SUBARU LEGACY 1996 Service Repair Manual
Manufacturer: SUBARU, Model Year: 1996, Model line: LEGACY, Model: SUBARU LEGACY 1996Pages: 2890, PDF Size: 61.9 MB
Page 2261 of 2890
E: TROUBLE CODE 32, 34, 36 AND 38
—FAULTY OUTLET SOLENOID VALVE
CIRCUIT(S) IN HYDRAULIC UNIT—
DIAGNOSIS:
Faulty harness/connector
Faulty solenoid valve in hydraulic unit
Faulty ABS/TCS control module
TROUBLE SYMPTOM:
ABS does not operate.
TCS does 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.
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8. Diagnostics Chart with Trouble Code
Page 2262 of 2890
B4M0724
B4M0725A
1. CHECK RESISTANCE OF SOLENOID VALVE.
1) Turn ignition switch OFF.
2) Disconnect connector from hydraulic unit.
3) Measure resistance between hydraulic unit terminals.
TROUBLE CODE / Connector & terminal:
32 / (F15) No. 7—No. 9
34 / (F15) No. 8—No. 10
36 / (F15) No. 5—No. 10
38 / (F15) No. 6—No. 9
Specified resistance: 3.5±1.0Ω
B4M0726A
2. CHECK BODY SHORT OF SOLENOID VALVE.
1) Turn ignition switch OFF.
2) Disconnect connector from hydraulic unit.
3) Measure resistance between hydraulic unit terminals.
TROUBLE CODE / Connector & terminal:
32 / (F15) No. 7—body
34 / (F15) No. 8—body
36 / (F15) No. 5—body
38 / (F15) No. 6—body
Specified resistance: 1 MΩor more
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8. Diagnostics Chart with Trouble Code
Page 2263 of 2890
B4M0424A
3. CHECK BODY SHORT OF HARNESS.
1) Turn ignition switch OFF.
2) Disconnect connector from hydraulic unit.
3) Disconnect connector from ABS/TCS control module.
4) Measure resistance between ABS/TCS control module
connector terminals.
TROUBLE CODE / Connector & terminal:
32 / (P5) No. 3—body
34 / (P4) No. 1—body
36 / (P4) No. 3—body
38 / (P5) No. 8—body
Specified resistance: 1 MΩor more
B4M0425A
4. CHECK HARNESS BETWEEN ABS/TCS CONTROL
MODULE AND HYDRAULIC UNIT.
1) Turn ignition switch OFF.
2) Connect connector to hydraulic unit.
3) Disconnect connector from ABS/TCS control module.
4) Measure resistance between ABS/TCS control module
connector terminals.
TROUBLE CODE / Connector & terminal:
32 / (P5) No. 3—(P6) No. 6
34 / (P4) No. 1—(P6) No. 6
36 / (P4) No. 3—(P6) No. 6
38 / (P5) No. 8—(P6) No. 6
Specified resistance: 3.7±1.0Ω
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8. Diagnostics Chart with Trouble Code
Page 2264 of 2890
F: TROUBLE CODE 41
—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.
B4M0426
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8. Diagnostics Chart with Trouble Code
Page 2265 of 2890
B4M0405A
1. CHECK GROUND CIRCUIT OF ABS/TCS CONTROL
MODULE.
1) Turn ignition switch OFF.
2) Disconnect connector from ABS/TCS control module.
3) Measure resistance between ABS/TCS control module
connector and body.
Connector & terminal / Specified resistance:
(P4) No. 6—body / 1Ωor less
(P5) No. 5—body / 1Ωor less
(P7) No. 15—body / 1Ωor less
2. CHECK HARNESS CONNECTORS BETWEEN
POWER SUPPLY GENERATOR, BATTERY AND ABS/
TCS CONTROL MODULE.
Check for poor contacts in plug-in connectors. Refer to
“Basic checks”in“FOREWORD”.
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8. Diagnostics Chart with Trouble Code
Page 2266 of 2890
G: TROUBLE CODE 42
—SOURCE VOLTAGE IS HIGH.—
DIAGNOSIS:
Power source voltage of the ABS/TCS control module is
more than 18 V.
Faulty ABS/TCS control module
Faulty harness/connector
TROUBLE SYMPTOM:
ABS does not operate.
TCS does not operate.
1. Check generator.
OK
Not OK
Repair generator.
2. Check battery terminal.
OK
Not OK
Repair battery terminal.
3. Check input voltage of ABS/TCS control mod-
ule.
OK
Not OK
Repair harness/connector.
4. Check ground circuit of ABS/TCS control
module.
OK
Not OK
Repair harness/connector.
Replace ABS/TCS control module.
B4M0429
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8. Diagnostics Chart with Trouble Code
Page 2267 of 2890
B4M0430
1. CHECK GENERATOR.
1) Idling after warm-up.
2) Measure voltage between generator B terminal and
body.
Connector / Specified voltage:
(F25)—body / 10—15 V
2. CHECK BATTERY TERMINAL.
Check that the positive and negative battery terminals are
firmly fixed.
