sensor SUBARU LEGACY 1995 Service Repair Manual
[x] Cancel search | Manufacturer: SUBARU, Model Year: 1995, Model line: LEGACY, Model: SUBARU LEGACY 1995Pages: 2248, PDF Size: 48.81 MB
Page 1782 of 2248
B4M0496
F: TROUBLE CODE 23
1. FL.SS OPEN
—Faulty front left ABS sensor (Open circuit)—
DIAGNOSIS:
Faulty ABS sensor
Faulty harness and connector
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS and TCS do not operate.
NOTE:
The procedures used are the same as those for FR.SS
OPEN.
B4M0497
2. FL.SS SHORT
—Faulty front left ABS sensor (Short circuit)—
DIAGNOSIS:
Faulty ABS sensor
Faulty harness and connector
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS and TCS do not operate.
NOTE:
The procedures used are the same as those for FR.SS
SHORT.
101
4-4bBRAKES
10. Diagnostic Chart with Select Monitor
Page 1783 of 2248
B4M0498
G: TROUBLE CODE 24
1. FL.SS W.SPEED
—Irregular signals from front left ABS sensor—
DIAGNOSIS:
Faulty ABS sensor signal (noise, irregular signal, etc.)
Faulty harness/connector
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS and TCS do not operate.
NOTE:
The procedures used are the same as those for FR.SS
W.SPEED.
B4M0499
2. FL.SS OR MV
—Irregular signals from front left ABS sensor in
decompressing mode—
DIAGNOSIS:
Faulty ABS sensor signal (noise, irregular signal, etc.)
Faulty hydraulic unit
Faulty harness/connector
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS and TCS do not operate.
NOTE:
The procedures used are the same as those for FR.SS OR
MV.
B4M0500
3. FL.SS OVER
—Excessive speed of front left ABS sensor signal—
DIAGNOSIS:
Faulty ABS sensor signal (noise, irregular signal, etc.)
Faulty harness/connector
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS and TCS do not operate.
NOTE:
The procedures used are the same as those for FR.SS
OVER.
102
4-4bBRAKES
10. Diagnostic Chart with Select Monitor
Page 1784 of 2248
B4M0501
H: TROUBLE CODE 25
1. RR.SS OPEN
—Faulty rear right ABS sensor (Open circuit)—
DIAGNOSIS:
Faulty ABS sensor
Faulty harness and connector
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS and TCS do not operate.
NOTE:
The procedures used are the same as those for FR.SS
OPEN.
B4M0502
2. RR.SS SHORT
—Faulty rear right ABS sensor (Short circuit)—
DIAGNOSIS:
Faulty ABS sensor
Faulty harness and connector
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS and TCS do not operate.
NOTE:
The procedures used are the same as those for FR.SS
SHORT.
103
4-4bBRAKES
10. Diagnostic Chart with Select Monitor
Page 1785 of 2248
B4M0503
I: TROUBLE CODE 26
1. RR.SS W.SPEED
—Irregular signals from rear right ABS sensor—
DIAGNOSIS:
Faulty ABS sensor signal (noise, irregular signal, etc.)
Faulty harness/connector
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS and TCS do not operate.
NOTE:
The procedures used are the same as those for FR.SS
W.SPEED.
B4M0504
2. RR.SS OR MV
—Irregular signals from rear right ABS sensor in
decompressing mode—
DIAGNOSIS:
Faulty ABS sensor signal (noise, irregular signal, etc.)
Faulty hydraulic unit
Faulty harness/connector
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS and TCS do not operate.
NOTE:
The procedures used are the same as those for FR.SS OR
MV.
B4M0505
3. RR.SS OVER
—Excessive speed of rear right ABS sensor signal—
DIAGNOSIS:
Faulty ABS sensor signal (noise, irregular signal, etc.)
Faulty harness/connector
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS and TCS do not operate.
NOTE:
The procedures used are the same as those for FR.SS
OVER.
104
4-4bBRAKES
10. Diagnostic Chart with Select Monitor
Page 1786 of 2248
B4M0506
J: TROUBLE CODE 27
1. RL.SS OPEN
—Faulty rear left ABS sensor (Open circuit)—
DIAGNOSIS:
Faulty ABS sensor
Faulty harness and connector
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS and TCS do not operate.
NOTE:
The procedures used are the same as those for FR.SS
OPEN.
B4M0507
2. RL.SS SHORT
—Faulty rear left ABS sensor (Short circuit)—
DIAGNOSIS:
Faulty ABS sensor
Faulty harness and connector
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS and TCS do not operate.
NOTE:
The procedures used are the same as those for FR.SS
SHORT.
105
4-4bBRAKES
10. Diagnostic Chart with Select Monitor
Page 1787 of 2248
B4M0508
K: TROUBLE CODE 28
1. RL.SS W.SPEED
—Irregular signals from rear left ABS sensor—
DIAGNOSIS:
Faulty ABS sensor signal (noise, irregular signal, etc.)
Faulty harness/connector
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS and TCS do not operate.
NOTE:
The procedures used are the same as those for FR.SS
W.SPEED.
