ECU SUBARU LEGACY 1997 Service Repair Manual

No. Load
MB-1Fuse holder (Rear power supply & seat
heater)
MB-2 Power window circuit breaker
MB-3Engine control module
Fuel pump relay
Main relay
OBD-II service connector
MB-4 A/C relay holder
MB-5 Headlight alarm relay (with security)
MB-6 Headlight LH
MB-7Daytime running light control module
Diode (Lighting)
Diode (Security)
Lighting switch
MB-8Combination meter
Front fog light switch
Headlight RH
Front fog light relay
MB-9Door lock timer
Headlight alarm relay
Interrupt relay
Radio
Security control module
Security indicator light
Spot light
Room light
Step light
Combination meter
Luggage room light
Trailer connector
Trunk room light
MB-10 A/C relay holder
SBF-6ABS relay box
TCS motor relay
SBF-7 TCS valve relay
ALT-1Combination meter
Daytime running light control module
Diode (TCS)
IG Headlight alarm relay
STCruise control module
Engine control module
Inhibitor switch (AT)
Interrupt relay
Starter interlock relay (MT)
FB-1Front washer motor
Rear washer motor
FB-2Engine control module
Main fan relay 1
FB-3Sub fan relay 2
Sub fan motor
FB-4Engine control module
Fuel pump relay
Ignition coil
Transmission control moduleNo. Load
FB-5 ABS relay box
FB-6Side marker light LH
Side marker light RH
FB-7 Door lock timer
FB-9 Hazard switch
FB-10AT shift lock control module
Key warning switch
Power antenna
FB-11 Radio
FB-12 Front accessory power supply
FB-13Mirror heater
Rear power supply relay
Remote control rearview mirror switch
Security control module
Vanity mirror illumination light
FB-14AT shift lock control module
Combination switch
Front wiper motor
Rear wiper motor
Rear wiper relay
FB-15ABS/TCS control module
Transmission control module
FB-16Rear defogger
Rear defogger condenser
Rear defogger switch
FB-17 Rear defogger switch
FB-18AT shift lock control module
Back-up light switch (MT)
Inhibitor switch (AT)
FB-19 Hazard switch
FB-20A/C switch
Combination meter
Mode control panel
TCS off switch
FB-22Blower motor relay
Check connector
Daytime running light control module
Daytime running light relay
FRESH/RECIRC actuator
Hi-beam relay
Power window and sunroof relay
Seat belt timer
FB-23 Airbag control module
FB-24 Airbag control module
FB-25 Lighting switch
20
6-3WIRING DIAGRAM
6. Wiring Diagram

28. SECURITY SYSTEM
96
6-3WIRING DIAGRAM
6. Wiring Diagram

7. Electrical Unit Location
Electrical unit Refer to;
A.B.S. control module 4-4a [T300]
A.B.S. G sensor (MT) 4-4a [T300]
A/C compressor relay
7
A/C fuse11
A/C main fan relay 110
A/C main fan relay 28
A/C pressure switch2
A/C sub fan relay 29
ATF temperature sensor 2-7 [T2B1]
Blower motor resistor
26
Blower relay13
Camshaft position sensor 2-7 [T2A2]
Check connector
25
Clutch switch (MT) 6-2 [T300]
Crankshaft position sensor 2-7 [T2A2]
Cruise control module 6-2 [T300]
Cruise control pump 6-2 [T300]
