sensor SUBARU LEGACY 1996 Service Repair Manual

1. Electrical Components Location
1. LHD MODEL
B5M0402A
Connector No. (AB1) (AB2) (AB3) (AB6) (AB7) (AB8) (AB9) (AB10)
Pole 7 3 3 12 3 3 3 3
Color Yellow Yellow Yellow Yellow Yellow Yellow Yellow Yellow
Male/Female Male Female Female Female Male Male Male Female
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5-5bSUPPLEMENTAL RESTRAINT SYSTEM (ELECTRIC SENSOR TYPE)
1. Electrical Components Location

2. RHD MODEL
B5M0435A
Connector No. (AB1) (AB2) (AB3) (AB6) (AB7) (AB8) (AB9) (AB10)
Pole 7 3 3 12 3 3 3 3
Color Yellow Yellow Yellow Yellow Yellow Yellow Yellow Yellow
Male/Female Male Female Female Female Male Male Male Female
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5-5bSUPPLEMENTAL RESTRAINT SYSTEM (ELECTRIC SENSOR TYPE)
1. Electrical Components Location

2. Schematic
B5M0403A
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5-5bSUPPLEMENTAL RESTRAINT SYSTEM (ELECTRIC SENSOR TYPE)
2. Schematic

3. Tools for Diagnostics
CAUTION:
Be sure to use specified test harness A, B or C when
measuring voltage, resistance, etc. of AIRBAG system
component parts.
A: TEST HARNESS A
B5M0112A
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5-5bSUPPLEMENTAL RESTRAINT SYSTEM (ELECTRIC SENSOR TYPE)
3. Tools for Diagnostics

B: TEST HARNESS B2
G5M0593
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5-5bSUPPLEMENTAL RESTRAINT SYSTEM (ELECTRIC SENSOR TYPE)
3. Tools for Diagnostics

C: TEST HARNESS C
B5M0113A
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5-5bSUPPLEMENTAL RESTRAINT SYSTEM (ELECTRIC SENSOR TYPE)
3. Tools for Diagnostics

D: AIRBAG RESISTOR
The airbag resistor is used during diagnostics. The airbag
resistor has the same resistance as the airbag module and
thus provides safety when used instead of the airbag mod-
ule. It also makes it possible to finish, diagnostics in less
time.
B5M0114A
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5-5bSUPPLEMENTAL RESTRAINT SYSTEM (ELECTRIC SENSOR TYPE)
3. Tools for Diagnostics

4. Diagnostics Chart for On-board
Diagnostic System
A: BASIC DIAGNOSTICS PROCEDURE
1) Airbag warning light comes “ON”.
2) Turn ignition switch to “ON”, (engine “OFF”) and observe airbag warning light.
3) If airbag warning light stays “ON” after 8 seconds or remains “OFF”, or comes back “ON” after 30 seconds, this indicates a current
problem. Proceed to step 8).
If airbag warning light comes “ON” for 8 seconds, then goes out and stays out, this indicates normal system operation at this time.
Check the memory for intermittent problems by performing the procedure outlined in 5-5b [T4B0] “ON-BOARD DIAGNOSTICS”. Pro-
ceed to step 4).
4) If trouble code indicated, proceed to step 5).
If normal code indicated, proceed to step 6).
5) Repair and replacement, proceed to step 7).
6) Repair and replacement, proceed to step 7).
7) Turn ignition switch “ON”, (engine “OFF”) and observe airbag warning light. If airbag warning light stays “ON” after 8 seconds or
comes back “ON” after 30 seconds, proceed to step 8).
If airbag warning light comes “ON” for 8 seconds, then goes out and stays out, proceed to step 9).
8) Repair and replacement. Proceed to step 10).
9) Clear memory. Proceed to step 10).
10) END
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5-5bSUPPLEMENTAL RESTRAINT SYSTEM (ELECTRIC SENSOR TYPE)
4. Diagnostics Chart for On-board Diagnostic System

