	—
AT	—	—	—	—	—	—