Ignition system SUBARU FORESTER 1999 Service Workshop Manual

5F510 : CHECK HARNESS CONNECTOR
BETWEEN INTERRUPT RELAY
AND INHIBITOR SWITCH.
1) Turn ignition switch to OFF.
2) Disconnect connector from inhibitor switch.
3) Turn ignition switch to START.
4) Measure voltage between inhibitor switch con-
nector (T7) and chassis ground.
Connector & terminal
(T7) No. 12 (+) Ð Chassis ground (þ):
B6M1425A
:Is the voltage more than 10 V?
: Go to step5F511.
: Repair wiring harness between interrupt
relay and inhibitor switch.
5F511 : CHECK INHIBITOR SWITCH.
1) Place the select lever in the P or N position.
2) Measure resistance between inhibitor switch
terminals.
Terminals
No. 7 Ð No. 12:
B6M1426
:Is the resistance less than 1W?
: Go to step5F512.
: Replace inhibitor switch. [W200].>5F512 : CHECK HARNESS BETWEEN
INHIBITOR SWITCH AND STARTER
MOTOR.
Measure resistance between inhibitor switch con-
nector (T7) and starter motor connector (B14).
Connector & terminal
(T7) No. 7 Ð (B14) No. 1:
B6M1427A
:Is the resistance less than 10W?
: Replace security control module. to 6-2 [W14A1].>
: Repair wiring harness between inhibitor
switch and starter motor.
5F513 : CHECK STARTER INTERLOCK
RELAY.
1) Turn ignition switch to OFF.
2) Remove starter interlock relay.
3) Check continuity between starter interlock relay
terminals.
Terminals
No. 3 Ð No. 2:
B6M1377
:Does continuity exist?
: Go to step5F514.
: Replace starter interlock relay.
86
6-2[T5F5]DIAGNOSTICS
5. Security System

5F517 : CHECK HARNESS BETWEEN
INTERRUPT RELAY AND STARTER
MOTOR.
1) Disconnect connector from starter motor.
2) Turn ignition switch to START.
3) Measure voltage between starter motor con-
nector (B14) and chassis ground while depressing
the clutch pedal.
Connector & terminal
(B14) No. 1 (+) Ð Chassis ground (þ):
B6M1002A
:Is the voltage more than 10 V?
: Replace security control module. to 6-2 [W14A1].>
: Repair wiring harness between interrupt
relay and starter motor.
6. DIAGNOSTICS ITEM 5
5F61 : CHECK HARNESS CONNECTOR
BETWEEN SECURITY CONTROL
MODULE AND COMBINATION
METER.
1) Disconnect connector from security control
module and combination meter.
2) Measure resistance between security control
module connector (B93) and combination meter
connector (i10).
Connector & terminal
(B93) No. 5 Ð (i10) No. 11:
S6M0465A
:Is the resistance less than 10W?
: Go to step5F62.
: Repair wiring harness between security
control module and combination meter.
88
6-2[T5F5]DIAGNOSTICS
5. Security System

1. General
A: PRECAUTION
IIf any of the airbag system parts such as
sensors, airbag module, airbag control module and
harness are damaged or deformed, replace with
new genuine parts.
G5M0291
IWhen servicing, be sure to turn the ignition
switch off, disconnect the negative (þ) battery ter-
minal then the positive (+) terminal in advance, and
wait for more than 20 seconds before starting
work.
G5M0292
IWhen checking the system, be sure to use a
digital circuit tester. Use of an analog circuit tester
may cause the airbag to activate erroneously. Do
not directly apply the tester probe to any connec-
tor terminal of the airbag. When checking, use a
test harness.
G5M0293
G5M0294
3
[W1A0]5-5SERVICE PROCEDURE
1. General

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.
4
5-5[W1A0]SERVICE PROCEDURE
1. General

2. Inspection and Replacement
Standards
A: VEHICLES WHICH BECOME
INVOLVED IN A COLLISION
If the vehicle equipped with an SRS airbag system
is damaged in a collision, the airbag system 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 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
ISide airbag is deployed.
IThe front seat assembly is damaged 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.ISide airbag 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.
IFront or side airbag is deployed.
F: ROLL CONNECTOR
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
ICombination switch or steering roll connector is
deformed or cracked.
5
[W2F2]5-5SERVICE PROCEDURE
2. Inspection and Replacement Standards

6) Using T40 TORXTbit (Tamper resistant type),
remove the four TORXTbolts in numerical
sequence shown in figure. Discard the old TORXT
bolts.
CAUTION:
Use new TORXTbolts during re-assembly.
S5M0219A
7) Install in the reverse order of removal.
7. Side Airbag Sensor
A: REMOVAL AND INSTALLATION
CAUTION:
IIf the side of the vehicle body is damaged by
a collision, be sure to check the left and right
side airbag sensors, even if the airbag was not
inflated. If any damage to the sensor or any
deformation of the sensor mount is found,
replace with a new genuine part.
IWhen painting or performing sheet metal
work on the side part of vehicle body, including
the side sill, center pillar, front and rear doors,
take utmost care not to apply dryer heat, paint-
ing mist, or the flame of the welding burner
directly to the side airbag sensors and wire
harness of the airbag system.
1) Turn ignition switch off.
2) Disconnect ground cable from battery and wait
for at least 20 seconds before starting work.
3) Remove center pillar lower trim. [W5A1].>
4) Detach ELR of front seat belt. [W3A0].>
5) Remove the two TORXTbolts and then detach
side airbag sensor while disconnecting connector.

S5M0308
6) Install in the reverse order of removal.
13
[W7A0]5-5SERVICE PROCEDURE
7. Side Airbag Sensor

9. Front Sub Sensor
A: REMOVAL AND INSTALLATION
CAUTION:
IIf the front end of the vehicle body is dam-
aged by a collision, be sure to check the left
and right front sub sensors, even if the airbag
was not inflated. If any damage to the sensor or
any deformation of the sensor mount is found,
replace with a new genuine part.
G5M0291
IWhen painting or performing sheet metal
work on the front part of vehicle body, includ-
ing the front wheel apron, front fender and
front side frame, take utmost care not to apply
dryer heat, painting mist, or the flame of the
welding burner directly to the front sub sen-
sors and wire harness of the airbag system.
G5M0310
1. FRONT SUB SENSOR HARNESS
1) Turn ignition switch off.
2) Disconnect ground cable from battery and wait
for at least 20 seconds before starting work.3) Remove front side sill cover and then discon-
nect front sub sensor connector. [M2F5].>
B5M0517
4) Remove front wheel and mud guard.
5) Disconnect connector from front sub sensor
assembly.
S5M0335
6) Remove wiring harness clips.
G5M0315
7) Remove grommet and then detach front sub
sensor harness.
G5M0316
8) Install in the reverse order of removal.
16
5-5[W9A0]SERVICE PROCEDURE
9. Front Sub Sensor