DSC HU/CM INSPECTION

id041500801100

1. Disconnect the DSC HU/CM connector. (See DSC HU/CM REMOVAL/INSTALLATION [WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].)(See DSC HU/CM REMOVAL/INSTALLATION [WITH CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].)(See DSC HU/CM REMOVAL/INSTALLATION [SKYACTIV-G 2.5T].)(See DSC HU/CM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)

2. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.)

3. Attach the tester lead to the DSC HU/CM wiring harness-side connector and inspect voltage, continuity, or resistance according to the standard (reference) on the table.

Standard (Reference)

ac5uuw00007923

Terminal

Signal name

Connected to

Measured item

Measured terminal (measurement condition)

Standard

Inspection item(s)

A

Power supply

(solenoid operation)

Battery

Voltage

Under any condition

B+

•  Wiring harness (A—battery)

B

Power supply

(motor operation)

Battery

Voltage

Under any condition

B+

•  Wiring harness (B—battery)

C

RF wheel-speed (-)

RF ABS wheel-speed sensor

Continuity

C—RF ABS wheel-speed sensor terminal B

Continuity detected

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

D

—

—

—

—

—

—

E

—

—

—

—

—

—

F

RF wheel-speed (+)

RF ABS wheel-speed sensor

Continuity

F—RF ABS wheel-speed sensor terminal A

Continuity detected

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

G

—

—

—

—

—

—

H

—

—

—

—

—

—

I

—

—

—

—

—

—

J

—

—

—

—

—

—

K

—

—

—

—

—

—

L

LR wheel-speed (+)

LR ABS wheel-speed sensor

Continuity

L—LR ABS wheel-speed sensor terminal B

Continuity detected

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

M

—

—

—

—

—

—

N

—

—

—

—

—

—

O

LR wheel-speed (-)

LR wheel-speed sensor

Continuity

O—LR ABS wheel-speed sensor terminal D

Continuity detected

•  Wiring harness (O—LR ABS wheel-speed sensor terminal D)

P

—

—

—

—

—

—

Q

Power supply (system)

IG1 relay

Voltage

Ignition switched ON (engine off).

B+

•  Wiring harness (Q—IG1 relay)

Switch the ignition to off.

1 V or less

R

—

—

—

—

—

—

S

—

—

—

—

—

—

T

—

—

—

—

—

—

U

—

—

—

—

—

—

V

—

—

—

—

—

—

W

—

—

—

—

—

—

X

RR wheel-speed (-)

RR ABS wheel-speed sensor

Continuity

X—RR ABS wheel-speed sensor terminal D

Continuity detected

•  Wiring harness (X—RR ABS wheel-speed sensor terminal D)

Y

—

—

—

—

—

—

Z

—

—

—

—

—

—

AA

RR wheel-speed (+)

RR ABS wheel-speed sensor

Continuity

AA—RR ABS wheel-speed sensor terminal B

Continuity detected

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

AB

—

—

—

—

—

—

AC

CAN_L

CAN module

This terminal is used for communication and cannot be used for malfunction determination during terminal voltage inspection. Perform a DTC inspection.

AD

—

—

—

—

—

—

AE

—

—

—

—

—

—

AF

CAN_H

CAN module

This terminal is used for communication and cannot be used for malfunction determination during terminal voltage inspection. Perform a DTC inspection.

AG

LF wheel-speed sensor (+)

LF ABS wheel-speed sensor

Continuity

AG—LF ABS wheel-speed sensor terminal A

Continuity detected

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

AH

—

—

—

—

—

—

AI

Brake light

Brake light relay or brake light unit

Voltage

Brake pedal depressed

B+

•  Wiring harness (AI—brake light relay or brake light unit)

Brake pedal released

1 V or less

AJ

LF wheel-speed sensor (-)

LF wheel-speed sensor

Continuity

AJ—LF ABS wheel-speed sensor terminal B

Continuity detected

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

AK

—

—

—

—

—

—

AL

Ground

Ground point

Continuity

AL—ground point

Continuity detected

•  Wiring harness (AL—ground point)

