Subaru Legacy 2002 Service Manual page 2594

DIAGNOSTICS CHART WITH SELECT MONITOR
No.
1 CHECK IGNITION SWITCH.
2 CHECK BATTERY.
1) Turn ignition switch to OFF.
2) Measure battery voltage.
3 CHECK 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.
5 CHECK COMMUNICATION OF SELECT
MONITOR.
1) Turn ignition switch to OFF.
2) Disconnect VDCCM connector.
3) Check whether communication to other
systems can be executed normally.
6 CHECK COMMUNICATION OF SELECT
MONITOR.
1) Turn ignition switch to OFF.
2) Connect VDCCM module connector.
3) Disconnect cruise control module connec-
tor.
4) Check whether communication to other
systems can be executed normally.
NOTE:
If the vehicle is not equipped with cruise con-
trol: Go to step 7.
7 CHECK HARNESS CONNECTOR
BETWEEN EACH CONTROL MODULE AND
DATA LINK CONNECTOR.
1) Turn ignition switch to OFF.
2) Disconnect VDCCM, and cruise 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:
8 CHECK OUTPUT SIGNAL FOR VDCCM.
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:
9 CHECK HARNESS/CONNECTOR
BETWEEN VDCCM AND DATA LINK CON-
NECTOR.
Measure resistance between VDCCM connec-
tor and data link connector.
Connector & terminal
(F87) No. 11 — (B40) No. 5:
(F87) No. 38 — (B40) No. 4:
Step
Is ignition switch to ON?
Is voltage more than 11 V? Go to step 3.
Is there poor contact at
battery terminal?
Are the name and year of
the system displayed on
the select monitor?
Are the name and year of
the system displayed on
the select monitor?
Are the name and year of
the system displayed on
the select monitor?
Is the resistance more than
1 MΩ?
Is the voltage more than 1
V?
Is the resistance less than
0.5 Ω?
VDC-135
Check Yes
Go to step 2.
Repair or tighten
battery terminal.
Go to step 9.
Go to step 10.
Inspect cruise
control module.
Go to step 8.
Repair harness
and connector
between each
control module
and data link con-
nector.
Repair harness
and connector
between VDCCM
and data link con-
nector.
VDC (Diagnostics)
No
Turn ignition
switch to ON, and
select VDCCM
mode using the
select monitor.
Charge or replace
battery.
Go to step 4.
Go to step 5.
Go to step 6.
Go to step 7.
Repair harness
and connector
between each
control module
and data link con-
nector.
Go to step 9.
Go to step 10.