Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Legacy 1995-1999 Approved Subaru Legacy 1996 1996 Service Manual 1996 LEGACY RHD (RIGHT HAND DRIVE) SERVICE MANUAL SUPPLEMENT Troubleshooting Section MSA5T9603A29723
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5-5b [TaAO] SUPPLEMENTAL RESTRAINT SYSTEM (ELECTRIC SENSOR TYPE)
4. Diagnostics Chart for On-board Diagnostic System
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 [T4B0)tr2 "ON-BOARD
DIAGNOSTICS" . Proceed to step 4) .
4) If trouble code indicated, < Ref. to [T4D1]*2 - [T4D2] .*2> proceed to step 5) .
If normal code indicated, < Ref . to [T4D2] . > proceed to step 6) .
5) Repair and replacement, < Ref . to [T5P1] .*2> proceed to step 7) .
6) Repair and replacement, < Ref . to [T5Q1] .*2> 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 . < Ref . to [T4E1] .*2> Proceed to step 10) .
9) Clear memory . < Ref . to [T4C0] .z`r2> Proceed to step 10) .
10) END
SUPPLEMENTAL RESTRAINT SYSTEM (ELECTRIC SENSOR TYPE) [T4CO] 5-5b
4. Diagnostics Chart for On-board Diagnostic System
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 .
2 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.
L3141 1) Turn ignition switch ON (with engine OFF) .
B5mol15B
2) Connect DIAG . terminal T to No. 1 terminal of diag-
nosis connector ~2 located 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 DIAL .
terminal from No.1 terminal of diagnosis connector .
C: CLEAR MEMORY
After eliminating problem as per trouble code, clear mem-
ory as follows:
Make sure ignition switch is ON (and engine off) . Connect
2 one DIAL . terminal 1Q on diagnosis connector (Z termi-
nal No. 1 .
33 While warning light is flashing, connect the other DIAL .
terminal (Z on terminal No . 2 for at least three seconds.
E;1
1~3141516 After memory is cleared, normal warning light flashing rate
B5M0116B 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 (1) and (3),
extract from diagnosis connector 02 .
9
5-5b [TaD7] SUPPLEMENTAL 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
1) Airbag main harness circuit is shorted .
04 Provided . 2) Airbag module harness (Ps) circuit is shorted . 15
3) Airbag control module is faulty .
1) Airbag control module is faulty .
2) Airbag main harness circuit is open .
11 Provided . 16
3) Fuse No . 8 is blown .
4) Body harness circuit is open .
1) Airbag main harness circuit is open .
2) Airbag module harness (Dr) circuit is open .
12 Provided . 19
3) Roll connector circuit is open .
4) Airbag control module is faulty .
1) Airbag main harness circuit is shorted .
2) Airbag module harness (Dr) is shorted .
13 Provided . 20
3) Roll connector circuit is shorted .
4) Airbag control module is faulty .
1) (AB9) and (AB10) are not connected properly .
2) (AB2) and (AB7) are not connected properly.
14 Not provided . 3) (AB3) and (AB8) are not connected properly . 21
4) (AB6) is not connected properly to airbag control
module .
21 Provided . Airbag control module is faulty . 23
1) Airbag main harness circuit is open .
22 Provided . 2) Airbag module harness (Ps) circuit is open . 24
3) Airbag control module is faulty .
1) Airbag control module is faulty .
21 Airbag main harness circuit is open .
31 Not provided . 25
3) Fuse No . 16 is blown .
4) Body harness circuit is open .
33 Provided . Airbag module is inflated . 27
1) Airbag main harness circuit (Ps) is shorted to
power supply .
34 Provided . 2) Airbag module harness (Ps) is shorted to power 28
supply .
3) Airbag control module is faulty .
1) Airbag main harness circuit (Dr) is shorted to
ground .
2) Airbag module harness circuit (Dr) is shorted to 29
41 Provided .
ground .
3) Roll connector circuit is shorted to ground .
4) Airbag control module is faulty .
1) Airbag main harness circuit (Ps) is shorted to
ground .
42 Provided . 2) Airbag module harness circuit (Ps) is shorted to 30
ground .
