1996 SUBARU LEGACY Ecu

8B5CHECK ABS SENSOR MECHANICAL
TROUBLE.
: Tightening torque:
32±10 N⋅m (3.3±1.0 kg-m, 24±7 ft-lb)
Are the ABS sensor installation bolts tight-
ened securely?
: Go to next.
: Tighten ABS sensor installation bolts securely.
: Tightening torque:
13±3 N⋅m (1.3±0.3 kg-m, 9±2.2 ft-lb)
Are the tone wheel installation bolts tight-
ened securely?
: Go to next step.
: Tighten tone wheel installation bolts securely.
G4M0700
1) Measure tone wheel-to-pole piece gap over entire
perimeter of the wheel.
: Is the gap within the specifications shown
in the following table?
SpecificationsFront wheel Rear wheel
0.9—1.4 mm
(0.035—0.055 in)0.7—1.2 mm
(0.028—0.047 in)
G4M0701
: Go to next step.
: Adjust the gap.
NOTE:
Adjust the gap using spacers (Part No. 26755AA000). If
spacers cannot correct the gap, replace worn sensor or
worn tone wheel.
2) Measure hub runout.
: Is the runout less than 0.05 mm (0.0020 in)?
: Go to step8B6.
: Repair hub.
32
4-4cBRAKES [ABS 5.3 TYPE]
8. Diagnostics Chart with Trouble Code

WIRING DIAGRAM:
B4M1035
8C1CHECK ABS SENSOR MECHANICAL
TROUBLE.
: Tightening torque:
32±10 N⋅m (3.3±1.0 kg-m, 24±7 ft-lb)
Are the ABS sensor installation bolts tight-
ened securely?
: Go to next.
: Tighten ABS sensor installation bolts securely.
: Tightening torque:
13±3 N⋅m (1.3±0.3 kg-m, 9±2.2 ft-lb)
Are the tone wheel installation bolts tight-
ened securely?
: Go to next step.
: Tighten tone wheel installation bolts securely.
35
4-4cBRAKES [ABS 5.3 TYPE]
8. Diagnostics Chart with Trouble Code

G4M0700
1) Measure tone wheel to pole piece gap over entire
perimeter of the wheel.
: Is the gap within the specifications shown
in the following table?
SpecificationsFront wheel Rear wheel
0.9—1.4 mm
(0.035—0.055 in)0.7—1.2 mm
(0.028—0.047 in)
G4M0701
: Go to next.
: Adjust the gap.
NOTE:
Adjust the gap using spacer (Part No. 26755AA000). If
spacers cannot correct the gap, replace worn sensor or
worn tone wheel.
: Is an oscilloscope available?
: Go to next step.
: Go to step 13).
B4M0815A
2) Raise all four wheels of ground.
3) Turn ignition switch OFF.
4) Disconnect connector from ABS control module.
5) Remove band.
6) Remove cable clamp cover.
7) Remove screws securing connector cover.
CAUTION:
Do not allow harness to catch on adjacent parts dur-
ing installation.
B4M1026
8) Remove connector cover.
B4M1027A
NOTE:

To install, reverse above removal procedures.

Align connector cover rib with connector hole before
installation.
36
4-4cBRAKES [ABS 5.3 TYPE]
8. Diagnostics Chart with Trouble Code

8D2
CHECK TIRE.
: Are the tire specifications correct?
: Go to next.
: Replace tire.
: Is the tire worn excessively?
: Replace tire.
: Go to next.
: Is the tire pressure correct?
: Go to step8D3.
: Adjust tire pressure.
8D3CHECK ABS SENSOR MECHANICAL
TROUBLE.
: Tightening torque:
32±10 N⋅m (3.3±1.0 kg-m, 24±7 ft-lb)
Are the ABS sensor installation bolts tight-
ened securely?
: Go to next.
: Tighten ABS sensor installation bolts securely.
: Tightening torque:
13±3 N⋅m (1.3±0.3 kg-m, 9±2.2 ft-lb)
Are the tone wheel installation bolts tight-
ened securely?
: Go to next step.
: Tighten tone wheel installation bolts securely.
G4M0700
1) Measure tone wheel to pole piece gap over entire
perimeter of the wheel.
: Is the gap within the specifications shown
in the following table?
SpecificationsFront wheel Rear wheel
0.9—1.4 mm
(0.035—0.055 in)0.7—1.2 mm
(0.028—0.047 in)
44
4-4cBRAKES [ABS 5.3 TYPE]
8. Diagnostics Chart with Trouble Code

