1997 SUBARU LEGACY ignition

B4M1261A
8Y4CHECK OPEN CIRCUIT IN G SENSOR
OUTPUT HARNESS AND GROUND HAR-
NESS.
1) Turn ignition switch to OFF.
2) Disconnect connector from ABSCM&H/U.
3) Measure resistance between ABSCM&H/U connector
terminals.
Connector & terminal
(F49) No. 30—No. 28:
: Is the resistance between 4.3 and 4.9 kΩ?
: Go to step8Y5.
: Repair harness/connector between G sensor and
ABSCM&H/U.
B4M1262A
8Y5CHECK GROUND SHORT IN G SENSOR
OUTPUT HARNESS.
1) Disconnect connector from G sensor.
2) Measure resistance between ABSCM&H/U connector
and chassis ground.
Connector & terminal
(F49) No. 6—Chassis ground:
: Is the resistance more than 1 MΩ?
: Go to step8Y6.
: Repair harness between G sensor and
ABSCM&H/U.
B4M1263A
8Y6
CHECK BATTERY SHORT OF HARNESS.
Measure voltage between ABSCM&H/U connector and
chassis ground.
Connector & terminal
(F49) No. 6 (+)—Chassis ground ():
: Is the voltage less than 1 V?
: Go to step8Y7.
: Repair harness between G sensor and
ABSCM&H/U.
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4-4dBRAKES [ABS 5.3i TYPE]
8. Diagnostics Chart with Trouble Code by ABS Warning Light

B4M1263A
8Y7
CHECK BATTERY SHORT OF HARNESS.
1) Turn ignition switch to ON.
2) Measure voltage between ABSCM&H/U connector and
chassis ground.
Connector & terminal
(F49) No. 6 (+)—Chassis ground ():
: Is the voltage less than 1 V?
: Go to step8Y8.
: Repair harness between G sensor and
ABSCM&H/U.
B4M1264A
8Y8
CHECK GROUND SHORT OF HARNESS.
Measure resistance between ABSCM&H/U connector and
chassis ground.
Connector & terminal
(F49) No. 28—Chassis ground:
: Is the resistance more than 1 MΩ?
: Go to step8Y9.
: Repair harness between G sensor and
ABSCM&H/U.
Replace ABSCM&H/U.
75
4-4dBRAKES [ABS 5.3i TYPE]
8. Diagnostics Chart with Trouble Code by ABS Warning Light

B4M0915
8Y9
CHECK G SENSOR.
1) Turn ignition switch to OFF.
2) Remove G sensor from vehicle.
3) Connect connector to G sensor.
4) Connect connector to ABSCM&H/U.
5) Turn ignition switch to ON.
6) Measure voltage between G sensor connector termi-
nals.
Connector & terminal
(P11) No. 2 (+)—No.1():
: Is the voltage between 2.1 and 2.4 V when G
sensor is horizontal?
: Go to step8Y10.
: Replace G sensor.
B4M0917A
8Y10
CHECK G SENSOR.
Measure voltage between G sensor connector terminals.
Connector & terminal
(P11) No. 2 (+)—No.1():
: Is the voltage between 3.7 and 4.1 V when G
sensor is inclined forwards to 90°?
: Go to step8Y11.
: Replace G sensor.
B4M0918A
8Y11
CHECK G SENSOR.
Measure voltage between G sensor connector terminals.
Connector & terminal
(P11) No. 2 (+)—No.1():
: Is the voltage between 0.5 and 0.9 V when G
sensor is inclined backwards to 90°?
: Go to step8Y12.
: Replace G sensor.
8Y12CHECK POOR CONTACT IN CONNEC-
TORS.
: Is there poor contact in connector between
ABSCM&H/U and G sensor? WORD [T3C1].>
: Repair connector.
: Go to step8Z12.
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4-4dBRAKES [ABS 5.3i TYPE]
8. Diagnostics Chart with Trouble Code by ABS Warning Light

H4M1117
B: MODE F00
—ROM ID NUMBER (ROM)—
CONDITION:
Ignition switch ON
SPECIFIED DATA:
Presentation display
9B1
CHECK MESSAGE OF DISPLAY.
: Does display indicate message“Error 1”?
: Repair loose or disconnect connector, or discon-
tinued circuit in data link circuit.
: Go to step9B2.
9B2
CHECK MESSAGE OF DISPLAY.
: Does display indicate message“Error 2”?
: Repair poor contact of select monitor cartridge, or
installation of different type select monitor car-
tridge.
: Data link system is normal.
B4M0922
C: MODE F01 AND F05
—FRONT RIGHT WHEEL SPEED SIGNAL
(FR)—

Compare speedometer with monitor indications.