3) Airbag control module is faulty .
1) Airbag main harness circuit (Dr) is shorted to
power supply .
2) Airbag module harness (Dr) is shorted to power
43 Provided . 31
supply .
3) Roll connector is shorted to power supply .
4) Airbag control module is faulty .
10
SUPPLEMENTAL RESTRAINT SYSTEM (ELECTRIC SENSOR TYPE) [TaD2] 5-5b
4. Diagnostics Chart for On-board Diagnostic System
Trouble code/Contents of troubles Memory function Contents of diagnosis Page
1) Airbag warning light is faulty .
2) Airbag control module to airbag warning light
harness circuit is shorted or open .
Airbag warning light remains on . Not provided . 32
3) Grounding circuit is faulty.
4) Airbag control module is faulty .
5) (AB1) and (B39) are not connected properly .
1) Fuse No . 15 is blown .
2) Body harness circuit is open .
Airbag warning light remains off . Not provided . 3) Airbag warning light is faulty. 35
4) Airbag main harness is faulty .
5) Airbag control module is faulty .
Warning light indicates trouble code,
then normal code . (Flashing trouble Provided . Airbag system component parts are faulty. 38
code .)
1) Airbag connector is faulty .
Warning light indicates trouble code, 2) Fuse No . 16 is blown .
then normal code . (Flashing normal Not provided . 3) Airbag main harness is faulty . 41
code .) 4) Airbag control module is faulty .
5) Body harness is faulty.
[NOTE] Dr : Driver side Ps : Passenger side
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".
Example:
ON
Flashing 10 1 1 1p ~J ~ LJ 1
code 12: OFF
1 .2 0 .3 0.3 0 .3 0.3 12 (Sec)
ON 1
Flashing 10 10 10
code 21 : OFF
T 12 0.3 1 .2 0.3 70 .3171d (Sec)
.2 _
ON
Flashing
normal OFF
code: 1
0 .6 0.6 (Sec)
85M01 17A
11
5-5b [TaE1) SUPPLEMENTAL RESTRAINT SYSTEM (ELECTRIC SENSOR TYPE)
4. Diagnostics Chart for On-board Diagnostic System
E: DIAGNOSTICS PROCEDURE
1 . AIRBAG WARNING LIGHT STAYS ON AFTER 8
SECONDS .
1) Perform on-board diagnostic . < Ref. to 5-5 [T4130] .
*2>
2) Are trouble codes 4, 12, 13, 22, 34, 41, 42 or 43 indi-
cated? < Ref . to 5-5 [T4D1 ]*2-[T4D2] .*2 >
Record trouble codes . If "YES" proceed to step 4) . If "NO"
proceed to step 3) .
3) Proceed with diagnostics and repair according to trou-
ble code indicated then perform step 15) .
4) If codes 4, 22, 34, 42 are indicated, proceed to step 5) .
If codes 4, 22, 34, 42 are not indicated, proceed to step 10) .
5) If codes 12, 13, 41, 43 are indicated, proceed to step 6) .
If codes 12, 13, 41, 43 are not indicated, proceed to step
11) .
6) Turn ignition switch "OFF", disconnect battery ground
cable, and wait 20 seconds. Disconnect passenger side
airbag module connector (AB9) to (AB10) . < Ref. to 5-5
[W3A2] .*1 > Connect test harness C connector (1 C) to
(AB9).
Connect airbag resistor to test harness C connector (3C) .
Remove lower cover panel and connect test harness C
connector (1C) to (AB8) < Ref . to 5-4 [W1A0) .*1 > with
airbag resistor attached to test harness C connector (3C) .
Connect battery ground cable and turn ignition switch
"ON". Does airbag warning light go "OFF" after 8 seconds
and remain off for more than 30 seconds?
See "NOTE :" .
If "YES" proceed to step 7).
If "NO" proceed to step 3).
7) Turn ignition switch "OFF", disconnect battery ground
cable, and wait 20 seconds . Connect passenger side air-
bag module connector (AB9) to (AB10). Connect battery
ground cable and turn ignition switch "ON" . Does airbag
warning light go "OFF" after 8 seconds and remain off for
more than 30 seconds?
