sensor SUBARU FORESTER 1999 Service User Guide

5L8 : FRONT SUB SENSOR HARNESS (LH)
INSPECTION
Measure resistance between test harness I or I2
connector (3I) terminal and test harness H connec-
tor (3H) terminal.
Connector & terminal
(3I) No. 1 Ð (3H) No. 6:
S5M0357A
:Is the resistance less than 10W?
: Go to step5L9.
: Replace front sub sensor harness (LH)
<Ref. to 5-5 [W9A0].> and airbag main
harness. <Ref. to 5-5 [W4A0].>5L9 : FRONT SUB SENSOR HARNESS (LH)
INSPECTION
1) Connect test harness I or I2 connector (1I) and
connector (AB6).
2) Disconnect connector (AB13) from front sub
sensor (LH) <Ref. to 5-5 [W9A0].> and then test
harness H connector (1H) and connector (AB13).
3) Measure resistance between test harness I or
I2 connector (3I) terminal and test harness H con-
nector (3H) terminal.
Connector & terminal
(3I) No. 3 Ð (3H) No. 6:
S5M0421A
:Is the resistance more than 1 MW?
: Go to step5L10.
: Replace front sub sensor harness (LH)
<Ref. to 5-5 [W9A0].> and airbag main
harness. <Ref. to 5-5 [W4A0].>
35
[T5L9]5-5DIAGNOSTICS
5. Diagnostics Chart with Trouble Code

5L10 : FRONT SUB SENSOR HARNESS
(LH) INSPECTION
Measure resistance between test harness I or I2
connector (3I) terminal and test harness H connec-
tor (3H) terminal.
Connector & terminal
(3I) No. 1 Ð (3H) No. 5:
S5M0422A
:Is the resistance more than 1 MW?
: Go to step5L11.
: Replace front sub sensor harness (LH)
<Ref. to 5-5 [W9A0].> and airbag main
harness. <Ref. to 5-5 [W4A0].>
5L11 : FRONT SUB SENSOR HARNESS
(LH) INSPECTION
Measure resistance across test harness I or I2
connector (3I) terminal and chassis ground.
Connector & terminal
(3I) No. 3 (+) Ð Chassis ground (þ):
S5M0358A
:Is the resistance more than 10 kW?
: Go to step5L12.
: Replace front sub sensor harness (LH)
<Ref. to 5-5 [W9A0].> and airbag main
harness. <Ref. to 5-5 [W4A0].>5L12 : FRONT SUB SENSOR HARNESS
(LH) INSPECTION
Measure resistance across test harness I or I2
connector (3I) terminal and chassis ground.
Connector & terminal
(3I) No. 1 (+) Ð Chassis ground (þ):
S5M0359A
:Is the resistance more than 10 kW?
: Go to step5L13.
: Replace front sub sensor harness (LH)
<Ref. to 5-5 [W9A0].> and airbag main
harness. <Ref. to 5-5 [W4A0].>
5L13 : CHECK POOR CONTACT IN CON-
NECTORS (AB11) AND (AB12).
Check connectors (AB11) and (AB12).
:Is there poor contact in connectors
(AB11) and (AB12)?
: Repair poor contact in connectors
(AB11) and (AB12).
: Replace front sub sensor harness (LH)
<Ref. to 5-5 [W9A0].> and airbag main
harness. <Ref. to 5-5 [W4A0].>
36
5-5[T5L10]DIAGNOSTICS
5. Diagnostics Chart with Trouble Code

