Subaru Legacy 2002 Service Manual page 2386

DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR
No.
9 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 (−):
10 CHECK HARNESS/CONNECTOR
BETWEEN ABSCM&H/U AND DATA LINK
CONNECTOR.
Measure resistance between ABSCM&H/U
connector and data link connector.
Connector & terminal
(F49) No. 20 — (B40) No. 5:
(F49) No. 5 — (B40) No. 4:
11 CHECK INSTALLATION OF ABSCM&H/U
CONNECTOR.
Turn ignition switch to OFF.
12 CHECK POWER SUPPLY CIRCUIT.
1) Turn ignition switch to ON (engine OFF).
2) Measure ignition power supply voltage
between ABSCM&H/U connector and chassis
ground.
Connector & terminal
(F49) No. 1 (+) — Chassis ground (−):
13 CHECK HARNESS CONNECTOR
BETWEEN ABSCM&H/U AND CHASSIS
GROUND.
1) Turn ignition switch to OFF.
2) Disconnect connector from ABSCM&H/U
and transmission.
3) Measure resistance of harness between
ABSCM&H/U and chassis ground.
Connector & terminal
(F49) No. 23 — Chassis ground:
14 CHECK POOR CONTACT IN CONNEC-
TORS.
Step
Is the voltage more than 1
V?
Is the resistance less than
0.5 Ω?
Is ABSCM&H/U connector
inserted into ABSCM&H/U
until the clamp locks onto
it?
Is the voltage more than 10
V?
Is the resistance less than
1 Ω?
Is there poor contact in
control module power
supply, ground line and
data link connector?
ABS-85
Check Yes
Repair harness
and connector
between each
control module
and data link con-
nector.
Repair harness
and connector
between
ABSCM&H/U and
data link connec-
tor.
Go to step 12.
Go to step 13.
Go to step 14.
Repair connector.
ABS (Diagnostics)
No
Go to step 10.
Go to step 11.
Insert
ABSCM&H/U con-
nector into
ABSCM&H/U.
Repair open cir-
cuit in harness
between
ABSCM&H/U and
battery.
Repair open cir-
cuit in harness
between
ABSCM&H/U and
inhibitor side
connector, and
poor contact in
coupling connec-
tor.
Replace
ABSCM&H/U.
<Ref. to ABS-6,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>