See "NOTE :".
If "YES" proceed to step 8).
If "NO" proceed to step 13) .
12
SUPPLEMENTAL RESTRAINT SYSTEM (ELECTRIC SENSOR TYPE) [T4E1] 5-5b
4. Diagnostics Chart for On-board Diagnostic System
8) Turn ignition switch "OFF", disconnect battery ground
cable, and wait 20 seconds . Connect connector (A138) to
(AB3). Remove driver side airbag module and connect test
harness C connector (1C) to (AB7). < Ref. to 5-5
[W3A1] .*1 >
Connect airbag resistor to test harness C connector (3C) .
Connect battery ground cable and turn ignition switch
"ON" . Does airbag warning light go "OFF" after 8 seconds
and remain off for more than 30 seconds?
See "NOTE :" .
If "YES" proceed to step 9) .
If "NO" proceed to step 14) .
9) Turn ignition switch "OFF", disconnect battery ground
cable, and wait 20 seconds. Replace with a new driver side
airbag module. < Ref. to 5-5 [W3A1 ] .*1 > Proceed to step
15).
10) Turn ignition switch "OFF", disconnect battery
ground cable, and wait 20 seconds. Remove lower cover
panel and connect test harness C connector (1C) to (AB8)
< Ref. to 5-4 [W1A0] .*1 > with airbag resistor attached to
test harness C connector (3C) .
Connect battery ground cable and turn ignition switch
"ON" . Does airbag warning light go "OFF" after 8 seconds
and remain off for more than 30 seconds?
See "NOTE:".
If "YES" proceed to step 8) .
If "NO" proceed to step 3) .
13
5-5b [T4Ey] SUPPLEMENTAL RESTRAINT SYSTEM (ELECTRIC SENSOR TYPE)
4. Diagnostics Chart for On-board Diagnostic System
11) Turn ignition switch "OFF", disconnect battery
ground cable, and wait 20 seconds. Disconnect passen-
ger side airbag module connector (AB9) to (AB10). < Ref.
to 5-5 [W3A2] .*1 >
Connect test harness C connector (1C) to (AB9) . Connect
airbag resistor to test harness C connector (3C) .
Connect battery ground cable and turn ignition switch
"ON". Does airbag warning light go "OFF" after 8 seconds
and remain off for more than 30 seconds?
See "NOTE :".
If "YES" proceed to step 12) .
If "NO" proceed to step 3) .
12) Turn ignition switch "OFF", disconnect battery
ground cable, and wait 20 seconds. Replace with a new
passenger side airbag module < Ref. to 5-5 [W3A2] .*1 >
then proceed to step 15) .
13) Turn ignition switch "OFF", disconnect battery
ground cable and wait 20 seconds. Replace with a new
passenger side airbag module < Ref. to 5-5 [W3A2] .*1 >
then proceed to step 7) .
14) Turn ignition switch "OFF", disconnect battery
ground cable, and wait 20 seconds. Replace with a new
combination switch, < Ref. to 5-5 [W7A0] .*2 > and install
driver side airbag module < Ref. to 5-5 [W3A1 ] .*1 > .
Connect battery ground cable and turn ignition switch
"ON" . Does airbag warning light go "OFF" after 8 seconds
and remain off for more than 30 seconds?
See "NOTE:" .
If "YES" proceed to step 16) .
If "NO" proceed to step 9) .
15) Connect battery ground cable and turn ignition
switch "ON" . Does airbag warning light go "OFF" after 8
seconds and remain off for more than 30 seconds? See
"NOTE:" .
If "YES" proceed to step 16) .
If "NO" proceed to step 1).
16) Perform clear memory procedure. < Ref. to 5-5
[T4C0] .*2 >
If memory cannot be cleared, another trouble code exists .
Return to step 1) .
If memory can be cleared, proceed to step 17) .
17) END
NOTE :
e Always remember to secure the green double locks
before turning the ignition switch "ON" .
9 In some cases the airbag warning light will go "OFF"
after 8 seconds but will turn "ON" again within 30 sec-
onds . In this case continue diagnostics with the basic
diagnostics procedures or trouble code procedures .
14
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