ESP SUBARU LEGACY 1995 Service Service Manual

B3M0383
(5) Designate mode using function key.
(6) Read data on Subaru select monitor.
Function mode: F09
SPECIFIED DATA:
0.5±0.2 V (Throttle fully closed.)
4.6±0.3 V (Throttle fully open.)
[Must be changed correspondingly with accelera-
tor pedal operation (from“released”to
“depressed”position).]
B3M0238A
4. CHECK POWER SUPPLY TO THROTTLE POSITION
SENSOR.
1) Turn ignition switch to OFF.
2) Disconnect connector from throttle position sensor.
3) Turn ignition switch to ON.
4) Measure power supply voltage to throttle position sen-
sor.
Connector & terminal / Specified voltage:
(E13) No. 1—Body / 5.12±0.1 V
OBD0145A

Using Subaru select monitor:
(1) Turn ignition switch to OFF.
(2) Connect the Subaru select monitor to data link con-
nector.
(3) Turn ignition switch to ON and Subaru select moni-
tor switch to ON.
OBD0506
(4) Designate mode using function key.
(5) Read data on Subaru select monitor.
Function mode: F14
SPECIFIED DATA:
5.12±0.1 V
44
3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
7. Diagnostic Chart with Trouble Code

B4M0236B
2. CHECK INPUT VOLTAGE OF A.B.S. CONTROL
MODULE AND HYDRAULIC CONTROL UNIT FROM
A.B.S. WARNING LIGHT.
1) Turn ignition switch OFF and remove combination
meter.
2) Disconnect connector from A.B.S. control module and
hydraulic control unit.
3) Turn ignition switch ON.
4) Measure voltage between A.B.S. control module and
body, and between hydraulic control unit and body.
Connector & terminal / Specified voltage:
(P3) No. 29—body / 10—12 V
(F9) No. 10—body / 10—12 V
B4M0237B
3. CHECK GROUND LINE OF A.B.S. CONTROL
MODULE AND HYDRAULIC CONTROL UNIT.
Measure resistance between A.B.S. control module and
body, and between hydraulic control unit and body.
Connector & terminal / Specified resistance:
(P3) No. 10—body / 0Ω
(P3) No. 20—body / 0Ω
(P3) No. 34—body / 0Ω
(F9) No. 8—body / 0Ω
G4M0690
4. CHECK VALVE RELAY.
1) Remove valve relay.
2) Attach circuit tester probes to terminals, as shown in
figure.
3) Measure resistance between respective terminals.
Terminal / Specified resistance:
No. 87—No. 30 / 0Ω(when 12 volts applied.)
No. 87—No.30/1MΩ(when no volts applied.)
No. 87a—No.30/1MΩ(when 12 volts applied.)
No. 87a—No. 30 / 0Ω(when no volts applied.)
13
4-4aBRAKES
7. Diagnostics Chart with Trouble Code

B4M0262B
2. CHECK INPUT VOLTAGE OF HYDRAULIC
CONTROL UNIT.
1) Turn ignition switch OFF.
2) Disconnect connector from hydraulic control unit.
3) Turn ignition switch ON.
4) Measure input voltage between hydraulic control unit
connector and body.
Connector & terminal / Specified voltage:
(F8) No. 1—Body / 10—12 V
B4M0263B
3. CHECK HARNESS CONNECTOR BETWEEN A.B.S.
CONTROL MODULE AND HYDRAULIC CONTROL
UNIT.
1) Turn ignition switch OFF.
2) Disconnect connector from A.B.S. control module and
hydraulic control unit.
3) Measure resistance between A.B.S. control module and
hydraulic control unit.
Connector & terminal / Specified resistance:
(P3) No. 32—(F9) No. 11 / 0Ω
G4M0690
4. CHECK VALVE RELAY.
1) Remove valve relay.
2) Attach circuit tester probes to terminals, as shown in
figure.
3) Measure resistance between respective terminals.
Terminal / Specified resistance:
No. 87—No. 30 / 0Ω(when 12 volts applied.)
No. 87—No.30/1MΩ(when no volts applied.)
No. 87a—No.30/1MΩ(when 12 volts applied.)
No. 87a—No. 30 / 0Ω(when no volts applied.)
36
4-4aBRAKES
7. Diagnostics Chart with Trouble Code