Q: TROUBLE CODE 51
DIAGNOSIS:
ISide airbag sensor (RH) is faulty.
ISide airbag harness (RH) is faulty.
CAUTION:
Before performing diagnostics on airbag
system, turn ignition switch ªOFFº, disconnect
battery ground cable and then wait at least 20
seconds.
5Q1 : SIDE AIRBAG HARNESS (RH)
INSPECTION
1) Disconnect connector (AB24) and (AB25) at
below front seat on RH side.
2) Disconnect connector (AB18) from airbag con-
trol module and connect it to test harness I or I2
connector (1I).
3) Disconnect connector (AB28) from side airbag
sensor (RH) and connect it to test harness G con-
nector (1G).
4) Measure resistance between test harness I or
I2 connector (3I) terminal and test harness G con-
nector (3G) terminal.
Connector & terminal
(3I) No. 17 Ð (3G) No. 2:
B5M0527B
:Is the resistance less than 10W?
: Go to step5Q2.
: Replace side airbag harness (RH).
<Ref. to 5-5 [W5A0].>5Q2 : SIDE AIRBAG HARNESS (RH)
INSPECTION
Measure resistance between test harness I or I2
connector (3I) terminal and test harness G connec-
tor (3G) terminal.
Connector & terminal
(3I) No. 19 Ð (3G) No. 5:
B5M0528B
:Is the resistance less than 10W?
: Go to step5Q3.
: Replace side airbag harness (RH).
<Ref. to 5-5 [W5A0].>
5Q3 : SIDE AIRBAG HARNESS (RH)
INSPECTION
Measure resistance between test harness I or I2
connector (3I) terminal and test harness G connec-
tor (3G) terminal.
Connector & terminal
(3I) No. 18 Ð (3G) No. 1:
S5M0345A
:Is the resistance less than 10W?
: Go to step5Q4.
: Replace side airbag harness (RH).
<Ref. to 5-5 [W5A0].>
46
5-5[T5Q0]DIAGNOSTICS
5. Diagnostics Chart with Trouble Code

5Q12 : SIDE AIRBAG HARNESS (RH)
INSPECTION
Measure resistance between connector (3I) termi-
nal and chassis ground.
Connector & terminal
(3I) No. 20 (+) Ð Chassis ground (±):
B5M0779A
:Is the resistance more than 1 MW?
: Go to step5Q13.
: Replace side airbag harness (RH).
<Ref. to 5-5 [W5A0].>
5Q13 : SIDE AIRBAG HARNESS (RH)
INSPECTION
Measure resistance between connector (3I) termi-
nal and chassis ground.
Connector & terminal
(3I) No. 17 (+) Ð Chassis ground (±):
B5M0531B
:Is the resistance more than 1 MW?
: Go to step5Q14.
: Replace side airbag harness (RH).
<Ref. to 5-5 [W5A0].>5Q14 : SIDE AIRBAG HARNESS (RH)
INSPECTION
Measure resistance between connector (3I) termi-
nal and chassis ground.
Connector & terminal
(3I) No. 19 (+) Ð Chassis ground (±):
B5M0532B
:Is the resistance more than 1 MW?
: Replace side airbag sensor (RH). <Ref.
to 5-5 [W7A0].> Go to step5Q15.
: Replace side airbag harness (RH).
<Ref. to 5-5 [W5A0].>
5Q15 : SIDE AIRBAG HARNESS (RH)
INSPECTION
1) Connect connector (AB24) and (AB25).
2) Connect connector (AB18) and airbag control
module.
3) Connect connector (AB28) and side airbag sen-
sor.
4) Connect battery ground cable and then turn
ignition switch to ON (engine OFF).
:Does the airbag warning light go off
after about 7 seconds and remain off
for more than 30 seconds?
: Perform clear memory. <Ref. to 5-5
[T4C0].>
: Replace airbag control module. <Ref. to
5-5 [W6A0].>
49
[T5Q15]5-5DIAGNOSTICS
5. Diagnostics Chart with Trouble Code

