DSC HU/CM INSPECTION


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1.  Disconnect the DSC HU/CM connector. (See DSC HU/CM REMOVAL/INSTALLATION.)

2.  Connect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [L8, LF].)

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 (–)
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 (+)
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 (+)
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 (–)
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 (+)
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 position
B+
•  Wiring harness (J—ignition switch)
Ignition switch is LOCK position
1 V or less
K
L
RR wheel-speed sensor (–)
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 (+)
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 (–)
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
DSC OFF switch
DSC OFF switch
Continuity
P—DSC OFF switch connector terminal A (L.H.D) or C (R.H.D.)
Continuity detected
•  Wiring harness (P—DSC OFF switch connector terminal A (L.H.D.) or C (R.H.D.))
Q
R
S
T
U
V
W
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.
X
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.
Y
Z
AA
AB
AC
AD
AE
AF
AG
AH
AI
AJ
AK
AL
AM
AN
AO
AP
AQ
AR
CAN2_H
Combined sensor
Continuity
AR—combined sensor connector terminal C
Continuity detected
•  Wiring harness (AR—combined sensor connector terminal C)
AS
CAN2_L
Combined sensor
Continuity
AS—combined sensor connector terminal B
Continuity detected
•  Wiring harness (AS—combined sensor connector terminal B)
AT