B4M0262B
5. CHECK POWER SUPPLY CIRCUIT OF HYDRAULIC
CONTROL UNIT.
1) Turn ignition switch OFF.
2) Disconnect connector from hydraulic control unit.
3) Turn ignition switch ON.
4) Measure voltage between hydraulic control unit and
body.
Connector & terminal / Specified voltage:
(F8) No. 1—Body / 10—12 V
G4M0690
6. CHECK VALVE RELAY.
1) Remove valve relay.
2) Attach circuit tester probes to terminals, as shown in
figure.
3) Measure resistance between respective terminals.
Terminal / Specified resistance:
No. 87—No. 30 / 0Ω(when 12 volts applied.)
No. 87—No.30/1MΩ(when no volts applied.)
No. 87a—No.30/1MΩ(when 12 volts applied.)
No. 87a—No. 30 / 0Ω(when no volts applied.)
40
4-4aBRAKES
7. Diagnostics Chart with Trouble Code

B4M0440
B4M0441
1. CHECK RESISTANCE OF VALVE RELAY.
1) Turn ignition switch OFF.
2) Remove valve relay.
3) Measure resistance between valve relay terminals.
Terminal / Specified resistance:
No. A—B / 90±10Ω
B4M0442
2. CHECK CONTACT POINT OF VALVE RELAY.
1) Turn ignition switch OFF.
2) Remove valve relay.
3) Attach circuit tester probes to terminals as shown in
figure.
4) Measure resistance between respective terminals.
Terminal / Specified resistance:
No. C—E/1Ωor less (When 12 volts applied.)
No. C—E/1MΩor more
(When no voltage is applied.)
No. C—F/1MΩor more
(When 12 volts applied.)
No. C—F/1Ωor less
(When no voltage is applied.)
63
4-4bBRAKES
8. Diagnostics Chart with Trouble Code

Trouble code/Contents of troubles Memory function Contents of diagnosis Page
Airbag warning light remains on. Not provided.1) Airbag warning light is faulty.
2) Airbag control module to airbag warning light
harness circuit is shorted or open.
3) Grounding circuit is faulty.
4) Airbag control module is faulty.
5) (AB1) and (B31) are not connected properly.36
Airbag warning light remains off. Not provided.1) Fuse No. 15 is blown.
2) Body harness circuit is open.
3) Airbag warning light is faulty.
4) Airbag main harness is faulty.
5) Airbag control module is faulty.40
Warning light
indicates trouble
code, then normal
code.Flashing trouble
code.Provided. Airbag system component parts are faulty. 42
Flashing
normal code.
Not provided.1) Airbag connector is faulty.
2) Fuse No. 16 is blown.
3) Airbag main harness is faulty.
4) Airbag control module is faulty.
5) Body harness is faulty.45
2. HOW TO READ TROUBLE CODES
The AIRBAG warning light flashes a code corresponding to
the faulty parts.
The long segment (1.2 sec on) indicates a“ten”, and the
short segment (0.3 sec on) indicates a“one”.
B5M0117A
11
5-5SUPPLEMENTAL RESTRAINT SYSTEM
4. Diagnostics Chart for On-board Diagnostic System

