AB-12
Inspection Locations After a Collision
AIRBAG SYSTEM
3. Inspection Locations After a
Collision
A: REPLACEMENT
Replace the following parts when the airbag is de-
ployed.
1. FRONT COLLISION
1) Driver’s airbag module
2) Passenger’s airbag module
3) Driver’s seat belt (Pretensioner)
4) Passenger’s seat belt (Pretensioner)
5) Airbag control module
6) Front sub sensor (L/R)
7) Roll connector
8) Instrument panel (for integrating with passen-
ger’s airbag module)
9) Passenger side seat cushion pad and frame as-
sembly
2. SIDE COLLISION
1) Airbag control module
2) Side airbag module (operating side seat back-
rest)
3) Side airbag sensor (operating side)
4) Curtain airbag module (operating side)
5) Curtain airbag sensor (operating side)
3. INSPECTION OF OTHER PARTS
Check for the following parts, and replace the dam-
aged parts with new parts.
1) Steering wheel and steering shaft
Check the steering shaft for mounting conditions
and deflection of front and rear, upward and down-
ward directions, and deflection of front and rear di-
rection with tilt lever released. (After a collision,
there is a good chance that the shock absorbing
part of steering shaft may have operated.)
2) Check the connectors of airbag module, preten-
sioner, etc. for damage, and also check each har-
ness for pinch and connector damage. Replace the
harness as a unit if damage is found.
3) Check the seat cushion frame, backrest, seat rail
and headrest for deformation, distortion, crack, and
installing condition and play.
4) For passengers seat, replace the seat cushion
frame assembly with new one if the seat cushion
frame is deformed or cracked.
5) If there are tears or loosening in the passenger
side seat cushion cover, it may interfere with the
proper operation of the passenger detection sys-
tem. Replace with a new cushion cover.
6) Be sure to perform the system calibration for the
occupant detection system after removing or re-
placing the passenger seat cushion cover. Failure
to do so may cause improper operation of the pas-
senger detection system.
TION, Subaru Select Monitor.>
7) Use the Subaru Select Monitor to check whether
the drivers seat position sensor and the drivers and
the front left/right seat belt buckle switches are op-
erating normally.
B: INSPECTION
If the vehicle is involved in a collision, even if it is a
slight collision, be sure to check the following sys-
tems.
1. DRIVER’S AIRBAG MODULE
1) Check for the following, and replace the dam-
aged parts with new parts.
•Airbag module is cracked or deformed.
•Harness and/or connector is cracked, deformed
or open. Harness wire is exposed.
•The module surface is fouled with grease, oil,
water or cleaning solvent.
2) When installing a new driver’s airbag module,
check for the following, and replace the damaged
parts with new parts.
•The steering wheel is in the way, making it diffi-
cult to install the airbag module.
•The clearance between the driver’s airbag mod-
ule and steering wheel is not constant.
•When steering wheel deformation in axial and
vertical directions exceed limits.
Specification:
Axial deflection A
Less than 6 mm (0.24 in)
Vertical deflection L
Less than 7 mm (0.28 in)
AB-00028
L
A
AB(diag)-34
Subaru Select Monitor
AIRBAG SYSTEM (DIAGNOSTICS)
Step Check Yes No
1CHECK IGNITION SWITCH.Is the ignition switch ON? Go to step 2.Turn the ignition
switch to ON, and
select the airbag
mode using the
Subaru Select
Monitor.
2CHECK BATTERY.
1) Turn the ignition switch to OFF.
2) Measure the battery voltage.
Is the voltage more than 11 V? Go to step 3.Charge or replace
the battery.
3CHECK BATTERY TERMINAL.Is there poor contact at battery
terminal?
Repair or tighten
the battery termi-
nal.
Go to step 4.
4CHECK SUBARU SELECT MONITOR COM-
MUNICATION.
1) Turn the ignition switch to ON.
2) Using the Subaru Select Monitor, check
whether communication to other system can
be executed normally.
Are the system name and
model year displayed on Sub-
aru Select Monitor?
