OD(diag)-18
Subaru Select Monitor
OCCUPANT DETECTION SYSTEM (DIAGNOSTICS)
3. CLEAR MEMORY MODE
Clear the DTC stored in the airbag control module
after repairing the airbag system and occupant de-
tection system. (After the breakdown is recovered,
the breakdown code for completed recoveries are
read out when the next breakdown occurs if the
memory clear work is not performed.)
1) On the «Main Menu» display screen, select the
{Each System Check} and press the [YES] key.
2) On the «System Selection Menu» display
screen, select the {Airbag System} and press the
[YES] key.
3) On the {Airbag System} menu screen, select the
{Clear Memory} and press the [YES] key.
4) When the “Clear Memory?” is shown on the
screen, press the [YES] key.
5) When “Done” is displayed, turn the Subaru Se-
lect Monitor to OFF.
NOTE:
For details concerning operation procedure, refer
to the “SUBARU SELECT MONITOR OPERATION
MANUAL”.
4. SYSTEM CALIBRATION (REZEROING)
NOTE:
When replacing the occupant detection system, or
removing and disassembling the passenger’s seat,
always perform the system calibration after install-
ing a seat in the vehicle.
CAUTION:
When the trouble occurs in the system during
calibration process, “Occupant detection cali-
bration failure” is detected in the DTC 2A of the
airbag system and the airbag warning light
lights. In this case, after turning the ignition
switch to OFF once, redo the system calibration
(Rezeroing), or after clearing the cause of the
failure, perform the system calibration again.
1) Park empty vehicle on a level surface.
2) On the «Main Menu» display screen, select the
{Each System Check} and press the [YES] key.
3) On the «System Selection Menu» display
screen, select the {Occupant Detection System}
and press the [YES] key.
4) On the Occupant Detection System display
screen, select the {Zero Point Adjustment} and
press the [YES] key.
5) “See service manual. And check vehicle condi-
tion for successfully completing the rezeroing.” is
displayed. Check the following to adjust the condi-
tion of the vehicle.
•Adjust the seat backrest to be vertical. (Press the
power seat switch to put the seat in a position
where it will not move.)
•Adjust the seat sliding position to all the way
back. (Press the power seat switch to put the seat
in a position where it will not move.)
•Do not place anything on the top of the seat
cushion.
•Sit on the seat cushion to smooth the seat sur-
face.
•Check that the passenger’s seat belt is not in-
serted into the buckle, not tense or not stuck.
•Check that ambient temperature is in a range
from 0 to 40°C.
6) When the «Re-zeroing Adjust the passenger
seat to the condition shown in service manual» is
displayed, slide the passenger seat all the way to
the back, check that the backrest is adjusted to all
the way up, and press the [YES] key.
7) When the «Re-zeroing Unbelt the Passenger
seatbelt Continue: YES, Quit: NO» is displayed,
make sure the passenger’s seatbelt is disconnect-
ed from the buckle and press the [YES] key.
8) When the «Re-zeroing Empty the passenger
seat Continue: YES, Quit: NO» is displayed, make
sure that the passenger’s seat is empty, air bag
OFF indicator illuminates and air bag ON indicator
does not illuminate, and press the [YES] key.
NOTE:
•After pressing the [YES] key, «Now processing
.... Wait for a while. Do not touch or give impact to
vehicle and seat» is displayed. Do not touch or rock
the vehicle while the message is displayed.
•During the system calibration process, if the
«Re-zeroing is unsuccessful See service manual
Press YES to END» is displayed, go to step 10).
9) When the re-zeroing is ended normally, the«Re-
zeroing is successfully completed Press YES to
END» is displayed. Press the [YES] key and turn
the ignition switch to OFF to finish the diagnosis.
OD-00025
OD(diag)-19
Subaru Select Monitor
OCCUPANT DETECTION SYSTEM (DIAGNOSTICS)
10) During the system calibration process, if the
«Re-zeroing is unsuccessful See service manual
Press YES to END» is displayed, turn the ignition
switch to OFF once and turn it to ON again, and
then read the DTC of airbag system.
tor.>
When DTC is input, fix the fault and then perform
the system calibration. When DTC is not input,
check the seat and vehicle status and then perform
the system calibration again.
TION, Subaru Select Monitor.>
NOTE:
When the re-zeroing is unsuccessful, there could
be occupant detection system failure or improper
seat and vehicle status. When the airbag warning
light illuminates, read the DTC of airbag system,
and perform the diagnosis referring to “List of Diag-
nostic Trouble Code.”
