078414

ATTENTION:
GENERAL MANAGER
PARTS MANAGER
CLAIMS PERSONNEL
SERVICE MANAGER
q
q
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IMPORTANT - All
Service Personnel
Should Read and
Initial in the boxes
provided, right.
SERVICE INFORMATION
APPLICABILITY:
2010-14MY Legacy and Outback Models
NUMBER: 07-84-14
SUBJECT:	
Revised B1650 Diagnostics and ODS
Rezeroing Procedure
DATE: 03/13/14
INTRODUCTION
This bulletin provides clearer steps for completing the Occupant Detection System (ODS) rezeroing
(system calibration) procedure along with a revised diagnostic chart for DTC B1650 (ODS Failure).
NOTE: Although the Service Manual uses these terms interchangeably throughout ODS diagnosis,
the meaning of the terms “rezeroing”, “rezero” or “system calibration” is all the same.
SERVICE PROCEDURE / INFORMATION
12. System Calibration (Rezeroing)
A: OPERATION
IMPORTANT: When replacing the ODS, or removing and disassembling the passenger’s seat for
any reason, (this includes, but is not limited to seat cover replacement), the rezeroing procedure must
ALWAYS be performed after reinstalling the seat in the vehicle. The rezeroing procedure is not a
“Stand Alone” operation.
Confirm no aftermarket devices are connected to the vehicle. If the DTC is a result of the presence of
an aftermarket device, advise the customer to remove the device from the vehicle to avoid possible
interference with the ODS function.
[VEHICLE PREPARATION]
•
•
•
•
Park empty vehicle on a level surface.
Check that seat temperature is in a range from 0 to 40°C (32 to 104°F).
Remove any weighty objects from the vehicle.
Check and adjust the following items on
the vehicle:
○○ Verify that all ODS-related harnesses and
connectors are fully seated.
○○ Verify that the seat assembly is correctly
installed in the vehicle.
○○ Adjust the seat backrest to be fully upright.
○○ Adjust the seat slide position all the way back.
CAUTION: VEHICLE SERVICING PERFORMED BY UNTRAINED PERSONS COULD
RESULT IN SERIOUS INJURY TO THOSE PERSONS OR TO OTHERS.
Subaru Service Bulletins are intended for use by professional technicians ONLY. They
are written to inform those technicians of conditions that may occur in some vehicles, or
to provide information that could assist in the proper servicing of the vehicle. Properly
trained technicians have the equipment, tools, safety instructions, and know-how
to do the job correctly and safely. If a condition is described, DO NOT assume that this
Service Bulletin applies to your vehicle, or that your vehicle will have that condition.
Bulletin Number: 07-84-14; Date: 03/13/14
Continued...
SUBARU OF AMERICA, INC. IS
“ISO 14001 COMPLIANT”
The international standard for excellence
in Environmental Management Systems.
Please recycle or dispose of automotive
products in a manner that is friendly to our
environment and in accordance with all
local, state and federal laws and regulations.
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Sit on the seat cushion to smooth the seat surface.
Exit the seat.
Do not place anything on the top of the seat cushion.
Check that the passenger’s seat belt is NOT inserted into the buckle and is fully retracted.
NOTE: If the vehicle has been parked outside in temperatures outside the 0° to 40° C (32°-104°
F) range, bring the vehicle into an area within this temperature range, lower all windows and allow
temperature to stabilize. The rezeroing procedure will not be successful if the ODS system is outside
of this range during calibration.
1. Connect the SSMIII and turn the ignition switch ON.
2. On «Main Menu» display, select {Each System Check}.
3. On «System Selection Menu» display, select {Air Bag System}.
4. On the {Air Bag System} display, select {Diagnostic Code(s) Display}.
5. Make sure that none of the following DTCs are current or in memory:
2010 to 2012MY: 27, 29, 2A, 2C, 37 2013 to 2014MY: B1650, B1655, B16EE, B16EF
If any of these DTCs are current or in memory, read the DTC of the airbag system, and perform the
diagnosis while referring to List of Diagnostic Trouble Code (DTC) in the applicable Service Manual.
6. On «Main Menu» display, select {Each System Check}.
7. On «System Selection Menu» display, select {Occupant Detection System}.
8. On the {Occupant Detection System} display, select {Rezeroing}.
NOTE: DO NOT TOUCH THE PASSENGER SEAT OR ROCK THE VEHICLE until the rezeroing
procedure is completed. If you have touched the seat, even if only once, re-perform the steps from the
beginning.
9. Follow to SSMIII screen to perform the rezeroing procedure.
NOTE: When the «Re-zeroing Empty the passenger seat» is displayed, make sure that the
passenger’s seat is empty and airbag “OFF” indicator is illuminated. After verifying the condition,
TURN IGNITION OFF and, within 10 seconds, TURN IGNITION ON again, then select [OK].
10. When the rezeroing procedure completes normally, the «Re-zeroing is successfully
completed» is displayed. Turn the ignition switch to OFF to finish the rezeroing procedure.
11. During the rezeroing procedure, if «Rezeroing is unsuccessful, See service manual» is
displayed, Press ”OK”, and turn the ignition switch to OFF once and wait for a while. Please
repeat the procedure from step 1), making sure to follow each step carefully.
NOTE: There is no limit to the number of rezeroing attempts. If rezeroing is unsuccessful, there is a
possibility that the procedure was not completed correctly.
REMINDER: If are any current or stored DTCs in the ODS system, the rezeroing procedure will
NOT be successful. Repair any faults following the procedures outlined in the applicable Service
Manual then perform the rezeroing procedure.
Continued...
Bulletin Number: 07-84-14; Date: 03/13/14
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The new B1650 diagnostic steps are indicated in RED below.
A: DTC B1650 ODS FAILURE
DTC DETECTING CONDITION:
• Occupant detection sensor is faulty.
• Occupant detection control module is faulty.
• Occupant detection harness is faulty.
• Rear airbag harness (RH) is faulty.
• Communication to occupant detection control module and airbag control module is faulty.
• Airbag control module is faulty.
• Fuse No. 25 (in fuse box) is blown out.
• System calibration (Rezeroing) is unsuccessful.
2 Newly Added Steps
CAUTION:
Before performing diagnosis, refer to “CAUTION” in “General Description”. 
Wiring Diagram:
Occupant Detection System 
STEP
1 CHECK DTC.
Read diagnostic trouble code (DTC) for
the airbag system.
2 CHECK DTC.POOR CONTACT
OF CONNECTORS.
CHECK
Is another DTC
displayed?
Is there poor
Check for poor contact of the connectors contact?
between the occupant detection control
module and the airbag control module.
3 PERFORM RE-ZEROING.
Perform system calibration using
the Subaru Select Monitor.