B5M0115B
B: ON-BOARD DIAGNOSTIC
When the airbag system is in functioning condition, the
airbag warning light will remain on for 8 seconds and go out
when the ignition switch is set to ON.
If there is any malfunction, the airbag warning light will
either stay on or off continuously. In such cases, perform
on-board diagnostic in accordance with the specified pro-
cedure to determine trouble codes.
1) Turn ignition switch ON (with engine OFF).
2) Connect DIAG. terminal

1to No. 1 terminal of diagno-
sis connector

2located below lower cover.
3) Check in accordance with the trouble code indicated by
the AIRBAG warning light, and record the trouble codes.
4) Turn the ignition switch“OFF”and remove the DIAG.
terminal from No. 1 terminal of diagnosis connector.
B5M0116B
C: CLEAR MEMORY
After eliminating problem as per trouble code, clear
memory as follows:
Make sure ignition switch is ON (and engine off). Connect
one DIAG. terminal

1on diagnosis connector
2terminal
No. 1.
While warning light is flashing, connect the other DIAG.
terminal

3on terminal No. 2 for at least three seconds.
After memory is cleared, normal warning light flashing rate
resumes. (Warning light flashes every 0.6 seconds ON-
OFF operation.) Memory cannot be cleared if any problem
exists.
After clear memory and then DIAG. terminals

1and
3,
extract from diagnosis connector

2.
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5-5bSUPPLEMENTAL RESTRAINT SYSTEM (ELECTRIC SENSOR TYPE)
4. Diagnostics Chart for On-board Diagnostic System

D: LIST OF TROUBLE CODES
1. TROUBLE CODES
Trouble code/Contents of troubles Memory function Contents of diagnosis Page
04 Provided.1) Airbag main harness circuit is shorted.
2) Airbag module harness (Ps) circuit is shorted.
3) Airbag control module is faulty.16
11 Provided.1) Airbag control module is faulty.
2) Airbag main harness circuit is open.
3) Fuse No. 8 is blown.
4) Body harness circuit is open.17
12 Provided.1) Airbag main harness circuit is open.
2) Airbag module harness (Dr) circuit is open.
3) Roll connector circuit is open.
4) Airbag control module is faulty.20
13 Provided.1) Airbag main harness circuit is shorted.
2) Airbag module harness (Dr) is shorted.
3) Roll connector circuit is shorted.
4) Airbag control module is faulty.21
14 Not provided.1) (AB9) and (AB10) are not connected properly.
2) (AB2) and (AB7) are not connected properly.
3) (AB3) and (AB8) are not connected properly.
4) (AB6) is not connected properly to airbag control
module.22
21 Provided. Airbag control module is faulty. 24
22 Provided.1) Airbag main harness circuit is open.
2) Airbag module harness (Ps) circuit is open.
3) Airbag control module is faulty.25
31 Not provided.1) Airbag control module is faulty.
2) Airbag main harness circuit is open.
3) Fuse No. 16 is blown.
4) Body harness circuit is open.26
33 Provided. Airbag module is inflated. 28
34 Provided.1) Airbag main harness circuit (Ps) is shorted to
power supply.
2) Airbag module harness (Ps) is shorted to power
supply.
3) Airbag control module is faulty.29
41 Provided.1) Airbag main harness circuit (Dr) is shorted to
ground.
2) Airbag module harness circuit (Dr) is shorted to
ground.
3) Roll connector circuit is shorted to ground.
4) Airbag control module is faulty.30
42 Provided.1) Airbag main harness circuit (Ps) is shorted to
ground.
2) Airbag module harness circuit (Ps) is shorted to
ground.
3) Airbag control module is faulty.31
43 Provided.1) Airbag main harness circuit (Dr) is shorted to
power supply.
2) Airbag module harness (Dr) is shorted to power
supply.
3) Roll connector is shorted to power supply.
4) Airbag control module is faulty.32
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5-5bSUPPLEMENTAL RESTRAINT SYSTEM (ELECTRIC SENSOR TYPE)
4. Diagnostics Chart for On-board Diagnostic System