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 | — | — | — | — | — | —