SRS SUBARU LEGACY 1999 Service Repair Manual

1. SRS Airbag
B5M0513A
2
5-5[C100]COMPONENT PARTS
1. SRS Airbag

(1) Combination switch ASSY with
roll connector
(2) Airbag module ASSY (Driver)
(3) Airbag module ASSY (Passen-
ger)
(4) BRKT SD A
(5) BRKT P AB (LH)
(6) BRKT B
(7) BRKT P AB (RH)
(8) Side airbag sensor (RH)
(9) Side airbag sensor (LH)(10) Airbag module ASSY (Side)
(11) Extension harness
(12) Protector RH
(13) Airbag main harness
(14) Protector LH
(15) Front sub sensor (LH)
(16) Airbag control module
(17) Front sub sensor (RH)
(18) Front sub sensor harness (LH)
(19) Front sub sensor harness (RH)
(20) Side airbag harness (LH)(21) Side airbag harness (RH)
Tightening torque: N´m (kg-m, ft-lb)
T1:
1.8±0.5 (0.18±0.05, 1.3±0.4)
T2:4.4±1.5 (0.45±0.15, 3.3±1.1)
T3:7.4±0.5 (0.75±0.05, 5.4±0.4)
T4:10±2 (1.0±0.2, 7.2±1.4)
T5:20±4 (2.0±0.4, 14.5±2.9)
T6:32±10 (3.3±1.0, 23.9±7.2)
3
[C100]5-5COMPONENT PARTS
1. SRS Airbag

IDo not drop the airbag modulator parts, subject
it to high temperatures over 90ÉC (194ÉF), or apply
oil, grease, or water to it; otherwise, the internal
parts may be damaged and its reliability greatly
lowered.
G5M0295
IIf any damage or open is found on the SRS air-
bag system wire harness, do not attempt to repair
using soldering, etc. Be sure to replace the faulty
harness with a new genuine part.
G5M0296
IInstall the wire harness securely with the speci-
fied clips so as to avoid interference or jamming
with other parts.
G5M0297
IBefore connecting the airbag system to ground,
make sure that the grounding terminal is free from
paint and contamination.
IDo not allow water or oil to come in contact with
the connector terminals. Do not touch the connec-
tor terminals.
G5M0298
IWhen connecting or disconnecting airbag
connector, make sure ignition switch is OFF.
5
[W100]5-5SERVICE PROCEDURE
1. Precaution

2. Inspection and Replacement
Standards
A: VEHICLES WHICH BECOME
INVOLVED IN A COLLISION
If the vehicle equipped with an SRS airbag sys-
tem is damaged in a collision, the airbag sys-
tem parts must be checked and replaced in
accordance with the following standards:
IAfter faulty parts are replaced, the warning light
operation must be checked.
IWhen the ignition switch is turned ON, it lights
up for about 7 seconds and then it goes out for at
least 30 seconds.
IThe trouble code stored in memory must be
erased after the check.
B: AIRBAG MODULE (DRIVER AND
PASSENGER)
1. INSPECTION STANDARD
IThe vehicle damaged in a frontal collision
(regardless of whether or not airbag is deployed).
IThe designated trouble code is output during
self-diagnosis.
2. REPLACEMENT STANDARD
IAirbag is deployed.
IThe pad surface is scratched or cracked.
IHarness and/or connector is deformed or
cracked, their circuits are broken, lead wire is
exposed, etc.
IMounting bracket is cracked or deformed.
IThe module surface is fouled with foreign mat-
ter. (grease, oil, water, cleaning solvent, etc.)
IAirbag module dropped to the floor/ground.
IAirbag module determined as faulty during self-
diagnosis.
C: AIRBAG MODULE (SIDE)
1. INSPECTION STANDARD
IThe vehicle damaged in a side collision (regard-
less of whether or not airbag is deployed).
IThe designated trouble code is output during
self-diagnosis.
2. REPLACEMENT STANDARD
IAirbag is deployed.
IThe front seat assembly is dameged or
deformed.
IHarness and/or connector is deformed or
cracked, their circuits are broken, lead wire is
exposed, etc.
IMounting bracket is cracked or deformed.IAirbag module determined as faulty during self-
diagnosis.
D: MAIN HARNESS
1. INSPECTION STANDARD
IA vehicle damaged in a collision (regardless of
whether or not airbag is deployed).
IThe designated trouble code is output during
self-diagnosis.
2. REPLACEMENT STANDARD
IHarness circuit is broken, lead wire is exposed,
corrugated tube is cracked, etc.
IConnector is scratched or cracked.
IThe designated trouble code is output during
self-diagnosis.
E: AIRBAG CONTROL MODULE
1. INSPECTION STANDARD
IA vehicle damaged in a collision (regardless of
whether or not airbag is deployed).
IThe designated trouble code is output during
self-diagnosis.
2. REPLACEMENT STANDARD
IControl module is cracked or deformed.
IMounting bracket is cracked or deformed.
IConnector is scratched or cracked.
IControl module dropped to the floor/ground.
IControl module determined as faulty during
diagnostics.
IAirbag is deployed.
F: COMBINATION SWITCH
1. INSPECTION STANDARD
IA vehicle damaged in a collision (regardless of
whether or not airbag is deployed).
IThe designated trouble code is output during
self-diagnosis.
2. REPLACEMENT STANDARD
Combination switch or steering roll connector is
deformed or cracked.
6
5-5[W2A0]SERVICE PROCEDURE
2. Inspection and Replacement Standards