Go to step 9.Go to step 5.
5CHECK AIRBAG CONTROL MODULE CON-
NECTOR.
1) Turn the ignition switch to OFF, disconnect
the battery ground cable, and wait more than
20 seconds.
2) Is the connector of the air bag control mod-
ule (AB6) securely connected?
Is the connector of the air bag
control module securely con-
nected?
Go to step 6.Connect the con-
nector of the air-
bag control
module.
6CHECK SUBARU SELECT MONITOR COM-
MUNICATION.
1) Turn the ignition switch to OFF.
2) Disconnect the airbag control module con-
nector.
3) Turn the ignition switch to ON.
4) Check whether communication to other
systems can be executed normally.
Are the system name and
model year displayed on Sub-
aru Select Monitor?
Replace the airbag
control module.
Module.>
Go to step 7.
7CHECK HARNESS CONNECTOR BETWEEN
EACH CONTROL MODULE AND DATA LINK
CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the airbag control module,
ABSCM&H/U, ECM and TCM.
3) Measure the resistance between data link
connector and chassis ground.
Connector & terminal
(B40) No. 10 — Chassis ground:
Is the resistance more than 1
MΩ?
Go to step 8.Repair the har-
ness and connec-
tor between each
control module
and data link con-
nector. (Replace
the harness with-
out repairing the
airbag harness.)
8CHECK THE OUTPUT SIGNAL TO THE AIR-
BAG CONTROL MODULE.
1) Turn the ignition switch to ON in the status
of step 7.
2) Measure the voltage between data link con-
nector and chassis ground.
Connector & terminal
(B40) No. 10 (+) — Chassis ground (–):
Is the voltage less than 1 V? Go to step 9.Repair the har-
ness and connec-
tor between each
control module
and data link con-
nector. (Replace
the harness with-
out repairing the
airbag harness.)
CC(ETC)(diag)-20
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
CRUISE CONTROL SYSTEM (DIAGNOSTICS)
E: DTC 22 AND 32 VEHICLE SPEED SENSOR
DIAGNOSIS:
Open or short circuit in vehicle speed sensor system.
TROUBLE SYMPTOM:
Cruise control cannot be set. (Cancelled immediately.)
Step Check Yes No
1 CHECK IGNITION SWITCH CIRCUIT
1) Turn the ignition switch to OFF.
2) Disconnect the ECM harness connector.
3) Turn the ignition switch to ON.
4) Measure the voltage between harness con-
nector terminal and chassis ground.
Connector & terminal
(B135) No. 19 (+) — Chassis ground (–):
Is the voltage more than 10 V? Check poor con-
tact of ECM con-
nector.
•Check fuse No.
12 (in fuse & relay
box).
•Check the har-
ness for open or
short circuit
between ignition
switch and ECM.
Step Check Yes No
1CHECK ABS WARNING LIGHT.
1) Turn the ignition switch to ON.
2) After the initial operation of combination
meter is completed, check if the VDC warning
light continues to illuminate.
Does the VDC warning light
continue to illuminate?
Check the
VDCCM.
Basic Diagnostic
Procedure.>
Go to step 2.
2CHECK LAN COMMUNICATION CIRCUIT
ERROR DISPLAY
Check if the communication error is displayed
on the odo/trip meter in combination meter.
Is the error code «Er xx» dis-
played on odo/trip meter?
Check the LAN
communication cir-
cuit.
Diagnostic Proce-
dure.>
Replace the ECM.
Engine Control
Module (ECM).>
LAN(diag)-51
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
LAN SYSTEM (DIAGNOSTICS)
2CHECK STEERING ANGLE SENSOR.
1) Disconnect the steering angle sensor con-
nector (B231).
2) Perform the clear memory mode of body
integrated unit.
Select Monitor.>
3) Read DTC of body integrated unit.
Is DTC (B0202) displayed? Go to step 3.Replace the steer-
ing angle sensor.
Steering Angle
Sensor.>
3CHECK YAW RATE SENSOR
1) Disconnect the yaw rate sensor connector
(B359).
