Subaru Legacy IV (2008 year). Manual - part 1039

OD(diag)-21

Passenger’s Airbag ON/OFF Indicator Light Illumination Pattern

OCCUPANT DETECTION SYSTEM (DIAGNOSTICS)

12.Passenger’s Airbag ON/OFF Indicator Light 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)-22

List of Diagnostic Trouble Code (DTC)

OCCUPANT DETECTION SYSTEM (DIAGNOSTICS)

13.List of Diagnostic Trouble Code (DTC)

A: LIST

DTC

Display

Content of diagnosis

Reference

2A

ODS Calibration error

System calibration (Rezeroing) was not completed 
normally.

<Ref. to OD(diag)-23, 
DTC 2A ODS CALIBRA-
TION ERROR, Diagnos-
tic Procedure with 
Diagnostic Trouble Code 
(DTC).>

2B

ODS System wrong parts

• Wrong airbag control module was installed.
• Wrong occupant detection system was installed.
• Occupant detection system is faulty.

<Ref. to OD(diag)-23, 
DTC 2B ODS SYSTEM 
WRONG PARTS, Diag-
nostic Procedure with 
Diagnostic Trouble Code 
(DTC).>

2C

Belt tension Sensor failure

• Passenger’s seat belt tension sensor is faulty.
• Airbag main harness circuit is open or shorted.
• Occupant detection system is faulty.
• Occupant detection harness is faulty.

<Ref. to OD(diag)-24, 
DTC 2C BELT TENSION 
SENSOR FAILURE, 
Diagnostic Procedure 
with Diagnostic Trouble 
Code (DTC).>

27

ODS Communication error

• Occupant detection control module and airbag con-
trol module communication is faulty.
• Airbag rear harness circuit is open, shorted, 
shorted to ground or shorted to power supply.
• Occupant detection harness is faulty.
• Occupant detection system is faulty.
• Airbag control module is faulty.

<Ref. to OD(diag)-25, 
DTC 27 ODS COMMU-
NICATION ERROR, 
Diagnostic Procedure 
with Diagnostic Trouble 
Code (DTC).>

29

ODS failure

• Occupant detection sensor is faulty.
• Occupant detection control module is faulty.
• Occupant detection harness is faulty.
• Fuse No. 25 (in joint box) is blown.

<Ref. to OD(diag)-26, 
DTC 29 ODS FAILURE, 
Diagnostic Procedure 
with Diagnostic Trouble 
Code (DTC).>

37

Buckle Switch RH failure

• Passenger’s buckle switch circuit is open, shorted 
or shorted to ground.
• Occupant detection system is faulty.
• Occupant detection harness is faulty.

<Ref. to OD(diag)-27, 
DTC 37 BUCKLE 
SWITCH RH FAILURE, 
Diagnostic Procedure 
with Diagnostic Trouble 
Code (DTC).>

OD(diag)-23

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

OCCUPANT DETECTION SYSTEM (DIAGNOSTICS)

14.Diagnostic Procedure with Diagnostic Trouble Code (DTC)

A: DTC 2A ODS CALIBRATION ERROR

DTC DETECTING CONDITION:
System calibration (Rezeroing) was not completed properly.

B: DTC 2B ODS SYSTEM WRONG PARTS

DTC DETECTING CONDITION:
• Wrong airbag control module is installed.
• Wrong occupant detection system is installed.

Step

Check

Yes

No

1

PERFORM RE-ZEROING.
Perform system calibration using the Subaru 
Select Monitor. <Ref. to OD(diag)-15, SYSTEM 
CALIBRATION (REZEROING), OPERATION, 
Subaru Select Monitor.>

Did the system calibration com-
plete properly?

Finish the diagno-
sis.

Follow the system 
calibration proce-
dures. <Ref. to 
OD(diag)-15, SYS-
TEM CALIBRA-
TION 
(REZEROING), 
OPERATION, Sub-
aru Select Moni-
tor.>

Step

Check

Yes

No

1

CHECK OCCUPANT DETECTION SYSTEM.
1) Turn the ignition switch to OFF, disconnect 
the battery ground cable, and wait for 20 sec-
onds or more.
2) Replace the passenger’s seat cushion pad 
frame assembly. <Ref. to SE-9, REMOVAL, 
Front Seat.> <Ref. to SE-15, PASSENGER’S 
SEAT, DISASSEMBLY, Front Seat.>
3) Connect the ground cable to battery.
4) Connect Subaru Select Monitor to the vehi-
cle and perform the system calibration. <Ref. to 
OD(diag)-15, SYSTEM CALIBRATION (REZE-
ROING), OPERATION, Subaru Select Moni-
tor.>

Did the system calibration com-
plete properly?

Finish the diagno-
sis.

Go to step 2.

2

CHECK AIRBAG CONTROL SYSTEM.
1) Turn the ignition switch to OFF, disconnect 
the battery ground cable, and wait for 20 sec-
onds or more.
2) Replace the airbag control module. <Ref. to 
AB-20, REMOVAL, Airbag Control Module.>
3) Connect the ground cable to battery.
4) Connect Subaru Select Monitor to the vehi-
cle and perform the system calibration. <Ref. to 
OD(diag)-15, SYSTEM CALIBRATION (REZE-
ROING), OPERATION, Subaru Select Moni-
tor.>

Did the system calibration com-
plete properly?

Finish the diagno-
sis.

Check between the 
occupant detection 
control module and 
airbag control 
module.

OD(diag)-24

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:

FB-47

F/B FUSE NO. 25

(IG)

3

5

6

4

1

2

3

AB53

AB59

AB56

1 2 3
4 5 6

AB53

AB56

1 2 3

OD-00063

9

4

14

16

AB43

AB43

1 2 3

10 11 12

4 5 6

13 14 15

7 8 9

16 17 18

TO POWER SUPPLY 

CIRCUIT

BELT 

TENSION

SENSOR

OCCUPANT DETECTION 

CONTROL MODULE