1997 SUBARU LEGACY fuse

B4M0880B
10AC8CHECK BATTERY SHORT OF SOLENOID
VA LV E .
1) Disconnect connector (ABS1, F9) from hydraulic unit.
2) Turn ignition switch to ON.
3) Measure voltage between hydraulic unit connector and
chassis ground.
: Connector & terminal
To (F63) No. 4 (+)—Chassis ground ()
Is voltage 0 V?
: Go to next step.
: Replace hydraulic unit and check all fuses.
4) Turn ignition switch to OFF.
5) Measure voltage between hydraulic unit connector and
chassis ground.
: Connector & terminal
To (F63) No. 4 (+)—Chassis ground ()
Is voltage 0 V?
: Go to step10AC9.
: Replace hydraulic unit and check all fuses.
B4M0881A
10AC9
CHECK BATTERY SHORT OF HARNESS.
1) Disconnect connector from hydraulic unit.
2) Turn ignition switch to ON.
3) Measure voltage between ABSCM connector and chas-
sis ground.
: Connector & terminal
(F49) No. 30 (+)—Chassis ground ()
(F49) No. 24 (+)—Chassis ground ()
(F49) No. 23 (+)—Chassis ground ()
(F49) No. 31 (+)—Chassis ground ()
(F49) No. 3 (+)—Chassis ground ()
(F49) No. 51 (+)—Chassis ground ()
(F49) No. 50 (+)—Chassis ground ()
(F49) No. 4 (+)—Chassis ground ()
Is voltage 0 V?
: Go to next step.
: Repair harness between hydraulic unit and
ABSCM and check all fuses.
221
4-4cBRAKES [ABS 5.3 TYPE]
10. Diagnostics Chart with Select Monitor

4) Turn ignition switch to OFF.
5) Measure voltage between ABSCM connector and chas-
sis ground.
: Connector & terminal
(F49) No. 30 (+)—Chassis ground ()
(F49) No. 24 (+)—Chassis ground ()
(F49) No. 23 (+)—Chassis ground ()
(F49) No. 31 (+)—Chassis ground ()
(F49) No. 3 (+)—Chassis ground ()
(F49) No. 51 (+)—Chassis ground ()
(F49) No. 50 (+)—Chassis ground ()
(F49) No. 4 (+)—Chassis ground ()
Is voltage 0 V?
: Go to step10AC10.
: Repair harness between hydraulic unit and
ABSCM and check all fuses.
10AC10CHECK POOR CONTACT IN CONNEC-
TOR BETWEEN ABSCM AND HYDRAU-
LIC UNIT.
: Is there poor contact in connector between
ABSCM and hydraulic unit?
: Repair connector.
: Go to step10AC11.
10AC11
CHECK ABSCM.
1) Connect all connectors.
2) Erase the memory.
3) Perform inspection mode.
4) Read out the trouble code.
: Is the same trouble code as in the current
diagnosis still being output?
: Replace ABSCM.
: Go to next.
: Are other trouble codes being output?
: Proceed with the diagnosis corresponding to the
trouble code.
: A temporary poor contact.
222
4-4cBRAKES [ABS 5.3 TYPE]
10. Diagnostics Chart with Select Monitor

B4M0890B
10AD4CHECK INPUT VOLTAGE OF RELAY
BOX.
1) Disconnect connector (F8) from relay box.
2) Measure voltage between relay box connector and
chassis ground.
: Connector & terminal
(F8) No. 2 (+)—Chassis ground ()
Is voltage 10—13 V?
: Go to step10AD5.
: Repair harness connector between battery and
relay box. Check fuse SBF6.
B4M0891
10AD5CHECK INPUT VOLTAGE OF MOTOR
RELAY.
1) Connect connector (F8) to relay box.
2) Measure voltage between relay box and chassis
ground.
: Connector & terminal
Relay installing point No. 87 (+)—Chassis
ground ()
Is voltage 10—13 V?
: Go to step10AD6.
: Replace relay box and fuse SBF6.
227
4-4cBRAKES [ABS 5.3 TYPE]
10. Diagnostics Chart with Select Monitor

B4M0892A
10AD6CHECK BROKEN WIRE IN CONTACT
POINT CIRCUIT OF RELAY BOX.
1) Disconnect connector (ABS1) from hydraulic unit.
2) Measure resistance between hydraulic unit and motor
relay installing portion.
: Connector & terminal
(ABS1) No. 1—Motor relay installing por-
tion No. 30
Is resistance less than 0.5Ω?
: Go to step10AD7.
: Replace relay box.
B4M0893A
10AD7CHECK GROUND SHORT IN CONTACT
POINT CIRCUIT OF RELAY BOX.
Measure resistance between hydraulic unit and chassis
ground.
: Connector & terminal
(ABS1) No. 1—Chassis ground
Is resistance more than 1 MΩ?
: Go to step10AD8.
: Replace relay box. Check fuse No. 19.
B4M0795B
10AD8CHECK BROKEN WIRE IN MONITOR
SYSTEM CIRCUIT OF RELAY BOX.
1) Disconnect connector (F50) from relay box.
2) Measure resistance between relay box connector and
motor relay installing point.
: Connector & terminal
To (F50) No. 6—Motor relay installing point
No. 30
Is resistance less than 0.5Ω?
: Go to step10AD9.
: Replace relay box.
228
4-4cBRAKES [ABS 5.3 TYPE]
10. Diagnostics Chart with Select Monitor