R: TROUBLE CODE 52
DIAGNOSIS:
ISide airbag sensor (LH) is faulty.
ISide airbag harness (LH) is faulty.
CAUTION:
Before performing diagnostics on airbag
system, turn ignition switch ªOFFº, disconnect
battery ground cable and then wait at least 20
seconds.
5R1 : SIDE AIRBAG HARNESS (LH)
INSPECTION
1) Disconnect connector (AB19) and (AB20) at
below front seat on LH side.
2) Disconnect connector (AB17) from airbag con-
trol module and connect it to test harness I or I2
connector (1I).
3) Disconnect connector (AB23) from side airbag
sensor (LH) and connect it to test harness G con-
nector (1G).
4) Measure resistance between test harness I or
I2 connector (3I) terminal and test harness G con-
nector (3G) terminal.
Connector & terminal
(3I) No. 14 Ð (3G) No. 5:
B5M0533B
:Is the resistance less than 10W?
: Go to step5R2.
: Replace side airbag harness (LH). <Ref.
to 5-5 [W5A0].>5R2 : SIDE AIRBAG HARNESS (LH)
INSPECTION
Measure resistance between test harness I or I2
connector (3I) terminal and test harness G connec-
tor (3G) terminal.
Connector & terminal
(3I) No. 16 Ð (3G) No. 2:
B5M0534B
:Is the resistance less than 10W?
: Go to step5R3.
: Replace side airbag harness (LH). <Ref.
to 5-5 [W5A0].>
5R3 : SIDE AIRBAG HARNESS (LH)
INSPECTION
Measure resistance between test harness I or I2
connector (3I) terminal and test harness G connec-
tor (3G) terminal.
Connector & terminal
(3I) No. 15 Ð (3G) No. 1:
S5M0347A
:Is the resistance less than 10W?
: Go to step5R4.
: Replace side airbag harness (LH). <Ref.
to 5-5 [W5A0].>
50
5-5[T5R0]DIAGNOSTICS
5. Diagnostics Chart with Trouble Code

5R12 : SIDE AIRBAG HARNESS (LH)
INSPECTION
Measure resistance between connector (3I) termi-
nal and chassis ground.
Connector & terminal
(3I) No. 5 (+) Ð Chassis ground (±):
B5M0781A
:Is the resistance more than 1 MW?
: Go to step5R13.
: Replace side airbag harness (LH). <Ref.
to 5-5 [W5A0].>
5R13 : SIDE AIRBAG HARNESS (LH)
INSPECTION
Measure resistance between connector (3I) termi-
nal and chassis ground.
Connector & terminal
(3I) No. 14 (+) Ð Chassis ground (±):
B5M0537B
:Is the resistance more than 1 MW?
: Go to step5R14.
: Replace side airbag harness (LH). <Ref.
to 5-5 [W5A0].>5R14 : SIDE AIRBAG HARNESS (LH)
INSPECTION
Measure resistance between connector (3I) termi-
nal and chassis ground.
Connector & terminal
(3I) No. 16 (+) Ð Chassis ground (±):
B5M0538B
:Is the resistance more than 1 MW?
: Replace side airbag sensor (LH). <Ref.
to 5-5 [W7A0].> Go to step5R15.
: Replace side airbag harness (LH). <Ref.
to 5-5 [W5A0].>
5R15 : SIDE AIRBAG HARNESS (LH)
INSPECTION
1) Connect connector (AB19) and (AB20).
2) Connect connector (AB17) and airbag control
module.
3) Connect connector (AB23) and side airbag sen-
sor.
4) Connect battery ground cable and then turn
ignition switch to ON (engine OFF).
:Does the airbag warning light go off
after about 7 seconds and remain off
for more than 30 seconds?
: Perform clear memory. <Ref. to 5-5
[T4C0].>
: Replace airbag control module. <Ref. to
5-5 [W6A0].>
53
[T5R15]5-5DIAGNOSTICS
5. Diagnostics Chart with Trouble Code

