Subaru Legacy III (2000-2003 year). 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.

Go to step 9.

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.

Go to step 10.

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

Go to step 11.

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

Go to step 12.

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.

Go to step 2.

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.

Go to step 3.

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

Go to step 4.

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

Go to step 5.

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

Go to step 6.

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