SUBARU LEGACY 1997 Service Repair Manual

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.
85
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

B4M0935
K: MODE FE1 AND FE5
—FRONT RIGHT WHEEL SPEED SIGNAL
(FR)—

The wheel speed is indicated at the time of malfunction.

FE1: FR wheel speed is indicated in mile per hour (mile/
h).

FE5: 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.
B4M0936
L: MODE FE2 AND FE6
—FRONT LEFT WHEEL SPEED SIGNAL
(FL)—

The wheel speed is indicated at the time of malfunction.

FE2: FL wheel speed is indicated in mile per hour (mile/
h).

FE6: FL wheel speed is indicated in kilometer per hour
(km/h).
NOTE:
The monitor as shown, indicates that FL wheel speed is 29
km/h.
87
4-4dBRAKES [ABS 5.3i TYPE]
9. Select Monitor Function Mode

B4M0937
M: MODE FE3 AND FE7
—REAR RIGHT WHEEL SPEED SIGNAL
(RR)—

The wheel speed is indicated at the time of malfunction.

FE3: RR wheel speed is indicated in mile per hour (mile/
h).

FE7: 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.
B4M0938
N: MODE FE4 AND FE8
—REAR LEFT WHEEL SPEED SIGNAL (RL)
—

The wheel speed is indicated at the time of malfunction.

FE4: RL wheel speed is indicated in mile per hour (mile/
h).

FE8: 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.
B4M0942
O: MODE FE13
—ABSCM&H/U POWER SUPPLY VOLTAGE
(POWER)—

ABSCM&H/U power supply voltage is indicated at the
time of malfunction.
88
4-4dBRAKES [ABS 5.3i 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.
H4M1151
R: MODE FE16
—TROUBLE CODE (CODE)—

When freeze frame data is stored in memory, trouble
code appears on monitor.
NOTE:
The monitor as shown, indicates trouble code 21.
89
4-4dBRAKES [ABS 5.3i TYPE]
9. Select Monitor Function Mode

10. Diagnostics Chart with Select
Monitor
A: BASIC DIAGNOSTIC CHART
B4M1076A
CAUTION:
Remove foreign matter (dust, water, etc.) from the
ABSCM&H/U connector during removal and installa-
tion.
NOTE:
To check harness for broken wires or short circuits, shake
it while holding it or the connector.
90
4-4dBRAKES [ABS 5.3i TYPE]
10. Diagnostics Chart with Select Monitor

B: LIST OF TROUBLE CODE
Code Display screen (FB1) Contents of diagnosis Ref. to
—ERROR 3 (1) Select monitor communication failure 4-4d [T10C0]
11 NO TROUBLEAlthough no trouble appears on the select monitor display, the ABS
warning light remains on.4-4d [T10D0]
21 FR. SS HARD Open circuit or input voltage too high of FR sensor 4-4d [T10E0]
22 FR. SS SOFT Abnormal ABS sensor signal of FR sensor 4-4d [T10I0]
23 FL. SS HARD Open circuit or input voltage too high of FL sensor 4-4d [T10F0]
24 FL. SS SOFT Abnormal ABS sensor signal of FL sensor 4-4d [T10J0]
25 RR. SS HARD Open circuit or input voltage too high of RR sensor 4-4d [T10G0]
26 RR. SS SOFT Abnormal ABS sensor signal of RR sensor 4-4d [T10K0]
27 RL. SS HARD Open circuit or input voltage too high of RL sensor 4-4d [T10H0]
28 RL. SS SOFT Abnormal ABS sensor signal of RL sensor 4-4d [T10L0]
29 EITHER. SS SOFT Abnormal ABS sensor signal (any one of four) 4-4d [T10M0]
31 FR. EV VALVE Abnormal FR inlet valve 4-4d [T10N0]
32 FR. AV VALVE Abnormal FR outlet valve 4-4d [T10R0]
33 FL. EV VALVE Abnormal FL inlet valve 4-4d [T10O0]
34 FL. AV VALVE Abnormal FL outlet valve 4-4d [T10S0]
35 RR. EV VALVE Abnormal RR inlet valve 4-4d [T10P0]
36 RR. AV VALVE Abnormal RR outlet valve 4-4d [T10T0]
37 RL. EV VALVE Abnormal RL inlet valve 4-4d [T10Q0]
38 RL. AV VALVE Abnormal RL outlet valve 4-4d [T10U0]
41 ECU Abnormal ABSCM&H/U 4-4d [T10V0]
42LOW VOLTAGE Source voltage is low. 4-4d [T10W0]
HIGH VOLTAGE Source voltage is high. 4-4d [T10X0]
44CCM LINE A combination of AT control abnormals (ABS not in control) 4-4d [T10Y0]
CCM OPEN A combination of AT control abnormals (ABS in control) 4-4d [T10Z0]
51V. RELAY Abnormal valve relay 4-4d [T10AA0]
V. RELAY ON Valve relay ON failure 4-4d [T10AB0]
52M. RELAY OPEN Open circuit of motor relay 4-4d [T10AC0]
M. RELAY ON Motor relay ON failure 4-4d [T10AD0]
MOTOR Abnormal motor 4-4d [T10AE0]
54 BLS Abnormal stop light switch 4-4d [T10AF0]
56G SENSOR LINE Open or short circuit of G sensor 4-4d [T10AG0]
G SENSOR +B Battery short of G sensor 4-4d [T10AH0]
G SENSOR H µ Abnormal G sensor high µ output 4-4d [T10AI0]
G SENSOR STICK G sensor output is stuck. 4-4d [T10AJ0]
NOTE:
High µ means high friction coefficient against road sur-
face.
91
4-4dBRAKES [ABS 5.3i TYPE]
10. Diagnostics Chart with Select Monitor

B4M0943
C: ERROR 3 (1)
—SELECT MONITOR COMMUNICATION
FAILURE—
DIAGNOSIS:

Faulty harness connector
TROUBLE SYMPTOM:

ABS warning light remains on.

ERROR 3 or 1 appears on the select monitor display.
WIRING DIAGRAM:
B4M1266
92
4-4dBRAKES [ABS 5.3i TYPE]
10. Diagnostics Chart with Select Monitor

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.
94
4-4dBRAKES [ABS 5.3i TYPE]
10. Diagnostics Chart with Select Monitor