Data link connector (for OBD-II G.S.T.) 2-7 [T2A1]
Data link connector (for S.S.M.) 2-7 [T2A1]
Diagnosis connector 4-4a [T300]
Diagnosis terminal (Ground) 4-4a [T300]
Door lock timer
27
Engine control module 2-7 [T2A1]
Engine coolant temperature sensor 2-7 [T2A2]
Engine hood switch (Security) 6-2 [K6A0]
Evaporator thermoswitch
29
F/B15
FRESH/RECIRC actuator28
Fuel pump relay 2-7 [T2A3]
Fuel gauge module
31
Fuel gauge sub module (AWD)32
FWD switch (AT)1
Headlight alarm relay (Security) 6-2 [K6A0]
Headlight relay LH
5
Headlight relay RH6
Horn relay14
Electrical unit Refer to;
Hydraulic unit (A.B.S.) 4-4a [T300]
Ignition coil 2-7 [T2A3]
Ignitor 2-7 [T2A3]
Idle air control solenoid valve 2-7 [T2A3]
Illumination control module
21
Inhibitor switch 6-2 [T300]
Knock sensor 2-7 [T2A2]
Main fan relay
19
Main relay 2-7 [T2A3]
Mass air flow sensor 2-7 [T2A2]
Mode actuator
12
M/B4
Oil pressure switch3
Oxygen sensor 2-7 [T2A2]
Pedal stroke sensor (T.C.S.) 4-4b [T300]
Power window and sunroof relay
24
Power window circuit breaker23
Purge control solenoid valve 2-7 [T2A3]
Rear defogger relay
17
Seat belt timer20
Security control module 6-2 [K6A0]
Shift lock control module
22
Starter interrupt relay (Security) 6-2 [K6A0]
Stop & brake switch (With cruise con-
trol)6-2 [T300]
Sunroof control module
30
Tail and illumination relay18
T.C.S. control module 4-4b [T300]
T.C.S. motor relay 4-4b [T300]
T.C.S. valve relay 4-4b [T300]
Throttle position sensor 2-7 [T2A2]
Test mode connector 2-7 [T2A1]
Transmission control module 2-7 [T2B1]
Turn & hazard module
16
Vehicle speed sensor 1 2-7 [T2B1]
Vehicle speed sensor 2 2-7 [T2B1]
11 0
6-3WIRING DIAGRAM
7. Electrical Unit Location

Connector Connecting to
No. Pole Color Area No. Name
F120 Blue B-2 P1 Floor wiring harness (With TCS model)
12 * B-2 P1 Floor wiring harness (With ABS model)
F2 20 Blue B-2 B100 Bulkhead wiring harness (With ABS model)
F3 3 Brown B-1 Front turn signal and side marker light RH
F5 1 Black B-1 Horn
F62 * C-1 Front fog light RH
2 Brown C-1 Front fog light RH (Outback with step roof)
F7 3 Black B-1 Headlight RH
F8 2 Gray B-1
Hydraulic unit (ABS)
F9 8 Gray B-1
F10 4 * B-2 TCS motor relay
F11 6 * B-2 TCS valve relay
F12 2 Black B-2 TCS pressure switch
F13 2 Black B-2 TCS motor
F14 2 Gray B-2
Hydraulic unit (TCS)
F15 12 Gray B-2
F16 3 Black C-1 Sub fan motor
F17 3 Black C-2 Radiator main fan motor
F18 2 Gray C-3 Front hood switch (Security)
F19 3 Brown C-3 Front turn signal and side marker light LH
F212 * C-2 Front fog light LH
2 Brown C-2 Front fog light LH (Outback with step roof)
F23 3 Black C-2 Headlight LH
F24 3 Gray B-2 A/C compressor
F25 1 x 2 * B-2
Generator
F26 2 Gray B-2
F27 4 Black B-3 A/C fuse (Relay holder)
F28 4 Black B-3 A/C main fan relay-1 (Relay holder)
F29 4 Black B-3 A/C sub fan relay-2 (Relay holder)
F30 4 Black B-3 A/C main fan relay-2 (Relay holder)
