Subaru Legacy 2002 Service Manual page 2331

DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
ABS (Diagnostics)
No.
1 CHECK IF OTHER WARNING LIGHTS
TURN ON.
Turn ignition switch to ON (engine OFF).
2 CHECK ABS WARNING LIGHT BULB.
1) Turn ignition switch to OFF.
2) Remove combination meter.
3) Remove ABS warning light bulb from com-
bination meter.
3 CHECK BATTERY SHORT OF ABS WARN-
ING LIGHT HARNESS.
1) Disconnect connector (B62) from connector
(F45).
2) Measure voltage between connector (B62)
and chassis ground.
Connector & terminal
(B62) No. G6 (+) — Chassis ground (−):
4 CHECK BATTERY SHORT OF ABS WARN-
ING LIGHT HARNESS.
1) Turn ignition switch to ON.
2) Measure voltage between connector (B62)
and chassis ground.
Connector & terminal
(B62) No. G6 (+) — Chassis ground (−):
5 CHECK WIRING HARNESS.
1) Turn ignition switch to OFF.
2) Install ABS warning light bulb from combi-
nation meter.
3) Install combination meter.
4) Turn ignition switch to ON.
5) Measure voltage between connector (B62)
and chassis ground.
Connector & terminal
(B62) No. G6 (+) — Chassis ground (−):
6 CHECK BATTERY SHORT OF ABS WARN-
ING LIGHT HARNESS.
1) Turn ignition switch to OFF.
2) Measure voltage between connector (F45)
and chassis ground.
Connector & terminal
(F45) No. G6 (+) — Chassis ground (−):
7 CHECK BATTERY SHORT OF ABS WARN-
ING LIGHT HARNESS.
1) Turn ignition switch to ON.
2) Measure voltage between connector (F45)
and chassis ground.
Connector & terminal
(F45) No. G6 (+) — Chassis ground (−):
8 CHECK GROUND CIRCUIT OF
ABSCM&H/U.
Measure resistance between ABSCM&H/U
and chassis ground.
Connector & terminal
(F49) No. 23 — GND:
Step
Do other warning lights turn
on?
Is ABS warning light bulb
OK?
Is the voltage less than 3
V?
Is the voltage less than 3
V?
Is the voltage between 10
and 15 V?
Is the voltage less than 3
V?
Is the voltage less than 3
V?
Is the resistance less than
0.5 Ω?
ABS-30
Check Yes
Go to step 2.
Go to step 3.
Go to step 4.
Go to step 5.
Go to step 6.
Go to step 7.
Go to step 8.
Go to step 9.
No
Repair combina-
tion meter. <Ref.
to IDI-15, Combi-
nation Meter
Assembly.>
Replace ABS
warning light bulb.
<Ref. to IDI-15,
Combination
Meter Assembly.>
Repair warning
light harness.
Repair warning
light harness.
Repair wiring har-
ness.
Repair wiring har-
ness.
Repair wiring har-
ness.
Repair
ABSCM&H/U
ground harness.