Subaru Legacy III (2000-2003 year). Service manual — part 716
ABS-82
ABS (DIAGNOSTICS)
DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR
8
CHECK HARNESS/CONNECTOR BETWEEN
ABSCM&H/U AND DATA LINK CONNEC-
TOR.
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:
Is the measured value less than the specified
value?
0.5
Ω
Repair harness
and connector
between
ABSCM&H/U and
data link connec-
tor.
9
CHECK INSTALLATION OF ABSCM&H/U
CONNECTOR.
Turn ignition switch to OFF.
Is ABSCM&H/U connector inserted into
ABSCM&H/U until the clamp locks onto it?
ABSCM&HU connector
inserted securely.
Insert ABSCM&H/
U connector into
ABSCM&H/U.
10
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 (
−−−−
):
Does the measured value exceed the spec-
ified value?
10 V
Repair open circuit
in harness
between
ABSCM&H/U and
battery.
11
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:
Is the measured value less than the speci-
fied value?
1
Ω
Repair open circuit
in harness
between
ABSCM&H/U and
inhibitor side con-
nector, and poor
contact in cou-
pling connector.
12
CHECK POOR CONTACT IN CONNECTORS.
Is there poor contact in control module power
supply, ground line and data link connector?
There is no poor contact.
Replace
ABSCM&H/U.
<Ref. to ABS-6,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
Repair connector.
Step
Value
Yes
No
ABS-83
ABS (DIAGNOSTICS)
DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR
B: NO TROUBLE CODE
DIAGNOSIS:
• ABS warning light circuit is shorted.
TROUBLE SYMPTOM:
• ABS warning light remains on.
• NO TROUBLE CODE displayed on the select monitor.
NOTE:
When the ABS warning light is OFF and “NO TROUBLE CODE” is displayed on the select monitor, the sys-
tem is in normal condition.
ABS-84
ABS (DIAGNOSTICS)
DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR
WIRING DIAGRAM:
Step
Value
Yes
No
1
CHECK WIRING HARNESS.
1) Turn ignition switch to OFF.
2) Disconnect connector (F45) or (F2) from
connector (B62) or (B100).
3) Turn ignition switch to ON.
Does the ABS warning light turn on?
ABS warning light does not
turn on.
Repair front wiring
harness.
ABS00308
24
1
23
5
4
18
20
22
4
ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT
F49
B82
B81
8
DIAGNOSIS
TERMINAL
DIAGNOSIS
CONNECTOR
B36
B4 B5 B6
A4 A5 A6
C5 C6
F6
D4 D5 D6
F1
H1
C4
G6
G1
C2
K1
M1 M2
K6
L1
D1 D2
A1 A2
B1 B2
I6
J6
L2
I1
J1
H6
M4 M5 M6
L4 L5 L6
N5 N6
O4 O5 O6
N4
P4 P5
N2
O1 O2
P1 P2
N3
O3
P3
P6
A3
B3
C3
E4 E5 E6
E1 E2
i10
1 2 3 4 5 6 7
8 9 10 11 12 13 14
15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
16 17 18 19 20 21 22
27 28 29 30 31
23
24
25
26
F49
B82
1 2
4 5 6 7
3
8
i12
1 2 3
4 5 6
7 8 9 10 11 12 13 14
NO
. 8 30A
NO
. 18 15A
BATTERY
SBF-1 100A
SBF-3 50A
SBF-4 50A
IGNITION
SWITCH
COMBINATION
METER
ABS
WARNING
LIGHT
B:
i11
C:
i12
A:
i10
G1
i1
B36
GENERATOR
B5
IGNITION
RELAY
NO
. 5 15A
F45
1 2 3
4 5 6 7
8 9 10 11
12 13 14 15 16
TB
1
*
2
*
3
*
4
*
RHD
LHD
1
*
2
*
3
*
:TURBO A8
NA C3
: LHD
RHD
: TURBO B2
NA C11
: TURBO
ENGINE
MODEL
4
*
: LHD
RHD
TB
F2
F45
B100
B62
1 2 3
8 9 10
4
11 12 13 14 15 16
5 6 7
B:
i11
F2
3 4
1 2
8 9 10 11
12 13 14 15 16 17 18 19 20 21 22 23 24
5 6
7
ABS-85
ABS (DIAGNOSTICS)
DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR
2
CHECK PROJECTION AT ABSCM&H/U.
1) Turn ignition switch to OFF.
2) Disconnect connector from ABSCM&H/U.
3) Check for broken projection at the
ABSCM&H/U terminal.
Is there any damage on ABSCM&HU termi-
nal?
There is no damage on termi-
nal.
Replace
ABSCM&H/U.
<Ref. to ABS-6,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
3
CHECK ABSCM&H/U.
Measure resistance between ABSCM&H/U ter-
minals.
Terminals
No. 22 — No. 23:
Does the measured value exceed the specified
value?
1 M
Ω
Replace
ABSCM&H/U.
<Ref. to ABS-6,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
4
CHECK WIRING HARNESS.
Measure resistance between connector (F45)
or (F2) and chassis ground.
Connector & terminal
LHD: (F45) No. 5 — Chassis ground:
RHD: (F2) No. 18 — Chassis ground:
Is the measured value less than the specified
value?
0.5
Ω
Repair harness.
5
CHECK WIRING HARNESS.
1) Connect connector to ABSCM&H/U.
2) Measure resistance between connector
(F45) or (F2) and chassis ground.
Connector & terminal
LHD: (F45) No. 5 — Chassis ground:
RHD: (F2) No. 18 — Chassis ground:
Does the measured value exceed the spec-
ified value?
1 M
Ω
Repair harness.
6
CHECK POOR CONTACT IN ABSCM&H/U
CONNECTOR.
Is there poor contact in ABSCM&H/U connec-
tor?
There is no poor contact.
Replace
ABSCM&H/U.
<Ref. to ABS-6,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
Repair connector.
Step
Value
Yes
No
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