1996 SUBARU LEGACY wheel

N: TROUBLE CODE 56
—ABNORMAL G SENSOR OUTPUT
VOLTAGE—
DIAGNOSIS:

Faulty G sensor output voltage
TROUBLE SYMPTOM:

ABS does not operate.
8N1.Check all four wheels for free turning.
8N2.Check specifications of ABSCM.
8N3.Check input voltage of G sensor.
8N4.Check broken wire in G sensor output harness
and ground harness.
8N5.Check ground short in G sensor output
harness.
8N6.Check battery short of harness.
8N7.Check G sensor.
8N8.Check poor contact in connector between
ABSCM and G sensor.
8N9.Check ABSCM.








105
4-4cBRAKES [ABS 5.3 TYPE]
8. Diagnostics Chart with Trouble Code

WIRING DIAGRAM:
B4M1050
8N1CHECK ALL FOUR WHEELS FOR FREE
TURNING.
: Have the wheels been turned freely such as
when the vehicle is lifted up, or operated on
a rolling road?
: The ABS is normal. Erase the trouble code.
: Go to step8N2.
B4M0910A
8N2
CHECK SPECIFICATIONS OF ABSCM.
Check specifications of the plate attached to the ABSCM.
: Is an ABSCM for 4WD model installed on a
FWD model?
CAUTION:
Be sure to turn ignition switch to OFF when removing
ABSCM.
: Replace ABSCM.
: Go to step8N3.
106
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.Possible 4-4c [T9H0]
111
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 and freeze
frame data is erased.Function of clearing trouble code and freeze frame
data stored in memory.Possible4-4c [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
[W19D1]
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

B4M0921
B: MODE F00
—ROM ID NUMBER (ROM)—
CONDITION:
Ignition switch ON
SPECIFIED DATA:
Presentation display

Probable cause (Item outside“specified data”)
1. Error 1
Check for loose or disconnected connector, and
discontinued circuit, etc.
2. Error 2Check for poor contact of cartridge, or different type
cartridge.
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.
11 5
4-4cBRAKES [ABS 5.3 TYPE]
9. Select Monitor Function Mode

B4M0923
D: MODE F02 AND F06
—FRONT LEFT WHEEL SPEED SIGNAL
(FL)—

Compare speedometer with monitor indications.

F02: FL wheel speed is indicated in mile per hour (mile/
h).

F06: 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.
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.
11 6
4-4cBRAKES [ABS 5.3 TYPE]
9. Select Monitor Function Mode

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.
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
11 7
4-4cBRAKES [ABS 5.3 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.
120
4-4cBRAKES [ABS 5.3 TYPE]
9. Select Monitor Function Mode