B: INSPECTION
1. COMMUNICATION FOR INITIALIZING
IMPOSSIBLE
DETECTING CONDITION:
Defective harness connector
TROUBLE SYMPTOM:
Communication is impossible between the airbag
control module and the Subaru Select Monitor.
Refer to “Initial Communication Impossible” in the
DTC of the airbag system (diagnosis).
tor.>
2. WITHOUT DTC
DETECTING CONDITION:
•Defective combination meter
•Open circuit of harness
TROUBLE SYMPTOM:
•Airbag warning light remains on.
•“NO TROUBLE CODE” will be displayed on the
Subaru Select Monitor.
For detailed operation procedure, refer to “Airbag
Warning Light Failure”.
NOTE:
When the airbag warning light is OFF and “NO
TROUBLE CODE” is displayed on Subaru Select
Monitor, the system is in normal condition.
OD(diag)-23
Airbag Warning Light Illumination Pattern
OCCUPANT DETECTION SYSTEM (DIAGNOSTICS)
11.Airbag Warning Light Illumi-
nation Pattern
A: INSPECTION
Turn the ignition switch to ON, and confirm that the
airbag warning light remains on for approx. 6 sec-
onds then go off afterwards.
(1) Airbag warning light
(2) Approx. 6 sec.
(3) Ignition switch ON
AB-00135
(1)
(2)
(3)
OFF
ON
OD(diag)-24
Passenger’s Airbag ON/OFF Indicator Illumination Pattern
OCCUPANT DETECTION SYSTEM (DIAGNOSTICS)
12.Passenger’s Airbag ON/OFF Indicator Illumination Pattern
A: INSPECTION
(1) Passenger's airbag ON indicator
light
(4) Ignition switch (9) Adult
(5) Light OFF (10) OFF
(2) Passenger's airbag OFF indicator
light
(6) Light ON (11) ON
(7) Empty (12) Approx. 6 sec.
(3) Occupant seating (8) Child (13) Approx. 2 sec.
(1)
(2)
(3)
(4)(10)
(5)
(5)
(6)
(12)
(6) (6)
(13)(9)
(5)(5)
(10)
(6)
(5)
(6)
(7)
(5)
(7)(8)
(11)
OD-00010
OD(diag)-26
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
OCCUPANT DETECTION SYSTEM (DIAGNOSTICS)
14.Diagnostic Procedure with Diagnostic Trouble Code (DTC)
A: DTC 2A OCCUPANT DETECTION CALIBRATION FAILURE
DTC DETECTING CONDITION:
System calibration (Rezeroing) was not completed normally.
B: DTC 2B ODS ERRONEOUS PARTS
DTC DETECTING CONDITION:
•Wrong airbag control module is installed.
•Wrong occupant detection system is installed.
Step Check Yes No
1PERFORM RE-ZEROING.
Perfor m the system calibration using Subar u
Select Monitor.
Is the system calibration com-
pleted normally?
Finish the diagno-
sis.
Follow the system
calibration proce-
dures.
OPERATION,
Subaru Select
Monitor.>
Step Check Yes No
1CHECK THE OCCUPANT DETECTION SYS-
TEM.
1) Turn the ignition switch to OFF, disconnect
the battery ground cable, and wait more than
20 seconds.
2) Replace the passenger’s seat frame
assembly.
3) Connect the ground cable to battery.
4) Connect Subaru Select Monitor to the vehi-
cle and perform the system calibration.
Monitor.>
Is the system calibration com-
pleted normally?
Finish the diagno-
sis.
Go to step 2.
2CHECK AIRBAG CONTROL SYSTEM.
1) Turn the ignition switch to OFF, disconnect
the battery ground cable, and wait more than
20 seconds.
2) Replace the airbag control module.
3) Connect the ground cable to battery.
4) Connect Subaru Select Monitor to the vehi-
cle and perform the system calibration.
Monitor.>
Is the system calibration com-
pleted normally?
Finish the diagno-
sis.
Check between
the occupant
detection control
module and air-
bag control mod-
ule.
OD(diag)-27
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
OCCUPANT DETECTION SYSTEM (DIAGNOSTICS)
C: DTC 2C BELT TENSION SENSOR FAILURE
DTC DETECTING CONDITION:
•Passenger's seat belt tension sensor is faulty.
•Airbag main harness circuit is open or shorted.
•Occupant detection control module is faulty.
WIRING DIAGRAM:
OD-00022
GOr
FB-47F/B FUSE No.25 (IG)
TO POWER SUPPLY ROUTING
OCCUPANT SENSINGCONTROL MODULE
BELT TENSION SENSOR
3
R
R
5
LW
W
6
LR
RB
4
LY
BW
123
WRBBW
AB61
AB59
AB56
123456
AB61(GRAY)
AB56(BROWN)
123
2
GOr
R
AB55
AB57
Step Check Yes No
1 CHECK POOR CONTACT OF CONNEC-
TORS.
