VDC(diag)-23
Subaru Select Monitor
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
3
CHECK BATTERY TERMINAL.
Is there poor contact at battery
terminal?
Repair or tighten
the battery termi-
nal.
Go to step
4.
4
CHECK SUBARU SELECT MONITOR COM-
MUNICATION.
1) Turn the ignition switch to ON.
2) Using the Subaru Select Monitor, check
whether communication to other systems can
be executed normally.
Is the system name displayed
on Subaru Select Monitor?
Go to step
8.
Go to step
5.
5
CHECK SUBARU SELECT MONITOR COM-
MUNICATION.
1) Turn the ignition switch to OFF.
2) Disconnect the VDCCM&H/U connector.
3) Turn the ignition switch to ON.
4) Check whether communication to other sys-
tems can be executed normally.
Is the system name displayed
on Subaru Select Monitor?
Replace the
VDCCM only.
<Ref. to VDC-12,
REPLACEMENT,
VDC Control Mod-
ule and Hydraulic
Control Unit
(VDCCM&H/U).>
Go to step
6.
6
CHECK HARNESS CONNECTOR BETWEEN
EACH CONTROL MODULE AND DATA LINK
CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from ECM, air-
bag CM, TPMS & keyless entry CM, DCCD CM
(6MT model only) and body integrated unit.
CAUTION:
When disconnecting the connector from air-
bag CM, always follow the precautions on
AB section. <Ref. to AB-5, CAUTION, Gener-
al Description.>
3) Measure the resistance between data link
connector and chassis ground.
Connector & terminal
(B40) No. 7 — Chassis ground:
Is the resistance 1 MΩ or
more?
Go to step
7.
Repair the harness
and connector
between each con-
trol module and
data link connec-
tor.
7
CHECK HARNESS CONNECTOR BETWEEN
VDCCM&H/U AND DATA LINK CONNEC-
TOR.
1) Turn the ignition switch to ON.
2) Measure the voltage between data link con-
nector and chassis ground.
Connector & terminal
(B40) No. 7 (+) — Chassis ground (–):
Is the voltage less than 1 V?
Go to step
8.
Repair the harness
and connector
between each con-
trol module and
data link connec-
tor.
8
CHECK HARNESS CONNECTOR BETWEEN
VDCCM&H/U AND DATA LINK CONNEC-
TOR.
Measure the resistance between VDCCM&H/U
connector and data link connector.
Connector & terminal
(B310) No. 7 — (B40) No. 7:
Is the resistance less than 1 Ω? Go to step
9.
Repair harness
and connector
between
VDCCM&H/U and
data link connec-
tor.
9
CHECK INSTALLATION OF VDCCM&H/U
CONNECTOR.
Turn the ignition switch to OFF.
Is the VDCCM&H/U connector
inserted into VDCCM&H/U until
the clamp locks onto it?
Go to step
10.
Insert
VDCCM&H/U
connector into
VDCCM&H/U.
10
CHECK POWER SUPPLY CIRCUIT.
1) Turn the ignition switch to ON. (engine OFF)
2) Measure the ignition power supply voltage
between VDCCM&H/U connector and chassis
ground.
Connector & terminal
(B310) No. 28 (+) — Chassis ground (–):
Is the voltage 10 — 15 V?
Go to step
11.
Repair the open
circuit and poor
contact of the con-
nector between
VDCCM&H/U and
battery.
Step
Check
Yes
No