F01: FR wheel speed is indicated in mile per hour (mile/
h).

F05: FR wheel speed is indicated in kilometer per hour
(km/h).
NOTE:
The monitor as shown, indicates that FR wheel speed is 30
km/h.
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4-4dBRAKES [ABS 5.3i TYPE]
9. Select Monitor Function Mode

B4M0930
J: MODE FC0
—HISTORY OF TROUBLE CODES IS
ERASED (D⋅CLR)—

Deletes the recorded trouble codes in ABS control mod-
ule.
B4M0931
1) Press the function key [F] [C] [O] [ENT] in that order.
B4M0930
2) System indicates as shown.
B4M0933
3) Press the function key [0], to clear memories. The indi-
cation of
is added to screen.
B4M0934
4) Press the function key [ENT]. System indicates as
shown.
5) Turn ignition switch to OFF.
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4-4dBRAKES [ABS 5.3i TYPE]
9. Select Monitor Function Mode

B4M0430
10C1
CHECK GENERATOR.
1) Start the engine.
2) Idle the engine.
3) Measure voltage between generator and chassis
ground.
Terminal
Generator B terminal (+)—Chassis ground ():
: Is the voltage between 10 and 15 V?
: Go to step10C2.
: Repair generator.
10C2
CHECK BATTERY TERMINAL.
Turn ignition switch to OFF.
: Is there poor contact at battery terminal?
: Repair battery terminal.
: Go to step10C3.
10C3CHECK COMMUNICATION OF SELECT
MONITOR.
Using the select monitor, check whether communication to
other system (such as engine, AT, etc.) can be executed
normally.
: Are the name and year of the system dis-
played on the select monitor?
: Go to step10C4.
: Repair select monitor communication cable and
connector.
10C4CHECK 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?
: Go to step10C5.
: Insert ABSCM&H/U connector into ABSCM&H/U
until the clamp locks onto it.
93
4-4dBRAKES [ABS 5.3i TYPE]
10. Diagnostics Chart with Select Monitor

B4M1234A
10C5CHECK POWER SUPPLY OF
ABSCM&H/U.
1) Disconnect connector from ABSCM&H/U.
2) Start engine.
3) Idle the engine.
4) Measure voltage between ABSCM&H/U connector and
chassis ground.
Connector & terminal
(F49) No. 1 (+)—Chassis ground ():
: Is the voltage between 10 and 15 V?
: Go to step10C6.
: Repair ABSCM&H/U power supply circuit.
B4M1243A
10C6CHECK 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 resistance less than 0.5Ω?
: Repair harness/connector between ABSCM&H/U
and select monitor.
: Go to step10C7.
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4-4dBRAKES [ABS 5.3i TYPE]
10. Diagnostics Chart with Select Monitor

B4M1267A
10C7CHECK HARNESS/CONNECTOR
BETWEEN ABSCM&H/U AND DATA LINK
CONNECTOR.
1) Turn ignition switch OFF.
2) Measure resistance between ABSCM&H/U connector
and data link connector.
Connector & terminal
(F49) No. 20—(B78) No. 3:
(F49) No. 5—(B78) No. 2:
: Is the resistance less than 0.5Ω?
: Repair harness and connector between
ABSCM&H/U and data link connector.
: Go to step10C8.
10C8CHECK POOR CONTACT IN CONNEC-
TORS.
: Is there poor contact in connectors between
ABSCM&H/U and data link connector? to FOREWORD [T3C1].>
: Repair connector.
: Replace ABSCM&H/U.
95
4-4dBRAKES [ABS 5.3i TYPE]
10. Diagnostics Chart with Select Monitor