Newly Added Step
YES
Perform the
diagnosis
according to DTC
NO
Go to step 2.
Reconnect the
connectors. If
defective is not
improved, replace
the airbag rear
Go to step 3.
harness along with
the body harness
or the occupant
detection harness
(Seat harness)
Check the seat
harness, and
Turn the ignition
if any fault is
switch to OFF once found, replace
and turn it to ON
the seat harness.
again.
If the fault is not
Did the system
fixed, replace
It is confirmed to
calibration
the occupant
have turned off
complete properly?
the airbag warning detection system.
lamp.

Continued...
Bulletin Number: 07-84-14; Date: 03/13/14
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STEP
CHECK
YES
NO
4 CHECK AIRBAG REAR HARNESS.
1) Turn the ignition switch to OFF,
disconnect the battery ground cable,
and wait for 60 seconds or more.
2) Disconnect the connectors (AB6,
AB17,AB18) from airbag control
module.
3) Disconnect the connectors (AB59)
and (AB53) under the passenger’s
seat.
4) Connect the connector (1AG) in the
test harness AG to the connectors
(AB6, AB17, AB18).
NOTE: For sedan models, connect test
harness AH between the connectors
(AB6, AB17, AB18) and (1AG).
Is the resistance
less than 10Ω?
Go to step 5.
Replace the
airbag rear
harness along
with body
harness.
Go to step 6.
Repair the
ground circuit.
5) Connect the connector (1AD) in the
test harness AD to the connector
(AB53).
6) Measure the resistance between
connector (6AG) or (5AG) in the test
harness AG and connector (2AD) in
the test harness AD.
Connector & terminal
Sedan model
(5AG) No. 3 — (2AD) No. 2:
(5AG) No. 8 — (2AD) No. 3:
OUTBACK model
(6AG) No. 10 — (2AD) No. 3:
(6AG) No. 12 — (2AD) No. 2:
5 CHECK AIRBAG REAR HARNESS.
Measure the resistance between
connector
(2AD) in the test harness AD and chassis
ground, and between connector (2AD)
Is the resistance
terminals.
1M Ω or less?
Connector & terminal
(2AD) No. 2 — chassis ground:
(2AD) No. 3 — chassis ground:
(2AD) No. 2 — (2AD) No. 3:
Continued...
Bulletin Number: 07-84-14; Date: 03/13/14
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STEP
CHECK
6 CHECK OCCUPANT DETECTION
HARNESS.
1) Turn the ignition switch to ON.
2) Measure the voltage between
connector
(2AD) in the test harness AD and chassis
ground.
Connector & terminal
(2AD) No. 1 (+) — Chassis ground (–):
Bulletin Number: 07-84-14; Date: 03/13/14
Is the voltage 10 V
or more?
YES
NO
Replace the
occupant detection
harness (seat
harness). If
defective is not
improved, replace
the occupant
detection system
(seat cushion &
frame assembly),
and then the airbag
control module in
this order.
Check the battery
voltage and
fuse. If there is
no fault, replace
the airbag rear
harness together
with body
harness.

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