DSC HU/CM INSPECTION

id041500801100

1. Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

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

3. Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

4. Attach the tester lead to the DSC HU/CM wiring harness-side connector and inspect voltage, continuity, or resistance according to the Terminal Voltage Table (Reference) on the table.

Terminal Voltage Table (Reference)

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Terminal

Signal name

Connected to

Measured item

Measured terminal (measurement condition)

Specification

Inspection item(s)

A

Power supply

(solenoid operation)

Battery

Voltage

Under any condition

B+

•  Wiring harness (DSC HU/CM terminal A—battery)

B

Power supply

(pump motor operation)

Battery

Voltage

Under any condition

B+

•  Wiring harness (DSC HU/CM terminal B—battery)

C

RF ABS wheel-speed sensor (-)

RF ABS wheel-speed sensor

Continuity

DSC HU/CM terminal C—RF ABS wheel-speed sensor terminal B

Continuity detected

•  Wiring harness (DSC HU/CM terminal C—RF ABS wheel-speed sensor terminal B)

D

—

—

—

—

—

—

E

—

—

—

—

—

—

F

RF ABS wheel-speed sensor (+)

RF ABS wheel-speed sensor

Continuity

DSC HU/CM terminal F—RF ABS wheel-speed sensor terminal A

Continuity detected

•  Wiring harness (DSC HU/CM terminal F—RF ABS wheel-speed sensor terminal A)

G

—

—

—

—

—

—

H

—

—

—

—

—

—

I

—

—

—

—

—

—

J

—

—

—

—

—

—

K

—

—

—

—

—

—

L

LR ABS wheel-speed sensor (+)

LR ABS wheel-speed sensor

Continuity

DSC HU/CM terminal L—LR ABS wheel-speed sensor terminal A

Continuity detected

•  Wiring harness (DSC HU/CM terminal L—LR ABS wheel-speed sensor terminal A)

M

—

—

—

—

—

—

N

—

—

—

—

—

—

O

LR ABS wheel-speed sensor (-)

LR ABS wheel-speed sensor

Continuity

DSC HU/CM terminal O—LR ABS wheel-speed sensor terminal B

Continuity detected

•  Wiring harness (DSC HU/CM terminal O—LR ABS wheel-speed sensor terminal B)

P

—

—

—

—

—

—

Q

Power supply (system)

IG1 relay

Voltage

Ignition ON (engine off)

B+

•  Wiring harness (DSC HU/CM terminal Q—IG1 relay)

Ignition off

1.0 V or less

R

—

—

—

—

—

—

S

—

—

—

—

—

—

T

—

—

—

—

—

—

U

—

—

—

—

—

—

V

—

—

—

—

—

—

W

—

—

—

—

—

—

X

RR ABS wheel-speed sensor (-)

RR ABS wheel-speed sensor

Continuity

DSC HU/CM terminal X—RR ABS wheel-speed sensor terminal B

Continuity detected

•  Wiring harness (DSC HU/CM terminal X—RR ABS wheel-speed sensor terminal B)

Y

—

—

—

—

—

—

Z

—

—

—

—

—

—

AA

RR ABS wheel-speed sensor (+)

RR ABS wheel-speed sensor

Continuity

DSC HU/CM terminal AA—RR ABS wheel-speed sensor terminal A

Continuity detected

•  Wiring harness (DSC HU/CM terminal AA—RR ABS wheel-speed sensor terminal A)

AB

—

—

—

—

—

—

AC

CAN_L

CAN related module

Because this terminal is for communication, determination using terminal voltage inspection is not possible. Perform the inspection using the DTC inspection.

AD

—

—

—

—

—

—

AE

—

—

—

—

—

—

AF

CAN_H

CAN related module

Because this terminal is for communication, determination using terminal voltage inspection is not possible. Perform the inspection using the DTC inspection.

AG

LF ABS wheel-speed sensor (+)

LF ABS wheel-speed sensor

Continuity

DSC HU/CM terminal AG—LF ABS wheel-speed sensor terminal A

Continuity detected

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

AH

—

—

—

—

—

—

AI^*1

Brake light

Brake light relay

Voltage

Brake pedal depressed

B+

•  Wiring harness (DSC HU/CM terminal AI—Brake light relay)

Brake pedal released

1.0 V or less

AJ

LF ABS wheel-speed sensor (-)

LF ABS wheel-speed sensor

Continuity

DSC HU/CM terminal AJ—LF ABS wheel-speed sensor terminal B

Continuity detected

•  Wiring harness (DSC HU/CM terminal AJ—LF ABS wheel-speed sensor terminal B)

AK

—

—

—

—

—

—

AL

Ground

Ground point

Continuity

DSC HU/CM terminal AL—ground point

Continuity detected

•  Wiring harness (DSC HU/CM terminal AL—ground point)