Terminal	Signal name	Connected to	Measured item	Measured terminal (measurement condition)	Standard	Inspection item(s)
A	Power supply (solenoid operation)	Battery	Voltage	Under any condition	B+	• Wiring harness (A—battery)
B	Power supply (motor operation)	Battery	Voltage	Under any condition	B+	• Wiring harness (B—battery)
C	RF wheel-speed (-)	RF ABS wheel-speed sensor	Continuity	C—RF ABS wheel-speed sensor terminal B	Continuity detected	• Wiring harness (C—RF ABS wheel-speed sensor terminal B)
D	—	—	—	—	—	—
E	—	—	—	—	—	—
F	RF wheel-speed (+)	RF ABS wheel-speed sensor	Continuity	F—RF ABS wheel-speed sensor terminal A	Continuity detected	• Wiring harness (F—RF ABS wheel-speed sensor terminal A)
G	—	—	—	—	—	—
H	—	—	—	—	—	—
I	—	—	—	—	—	—
J	—	—	—	—	—	—
K	—	—	—	—	—	—
L	LR wheel-speed (+)	LR ABS wheel-speed sensor	Continuity	L—LR ABS wheel-speed sensor terminal B	Continuity detected	• Wiring harness (L—LR ABS wheel-speed sensor terminal B)
M	—	—	—	—	—	—
N	—	—	—	—	—	—
O	LR wheel-speed (-)	LR wheel-speed sensor	Continuity	O—LR ABS wheel-speed sensor terminal D	Continuity detected	• Wiring harness (O—LR ABS wheel-speed sensor terminal D)
P	—	—	—	—	—	—
Q	Power supply (system)	IG1 relay	Voltage	Ignition switched ON (engine off).	B+	• Wiring harness (Q—IG1 relay)
Q	Power supply (system)	IG1 relay	Voltage	Switch the ignition to off.	1 V or less	• Wiring harness (Q—IG1 relay)
R	—	—	—	—	—	—
S	—	—	—	—	—	—
T	—	—	—	—	—	—
U	—	—	—	—	—	—
V	—	—	—	—	—	—
W	—	—	—	—	—	—
X	RR wheel-speed (-)	RR ABS wheel-speed sensor	Continuity	X—RR ABS wheel-speed sensor terminal D	Continuity detected	• Wiring harness (X—RR ABS wheel-speed sensor terminal D)
Y	—	—	—	—	—	—
Z	—	—	—	—	—	—
AA	RR wheel-speed (+)	RR ABS wheel-speed sensor	Continuity	AA—RR ABS wheel-speed sensor terminal B	Continuity detected	• Wiring harness (AA—RR ABS wheel-speed sensor terminal B)
AB	—	—	—	—	—	—
AC	CAN_L	CAN module	This terminal is used for communication and cannot be used for malfunction determination during terminal voltage inspection. Perform a DTC inspection.
AD	—	—	—	—	—	—
AE	—	—	—	—	—	—
AF	CAN_H	CAN module	This terminal is used for communication and cannot be used for malfunction determination during terminal voltage inspection. Perform a DTC inspection.
AG	LF wheel-speed sensor (+)	LF ABS wheel-speed sensor	Continuity	AG—LF ABS wheel-speed sensor terminal A	Continuity detected	• Wiring harness (AG—LF ABS wheel-speed sensor terminal A)
AH	—	—	—	—	—	—
AI	Brake light	Brake light relay or brake light unit	Voltage	Brake pedal depressed	B+	• Wiring harness (AI—brake light relay or brake light unit)
AI	Brake light	Brake light relay or brake light unit	Voltage	Brake pedal released	1 V or less	• Wiring harness (AI—brake light relay or brake light unit)
AJ	LF wheel-speed sensor (-)	LF wheel-speed sensor	Continuity	AJ—LF ABS wheel-speed sensor terminal B	Continuity detected	• Wiring harness (AJ—LF ABS wheel-speed sensor terminal B)
AK	—	—	—	—	—	—
AL	Ground	Ground point	Continuity	AL—ground point	Continuity detected	• Wiring harness (AL—ground point)