B4M0509
2. RL.SS OR MV
—Irregular signals from rear left ABS sensor in
decompressing mode—
DIAGNOSIS:
Faulty ABS sensor signal (noise, irregular signal, etc.)
Faulty hydraulic unit
Faulty harness/connector
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS and TCS do not operate.
NOTE:
The procedures used are the same as those for FR.SS OR
MV.
B4M0510
3. RL.SS OVER
—Excessive speed of rear left ABS sensor signal—
DIAGNOSIS:
Faulty ABS sensor signal (noise, irregular signal, etc.)
Faulty harness/connector
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS and TCS do not operate.
NOTE:
The procedures used are the same as those for FR.SS
OVER.
106
4-4bBRAKES
10. Diagnostic Chart with Select Monitor
Page 1797 of 2248
B4M0524
X: TROUBLE CODE 52
1. MOTOR ON
—Motor relay ON malfunction—
DIAGNOSIS:
Faulty motor relay
Faulty motor
Faulty motor sensor
Faulty harness
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS does not operate.
TCS does not operate.
1. Check body short of harness.
OK
Not OK
Repair harness.
2. Check motor operation.
OK
Not OK
Replace motor relay.
3. Check body short of motor sensor.
OK
Not OK
Replace hydraulic unit.
4. Check body short of motor sensor harness.
OK
Not OK
Repair harness.
Replace ABS/TCS control module.
11 6
4-4bBRAKES
10. Diagnostic Chart with Select Monitor
Page 1798 of 2248
B4M0525
2. MOTOR OFF
—Motor relay OFF malfunction—
DIAGNOSIS:
Faulty motor relay
Faulty motor
Faulty motor sensor
Faulty harness/connector
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS and TCS do not operate.
1. Check resistance of motor relay.
OK
Not OK
Replace motor relay.
2. Check input voltage of motor relay.
OK
Not OK
Repair harness/connector.
3. Check harness between ABS/TCS control
module and motor relay.
OK
Not OK
Repair harness/connector.
4. Check motor operation.
OK
Not OK
Go to step 9.
5. Check resistance of motor sensor.
OK
Not OK
Replace hydraulic unit.
6. Check body short of motor sensor.
OK
Not OK
Replace hydraulic unit.
7. Check harness between ABS/TCS control
module and motor sensor.
OK
Not OK
Repair harness/connector.
8. Check body short of motor sensor harness.
OK
Not OK
Repair harness.
Replace ABS/TCS control module.
11 7
4-4bBRAKES
10. Diagnostic Chart with Select Monitor
Page 1799 of 2248
![SUBARU LEGACY 1995 Service Repair Manual 9. Check contact point of motor relay.
<Ref. to 4-4b [T8J10].>
OK
Not OK
Replace motor relay.
10. Check harness between motor and motor
relay.
<Ref. to 4-4b [T8J11].>
OK
Not OK
Repair harness/connec](/img/17/57432/w960_57432-1798.png "SUBARU LEGACY 1995 Service Repair Manual 9. Check contact point of motor relay.
<Ref. to 4-4b [T8J10].>
OK
Not OK
Replace motor relay.
10. Check harness between motor and motor
relay.
<Ref. to 4-4b [T8J11].>
OK
Not OK
Repair harness/connec")
9. Check contact point of motor relay.
OK
Not OK
Replace motor relay.
10. Check harness between motor and motor
relay.
OK
Not OK
Repair harness/connector.
11. Check body short of motor harness.
OK
Not OK
Repair harness.
12. Check ground circuit of motor.
OK
Not OK
Repair harness/connector.
Replace hydraulic unit.
NOTE:
The check can also be made by analyzing the sensor out-
put signal with oscilloscope during the TCS sequence con-
trol operation. If the ECM female connector end gives cor-
rect value, skip steps 5 through 8.
If not, operate the TCS sequence control again and mea-
sure the value at motor sensor male connector end, with
the motor sensor connector disconnected. If the value is
OK, proceed with steps 7 through 8 above.
11 8
4-4bBRAKES
10. Diagnostic Chart with Select Monitor
Page 1800 of 2248
B4M0526
Y: TROUBLE CODE 54
1. B.SW HARD
—Break and short circuit at stroke sensor or its
wiring—
DIAGNOSIS:
Faulty stroke sensor
Faulty harness/connector
Faulty stop light switch
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS and TCS do not operate.
NOTE:
Operate the function F09 in select monitor TCS mode, and
read the sensor output step.
If system is normal, the output reading is 1 when brake
pedal is not depressed, and it changes from 2 to 3, 4 and
5 in accordance with the brake pedal depressing. If so, skip
check steps 1 through 5.
1. Check resistance of stroke sensor.
OK
Not OK
Replace stroke sensor.
2. Check stroke sensor operation.
OK
Not OK
Replace stroke sensor.
3. Check body short of stroke sensor.
OK
Not OK
Replace stroke sensor.
4. Check harness between stroke sensor and
ABS/TCS control module.
OK
Not OK
Repair harness/connector.
5. Check body short of stroke sensor harness.
OK
Not OK
Repair harness.
Replace ABS/TCS control module.
11 9
4-4bBRAKES
10. Diagnostic Chart with Select Monitor