B4M0894
10AD9CHECK BROKEN WIRE IN CONTROL
CIRCUIT OF RELAY BOX.
1) Remove valve relay from relay box.
2) Measure resistance between motor relay installing point
and valve relay installing point.
: Connector & terminal
Motor relay installing point No. 86—Valve
relay installing point No. 30
Is resistance less than 0.5Ω?
: Go to next step.
: Replace relay box.
B4M0895B
3) Measure resistance between motor relay installing point
and relay box connector.
: Connector & terminal
Motor relay installing point No. 86—To
(F50) No. 4
Is resistance less than 0.5Ω?
: Go to step10AD10.
: Replace relay box.
B4M0896
10AD10CHECK GROUND SHORT IN CONTROL
CIRCUIT OF RELAY BOX.
Measure resistance between relay box and chassis
ground.
: Connector & terminal
Motor relay installing point No. 86—Chas-
sis ground
Motor relay installing point No. 85—Chas-
sis ground
Is resistance more than 1 MΩ?
: Go to step10AD11.
: Replace relay box. Check fuse No. 19.
229
4-4cBRAKES [ABS 5.3 TYPE]
10. Diagnostics Chart with Select Monitor

B4M0897
10AD11CHECK BATTERY SHORT IN CONTROL
CIRCUIT OF RELAY BOX.
1) Disconnect connector from ABSCM.
2) Turn ignition switch to ON.
3) Measure voltage between motor relay installing point
and chassis ground.
: Connector & terminal
Motor relay installing point No. 85 (+)—
Chassis ground ()
Motor relay installing point No. 86 (+)—
Chassis ground ().
Is voltage 0 V?
: Go to next step.
: Replace relay box and check all fuses.
4) Turn ignition switch to OFF.
5) Measure voltage between motor relay installing point
and chassis ground.
: Connector & terminal
Motor relay installing point No. 85 (+)—
Chassis ground
Motor relay installing point No. 86 (+)—
Chassis ground ()
Is voltage 0 V?
: Go to step10AD12.
: Replace relay box and check all fuses.
B4M0898B
10AD12CHECK BROKEN WIRE IN MONITOR
SYSTEM HARNESS.
1) Connect between terminals No. 10 and No. 1 of
ABSCM connector (F49) with a lead wire.
2) Measure resistance between relay box connector and
chassis ground.
: Connector & terminal
(F50) No. 6—Chassis ground
Is resistance less than 0.5Ω?
: Go to step10AD13.
: Repair harness connector between ABSCM and
relay box.
230
4-4cBRAKES [ABS 5.3 TYPE]
10. Diagnostics Chart with Select Monitor

B4M0899A
10AD13CHECK BROKEN WIRE IN RELAY CON-
TROL SYSTEM HARNESS.
1) Connect valve relay and motor relay to relay box.
2) Connect connector (F50) to relay box.
3) Connect connector to hydraulic unit.
4) Measure resistance between ABSCM connector and
chassis ground.
: Connector & terminal
(F49) No. 22—Chassis ground
Is resistance 80±10Ω?
: Go to step10AD14.
: Repair harness connector between ABSCM and
relay box.
B4M0900A
10AD14CHECK GROUND SHORT BETWEEN
RELAY BOX AND ABSCM.
1) Disconnect connector (F50) from relay box.
2) Measure resistance between ABSCM connector and
chassis ground.
: Connector & terminal
(F49) No. 22—Chassis ground
(F49) No. 10—Chassis ground
Is resistance more than 1 MΩ?
: Go to step10AD15.
: Repair harness between ABSCM and relay box.
Check fuse No. 19 and SBF6.
231
4-4cBRAKES [ABS 5.3 TYPE]
10. Diagnostics Chart with Select Monitor

B4M0901A
10AD15CHECK BATTERY SHORT BETWEEN
RELAY BOX AND ABSCM.
1) Turn ignition switch to ON.
2) Measure voltage between ABSCM and chassis ground.
: Connector & terminal
(F49) No. 22 (+)—Chassis ground ()
(F49) No. 10 (+)—Chassis ground ()
Is voltage 0 V?
: Go to next step.
: Repair harness between relay box and ABSCM.
Check fuse SBF6.
3) Turn ignition switch to OFF.
4) Measure voltage between ABSCM and chassis ground.
: Connector & terminal
(F49) No. 22 (+)—Chassis ground ()
(F49) No. 10 (+)—Chassis ground ()
Is voltage 0 V?
: Go to step10AD16.
: Repair harness between relay box and ABSCM.
Check fuse SBF6.
B4M0902A
10AD16CHECK GROUND SHORT AT ABSCM
MONITOR TERMINAL.
Measure resistance between ABSCM terminals.
: Connector & terminal
To (F49) No. 10—No. 1
Is resistance more than 1 MΩ?
: Go to step10AD17.
: Replace ABSCM.
B4M0904A
10AD17CHECK ABSCM MOTOR DRIVE TERMI-
NAL.
1) Disconnect connector cover from ABSCM connector.

2) Connect all connectors.
3) Measure voltage between ABSCM connector terminals.
4) Operate the check sequence.
: Connector & terminals
(F49) No. 22 (+)—No.1()
Does the voltage drop from 10—13Vto
less than 1.5 V, and rise to 10—13 V again
when carrying out the check sequence?
: Go to step10AD18.
: Replace ABSCM.
232
4-4cBRAKES [ABS 5.3 TYPE]
10. Diagnostics Chart with Select Monitor