1997 SUBARU LEGACY light

WIRING DIAGRAM:
B4M1041
8M1
CHECK IF STOP LIGHTS COME ON.
Depress the brake pedal.
: Do stop lights turn on?
: Go to step8M2.
: Repair stop lights circuit.
103
4-4cBRAKES [ABS 5.3 TYPE]
8. Diagnostics Chart with Trouble Code

B4M0908A
8M2
CHECK OPEN CIRCUIT OF HARNESS.
1) Turn ignition switch to OFF.
2) Disconnect connector from ABSCM.
3) Depress brake pedal.
4) Measure voltage between ABSCM connector and chas-
sis ground.
: Connector & terminal
(F49) No. 36—Chassis ground
Is voltage 10—13 V?
: Go to step8M3.
: Repair harness between stop light switch and
ABSCM.
8M3CHECK POOR CONTACT IN CONNEC-
TOR BETWEEN STOP LIGHT SWITCH
AND ABSCM.
: Is there poor contact in connector between
stop light switch and ABSCM?
: Repair connector.
: Go to step8M4.
8M4
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.
104
4-4cBRAKES [ABS 5.3 TYPE]
8. Diagnostics Chart with Trouble Code

G2M0096
9. Select Monitor Function Mode
Applicable cartridge of select monitor: No. 498345700
A: LIST OF FUNCTION MODE
1. F MODE (ROM ID, ANALOG DATA ARE
DISPLAYED.)
Function code
Measuring items Contents to be monitored Scroll Ref. to
Code Abbreviation
F00 ROM ID ECM identificationROM ID number of ECM is read and enabled commu-
nication state is displayed.Possible 4-4c [T9B0]
F01 FRFR wheel speed
(mile/h)Wheel speed detected by the FR ABS sensor is dis-
played in mile/h.Possible 4-4c [T9C0]
F02 FLFL wheel speed
(mile/h)Wheel speed detected by the FL ABS sensor is dis-
played in mile/h.Possible 4-4c [T9D0]
F03 RRRR wheel speed
(mile/h)Wheel speed detected by the RR ABS sensor is dis-
played in mile/h.Possible 4-4c [T9E0]
F04 RLRL wheel speed
(mile/h)Wheel speed detected by the RL ABS sensor is dis-
played in mile/h.Possible 4-4c [T9F0]
F05 FRFR wheel speed
(km/h)Wheel speed detected by the FR ABS sensor is dis-
played in km/h.Possible 4-4c [T9C0]
F06 FLFL wheel speed
(km/h)Wheel speed detected by the FL ABS sensor is dis-
played in km/h.Possible 4-4c [T9D0]
F07 RRRR wheel speed
(km/h)Wheel speed detected by the RR ABS sensor is dis-
played in km/h.Possible 4-4c [T9E0]
F08 RLRL wheel speed
(km/h)Wheel speed detected by the RL ABS sensor is dis-
played in km/h.Possible 4-4c [T9F0]
F09 BLSStop light switch
monitorStop light switch monitor voltage is displayed. Possible 4-4c [T9G0]
F10 G-SENSG sensor output volt-
age (V)Refers to vehicle acceleration detecting by the analog
G sensor. It appears on the select monitor display in
volts.Possible4-4c [T9H0]
111
4-4cBRAKES [ABS 5.3 TYPE]
9. Select Monitor Function Mode

2. FA MODE (ON/OFF DATA ARE DISPLAYED.)
Function code
Measuring items Contents to be monitored Scroll Ref. to
Code Abbreviation
FA 0B1 Stop light switchLED 1 comes on with the switch on (with the brake
pedal down).
Possible 4-4c [T9I0] VR Valve relay signal LED 2 comes on with the valve relay off.
MR Motor relay signal LED 3 comes on with the motor on.
AT AT ABS signal LED 4 comes on when ABS control is on.
AW ABS warning light LED 6 comes on when the warning light is on.
VM Valve relay monitor LED 1 comes on with the valve relay off.
MM Motor relay monitor LED 8 comes on when the motor relay is on.
CM CCM signal LED 9 comes on when ABS control is on.
3. FB MODE (TROUBLE CODES ARE DISPLAYED.)
Function code
Measuring items Contents to be monitored Scroll Ref. to
Code Abbreviation
FB1D⋅ALL
History of trouble
codes is displayed.A maximum of 3 trouble codes are displayed in order
of occurrence.
Possible 4-4c [T10B0] D⋅NEWThe most recent trouble code appears on the select
monitor display.
D⋅MIDThe second most recent trouble code appears on the
select monitor display.
D⋅OLDThe third most recent trouble code appears on the
select monitor display.
B4M0919
NOTE:

If a particular trouble code is not properly stored in
memory (due to a drop in ABSCM power supply, etc.) when
a problem occurs, the trouble code, followed by a question
mark“?”, appears on the select monitor display. This shows
it may be an unreliable reading.