F31 4 Black B-3 A/C relay (Relay holder)
F32 2 Green B-2 Front washer motor
F33 2 * B-3 Rear washer motor
F34 4 Black B-3 SBF holder
F35 8 Black B-3
M/B F36 3 * B-3
F37 2 Black B-3
F38 2 Black B-3
F39 1 Brown B-3
F40 10 Gray B-4
F/B F41 3 Gray B-4
F42 5 Gray B-4
F43 3 Orange B-4 A/C diode
F44 8 * B-3 B61
Bulkhead wiring harness
F45 20 * B-3 B62
F46 2 Black B-4 B108 Bulkhead wiring harness (Outback)
F47 1 Black C-3 Horn (TAIWAN model)
F48 6 * B-3 Shield joint connector (ABS)
F49 83 Black B-3 ABS control module
F50 6 Black B-1 ABS relay box
*: Non-colored
11 8
6-3WIRING DIAGRAM
8. Electrical Wiring Harness and Ground Point

Connector Connecting to
No. Pole Color Area No. Name
B30 24 * C-1 D1 Front door cord LH
B31 7 Yellow C-1 AB1 SRS (Airbag) harness
B32 3 Black C-1 Turn & hazard module
B33 4 Brown B-1 Diode (Brake fluid level)
B352 Black B-1 Diode (Without step light)
4 Brown B-1 Diode (With step light)
B36 22 Black C-1 i1
Instrument panel wiring
harness B37 22 * C-1 i2
B38 22 Brown C-1 i3
B39 20 Blue C-1 i4
B40 16 Gray C-2 OBD-II service connector
B41 2 * C-2 Power window circuit breaker
B42 4 * C-2Power window and sunroof
relay
B43 6 Black C-2 Illumination control module
B44 8 * C-2 Seat belt timer
B45 4 * B-1 R53 Sunroof cord
B46 4 Green B-1 Fuel pump relay
B47 6 Brown B-1 Main relay
B48 4 Blue B-1 Front fog light relay
B49 3 Black B-1 Horn relay
B50 4 * B-1 Blower relay
B51 11 Gray B-1
F/B
B52 12 Gray B-1
B53 4 * B-2 Shield joint connector (AT)
B54 12 Black B-2
Transmission control module B55 16 Black B-2
B56 20 Black B-2
B57 12 Black B-2 Shift-lock control module
B58 5 Black B-1Headlight alarm relay
(Security)
B59 5 Black B-1 Interrupt relay (Security)
B60 4 * B-2Shield joint connector
(With TCS model)
B61 8 * B-2 F44
Front wiring harness
B62 20 * B-1 F45
B63 40 Gray B-1 P10Floor harness
(With TCS model)
B64 2 Black B-2 Stop light switch
B65 4 Black B-2Stop & brake switch
(With cruise control)
B66 3 Black B-2 Pedal stroke sensor (TCS)
B67 4 Black B-2 Pedal stroke switch (TCS)
B68 5 Black B-3 Slip ring
B69 11 Black B-3
Combination switch B70 9 * B-3
B71 8 * B-3
B72 6 Black B-3 Ignition switch
B73 2 Black B-3 Key lock solenoid (AT)
B74 2 Black B-3 Key warning switchConnector Connecting to
No. Pole Color Area No. Name
B75 2 Green C-2 B76
Test mode connector
B76 2 Green C-3 B75
B77 10 Brown B-2 Mode actuator
B78 9 Yellow C-2 Data link connector
B79 14 Gray C-2 Check connector
B80 4 Blue B-2 i20Instrument panel wiring
harness
B81 1 x 2 * C-2 Diagnosis terminal (Ground)
B82 6 Black C-2 Diagnosis connector
B83 4 * C-3 Shield joint connector (E/G)
B84 96Light
blueB-3 Engine control module
B86 4 * B-3 Blower motor resistor
B87 2 * B-3 Blower motor
B88 3 Black B-3 Evaporator thermoswitch
B89 2 Black B-3 Diode (Security)
B90 4 * B-4 R50 Room light cord
B91 4 * B-4 FRESH/RECIRC actuator
B92 8 * B-4 Door lock timer