B4M0431A
3. CHECK INPUT VOLTAGE OF ABS/TCS CONTROL
MODULE.
1) Turn ignition switch OFF.
2) Disconnect connector from ABS/TCS control module.
3) Run the engine at idle.
4) Measure voltage between ABS/TCS control module
connector and body.
Connector & terminal / Specified voltage:
(P5) No. 1—body / 10—15 V
B4M0405A
4. CHECK GROUND CIRCUIT OF ABS/TCS CONTROL
MODULE.
1) Turn ignition switch OFF.
2) Disconnect connector from ABS/TCS control module.
3) Measure resistance between ABS/TCS control module
connector and body.
Connector & terminal / Specified resistance:
(P4) No. 6—body / 1Ωor less
(P5) No. 5—body / 1Ωor less
(P7) No. 15—body / 1Ωor less
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8. Diagnostics Chart with Trouble Code
Page 2268 of 2890
H: TROUBLE CODE 43
—FAULTY ENGINE CONTROL MODULE
COMMUNICATION CABLES—
DIAGNOSIS:
AET communication cable is broken or short circuited.
AEB communication cable is broken or short circuited.
AEC communication cable is broken or short circuited.
Faulty ABS/TCS control module
Faulty engine control module
TROUBLE SYMPTOM:
TCS does not operate.
1. Check communication cables.
OK
Terminal voltage
remains at 4—5.4 V.
Replace ABS/TCS control module.
Terminal voltage
remains at 10—14 V.
Go to step 2.
Terminal voltage
remains at2Vorless.
Go to step 4.
Replace ABS/TCS control module.
2. Check harness between ABS/TCS control
module and ECM.
OK
Not OK
Repair harness.
3. Check ABS/TCS control module internal
circuits.
OK
Not OK
Replace ABS/TCS control module.
Replace engine control module.
4. Check output voltage of ECM.
Not OK
OK
6. Check open circuit of harness.
OK Not OK
Replace ABS/TCS control
module.
5. Check body short of harness.
OK
Not OK
Repair harness/connector.
Replace engine control module.
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8. Diagnostics Chart with Trouble Code
Page 2269 of 2890
![SUBARU LEGACY 1996 Service Repair Manual B4M0433
B4M0727A
1. CHECK COMMUNICATION CABLES.
1) Operate the TCS sequence control.
<Ref. to 4-4 [W20F0].>
2) Measure the voltage between ABS/TCS control module
and the body during the TCS check sequ](/img/17/57433/w960_57433-2268.png "SUBARU LEGACY 1996 Service Repair Manual B4M0433
B4M0727A
1. CHECK COMMUNICATION CABLES.
1) Operate the TCS sequence control.
<Ref. to 4-4 [W20F0].>
2) Measure the voltage between ABS/TCS control module
and the body during the TCS check sequ")
B4M0433
B4M0727A
1. CHECK COMMUNICATION CABLES.
1) Operate the TCS sequence control.
2) Measure the voltage between ABS/TCS control module
and the body during the TCS check sequence operation.
Connector & terminal:
(P6) No. 12—body (AET communication cable)
(P6) No. 5—body (AEB communication cable)
(P6) No. 14—body (AEC communication cable)
Specified voltage:
High voltage: 4—5.4 V
Low voltage:2Vorless
Check that each of the above voltage reading
are displayed.
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8. Diagnostics Chart with Trouble Code
Page 2270 of 2890
B4M0435A
2. CHECK HARNESS BETWEEN ABS/TCS CONTROL
MODULE AND ENGINE CONTROL MODULE.
1) Turn ignition switch OFF.
2) Disconnect engine control module.
3) Disconnect ABS/TCS control module.
4) Measure voltage between ABS/TCS control module
connector and body.
Connector & terminal / Specified voltage:
(P6) No. 12—body/0V(AET communication
cable)
(P6) No. 5—body/0V(AEB communication
cable)
(P6) No. 14—body/0V(AEC communication
cable)
5) Turn ignition switch ON.
6) Measure voltage between ABS/TCS control module
connector and body.
Connector & terminal / Specified voltage:
(P6) No. 12—body/0V(AET communication
cable)
(P6) No. 5—body/0V(AEB communication
cable)
(P6) No. 14—body/0V(AEC communication
cable)
B4M0434A
3. CHECK ABS/TCS CONTROL MODULE INTERNAL
CIRCUITS.
1) Turn ignition switch OFF.
2) Disconnect engine control module.
3) Connect ABS/TCS control module.
4) Measure voltage between ABS/TCS control module
connector and body.
Connector & terminal / Specified voltage:
(P6) No. 12—body/2Vorless (AET communica-
tion cable)
(P6) No. 5—body/2Vorless (AEB communica-
tion cable)
(P6) No. 14—body/2Vorless (AEC communi-
cation cable)
5) Turn ignition switch ON.
6) Measure voltage between ABS/TCS control module
connector and body.
Connector & terminal / Specified voltage:
(P6) No. 12—body/2Vorless (AET communica-
tion cable)
(P6) No. 5—body/2Vorless (AEB communica-
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8. Diagnostics Chart with Trouble Code