D: BULKHEAD WIRING HARNESS (IN COMPARTMENT)
1. LHD MODEL
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-1Diode (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 Data link connector
B41 2 * C-2Power window circuit
breaker
B42 4 * C-2Power window and sun-
roof relay
B43 6 Black C-2Illumination control mod-
ule
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 6 Gray B-2Shield joint connector
(AT)
B54 24 * B-2
Transmission control
module
B55 24 Gray B-2
B57 12 Black B-2 Shift-lock control module
B59 3 * 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-2Pedal stroke sensor
(TCS)
B67 4 Black B-2Pedal 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 switch
B75 2 Green C-2 B76
Test mode connector
B76 2 Green C-3 B75
B77 10 Brown B-2 Mode actuator
B79 14 Gray C-2 Check connector
B80 4 Blue B-2 i20Instrument panel wiring
harness
Connector Connecting to
No. Pole Color Area No. Name
B81 1´2 * C-2Diagnosis terminal
(Ground)
B82 6 Black C-2 Diagnosis connector
B834 * C-3Shield joint connector
(2500 cc engine model)
6 * D-4Shield joint connector
(2200 cc engine model)
B84 96Light
blueB-3Engine control module
(2500 cc engine model)
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-4FRESH/RECIRC actua-
tor
B92 8 * B-4 Door lock timer
B93 18 * C-2 Security control module
B94 20 Black B-4 Cruise control module
B95 2 Black B-4Diode (Daytime running
light)
B96 10 * B-4Daytime running light
control module
B97 8 * B-4 R1 Rear wiring harness
B98 24 Black B-4 R2 Rear wiring harness
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-4Daytime running light
relay
B103 4 Blue B-4High-beam relay (Day-
time running light)
B104 4 Pink B-4 Rear power supply relay
B105 5 Green B-1Starter interlock relay
(MT)
B106 2 * B-1 Clutch switch (MT)
B107 2 Blue B-1Clutch 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
B134 35 * D-4
Engine control module
(2200 cc engine model) B135 28 * D-4
B136 30 * C-4
B176 16 * B-2Keyless entry control
module
B178 3 * B-4 R85Rear wiring harness
(Wiper deicer)
B183 1 * C-1 B184
Program connector
(Security)
B184 1 * C-1 B183
B205 2 * B-2Keyless entry short con-
nector
*: Non-colored
Connector Connecting to
No. Pole Color Area No. Name
S1 3 White D-3 Cruise control sub switch
150
6-3[D8D1]WIRING DIAGRAM
8. Electrical Wiring Harness and Ground Point

2. RHD MODEL
Connector Connecting to
No. Pole Color Area No. Name
B30 24 * C-4 D1 Front door cord RH
B31 7Yel-
lowC-4 AB1SRS (Airbag) har-
ness
B32 3 Black C-4Turn & hazard mod-
ule
B36 22 Black C-3 i1
Instrument panel
wiring harness B37 22 * C-3 i2
B38 22 Brown C-3 i3
B39 20 Blue C-3 i4
B40 16 Gray C-3 Data link connector
B41 2 * C-3Power window circuit
breaker
B42 4 * C-3 Power window relay
B43 6 Black C-3Illumination control
module
B44 8 * C-3 Seat belt timer
B46 4 Green B-4 Fuel pump relay
B47 6 Brown B-4 Main relay
B49 3 Black B-4 Horn relay
B50 4 * B-4 Blower relay
B51 11 Gray C-4
F/B
B52 12 Gray C-4
B53 6 Gray B-3Shield joint connec-
tor (AT)
B54 24 * B-3
Transmission control
module
B55 24 Gray B-3
B57 12 Black B-3Shift-lock control
module
B61 8 * B-4 F44
Front wiring harness
B62 20 * B-4 F45
B64 2 Black B-3 Stop light switch
B65 4 Black B-3Stop & brake switch
(With cruise control)
B68 5 Black B-3Cruise control sub
switch
B69 11 Black C-3
Combination switch B70 9 * C-3
B71 8 * B-3
B72 6 Black C-3 Ignition switch
B73 2 Black B-3 Key lock solenoid
B74 2 Black B-3 Key warning switch
B75 2 Green B-2 B76
Test mode connector
B76 2 Green B-2 B75
B77 7 * B-2 Mode actuator
B78 9Yel-
lowB-2 Data link connector
B79 14 Gray C-2 Check connector
B80 4 Blue B-2 i20Instrument panel
wiring harnessConnector Connecting to
No. Pole Color Area No. Name
B81 1´2 * B-2Diagnosis terminal
(Ground)
B82 6 Black B-2 Diagnosis connector
B83 6 * C-1Shield joint connec-
tor (E/G)
B85 4 Brown B-3 Diode (Lighting)
B86 4 Black B-1Blower motor resis-
tor
B87 2 Black B-1 Blower motor
B88 3 Black B-1Evaporator ther-
moswitch
B90 2 Green B-4 R50 Room light cord
B91 5 * B-1FRESH/RECIRC
actuator
B92 8 * B-1 Door lock timer
B94 20 Black B-1Cruise control mod-
ule
B97 56 * B-4 R1Rear wiring harness
(S.M.J.)
B101 24 * B-1 D11 Front door cord LH
B111 3 Gray C-4 F/B
B113 2 * C-4 D50 Front door cord RH
B114 2 Black C-3Diode (Door warn-
ing)
B134 35 * C-2
Engine control mod-
ule B135 28 * C-2
B136 30 * C-2
*: Non-colored
152
6-3[D8D2]WIRING DIAGRAM
8. Electrical Wiring Harness and Ground Point