Terminal	Signal name	Connected to	Measured item	Measured terminal (measurement condition)	Specification	Inspection item(s)
A	Power supply (solenoid operation)	Battery	Voltage	Under any condition	B+	• Wiring harness (DSC HU/CM terminal A—battery)
B	Power supply (pump motor operation)	Battery	Voltage	Under any condition	B+	• Wiring harness (DSC HU/CM terminal B—battery)
C	RF ABS wheel-speed sensor (-)	RF ABS wheel-speed sensor	Continuity	DSC HU/CM terminal C—RF ABS wheel-speed sensor terminal B	Continuity detected	• Wiring harness (DSC HU/CM terminal C—RF ABS wheel-speed sensor terminal B)
D	—	—	—	—	—	—
E	—	—	—	—	—	—
F	RF ABS wheel-speed sensor (+)	RF ABS wheel-speed sensor	Continuity	DSC HU/CM terminal F—RF ABS wheel-speed sensor terminal A	Continuity detected	• Wiring harness (DSC HU/CM terminal F—RF ABS wheel-speed sensor terminal A)
G	—	—	—	—	—	—
H	—	—	—	—	—	—
I	—	—	—	—	—	—
J	—	—	—	—	—	—
K	—	—	—	—	—	—
L	LR ABS wheel-speed sensor (+)	LR ABS wheel-speed sensor	Continuity	DSC HU/CM terminal L—LR ABS wheel-speed sensor terminal A	Continuity detected	• Wiring harness (DSC HU/CM terminal L—LR ABS wheel-speed sensor terminal A)
M	—	—	—	—	—	—
N	—	—	—	—	—	—
O	LR ABS wheel-speed sensor (-)	LR ABS wheel-speed sensor	Continuity	DSC HU/CM terminal O—LR ABS wheel-speed sensor terminal B	Continuity detected	• Wiring harness (DSC HU/CM terminal O—LR ABS wheel-speed sensor terminal B)
P	—	—	—	—	—	—
Q	Power supply (system)	IG1 relay	Voltage	Ignition ON (engine off)	B+	• Wiring harness (DSC HU/CM terminal Q—IG1 relay)
Ignition off	1.0 V or less
R	—	—	—	—	—	—
S	—	—	—	—	—	—
T	—	—	—	—	—	—
U	—	—	—	—	—	—
V	—	—	—	—	—	—
W	—	—	—	—	—	—
X	RR ABS wheel-speed sensor (-)	RR ABS wheel-speed sensor	Continuity	DSC HU/CM terminal X—RR ABS wheel-speed sensor terminal B	Continuity detected	• Wiring harness (DSC HU/CM terminal X—RR ABS wheel-speed sensor terminal B)
Y	—	—	—	—	—	—
Z	—	—	—	—	—	—
AA	RR ABS wheel-speed sensor (+)	RR ABS wheel-speed sensor	Continuity	DSC HU/CM terminal AA—RR ABS wheel-speed sensor terminal A	Continuity detected	• Wiring harness (DSC HU/CM terminal AA—RR ABS wheel-speed sensor terminal A)
AB	—	—	—	—	—	—
AC	CAN_L	CAN related module	Because this terminal is for communication, determination using terminal voltage inspection is not possible. Perform the inspection using the DTC inspection.
AD	—	—	—	—	—	—
AE	—	—	—	—	—	—
AF	CAN_H	CAN related module	Because this terminal is for communication, determination using terminal voltage inspection is not possible. Perform the inspection using the DTC inspection.
AG	LF ABS wheel-speed sensor (+)	LF ABS wheel-speed sensor	Continuity	DSC HU/CM terminal AG—LF ABS wheel-speed sensor terminal A	Continuity detected	• Wiring harness (AG—LF ABS wheel-speed sensor terminal A)
AH	—	—	—	—	—	—
AI^*1	Brake light	Brake light relay	Voltage	Brake pedal depressed	B+	• Wiring harness (DSC HU/CM terminal AI—Brake light relay)
Brake pedal released	1.0 V or less
AJ	LF ABS wheel-speed sensor (-)	LF ABS wheel-speed sensor	Continuity	DSC HU/CM terminal AJ—LF ABS wheel-speed sensor terminal B	Continuity detected	• Wiring harness (DSC HU/CM terminal AJ—LF ABS wheel-speed sensor terminal B)
AK	—	—	—	—	—	—
AL	Ground	Ground point	Continuity	DSC HU/CM terminal AL—ground point	Continuity detected	• Wiring harness (DSC HU/CM terminal AL—ground point)

*1 :With Smart City Brake Support (SCBS)