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 [MZR 1.3, MZR 1.5].) (See BATTERY REMOVAL/INSTALLATION [MZ-CD 1.6].)

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

Standard (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

—

—

—

—

—

—

E

—

—

—

—

—

—

F

LF wheel-speed sensor (ground)

LF wheel-speed sensor

Continuity

F—LF ABS wheel-speed sensor terminal B

Continuity detected

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

G

—

—

—

—

—

—

H

Sensor ground

Combined sensor

Continuity

H—combined sensor terminal D

Continuity detected

•  Wiring harness (H—combined sensor terminal D)

I

LF wheel-speed sensor (single)

LF ABS wheel-speed sensor

Continuity

I—LF ABS wheel-speed sensor terminal A

Continuity detected

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

J

CAN_L

DLC-2 (CAN_L)

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

K

—

—

—

—

—

—

L

—

—

—

—

—

—

M

CAN_H

DLC-2 (CAN_H)

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

N

—

—

—

—

—

—

O

RR wheel-speed (signal)

RR ABS wheel-speed sensor

Continuity

O—RR ABS wheel-speed sensor terminal A

Continuity detected

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

P

—

—

—

—

—

—

Q

—

—

—

—

—

—

R

RR wheel-speed (ground)

RR ABS wheel-speed sensor

Continuity

R—RR ABS wheel-speed sensor terminal B

Continuity detected

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

S

—

—

—

—

—

—

T

—

—

—

—

—

—

U

—

—

—

—

—

—

V

—

—

—

—

—

—

W

—

—

—

—

—

—

X

—

—

—

—

—

—

Y

Power supply (system)

Ignition switch

Voltage

The ignition switch is at the ON position.

B+

•  Wiring harness (Y—ignition switch)

The ignition switch is off.

1 V or less

—

Z

—

—

—

—

—

—

AA

DSC OFF switch

DSC OFF switch

Continuity

AA—DSC OFF switch

Continuity detected

•  Wiring harness (AA—DSC OFF switch)

AB

—

—

—

—

—

—

AC

Sensor power supply

Combined sensor

Continuity

AC—combined sensor terminal A

Continuity detected

•  Wiring harness (AC—combined sensor terminal A)

AD

—

—

—

—

—

—

AE

—

—

—

—

—

—

AF

—

—

—

—

—

—

AG

LR wheel-speed (ground)

LR wheel-speed sensor

Continuity

AG—LR ABS wheel-speed sensor terminal B

Continuity detected

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

AH

—

—

—

—

—

—

AI

—

—

—

—

—

—

AJ

LR wheel-speed (signal)

LR ABS wheel-speed sensor

Continuity

AJ—LR ABS wheel-speed sensor terminal A

Continuity detected

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

AK

—

—

—

—

—

—

AL

CAN2_L

Combined sensor

Continuity

AL—combined sensor terminal B

Continuity detected

•  Wiring harness (AL—combined sensor terminal B)

AM

—

—

—

—

—

—

AN

—

—

—

—

—

—

AO

CAN2_H

Combined sensor

Continuity

AO—combined sensor terminal C

Continuity detected

•  Wiring harness (AO—combined sensor terminal C)

AP

RF wheel-speed (signal)

RF ABS wheel-speed sensor

Continuity

AP—RF ABS wheel-speed sensor terminal A

Continuity detected

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

AQ

—

—

—

—

—

—

AR

—

—

—

—

—

—

AS

RF wheel-speed (ground)