2) Perform the clear memory mode of body
integrated unit.
3) Read DTC of body integrated unit.
Is DTC (B0202) displayed? Go to step 4.Replace the yaw
rate sensor.
REMOVAL, Yaw
Rate & Lateral G
Sensor.>
4CHECK THE BODY INTEGRATED UNIT.
1) Disconnect the body integrated unit con-
nector (B280).
2) Read the data between VDC/ABSCM and
ECM.
Check item:
•Engine speed
•Average front wheel speed (value on con-
stant driving)
Engine speed and front wheel
speed are correctly communi-
cated. (Appears same value)
Replace the body
integrated unit.
Unit.>
Go to step 5.
5CHECK HARNESS.
1) Disconnect the body integrated unit con-
nector (B280).
2) Measure the resistance between harness
connector terminals.
Connector & terminal
(B280) No. 20 — No. 30:
Is the resistance between 55
— 65 Ω?
Go to step 11.Go to step 6.
6CHECK HARNESS.
1) Disconnect the body integrated unit con-
nector (B280).
2) Measure the resistance between harness
connector terminals.
Connector & terminal
(B280) No. 20 — No. 30:
Is the resistance between 115
— 125 Ω?
Go to step 8.Go to step 7.
7CHECK HARNESS.
1) Disconnect the harness connector of body
integrated unit.
2) Measure the resistance between harness
connector terminals.
Connector & terminal
(B280) No. 20 — No. 30:
Is the resistance more than 30
MΩ?
Open circuit in
related line of body
integrated unit.
Repair the open
circuit of harness
or replace har-
ness.
Go to step 8.
8CHECK HARNESS.
1) Disconnect the VDC CM (B310) connector.
2) Measure the resistance between harness
connector terminals.
Connector & terminal
(B310) No. 13 — No. 29:
Is the resistance between 115
— 125 Ω?
Go to step 9.Go to step 10.
9CHECK VDC CM.
1) Disconnect the VDC CM (B310) connector.
2) Measure the resistance between VDC CM
terminals.
Connector & terminal
(B310) No. 20 — No. 34:
Is the resistance between 115
— 125 Ω?
Go to step 10.Open circuit in end
resistance of VDC
CM. Replace the
VDC CM.
trol Module &
Hydraulic Control
Unit (VDCCM&H/
U).>
Step Check Yes No
LAN(diag)-55
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
LAN SYSTEM (DIAGNOSTICS)
M: DTC B0213 CAN-HS VDC/ABS DATA ABNORMAL
DTC DETECTING CONDITION:
VDC CM body has error, the main harness is open or shorted, the connector is not connected properly, or the
terminal has poor caulking.
TROUBLE SYMPTOM:
•ABS warning light and VDC warning light come on.
•“Er HC” or “Er Ab” is displayed in odo/trip meter.
WIRING DIAGRAM:
VDCCM & H/U
B310
B20B30
BODY INTEGRATEDUNIT
B280B:
TCM
B54A:
23
B359
YAW R AT ESENSOR
34
20
B231
21
STEERING ANGLESENSOR
B231
1234
B54A:
12 7 8 9563410 11 1219 20 2113 14 15 16 17 1822 23 24
B136B310
B280B:
5467821931022 23111213141524 25 26 2716171828 29192021 30
ECM
B136
27
35
A3A4
TWISTED PAIR LINE
12345678910 11 12 13 14
15 16 17 18 19 2021 22 23 24 25 26 27 2829 30 31 32 33 3435 36 37 38 39403940
27 28394016101112131415252430
9871718192028212223293231
123456
2726333435
LAN00191
Step Check Yes No
1CHECK VDC CM.
Read the DTC of VDC CM using Subaru
Select Monitor.
Is DTC other than “CAN com-
munication” displayed?
Pe r for m t h e d ia g -
nosis according to
DTC.
Replace the VDC
CM.
