Subaru LEGACY 2003 Service Manual page 83

DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR
Step
1 CHECK IGNITION SWITCH.
Is ignition switch to ON?
2 CHECK BATTERY.
1) Turn ignition switch to OFF.
2) Measure battery voltage.
Does the measured value exceed the spec-
ified value?
3 CHECK BATTERY TERMINAL.
Is there poor contact at battery terminal?
4 CHECK COMMUNICATION OF SELECT
MONITOR.
1) Turn ignition switch to ON.
2) Using the select monitor, check whether
communication to other systems can be
executed normally.
Are the name and year of the system dis-
played on the select monitor?
5 CHECK COMMUNICATION OF SELECT
MONITOR.
1) Turn ignition switch to OFF.
2) Disconnect ABSCM&H/U connector.
3) Check whether communication to other
systems can be executed normally.
Are the name and year of the system dis-
played on the select monitor?
6 CHECK HARNESS CONNECTOR BETWEEN
EACH CONTROL MODULE AND DATA LINK
CONNECTOR.
1) Turn ignition switch to OFF.
2) Disconnect ABSCM&H/U, cruise control
module and immobilizer control module
connectors.
3) Measure resistance between data link con-
nector and chassis ground.
Connector & terminal
(B40) No. 5 — Chassis ground:
(B40) No. 4 — Chassis ground:
Does the measured value exceed the spec-
ified value?
7 CHECK OUTPUT SIGNAL FOR ABSCM&H/
U.
1) Turn ignition switch to ON.
2) Measure voltage between data link connec-
tor and chassis ground.
Connector & terminal
(B40) No. 5 (+) — Chassis ground ( − − − − ):
(B40) No. 4 (+) — Chassis ground ( − − − − ):
Does the measured value exceed the spec-
ified value?
Value
Ignition switch is to ON.
11 V
There is no poor contact.
Name and year of the system
are displayed.
Name and year of the system
are displayed.
1 MΩ
1 V
ABS-81
ABS (DIAGNOSTICS)
Yes
Go to step 2. Turn ignition
switch to ON, and
select ABS mode
using the select
monitor.
Go to step 3. Charge or replace
battery.
Go to step 4. Repair or tighten
battery terminal.
Go to step 7. Go to step 5.
Go to step 7. Go to step 6.
Go to step 7. Repair harness
and connector
between each
control module
and data link con-
nector.
Repair harness Go to step 8.
and connector
between each
control module
and data link con-
nector.
No