B93 16 Black B-4 Security control module
B94 20 Black B-4 Cruise control module
B95 2 Black B-4 Diode (Daytime running light)
B96 10 * B-4Daytime running light control
module
B97 8 * B-4 R1 Rear wiring harness
B9820 * B-4 R2Rear wiring harness
(Other models)
24 Black B-4 R2Rear wiring harness
(2200 cc engine AWD except
Taiwan model)
B99 24 * B-4 R3 Rear wiring harness
B100 20 Blue B-4 F2Front wiring harness
(With ABS model)
B101 24 * B-4 D11 Front door cord RH
B102 5 Black B-4 Daytime running light relay
B103 4 Blue B-4High-beam relay
(Daytime running light)
B104 4 Pink B-4 Rear power supply relay
B105 4 Blue B-1 Starter interlock relay (MT)
B106 2 * B-1 Clutch switch (MT)
B107 2 Blue B-1 Clutch switch (Cruise control)
B108 2 Black B-2 F46Front wiring harness
(Outback)
B109 4 Black C-1 Fuse holder (Outback)
B112 2 Black B-1 Diode (Front fog light)
B113 2 * C-1 D50 Front door cord LH
*: Non-colored
Connector Connecting to
No. Pole Color Area No. Name
S1 3 White D-3 Cruise control sub switch
128
6-3WIRING DIAGRAM
8. Electrical Wiring Harness and Ground Point

Connector Connecting to
No. Pole Color Area No. Name
i1 22 Black C-2 B36
Bulkhead wiring harness i2 22 * C-1 B37
i3 22 Brown C-1 B38
i4 20 Blue C-2 B39
i5 15 Gray C-1 F/B
i6 10 * C-1 Remote control rearview mirror switch
i7 6 Yellow B-2 Front fog light switch
i8 4 Brown B-2 Security indicator light
i9 6 * B-2 TCS off switch
i10 16 Light gray B-2
Combination meter
i11 5 Light blue B-2
i12 16 Light gray B-2 Combination meter
i14 13 * B-2 Combination meter
i15 6 * B-3 Fan switch
i16 3 * B-3 A/C switch
i17 16 * B-3 Mode control panel
i18 6 * B-3 Rear defogger switch
i19 6 Brown B-2 Cruise control main switch
i20 4 Blue B-3 B80 Bulkhead wiring harness
i21 2 Black C-3 Ash tray illumination light
i22 10 * B-3 Hazard switch
i23 2 Brown B-4 Glove box illumination light
i24 1 * C-3
Front accessory power supply
i25 3 * C-3
i26 14 * B-3 Radio
i27 2 * B-3 CD player illumination light
i28 1 Black C-3 Ground
i29 1 Black C-3 Ground (Radio)
i30 4 * B-2 Rear window defogger timer
*: Non-colored
132
6-3WIRING DIAGRAM
8. Electrical Wiring Harness and Ground Point

Connector Connecting to
No. Pole Color Area No. Name
R1 8 * B-2 B97 Bulkhead wiring harness
R224 Black B-2 B98Bulkhead wiring harness
(2200 cc engine AWD except Taiwan model)
20 * B-2 B98 Bulkhead wiring harness (Other models)
R3 24 * B-2 B99 Bulkhead wiring harness
R4 1 Black B-2 Parking brake switch
R5 2 * C-2 Select lever illumination light (AT)
R6 2 Black C-2 Shift lock solenoid (AT)
R7 2 * C-2 P position switch (AT)
R8 2 * C-3 Seat belt switch
R9 1 Brown C-4 Front door switch LH
R10 2 * C-4 D22 Rear door cord LH (Security)
R11 8 * C-4 D21 Rear door cord LH
R12 1 Brown B-2 Front door switch RH
R13 2 * B-2 D28 Rear door cord RH (Security)
R14 8 * B-2 D27 Rear door cord RH
R158 * B-3 R57 Fuel tank cord (2200 cc engine AWD except Taiwan model)
