Control unit 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 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 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 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 1788 of 2248
B4M0511
L: TROUBLE CODE 31
FR.IN VALVE
—Faulty front right inlet solenoid valve—
DIAGNOSIS:
Faulty harness/connector
Faulty solenoid valve in hydraulic unit
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS and TCS do not operate.
ABS sequence control does not operate.
TCS sequence control does not operate.
Air bleeding mode does not operate.
1. Check resistance of solenoid valve.
OK
Not OK
Replace hydraulic unit.
2. Check body short of solenoid valve.
OK
Not OK
Replace hydraulic unit.
3. Check body short of harness.
OK
Not OK
Repair harness.
4. Check harness between ABS/TCS control
module and hydraulic unit.
OK
Not OK
Repair harness/connector.
Replace ABS/TCS control module.
107
4-4bBRAKES
10. Diagnostic Chart with Select Monitor
Page 1789 of 2248
B4M0512
M: TROUBLE CODE 32
FR.OUT VALVE
—Faulty front right outlet solenoid valve—
DIAGNOSIS:
Faulty harness/connector
Faulty solenoid valve in hydraulic unit
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS and TCS do not operate.
ABS sequence control does not operate.
TCS sequence control does not operate.
Air bleeding mode does not operate.
1. Check resistance of solenoid valve.
OK
Not OK
Replace hydraulic unit.
2. Check body short of solenoid valve.
OK
Not OK
Replace hydraulic unit.
3. Check body short of harness.
OK
Not OK
Repair harness.
4. Check harness between ABS/TCS control
module and hydraulic unit.
OK
Not OK
Repair harness/connector.
Replace ABS/TCS control module.
B4M0513
N: TROUBLE CODE 33
FL.IN VALVE
—Faulty front left inlet solenoid valve—
DIAGNOSIS:
Faulty harness/connector
Faulty solenoid valve in hydraulic unit
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS and TCS do not operate.
ABS sequence control does not operate.
TCS sequence control does not operate.
Air bleeding mode does not operate.
NOTE:
The procedures used are the same as those for FR.IN
VA LV E .
108
4-4bBRAKES
10. Diagnostic Chart with Select Monitor
Page 1790 of 2248
B4M0514
O: TROUBLE CODE 34
FL.OUT VALVE
—Faulty front left outlet solenoid valve—
DIAGNOSIS:
Faulty harness/connector
Faulty solenoid valve in hydraulic unit
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS and TCS do not operate.
ABS sequence control does not operate.
TCS sequence control does not operate.
Air bleeding mode does not operate.
NOTE:
The procedures used are the same as those for FR.OUT
VA LV E .
B4M0515
P: TROUBLE CODE 35
RR.IN VALVE
—Faulty rear right inlet solenoid valve—
DIAGNOSIS:
Faulty harness/connector
Faulty solenoid valve in hydraulic unit
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS and TCS do not operate.
ABS sequence control does not operate.
TCS sequence control does not operate.
Air bleeding mode does not operate.
NOTE:
The procedures used are the same as those for FR.IN
VA LV E .
109
4-4bBRAKES
10. Diagnostic Chart with Select Monitor
Page 1791 of 2248
B4M0516
Q: TROUBLE CODE 36
RR.OUT VALVE
—Faulty rear right outlet solenoid valve—
DIAGNOSIS:
Faulty harness/connector
Faulty solenoid valve in hydraulic unit
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS and TCS do not operate.
ABS sequence control does not operate.
TCS sequence control does not operate.
Air bleeding mode does not operate.
NOTE:
The procedures used are the same as those for FR.OUT
VA LV E .
B4M0517
R: TROUBLE CODE 37
RL.IN VALVE
—Faulty rear left inlet solenoid valve—
DIAGNOSIS:
Faulty harness/connector
Faulty solenoid valve in hydraulic unit
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS and TCS do not operate.
ABS sequence control does not operate.
TCS sequence control does not operate.
Air bleeding mode does not operate.
NOTE:
The procedures used are the same as those for FR.IN
VA LV E .
11 0
4-4bBRAKES
10. Diagnostic Chart with Select Monitor
Page 1792 of 2248
B4M0518
S: TROUBLE CODE 38
RL.OUT VALVE
—Faulty rear left outlet solenoid valve—
DIAGNOSIS:
Faulty harness/connector
Faulty solenoid valve in hydraulic unit
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS and TCS do not operate.
ABS sequence control does not operate.
TCS sequence control does not operate.
Air bleeding mode does not operate.
NOTE:
The procedures used are the same as those for FR.OUT
VA LV E .
B4M0519
T: TROUBLE CODE 41
ECU
—Faulty ABS/TCS control module—
DIAGNOSIS:
Faulty ABS/TCS control module
Faulty harness/connector
TROUBLE SYMPTOM:
ABS does not operate.
TCS does not operate.
1. Check ground circuit of ABS/TCS control
module.
OK
Not OK
Repair harness/connector.
2. Check harness connectors between power
supply generator, battery and ABS/TCS con-
trol module.
OK
Not OK
Repair harness/connector.
3. Check sources of signal noise.
OK
Not OK
Repair noise sources.
Replace ABS/TCS control module.
111
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