Subaru Legacy IV (2008 year). Manual - part 906

ABS(diag)-23

ABS Warning Light / Brake Warning Light Illumination Pattern

ABS (DIAGNOSTICS)

B: ABS WARNING LIGHT DOES NOT COME ON

DETECTING CONDITION:
• Defective combination meter
• Defective harness
TROUBLE SYMPTOM:
When the ignition switch is turned to ON (engine OFF), ABS warning light does not illuminate.
WIRING DIAGRAM:

MAIN SBF

SBF-6

No.5

No.33

A:

i10

B:

i11

E

E

B301

18

15

22

ABSCM & H/U

A7

8

i3

B38

A3

1 2 3 4 5 6 7 8 9 10 11

16 17 18 19 20 21 22 23 24 25 26

13

12

15

14

i10

2

1

3 4

6 7 8 9 10

22

21

20

19

18

17

16

15

14

13

12

11

5

A:

B301

B38

1

*

20

9

1

*

i11

B:

2

1

3

4 5 6

14

13

12

11

10

9

8

7

ABS01069

1 2 3 4

5 6 7 8 9

10 11 12 13 14 15 16 17 18 19 20

BATTERY

IGNITION
SWITCH

COMBINATION 
METER

: NORMAL METER
  METER WITH MID

REVERSE

CIRCUIT

REVERSE

CIRCUIT

BRAKE

W

ARNING 

LIGHT

ABS

W

ARNING 

LIGHT

: A5
: B5

ABS(diag)-24

ABS Warning Light / Brake Warning Light Illumination Pattern

ABS (DIAGNOSTICS)

Step

Check

Yes

No

1

CHECK ILLUMINATION OF OTHER LIGHTS.
Turn the ignition switch to ON. (engine OFF)

Do other warning lights illumi-
nate?

Go to step 2.

Check the combi-
nation meter.

2

READ DTC.
Read the DTC. <Ref. to ABS(diag)-18, Read 
Diagnostic Trouble Code (DTC).>

Is DTC displayed?

Perform the diag-
nosis according to 
DTC.

Go to step 3.

3

CHECK GROUND SHORT OF HARNESS.
1) Turn the ignition to OFF.
2) Disconnect the connector (B301) from the 
ABSCM&H/U.
3) Disconnect the connector (i10) (Model with 
the normal meter) or (i11) (Model with the meter 
with MID) from the combination meter.
4) Measure the resistance between ABSCM 
connector and chassis ground.

Connector & terminal

(B301) No. 22 — Chassis ground:

Is the resistance 1 M

: or 

more?

Go to step 4.

Repair harness 
and connector 
between 
ABSCM&H/U and 
combination meter.

4

CHECK ABSCM.
1) Connect the connector (B301) to the 
ABSCM&H/U.
2) Turn the ignition to ON.
3) Measure the resistance between the combi-
nation meter connector and chassis ground 
soon after the ignition switch is turned to ON 
(within 1.5 seconds).

Connector & terminal

Model with the normal meter

(i10) No. 5 — Chassis ground:

Model with the meter with MID

(i11) No. 5 — Chassis ground:

Is the resistance 1 M

: or 

more?

Check the combi-
nation meter.

Replace the 
ABSCM only. <Ref. 
to ABS-8, 
REPLACEMENT, 
ABS Control Mod-
ule and Hydraulic 
Control Unit 
(ABSCM&H/U).>

ABS(diag)-25

ABS Warning Light / Brake Warning Light Illumination Pattern

ABS (DIAGNOSTICS)

C: ABS WARNING LIGHT DOES NOT GO OFF

DETECTING CONDITION:
• Defective combination meter
• Open circuit in harness
TROUBLE SYMPTOM:
When starting the engine, the ABS warning light is kept on.
WIRING DIAGRAM:

MAIN SBF

SBF-6

No.5

No.33

A:

i10

B:

i11

E

E

B301

18

15

22

ABSCM & H/U

A7

8

i3

B38

A3

1 2 3 4 5 6 7 8 9 10 11

16 17 18 19 20 21 22 23 24 25 26

13

12

15

14

i10

2

1

3 4

6 7 8 9 10

22

21

20

19

18

17

16

15

14

13

12

11

5

A:

B301

B38

1

*

20

9

1

*

i11

B:

2

1

3

4 5 6

14

13

12

11

10

9

8

7

ABS01069

1 2 3 4

5 6 7 8 9

10 11 12 13 14 15 16 17 18 19 20

BATTERY

IGNITION
SWITCH

COMBINATION 
METER

: NORMAL METER
  METER WITH MID

REVERSE

CIRCUIT

REVERSE

CIRCUIT

BRAKE

W

ARNING 

LIGHT

ABS

W

ARNING 

LIGHT

: A5
: B5

ABS(diag)-26

ABS Warning Light / Brake Warning Light Illumination Pattern

ABS (DIAGNOSTICS)

Step

Check

Yes

No

1

READ DTC.
Read the DTC. <Ref. to ABS(diag)-18, Read 
Diagnostic Trouble Code (DTC).>

Is DTC displayed?

Perform the diag-
nosis according to 
DTC.

Go to step 2.

2

CHECK WIRING HARNESS.
1) Turn the ignition to OFF.
2) Disconnect the connector (B301) from the 
ABSCM&H/U.
3) Disconnect the connector (i10) (Model with 
the normal meter) or (i11) (Model with the meter 
with MID) from the combination meter.
4) Measure the resistance between ABSCM 
connector and combination meter connector.

Connector & terminal

Model with the normal meter

(B301) No. 22 — (i10) No. 5:

Model with the meter with MID

(B301) No. 22 — (i11) No. 5:

Is the resistance less than 0.5 

:? Go to step 3.

Repair harness 
and connector 
between 
ABSCM&H/U and 
combination meter.

3

CHECK POOR CONTACT IN CONNECTOR.
Check for poor contact in all connectors.

Is there poor contact?

Repair the connec-
tor.

Go to step 4.

4

CHECK ABSCM.
1) Connect the connector (B301) to the 
ABSCM&H/U.
2) Turn the ignition switch to ON.
3) Measure the resistance between combina-
tion meter connector and chassis ground.

Connector & terminal

Model with the normal meter

(i10) No. 5 — Chassis ground:

Model with the meter with MID

(i11) No. 5 — Chassis ground:

Is the resistance less than 0.5 

:? Check the combi-

nation meter.

Replace the 
ABSCM only. <Ref. 
to ABS-8, 
REPLACEMENT, 
ABS Control Mod-
ule and Hydraulic 
Control Unit 
(ABSCM&H/U).>