S: TROUBLE CODE 53
DIAGNOSIS:
Side airbag sensor (RH) is faulty.
CAUTION:
Before performing diagnostics on airbag
system, turn ignition switch ªOFFº, disconnect
battery ground terminal, and then wait at least
20 seconds.
5S1 : CHECK IF TROUBLE CODE 53 IS
INDICATED.
Confirm flashing trouble code according to ªBASIC
DIAGNOSTICS PROCEDUREº. <Ref. to 5-5
[T4A0].>
:Is airbag warning light trouble code
53 indicated?
: Replace side airbag sensor (RH). <Ref.
to 5-5 [W7A0].>
: Perform clear memory. <Ref. to 5-5
[T4C0].>
T: TROUBLE CODE 54
DIAGNOSIS:
Side airbag sensor (LH) is faulty.
CAUTION:
Before performing diagnostics on airbag
system, turn ignition switch ªOFFº, disconnect
battery ground terminal, and then wait at least
20 seconds.
5T1 : CHECK IF TROUBLE CODE 54 IS
INDICATED.
Confirm flashing trouble code according to ªBASIC
DIAGNOSTICS PROCEDUREº. <Ref. to 5-5
[T4A0].>
:Is airbag warning light trouble code
54 indicated?
: Replace side airbag sensor (LH). <Ref.
to 5-5 [W7A0].>
: Perform clear memory. <Ref. to 5-5
[T4C0].>
54
5-5[T5S0]DIAGNOSTICS
5. Diagnostics Chart with Trouble Code

U: TROUBLE CODE 55
DIAGNOSIS:
Side airbag module is inflated.
CAUTION:
Before performing diagnostics on airbag
system, turn ignition switch ªOFFº, disconnect
battery ground cable and then wait at least 20
seconds.
5U1 : CHECK IF TROUBLE CODE 55 IS
INDICATED.
Confirm flashing trouble code according to ªBASIC
DIAGNOSTICS PROCEDUREº. <Ref. to 5-5
[T4A0].>
:Is airbag warning light trouble code
55 indicated?
: Replace front seat with side airbag mod-
ule (Operating side) <Ref. to 5-3
[W100].>, side airbag sensor (Operating
side) <Ref. to 5-5 [W7A0].> and airbag
control module. <Ref. to 5-5 [W6A0].>
: Perform clear memory. <Ref. to 5-5
[T4C0].>
V: AIRBAG WARNING LIGHT
REMAINS ON.
DIAGNOSIS:
IAirbag warning light is faulty.
IAirbag control module to airbag warning light
harness circuit is shorted or open.
IGrounding circuit is faulty.
IAirbag control module is faulty.
I(AB1) and (B31) are not connected properly.
I(AB6) is not connected properly to airbag control
module.
CAUTION:
Before performing diagnostics on airbag
system, turn ignition switch ªOFFº, disconnect
battery ground cable and then wait at least 20
seconds.
5V1 : CHECK POOR CONTACT IN CON-
NECTORS (AB1) AND (B31).
1) Remove front pillar lower trim (Driver side).
2) Check poor contact in connectors (AB1) and
(B31).
B5M0122B
:Is there poor contact in double lock
of connectors (AB1) and (B31)?
: Repair poor contact in double lock of
connectors (AB1) and (B31).
: Go to step5V2.
55
[T5V1]5-5DIAGNOSTICS
5. Diagnostics Chart with Trouble Code