G6M0205
11) Each connector number shown in the wiring diagram
corresponds to that in the wiring harness. The location of
each connector in the actual vehicle is determined by read-
ing the first character of the connector (for example, a“F”
for F8,“i”for i16, etc.) and the type of wiring harness.
The first character of each connector number refers to the
area or system of the vehicle, as indicated in table below.
Symbol Wiring harness and Cord
F Front wiring harness
B Bulkhead wiring harness
E Engine wiring harness
T Transmission cord
D Door cord LH & RH, Rear gate cord
I Instrument panel wiring harness
RRear wiring harness, Rear defogger cord
Room light cord,
Fuel tank cord,
Sunroof cord,
Trunk lid cord
P Floor wiring harness
7
6-3WIRING DIAGRAM
1. General Description

G6M0208
3. HOW TO DETERMINE AN OPEN CIRCUIT
1) Voltmeter method
An open circuit is determined by measuring the voltage
between respective connectors and ground using a
voltmeter, starting with the connector closest to the power
supply. The power supply must be turned ON so that cur-
rent flows in the circuit. If voltage is not present between a
particular connector and ground, the circuit between that
connector and the previous connector is open.
G6M0209
2) Ohmmeter method
Disconnect all connectors affected, and check continuity in
the wiring between adjacent connectors. When the ohm-
meter indicates“infinite”, the wiring is open.
G6M0210
4. HOW TO DETERMINE A SHORT-CIRCUIT
1) Test lamp method
Connect a test lamp (rated at approximately 3 watts) in
place of the blown fuse and allow current to flow through
the circuit. Disconnect one connector at a time from the
circuit, starting with the one located farthest from the power
supply. If the test lamp goes out when a connector is
disconnected, the wiring between that connection and the
next connector (farther from the power supply) is shorted.
G6M0211
2) Ohmmeter method
Disconnect all affected connectors, and check continuity
between each connector and ground. When ohmmeter
indicates continuity between a particular connector and
ground, that connector is shorted.
10
6-3WIRING DIAGRAM
2. Basic Diagnostics Procedures

3. Working Precautions
1. PRECAUTIONS WHEN WORKING WITH THE
PARTS MOUNTED ON THE VEHICLE
1) When working under a vehicle which is jacked-up,
always be sure to use safety stands.
2) The parking brake must always be applied during work-
ing. Also, in automatic transmission vehicles, keep the
select lever set to the P (Parking) range.
3) Be sure the workshop is properly ventilated when run-
ning the engine. Further, be careful not to touch the belt or
fan while the engine is operating.
4) Be careful not to touch hot metal parts, especially the
radiator and exhaust system immediately after the engine
has been shut off.
2. PRECAUTIONS IN TROUBLE DIAGNOSIS AND
REPAIR OF ELECTRIC PARTS
1) The battery cable must be disconnected from the bat-
tery’s () terminal, and the ignition switch must be set to the
OFF position, unless otherwise required by the diagnos-
tics.
2) Securely fasten the wiring harness with clamps and
slips so that the harness does not interfere with the body
end parts or edges and bolts or screws.
3) When installing parts, be careful not to catch them on
the wiring harness.
G6M0212
4) When disconnecting a connector, do not pull the wires,
but pull while holding the connector body.
11
6-3WIRING DIAGRAM
3. Working Precautions

4. How to Use Wiring Diagram
B6M0213A
A: RELAY
A symbol used to indicate a relay.
B: CONNECTOR-1
The sketch of the connector indicates the one-
pole types.
C: WIRING CONNECTION
Some wiring diagrams are indicated in foldouts
for convenience. Wiring destinations are indi-
cated where necessary by corresponding sym-
bols (as when two pages are needed for clear
indication).
D: FUSE No. & RATING
The“FUSE No. & RATING”corresponds that
used in the fuse box (main fuse box, and joint
box).
E: CONNECTOR-2
1. Each connector is indicated by a symbol.
2. Each terminal number is indicated in the cor-
responding wiring diagram in an abbreviated
form.
3. For example, terminal number“C2”refers to
No. 2 terminal of connector (C:F41) shown in
the connector sketch.
13
6-3WIRING DIAGRAM
4. How to Use Wiring Diagram