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 NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].)

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)

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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 (pump motor)	Ground point	Continuity	B—ground point	Continuity detected	•  Wiring harness (B—ground point)
C	Brake light (vehicles with smart brake support (SBS) or smart city brake support (SCBS))	Brake light relay*1 or brake light unit*2*3	Voltage	Brake pedal depressed	B+	•  Wiring harness (C—Brake light relay terminal D or brake light unit terminal H)
				Brake pedal not depressed	1 V or less
D	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.
E	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.
F	CAN2_L	SAS control module	This terminal is used for communication and cannot be used for malfunction determination during terminal voltage inspection. Perform a DTC inspection.
G	CAN2_H	SAS control module	This terminal is used for communication and cannot be used for malfunction determination during terminal voltage inspection. Perform a DTC inspection.
H	—	—	—	—	—	—
I	LR wheel-speed sensor (-)	LR ABS wheel-speed sensor	Continuity	I—LR ABS wheel-speed sensor terminal B	Continuity detected	•  Wiring harness (I—LR ABS wheel-speed sensor terminal B)
J	RR wheel-speed sensor (-)	RR ABS wheel-speed sensor	Continuity	J—RR ABS wheel-speed sensor terminal B	Continuity detected	•  Wiring harness (J—RR ABS wheel-speed sensor terminal B)
K	—	—	—	—	—	—
L	LR wheel-speed sensor (+)	LR ABS wheel-speed sensor	Continuity	L—LR ABS wheel-speed sensor terminal A	Continuity detected	•  Wiring harness (L—LR ABS wheel-speed sensor terminal A)
M	RR wheel-speed sensor (+)	RR ABS wheel-speed sensor	Continuity	M—RR ABS wheel-speed sensor terminal A	Continuity detected	•  Wiring harness (M—RR ABS wheel-speed sensor terminal A)
N	—	—	—	—	—	—
O	RF wheel-speed sensor (-)	RF ABS wheel-speed sensor	Continuity	O—RF ABS wheel-speed sensor terminal B	Continuity detected	•  Wiring harness (O—RF ABS wheel-speed sensor terminal B)
P	LF wheel-speed sensor (-)	LF ABS wheel-speed sensor	Continuity	P—LF ABS wheel-speed sensor terminal B	Continuity detected	•  Wiring harness (P—LF ABS wheel-speed sensor terminal B)
Q	—	—	—	—	—	—
R	RF wheel-speed sensor (+)	RF ABS wheel-speed sensor	Continuity	R—RF ABS wheel-speed sensor terminal A	Continuity detected	•  Wiring harness (R—RF ABS wheel-speed sensor terminal A)
S	LF wheel-speed sensor (+)	LF ABS wheel-speed sensor	Continuity	S—LF ABS wheel-speed sensor terminal A	Continuity detected	•  Wiring harness (S—LF ABS wheel-speed sensor terminal A)
T	—	—	—	—	—	—
U	—	—	—	—	—	—
V	—	—	—	—	—	—
W	—	—	—	—	—	—
X	—	—	—	—	—	—
Y	—	—	—	—	—	—
Z	—	—	—	—	—	—
AA	—	—	—	—	—	—
AB	—	—	—	—	—	—
AC	—	—	—	—	—	—
AD	—	—	—	—	—	—
AE	—	—	—	—	—	—
AF	Power supply (system)	Ignition switch	Voltage	Ignition switched ON (engine off).	B+	•  Wiring harness (AF—ignition switch)
				Switch the ignition to off.	1 V or less
AG	Power supply (solenoid operation)	Battery	Voltage	Under any condition	B+	•  Wiring harness (AG—battery)
AH	Power supply (pump motor operation)	Battery	Voltage	Under any condition	B+	•  Wiring harness (AH—battery)