Module & Hydrau-
lic Control Unit
(VDCCM&H/U).>
LAN(diag)-61
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
LAN SYSTEM (DIAGNOSTICS)
P: DTC B0223 CAN-HS VDC/ABS NO-RECEIVE DATA
DTC DETECTING CONDITION:
Defective VDC CM. (If error is in the main harness, DTC P0600 High-speed CAN circuit is input at the same
time.)
NOTE:
When more than two DTCs are displayed.
TROUBLE SYMPTOM:
•ABS warning light and VDC warning light come on.
•“Er HC” is displayed in odo/trip meter.
•P0600 (ECM) and C1718 (TCM) are output.
WIRING DIAGRAM:
VDCCM & H/U
B310
B20B30
BODY INTEGRATEDUNIT
B280B:
TCM
B54A:
23
B359
YAW R AT ESENSOR
34
20
B231
21
STEERING ANGLESENSOR
B231
1234
B54A:
12 7 8 9563410 11 1219 20 2113 14 15 16 17 1822 23 24
B136B310
B280B:
5467821931022 23111213141524 25 26 2716171828 29192021 30
ECM
B136
27
35
A3A4
TWISTED PAIR LINE
12345678910 11 12 13 14
15 16 17 18 19 2021 22 23 24 25 26 27 2829 30 31 32 33 3435 36 37 38 39403940
27 28394016101112131415252430
9871718192028212223293231
123456
2726333435
LAN00191
BVC(diag)-5
General Description
BRAKE VACUUM CONTROL (BVC) (DIAGNOSTICS)
3. General Description
A: CAUTION
1. SRS AIRBAG SYSTEM
Airbag system wiring harness is routed near the ABS wheel speed sensor and VDCCM&H/U.
CAUTION:
•All airbag system wiring harness and connectors are colored yellow. Do not use the electrical test
equipment on these circuits.
•Be careful not to damage the airbag system wiring harness.
B: INSPECTION
Before performing diagnosis, check the following items which might affect the brake vacuum control.
1. BATTERY
Measure the battery voltage and check electrolyte.
Standard voltage: 12 V or more
Specific gravity: 1.260 or more
2. BRAKE VACUUM HOSE
Make sure the brake vacuum hose is not cracked or loose.
C: PREPARATION TOOL
1. SPECIAL TOOL
2. GENERAL TOOL
ILLUSTRATION TOOL NUMBER DESCRIPTION REMARKS
18482AA010 CARTRIDGE Troubleshooting for the electrical system.
22771AA030 SUBARU SELECT
MONITOR KIT
Tr o u b l e s h o o t i n g f o r t h e e l e c t r i c a l s y s t e m .
TOOL NAME REMARKS
Circuit tester Used for measuring resistance, voltage and current.
Oscilloscope Used for measuring the sensor.
ST18482AA010
ST22771AA030
DS-13
Front Axle
DRIVE SHAFT SYSTEM
3. Front Axle
A: REMOVAL
1) Disconnect the ground cable from the battery.
2) Lift-up the vehicle, and remove the front wheels.
3) Lift the crimped section of axle nut.
4) Remove the axle nut using a socket wrench
while depressing the brake pedal.
CAUTION:
Remove the wheel before loosening the axle
nut. Failure to follow this rule may damage the
wheel bearings.
5) Remove the stabilizer link.
6) Remove the disc brake caliper from the front
housing, and suspend it from strut using a piece of
wire.
7) Remove the disc rotor from the hub.
NOTE:
If it is difficult to remove the disc rotor from the hub,
drive the 8 mm of bolt into the threaded end of rotor,
then remove the rotor.
8) Remove the cotter pin and castle nut securing
the tierod end to the front housing knuckle arm.
9) Using a puller, remove the tie–rod ball joint from
knuckle arm.
CAUTION:
When removing tie-rod, do not hit the tie-rod
end with hammer.
10) Remove the ABS wheel speed sensor assem-
bly and harness.
DS-00038
FS-00201
DS-00041
(A) Cotter pin
(B) Castle nut
(C) Tie–rod
DS-00042
(C)
(B)
(A)
DS-00043
DS-00249