6 Black B-3 R57 Fuel tank cord (Other models)
R16 1 Brown B-3 Rear door switch RH
R29 3 * C-2 Diode (Security)
R30 2 Black C-2 Diode (Rear gate latch switch) (Wagon)
R31 3 * C-2 Diode (Security)
R41 4 Blue B-2 Seat heater (Passenger)
R42 6 * B-3 Seat heater switch (Passenger)
R43 6 Blue B-3 Seat heater switch (Driver)
R44 4 Blue C-3 Seat heater (Driver)
R46 2 * B-3 R67 Fuel tank cord (2200 cc engine AWD except Taiwan model)
R50 4 * B-2 B90 Bulkhead wiring harness
R51 2 * B-2 Vanity mirror illumination light RH
R52 2 * A-3 Room light
R53 4 * C-3 B45 Bulkhead wiring harness
R54 2 * B-3 Vanity mirror illumination light LH
R55 1 * B-3 Sunroof control module
R56 2 * B-3 Spot light
R57 8 * B-3 R15 Rear wiring harness
R58 6 * B-3 Fuel gauge module & fuel pump
R59 2 * B-4 Fuel gauge sub module (AWD)
R67 2 * B-3 R46 Rear wiring harness
R68 2 * B-3 Pressure control solenoid valve
R69 2 * B-3 Vent control solenoid valve
*: Non-colored
136
6-3WIRING DIAGRAM
8. Electrical Wiring Harness and Ground Point

Connector Connecting to
No. Pole Color Area No. Name
P120 Blue B-1 F1Front wiring harness
(With TCS model)
12 * B-1 F1Front wiring harness
(With ABS model)
P2 2 Black C-2 Diode (TCS)
P4 6 * B-3
ABS/TCS control module P5 8 * B-3
P6 16 * B-3
P7 20 * B-3
P82 Gray B-3 Rear ABS sensor RH
2*B-3Rear ABS sensor RH
(Outback with step roof)
P92 Gray B-4 Rear ABS sensor LH
2*B-4Rear ABS sensor LH
(Outback with step roof)
P10 40 Gray B-2 B63Bulkhead wiring harness
(With TCS model)
P11 3 * B-2 ABS G sensor
Connector Connecting to
No. Pole Color Area No. Name
D1 24 * C-3 B30 Bulkhead wiring harness
D2 2 * C-3 Front door speaker LH
D3 2 Green C-3 Front power window motor LH
D4 2 Black B-3 Front tweeter LH
D5 6 * B-3Remote control rearview
mirror LH
D6 2 * B-3 Mirror heater LH
D7 14 * B-3 Power window main switch
D84 * B-3 Front door lock actuator LH
4 Gray B-3Front door lock actuator LH
(With security system)
D9 4 Gray B-3Front door key switch LH
(Security)
D10 2 Black C-3 Step light LH
D11 24 * B-2 B101 Bulkhead wiring harness
Connector Connecting to
No. Pole Color Area No. Name
D12 2 * B-2 Front door speaker RH
D13 2 Green B-2Front power window motor
RH
D14 2 Black B-2 Front tweeter RH
D15 6 * B-2Remote control rearview
mirror RH
D16 2 * B-2 Mirror heater RH
D17 5 * B-2Front power window sub
switch RH
D184 * B-2 Front door lock actuator RH
4 Gray B-2Front door lock actuator RH
(With security system)
D19 4 Gray B-2Front door key switch RH
(Security)
D20 2 Black B-2 Step light RH
D21 8 * B-3 R11 Rear wiring harness
D22 2 * B-3 R10 Rear wiring harness (Security)
D23 2 Black B-4 Rear door speaker LH
D24 2 Green B-4 Rear power window motor LH
D25 5 * B-4Rear power window sub
switch LH
D264 * B-4 Rear door lock actuator LH
4 Gray B-4Rear door lock actuator LH
(With security system)
D27 8 * B-2 R14 Rear wiring harness