B: LIST OF TROUBLE CODE
Code Display screen (FB1) Contents of diagnosis Ref. to
—ERROR 3 (1) Select monitor communication failure 4-4c [T10C0]
11 NO TROUBLEAlthough no trouble appears on the select monitor display, the ABS
warning light remains on.4-4c [T10D0]
21 FR. SS HARD Open circuit or input voltage too high of FR sensor 4-4c [T10E0]
22 FR. SS SOFT Abnormal ABS sensor signal of FR sensor 4-4c [T10I0]
23 FL. SS HARD Open circuit or input voltage too high of FL sensor 4-4c [T10F0]
24 FL. SS SOFT Abnormal ABS sensor signal of FL sensor 4-4c [T10J0]
25 RR. SS HARD Open circuit or input voltage too high of RR sensor 4-4c [T10G0]
26 RR. SS SOFT Abnormal ABS sensor signal of RR sensor 4-4c [T10K0]
27 RL. SS HARD Open circuit or input voltage too high of RL sensor 4-4c [T10H0]
28 RL. SS SOFT Abnormal ABS sensor signal of RL sensor 4-4c [T10L0]
29 EITHER. SS SOFT Abnormal ABS sensor signal (any one of four) 4-4c [T10M0]
31 FR. EV VALVE Abnormal FR inlet valve 4-4c [T10N0]
32 FR. AV VALVE Abnormal FR outlet valve 4-4c [T10R0]
33 FL. EV VALVE Abnormal FL inlet valve 4-4c [T10O0]
34 FL. AV VALVE Abnormal FL outlet valve 4-4c [T10S0]
35 RR. EV VALVE Abnormal RR inlet valve 4-4c [T10P0]
36 RR. AV VALVE Abnormal RR outlet valve 4-4c [T10T0]
37 RL. EV VALVE Abnormal RL inlet valve 4-4c [T10Q0]
38 RL. AV VALVE Abnormal RL outlet valve 4-4c [T10U0]
41 ECU Abnormal ABSCM 4-4c [T10V0]
42 LOW VOLTAGE Source voltage is low. 4-4c [T10W0]
44CCM LINE A combination of AT control abnormals (ABS not in control) 4-4c [T10X0]
CCM OPEN A combination of AT control abnormals (ABS in control) 4-4c [T10Y0]
46GS POWER OVER G sensor line voltage too high 4-4c [T10Z0]
GS POWER LOW G sensor line voltage too low 4-4c [T10AA0]
51V. RELAY Abnormal valve relay 4-4c [T10AB0]
V. RELAY ON Valve relay ON failure 4-4c [T10AC0]
52M. RELAY OPEN Open circuit of motor relay 4-4c [T10AD0]
M. RELAY ON Motor relay ON failure 4-4c [T10AE0]
MOTOR Abnormal motor 4-4c [T10AF0]
54 BLS Abnormal stop light switch 4-4c [T10AG0]
56G SENSOR LINE Open or short circuit of G sensor 4-4c [T10AH0]
G SENSOR +B Battery short of G sensor 4-4c [T10AI0]
G SENSOR Hµ Abnormal G sensor high µ output 4-4c [T10AJ0]
G SENSOR STICK G sensor output is stuck. 4-4c [T10AK0]
NOTE:
High µ means high friction coefficient against road sur-
face.
124
4-4cBRAKES [ABS 5.3 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 voltage 10—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 CON-
NECTOR.
Turn ignition switch to OFF.
: Is ABSCM connector inserted into ABSCM
until the clamp locks onto it?
: Go to step10C5.
: Insert ABSCM connector into ABSCM until the
clamp locks onto it.
127
4-4cBRAKES [ABS 5.3 TYPE]
10. Diagnostics Chart with Select Monitor

B4M0922
10H1CHECK OUTPUT OF ABS SENSOR
USING SELECT MONITOR.
Read the ABS sensor output corresponding to the faulty
system in the select monitor function mode.
NOTE:
The select monitor display shows that the front right wheel
is rotating at 30 km/h.
: Does the speed indicated on the display
change in response to the speedometer
reading during acceleration/deceleration
when the steering wheel is in the straight-
ahead position?
: Go to step10H2.
: Go to step10H5.
10H2CHECK ABS SENSOR MECHANICAL
TROUBLE.
: Tightening torque:
32±10 N⋅m (3.3±1.0 kg-m, 24±7 ft-lb)
Are the ABS sensor installation bolts tight-
ened securely?
: Go to next.
: Tighten ABS sensor installation bolts securely.
: Tightening torque:
13±3 N⋅m (1.3±0.3 kg-m, 9±2.2 ft-lb)
Are the tone wheel installation bolts tight-
ened securely?
: Go to next step.
: Tighten tone wheel installation bolts securely.
G4M0700
1) Measure tone wheel-to-pole piece gap over entire
perimeter of the wheel.
: Is the gap within the specifications shown
in the following table?
SpecificationsFront wheel Rear wheel
0.9—1.4 mm
(0.035—0.055 in)0.7—1.2 mm
(0.028—0.047 in)
136
4-4cBRAKES [ABS 5.3 TYPE]
10. Diagnostics Chart with Select Monitor

10H9CHECK ABS SENSOR MECHANICAL
TROUBLE.
: Tightening torque:
32±10 N⋅m (3.3±1.0 kg-m, 24±7 ft-lb)
Are the ABS sensor installation bolts tight-
ened securely?
: Go to next.
: Tighten ABS sensor installation bolts securely.
: Tightening torque:
13±3 N⋅m (1.3±0.3 kg-m, 9±2.2 ft-lb)
Are the tone wheel installation bolts tight-
ened securely?
: Go to next step.
: Tighten tone wheel installation bolts securely.
G4M0700
1) Measure tone wheel-to-pole piece gap over entire
perimeter of the wheel.
: Is the gap within the specifications shown
in the following table?
SpecificationsFront wheel Rear wheel
0.9—1.4 mm
(0.035—0.055 in)0.7—1.2 mm
(0.028—0.047 in)
G4M0701
: Go to next step.
: Adjust the gap.
NOTE:
Adjust the gap using spacers (Part No. 26755AA000). If
spacers cannot correct the gap, replace worn sensor or
worn tone wheel.
2) Measure hub runout.
: Is the runout less than 0.05 mm (0.0020 in)?
: Go to step10H10.
: Repair hub.
140
4-4cBRAKES [ABS 5.3 TYPE]
10. Diagnostics Chart with Select Monitor