X: WARNING LIGHT INDICATES
TROUBLE CODE, THEN NORMAL
CODE. (FLASHING TROUBLE
CODE.)
DIAGNOSIS:
Airbag system component parts are faulty.
CAUTION:
Before performing diagnostics on airbag
system, turn ignition switch ªOFFº, disconnect
battery ground cable, and then wait at least 20
seconds.5X1 : AIRBAG COMPONENT PARTS
APPEARANCE INSPECTION
1) Conduct on-board diagnostic and call up
trouble codes stored in memory. <Ref. to 5-5
[T4B0].>
2) Select trouble code required to check airbag
component parts from those listed in table and
reproduce symptom.
Trouble codes Check parts Index. No.
11IRoll connector
IAirbag module (Driver)
IAirbag main harness
IAirbag control module<Ref. to 5-5 [W800].>
<Ref. to 5-5 [W300].>
<Ref. to 5-5 [W400].>
<Ref. to 5-5 [W600].>
12IAirbag module (Passenger)
IAirbag main harness
IAirbag control module<Ref. to 5-5 [W300].>
<Ref. to 5-5 [W400].>
<Ref. to 5-5 [W600].>
15IAirbag module (Driver)
IRoll connector
IAirbag main harness
IAirbag control module<Ref. to 5-5 [W300].>
<Ref. to 5-5 [W800].>
<Ref. to 5-5 [W400].>
<Ref. to 5-5 [W600].>
16IAirbag main harness
IAirbag module (Passenger)
IAirbag control module<Ref. to 5-5 [W400].>
<Ref. to 5-5 [W300].>
<Ref. to 5-5 [W600].>
21 Airbag control module <Ref. to 5-5 [W600].>
22 Airbag control module <Ref. to 5-5 [W600].>
25IFuse No. 6
IAirbag main harness
IAirbag control module
IBody harness<Ref. to 5-5 [T5J5].>
<Ref. to 5-5 [W400].>
<Ref. to 5-5 [W600].>
<Ref. to 5-3 [W100].>
26 Side airbag module (LH) in front seat <Ref. to 5-3 [W100].>
31IAirbag main harness
IFront sub sensor and front sub sensor harness (RH)<Ref. to 5-5 [W400].>
<Ref. to 5-5 [W900].>
32IAirbag main harness
IFront sub sensor and front sub sensor harness (LH)<Ref. to 5-5 [W400].>
<Ref. to 5-5 [W900].>
41 Side airbag module (RH) in front seat <Ref. to 5-3 [W100].>
42 Side airbag module (LH) in front seat <Ref. to 5-3 [W100].>
45IAirbag control module
ISide airbag module (RH) in front seat<Ref. to 5-5 [W600].>
<Ref. to 5-3 [W100].>
46IAirbag control module
ISide airbag module (LH) in front seat<Ref. to 5-5 [W600].>
<Ref. to 5-3 [W100].>
51ISide airbag sensor (RH)
IAirbag control module<Ref. to 5-5 [W700].>
<Ref. to 5-5 [W600].>
52ISide airbag sensor (LH)
IAirbag control module<Ref. to 5-5 [W700].>
<Ref. to 5-5 [W600].>
53 Side airbag sensor (RH) <Ref. to 5-5 [W700].>
54 Side airbag sensor (LH) <Ref. to 5-5 [W700].>
55 Side airbag module in front seat <Ref. to 5-3 [W100].>
60
5-5[T5X0]DIAGNOSTICS
5. Diagnostics Chart with Trouble Code

1. Combination Meter
A: DIAGNOSTICS PROCEDURE
If speedometer does not operate, or operates
abnormally, check combination meter circuit.
CAUTION:
Make sure that trouble code of vehicle speed
sensor system appears in electrical system on-
board diagnosis.
1A1 : CHECK POWER SUPPLY FOR COM-
BINATION METER.
1) Remove combination meter. <Ref. to 6-2
[W8A0].>
2) Turn ignition switch to ON.
3) Measure voltage between combination meter
connector and chassis ground.
Connector & terminal
(i10) No. 1 (+) Ð Chassis ground (þ):
S6M0430A
:Is the voltage more than 10 V?
: Go to step1A2.
: Repair harness and connector.
NOTE:
In this case, repair the following:
IOpen circuit in harness between combination
meter and battery.
IPoor contact in coupling connectors (i10) and
combination meter connector. <Ref. to FORE-
WORD [W3C0].>1A2 : CHECK POWER SUPPLY FOR COM-
BINATION METER.
Measure voltage between combination meter con-
nector and chassis ground.
Connector & terminal
(i10) No. 2 (+) Ð Chassis ground (þ):
S6M0431A
:Is the voltage more than 10 V?
: Go to step1A3.
: Repair harness and connector.
NOTE:
In this case, repair the following:
IOpen circuit in harness between combination
meter and battery.
IPoor contact in coupling connectors (i10) and
combination meter connector. <Ref. to FORE-
WORD [W3C0].>
1A3 : CHECK GROUND CIRCUIT OF COM-
BINATION METER.
1) Turn ignition switch to OFF.
2) Measure resistance of harness between com-
bination meter connector and chassis ground.
Connector & terminal
(i10) No. 3 (+) Ð Chassis ground (þ):
S6M0432A
:Is the resistance less than 10W?
: Go to step1A4.
: Repair harness and connector.
2
6-2[T1A0]DIAGNOSTICS
1. Combination Meter