*a* refers to the troubles in order of occurrence (NEW.
MID and OLD).
11 2
4-4cBRAKES [ABS 5.3 TYPE]
9. Select Monitor Function Mode

4. FC MODE (TROUBLE CODES AND FREEZE
FRAME DATA ARE ERASED.)
Function code
Measuring items Contents to be monitored Scroll Ref. to
Code Abbreviation
FC0 D⋅CLRHistory of trouble
codes is erased.Function of clearing trouble code. Possible 4-4c [T9J0]
5. FD MODE (ABS SEQUENCE CHECK MODE)
Function code
Measuring items Contents to be monitored Scroll Ref. to
Code Abbreviation
FD1 A⋅CHKABS sequence con-
trolPerform ABS sequence control by operating valve and
pump motor sequentially.Impossible4-4
[W20D0]
6. FE MODE (FREEZE FRAME DATA)
NOTE:
Data stored at the time of trouble occurrence is shown on
display.
Function code
Measuring items Contents to be monitored Scroll Ref. to
Code Abbreviation
FE1 FR FR wheel speed (mile/h)Wheel speed detected by the FR ABS sensor is displayed in
mile/h.Possible 4-4c [T9K0]
FE2 FL FL wheel speed (mile/h)Wheel speed detected by the FL ABS sensor is displayed in
mile/h.Possible 4-4c [T9L0]
FE3 RR RR wheel speed (mile/h)Wheel speed detected by the RR ABS sensor is displayed in
mile/h.Possible 4-4c [T9M0]
FE4 RL RL wheel speed (mile/h)Wheel speed detected by the RL ABS sensor is displayed in
mile/h.Possible 4-4c [T9N0]
FE5 FR FR wheel speed (km/h)Wheel speed detected by the FR ABS sensor is displayed in
km/h.Possible 4-4c [T9K0]
FE6 FL FL wheel speed (km/h)Wheel speed detected by the FL ABS sensor is displayed in
km/h.Possible 4-4c [T9L0]
FE7 RR RR wheel speed (km/h)Wheel speed detected by the RR ABS sensor is displayed in
km/h.Possible 4-4c [T9M0]
FE8 RL RL wheel speed (km/h)Wheel speed detected by the RL ABS sensor is displayed in
km/h.Possible 4-4c [T9N0]
FE13 POWERABSCM power supply
voltage (V)Power (in volts) supplied to ABSCM appears on the select
monitor display.Possible 4-4c [T9O0]
FE14 G-SENSG sensor output voltage
(V)Refers to vehicle acceleration detected by the analog G sen-
sor. It appears on the select monitor display in volts.Possible 4-4c [T9P0]
FE15MM Motor relay monitor LED 1 comes on when motor relay is on.
Possible 4-4c [T9Q0] B1 Stop light switchLED 2 comes on with the stop light switch on (with the brake
pedal depressed).
AT AT ABS signal LED 3 comes on when ABS control is on.
CM CCM signal LED 4 comes on when ABS control is on.
A0 ABS control LED 5 comes on when ABS control is on.
11 3
4-4cBRAKES [ABS 5.3 TYPE]
9. Select Monitor Function Mode

B4M0924
E: MODE F03 AND F07
—REAR RIGHT WHEEL SPEED SIGNAL
(RR)—

Compare speedometer with monitor indications.

F03: RR wheel speed is indicated in mile per hour (mile/
h).

F07: RR wheel speed is indicated in kilometer per hour
(km/h).
NOTE:
The monitor as shown, indicates that RR wheel speed is 10
km/h.
B4M0925
F: MODE F04 AND F08
—REAR LEFT WHEEL SPEED SIGNAL (RL)
—

Compare speedometer with monitor indications.

F04: RL wheel speed is indicated in mile per hour (mile/
h).

F08: RL wheel speed is indicated in kilometer per hour
(km/h).
NOTE:
The monitor as shown, indicates that RL wheel speed is 50
km/h.
B4M0926
G: MODE F09
—STOP LIGHT SWITCH MONITOR (BLS)—

Stop light switch monitor voltage is displayed.
11 6
4-4cBRAKES [ABS 5.3 TYPE]
9. Select Monitor Function Mode

B4M0927
H: MODE F10
—G SENSOR OUTPUT VOLTAGE (G-SENS)
—

Refers to vehicle acceleration detecting by the analog G
sensor. It appears on the select monitor display in volts.
NOTE:
Only AWD model
LED No. Signal name Display
1 Stop light switch B1
2 Valve relay signal VR
3 Motor relay signal MR
4 AT ABS signal AT
5——
6 ABS warning light AW
7 Valve relay monitor VM
8 Motor relay monitor MM
9 CCM signal CM
10——
B1 VR MR AT—
AW VM MM CM—
1
2345
678910
I: MODE FA0
—ON↔OFF SIGNAL—
Requirement for LED“ON”
LED No. 1 Stop light switch is turned ON. (With brake
pedal depressed.)
LED No. 2 Valve relay is turned OFF.
LED No. 3 Motor relay is turned ON.
LED No. 4 ABS control operates.
LED No. 6 ABS warning light is ON.
LED No. 7 Valve relay is turned OFF.
LED No. 8 Motor relay is turned ON.
LED No. 9 ABS control operates.
11 7
4-4cBRAKES [ABS 5.3 TYPE]
9. Select Monitor Function Mode

B4M0939
P: MODE FE14
—G SENSOR OUTPUT VOLTAGE (G-SENS)
—

Refers to vehicle acceleration detected by the analog G
sensor at the time of malfunction. It appears on the select
monitor display in volts.
NOTE:
Only AWD model
LED No. Signal name Display
1 Motor relay monitor MM
2 Stop light switch B1
3 AT ABS signal AT
4 CCM signal CM
5 ABS signal AO
6——
7——
8——
9——
10——
MM B1 AT CM AO
—————
1
2345
678910
Q: MODE FE15
—ON↔OFF SIGNAL—

ON or OFF is indicated at the time of malfunction.

Requirement for LED“ON”
LED No. 1 Motor relay is turned ON.
LED No. 2 Stop light switch is turned ON. (With brake
pedal depressed.)
LED No. 3 ABS control operates.
LED No. 4 ABS control operates.
LED No. 5 ABS control operates.
121
4-4cBRAKES [ABS 5.3 TYPE]
9. Select Monitor Function Mode