RF ABS wheel-speed sensor

Continuity

AS—RF ABS wheel-speed sensor terminal B

Continuity detected

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

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	—	—	—	—	—	—
E	—	—	—	—	—	—
F	LF wheel-speed sensor (ground)	LF wheel-speed sensor	Continuity	F—LF ABS wheel-speed sensor terminal B	Continuity detected	• Wiring harness (F—LF ABS wheel-speed sensor terminal B)
G	—	—	—	—	—	—
H	Sensor ground	Combined sensor	Continuity	H—combined sensor terminal D	Continuity detected	• Wiring harness (H—combined sensor terminal D)
I	LF wheel-speed sensor (single)	LF ABS wheel-speed sensor	Continuity	I—LF ABS wheel-speed sensor terminal A	Continuity detected	• Wiring harness (I—LF ABS wheel-speed sensor terminal A)
J	CAN_L	DLC-2 (CAN_L)	This terminal is used for communication and cannot be used for malfunction determination during terminal voltage inspection. Perform a DTC inspection.
K	—	—	—	—	—	—
L	—	—	—	—	—	—
M	CAN_H	DLC-2 (CAN_H)	This terminal is used for communication and cannot be used for malfunction determination during terminal voltage inspection. Perform a DTC inspection.
N	—	—	—	—	—	—
O	RR wheel-speed (signal)	RR ABS wheel-speed sensor	Continuity	O—RR ABS wheel-speed sensor terminal A	Continuity detected	• Wiring harness (O—RR ABS wheel-speed sensor terminal A)
P	—	—	—	—	—	—
Q	—	—	—	—	—	—
R	RR wheel-speed (ground)	RR ABS wheel-speed sensor	Continuity	R—RR ABS wheel-speed sensor terminal B	Continuity detected	• Wiring harness (R—RR ABS wheel-speed sensor terminal B)
S	—	—	—	—	—	—
T	—	—	—	—	—	—
U	—	—	—	—	—	—
V	—	—	—	—	—	—
W	—	—	—	—	—	—
X	—	—	—	—	—	—
Y	Power supply (system)	Ignition switch	Voltage	The ignition switch is at the ON position.	B+	• Wiring harness (Y—ignition switch)
Y	Power supply (system)	Ignition switch	Voltage	The ignition switch is off.	1 V or less	—
Z	—	—	—	—	—	—
AA	DSC OFF switch	DSC OFF switch	Continuity	AA—DSC OFF switch	Continuity detected	• Wiring harness (AA—DSC OFF switch)
AB	—	—	—	—	—	—
AC	Sensor power supply	Combined sensor	Continuity	AC—combined sensor terminal A	Continuity detected	• Wiring harness (AC—combined sensor terminal A)
AD	—	—	—	—	—	—
AE	—	—	—	—	—	—
AF	—	—	—	—	—	—
AG	LR wheel-speed (ground)	LR wheel-speed sensor	Continuity	AG—LR ABS wheel-speed sensor terminal B	Continuity detected	• Wiring harness (AG—LR ABS wheel-speed sensor terminal B)
AH	—	—	—	—	—	—
AI	—	—	—	—	—	—
AJ	LR wheel-speed (signal)	LR ABS wheel-speed sensor	Continuity	AJ—LR ABS wheel-speed sensor terminal A	Continuity detected	• Wiring harness (AJ—LR ABS wheel-speed sensor terminal A)
AK	—	—	—	—	—	—
AL	CAN2_L	Combined sensor	Continuity	AL—combined sensor terminal B	Continuity detected	• Wiring harness (AL—combined sensor terminal B)
AM	—	—	—	—	—	—
AN	—	—	—	—	—	—
AO	CAN2_H	Combined sensor	Continuity	AO—combined sensor terminal C	Continuity detected	• Wiring harness (AO—combined sensor terminal C)
AP	RF wheel-speed (signal)	RF ABS wheel-speed sensor	Continuity	AP—RF ABS wheel-speed sensor terminal A	Continuity detected	• Wiring harness (AP—RF ABS wheel-speed sensor terminal A)
AQ	—	—	—	—	—	—
AR	—	—	—	—	—	—
AS	RF wheel-speed (ground)	RF ABS wheel-speed sensor	Continuity	AS—RF ABS wheel-speed sensor terminal B	Continuity detected	• Wiring harness (AS—RF ABS wheel-speed sensor terminal B)
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)