Subaru 2009 IMPREZA Service Manual page 2397

Step
1 CHECK IGNITION SWITCH.
2 CHECK BATTERY.
1) Turn the ignition switch to OFF.
2) Measure the battery voltage.
3 CHECK BATTERY TERMINAL.
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.
5 CHECK SUBARU SELECT MONITOR COM-
MUNICATION.
1) Turn the ignition switch to OFF.
2) Disconnect the ABSCM&H/U connectors.
3) Turn the ignition switch to ON.
4) Check whether communication to other sys-
tems can be executed normally.
6 CHECK HARNESS CONNECTOR BETWEEN
EACH CONTROL MODULE AND DATA LINK
CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the ABSCM&H/U, ECM and
TCM.
3) Measure the resistance between data link
connector and chassis ground.
Connector & terminal
(B40) No. 7 — Chassis ground:
7 CHECK ABSCM&H/U OUTPUT SIGNAL.
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 (–):
8 CHECK HARNESS CONNECTOR BETWEEN
ABSCM&H/U AND DATA LINK CONNEC-
TOR.
Measure the resistance between ABSCM&H/U
connector and data link connector.
Connector & terminal
(B301) No. 7 — (B40) No. 7:
9 CHECK INSTALLATION OF ABSCM&H/U
CONNECTOR.
Turn the ignition switch to OFF.
10 CHECK POWER SUPPLY CIRCUIT.
1) Turn the ignition switch to ON. (engine OFF)
2) Measure the ignition power supply voltage
between ABSCM&H/U connector and chassis
ground.
Connector & terminal
(B301) No. 18 (+) — Chassis ground (–):
Subaru Select Monitor
Check
Is the ignition switch ON?
Is the voltage 11 V or more?
Is there poor contact at the bat-
tery terminal?
Is the system name displayed
on Subaru Select Monitor?
Is the system name displayed
on Subaru Select Monitor?
Is the resistance 1 M or
more?
Is the voltage less than 1 V?
Is the resistance less than 0.5 ? Go to step 9.
Is the ABSCM&H/U connector
inserted into ABSCM&H/U until
the clamp locks onto it?
Is the voltage 10 — 15 V?
ABS(diag)-17
ABS (DIAGNOSTICS)
Yes No
Go to step 2. Turn the ignition
switch to ON, and
select ABS mode
using Subaru
Select Monitor.
Go to step 3. Charge or replace
the battery.
Repair or tighten Go to step 4.
the battery termi-
nal.
Go to step 8. Go to step 5.
Replace the Go to step 6.
ABSCM&H/U.
<Ref. to ABS-6,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
Go to step 7. Repair the harness
and connector
between each con-
trol module and
data link connec-
tor.
Go to step 8. Repair the harness
and connector
between each con-
trol module and
data link connec-
tor.
Repair harness
and connector
between
ABSCM&H/U and
data link connec-
tor.
Go to step 10. Insert ABSCM&H/
U connector into
ABSCM&H/U.
Go to step 11. Repair open circuit
of harness
between
ABSCM&H/U and
battery.