D28 2 * B-2 R13 Rear wiring harness (Security)
D29 2 Black B-2 Rear door speaker RH
D30 2 Green B-3 Rear power window motor RH
D31 5 * A-2Rear power window sub
switch RH
D324 * A-3 Rear door lock actuator RH
4 Gray A-3Rear door lock actuator RH
(With security system)
D50 2 * C-2 B113 Bulkhead wiring harness
D51 5 * B-3 Front door lock switch LH
D52 5 * B-2 Front door lock switch RH
*: Non-colored
140
6-3WIRING DIAGRAM
8. Electrical Wiring Harness and Ground Point

Connector Connecting to
No. Pole Color Area No. Name
R17 1 Black A-3 Rear defogger (Power)
R18 2 Black B-3 Rear speaker RH
R19 2 * B-3 High-mounted stop light
R20 2 Blue B-2 Trunk room light
R21 2 Black B-2 Rear speaker LH
R22 1 Brown B-1 Rear door switch LH
R23 3 * B-2 Power antenna
R246 * B-3 R60 Trunk lid cord (Without security system)
8 * B-3 R60 Trunk lid cord (With security system)
R25 2 Black B-4 Rear defogger condenser
R26 4 * B-4 Rear combination light RH
R27 2 * B-4 Trunk room light switch
R28 4 * B-3 Rear combination light LH
R47 3 * B-3 Fuel tank pressure sensor
R606 * B-4 R24 Rear wiring harness (Without security system)
8 * B-4 R24 Rear wiring harness (With security system)
R61 3 * B-4 Key switch (Security)
R62 4 * B-4 Rear finisher light RH
R63 2 * B-3 License plate light
R64 4 * B-3 Rear finisher light LH
R65 1 Black A-2 Rear defogger (Ground)
R66 2 Black B-4 High-mounted stop light (Rear spoiler)
*: Non-colored
144
6-3WIRING DIAGRAM
8. Electrical Wiring Harness and Ground Point

Connector Connecting to
No. Pole Color Area No. Name
R22 1 Brown C-1 Rear door switch LH
R23 6 * C-2 Power antenna
R25 2 Black C-3 Rear defogger condenser
R26 4 Black D-4 Rear combination light RH
R28 4 Black C-2 Rear combination light LH
R32 1 * C-2 Rear accessory power supply (Power)
R33 1 Black C-2 Rear accessory power supply (Ground)
R36 5 Black C-3 Rear wiper relay
R37 2 * C-3 D33
Rear gate cord R38 4 * C-3 D34
R39 8 * C-4 D35
R40 4 Black C-3 D36 Rear gate cord (With security)
R45 6 * C-2 Trailer connector (Outback with step roof)
R47 3 * D-3 Fuel tank pressure sensor
Connector Connecting to
No. Pole Color Area No. Name
D33 2 * C-3 R37
Rear wiring harness D34 4 * C-3 R38
D35 8 * C-4 R39
D36 4 Black C-3 R40 Rear wiring harness (With security)
D37 1 Black B-3
Luggage room light
D38 1 * B-3
D39 2 * B-3 High-mounted stop light
D40 1 Black B-4 Rear defogger (Power)
D41 4 Gray B-4 Key switch (Security)
D42 4 * B-4 Rear finisher light RH
D43 4 * B-3 Rear wiper motor
D44 2 * B-4 License plate light RH
D45 2 * A-3 License plate light LH
D46 2 Black A-4 Rear gate latch switch
D474 * A-4 Rear gate lock actuator (Without security system)
4 Gray A-4 Rear gate lock actuator (With security system)
D48 1 Black B-3 Rear defogger (Ground)
D49 4 * A-3 Rear finisher light LH
*: Non-colored
146
6-3WIRING DIAGRAM
8. Electrical Wiring Harness and Ground Point