Check for poor contact of the connectors
between the occupant detection control mod-
ule and belt tension sensor.
Is there poor contact? Reconnect the
connector. If the
fault is not fixed,
replace the airbag
harness.
Go to step 2.
2CHECK THE BELT TENSION SENSOR.
1) Turn the ignition switch to OFF, disconnect
the battery ground cable, and wait more than
20 seconds.
2) Disconnect the belt tension sensor connec-
tor (AB56) from the airbag harness.
3) Connect the test harness AC to the con-
nector (AB56).
4) Connect the battery ground terminal and
turn the ignition switch to ON.
Does the airbag warning light
illuminate for approximately 6
seconds and go off?
Replace the seat
belt outer.
Front Seat Belt.>
Go to step 3.
OD(diag)-28
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
OCCUPANT DETECTION SYSTEM (DIAGNOSTICS)
D: DTC 27 ODS COMMUNICATION ERROR
Perform the diagnosis following diagnostic procedure for airbag system.
3 CHECK THE AIRBAG HARNESS.
1) Turn the ignition switch to OFF, disconnect
the battery ground cable, and wait more than
20 seconds.
2) Disconnect the test harness AC from the
belt tension sensor connector (AB56).
3) Connect the test harness AD (1AD) to the
connector (AB56).
4) Disconnect the airbag harness connector
(AB61), and connect the connector (1AB) in
test harness AB.
5) Measure the resistance between test har-
ness terminals.
Connector & terminal
(2AB) No. 5 — (2AD) No. 1:
(2AB) No. 4 — (2AD) No. 3:
(2AB) No. 6 — (2AD) No. 2:
Is the resistance less than 10
Ω?
Go to step 4.Replace the airbag
harness with chas-
sis harness.
4 CHECK THE AIRBAG HARNESS.
Measure the resistance between test harness
terminals, and between test harness terminal
and chassis ground.
Connector & terminal
(2AB) No. 4 — (2AD) No. 1:
(2AB) No. 4 — (2AD) No. 2:
(2AB) No. 4 — chassis ground:
(2AB) No. 5 — (2AD) No. 2:
(2AB) No. 5 — chassis ground:
Is the resistance more than 1
MΩ?
Go to step 5.Replace the airbag
harness with chas-
sis harness.
5 CHECK THE AIRBAG HARNESS.
1) Connect the battery ground terminal and
turn the ignition switch to ON.
2) Measure the voltage between test harness
and chassis ground.
Connector & terminal
(2AD) No. 1 — chassis ground:
(2AD) No. 3 — chassis ground:
Is the voltage less than 1 V? Replace the airbag
harness with chas-
sis harness.
Check the seat
harness, and if any
fault is found,
replace the seat
harness. If no fault
is found in the seat
harness, replace
the seat cushion
frame assembly.
Fr o nt S ea t . >
Step Check Yes No
OD(diag)-30
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
OCCUPANT DETECTION SYSTEM (DIAGNOSTICS)
F: DTC 37 BUCKLE SWITCH RH FAILURE
DTC DETECTING CONDITION:
•Passenger's seat buckle switch circuit is open, shorted or shorted to ground.
•Seat harness circuit is open, shorted or shorted to ground.
•Occupant detection control module is faulty.
WIRING DIAGRAM:
OD-00024
AB60
12
OCCUPANT SENSINGCONTROL MODULE
RONT SEAT BELT SWITCH RH
12
WBr
AB60
Step Check Yes No
1 CHECK POOR CONTACT OF CONNEC-
TORS.
Check for poor contact of the connectors
between the occupant detection control mod-
ule and buckle switch.
Is there poor contact? Reconnect the
connector. If the
fault is not fixed,
replace the airbag
harness.
Go to step 2.
2 CHECK THE BUCKLE SWITCH.
1) Turn the ignition switch to OFF, disconnect
the battery ground terminal, and wait for 20
seconds.
2) Disconnect the buckle switch connector
(AB60).
3) Connect the test harness AE1 and test har-
ness connector Y to the buckle switch connec-
tor (AB60).
4) Connect the battery ground terminal and
turn the ignition switch to ON.
Does the airbag warning light
illuminate for 6 seconds and go
off?
Replace the
buckle switch.
Seat Belt.>
Check the seat
harness, and if any
fault is found,
replace the seat
harness. If the
fault is not fixed,
replace the occu-
pant detection sys-
tem.