Subaru Legacy III (2000-2003 year). Manual - part 722

ABS-106

ABS (DIAGNOSTICS)

DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR

O: DTC 37 REAR LEFT INLET VALVE MALFUNCTION

DIAGNOSIS:
• Faulty harness/connector
• Faulty inlet solenoid valve
TROUBLE SYMPTOM:
• ABS does not operate.
WIRING DIAGRAM:

ABS00294

1

23

ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT

F49

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

BATTERY

NO

. 18 15A

SBF-4 50A

SBF-1 100A

GENERATOR

IGNITION 
SWITCH

ABS-107

ABS (DIAGNOSTICS)

DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR

Step

Value

Yes

No

1

CHECK INPUT VOLTAGE OF ABSCM&H/U.
1) Turn ignition switch to OFF.
2) Disconnect connector from ABSCM&H/U.
3) Run the engine at idle.
4) Measure voltage between ABSCM&H/U 

connector and chassis ground.

Connector & terminal

(F49) No. 1 (+) — Chassis ground (

−−−−

):

Is the measured value within the specified 
range?

10 - 15 V

Go to step 2.

Repair harness 
connector 
between battery, 
ignition switch and 
ABSCM&H/U.

2

CHECK GROUND CIRCUIT OF ABSCM&H/U.
1) Turn ignition switch to OFF.
2) Measure resistance between ABSCM&H/U 

connector and chassis ground.

Connector & terminal

(F49) No. 23 — Chassis ground:

Is the measured value less than the speci-
fied value?

0.5 

Ω

Go to step 3.

Repair 
ABSCM&H/U 
ground harness.

3

CHECK POOR CONTACT IN CONNECTORS.
Is there poor contact in connectors between 
generator, battery and ABSCM&H/U?

There is no poor contact.

Go to step 4.

Repair connector.

4

CHECK ABSCM&H/U.
1) Connect all connectors.
2) Erase the memory.
3) Perform inspection mode.
4) Read out the DTC.

Is the same DTC still being output?

Same DTC is not indicated.

Go to step 5.

Replace 
ABSCM&H/U.  
<Ref. to ABS-6, 
ABS Control Mod-
ule and Hydraulic 
Control Unit 
(ABSCM&H/U).> 

5

CHECK ANY OTHER DTC APPEARANCE.
Are other DTC being output?

Other DTC is not indicated.

A temporary poor 
contact.

Proceed with the 
diagnosis corre-
sponding to the 
DTC.

ABS-108

ABS (DIAGNOSTICS)

DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR

P: DTC 32 FRONT RIGHT OUTLET VALVE MALFUNCTION

NOTE:
For the diagnostic procedure, refer to DTC 38. <Ref. to ABS-110, DTC 38 REAR LEFT OUTLET VALVE
MALFUNCTION, Diagnostics Chart with Subaru Select Monitor.>  

Q: DTC 34 FRONT LEFT OUTLET VALVE MALFUNCTION

NOTE:
For the diagnostic procedure, refer to DTC 38. <Ref. to ABS-110, DTC 38 REAR LEFT OUTLET VALVE
MALFUNCTION, Diagnostics Chart with Subaru Select Monitor.>  

R: DTC 36 REAR RIGHT OUTLET VALVE MALFUNCTION

NOTE:
For the diagnostic procedure, refer to DTC 38. <Ref. to ABS-110, DTC 38 REAR LEFT OUTLET VALVE
MALFUNCTION, Diagnostics Chart with Subaru Select Monitor.>  

ABS-109

ABS (DIAGNOSTICS)

DIAGNOSTICS CHART WITH SUBARU SELECT MONITOR

MEMO: