Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Sienna 2004-2007 Approved SRM 04 05 21q2h73z b115539
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05-946
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM 05IVV-03
DTC B1155/39 AIRBAG SENSOR REAR (LH)
MALFUNCTION
CIRCUIT DESCRIPTION
The airbag sensor rear LH consists of the safing sensor, the diagnostic circuit and the lateral deceleration
sensor, etc.
If the airbag sensor assy center receives signals from the lateral deceleration sensor, it judges whether or
not the SRS should be activated.
DTC B1155/39 is recorded when a malfunction is detected in the airbag sensor rear LH circuit.
DTC No. DTC Detecting Condition Trouble Area
S The airbag sensor assy center receives a line short circuit
signal, an open circuit signal, a short circuit to ground sig-
S Airbag sensor rear LH
nal or a short circuit to B+ signal in the airbag sensor rear
B1155/39 S Airbag sensor assy center
LH circuit for 2 seconds.
S Floor wire
S Airbag sensor rear LH malfunction
S Airbag sensor assy center malfunction
WIRING DIAGRAM
S16
Airbag Sensor Rear LH Airbag Sensor Assy Center
13
G
A20 ESCL
ESCL 1
14
R
A20 VUCL
VUCL 4
1
W
A20 CSL-
CSL- 2
15
W-R
A20 CSL+
CSL+ 3
H43054
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1129
05-947
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
INSPECTION PROCEDURE
1 CHECK DTC
(a) Turn the ignition switch to the ON position, and wait for at
least 60 seconds.
Airbag (b) Clear the DTCs stored in memory (see page 05-777 ).
Sensor Airbag (c) Turn the ignition switch to the LOCK position.
Rear LH Sensor (d) Turn the ignition switch to the ON position, and wait for at
Assy least 60 seconds.
Center (e) Check the DTCs (see page 05-777 ).
OK:
DLC3
DTC B1155/39 DTC B1155/39 is not output.
HINT:
Codes other than code B1155/39 may be output at this time, but
they are not related to this check.
CG TC
H01007
H10600 C92969 H42127
NG Go to step 2
OK
USE SIMULATION METHOD TO CHECK (SEE PAGE 05-770 )
2 CHECK CONNECTION OF CONNECTORS
(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Check that the connectors are properly connected to the airbag sensor assy center and the airbag
sensor rear LH.
OK:
The connectors are connected.
NG CONNECT CONNECTORS, THEN GO TO STEP
1
OK
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1130
05-948
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
3 CHECK FLOOR WIRE(OPEN)
Floor Wire (a) Disconnect the connectors from the airbag sensor assy
center and the airbag sensor rear assy LH.
D A Airbag (b) Using SST, connect S16-1 (VUCL) to S16-4 (ESCL), and
C B Sensor
connect S16-3 (CSL+) to S16-2 (CSL-) of connector "C".
Airbag Sensor Assy
Center
(c) Measure the resistance according to the value(s) in the
Rear LH
table below.
S16 A20 Standard:
ESCL VUCL CSL- CSL+
Tester connection Condition Specified condition
A20-14 (VUCL) -
Always Below 1
CSL- A20-13 (ESCL)
A20-15 (CSL+) -
ESCL Always Below 1
A20-1 (CSL-)
SST SST VUCL
CSL+
H01010 C91385
C91384 C82600 H43148 NG REPAIR OR REPLACE FLOOR WIRE
OK
4 CHECK FLOOR WIRE(TO B+)
(a) Disconnect the SST from connector "C".
Floor Wire (b) Connect the negative (-) terminal cable to the battery,
and wait for at least 2 seconds.
D A Airbag
Sensor (c) Turn the ignition switch to the ON position.
C D
Assy (d) Measure the voltage according to the value(s) in the table
Airbag Sensor
Center below.
Rear LH
Standard:
A20
Tester connection Condition Specified condition
A20-14 (VUCL) -
CSL- Ignition switch ON Below 1 V
Body ground
ESCL A20-13 (ESCL) -
Ignition switch ON Below 1 V
Body ground
VUCL A20-15 (CSL+) -
Ignition switch ON Below 1 V
CSL+ Body ground
H01010
C82600 H42486 A20-1 (CSL-) -
Ignition switch ON Below 1 V
Body ground
NG REPAIR OR REPLACE FLOOR WIRE
OK
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1131
05-949
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
5 CHECK FLOOR WIRE(TO GROUND)
(a) Turn the ignition switch to the LOCK position.
Floor Wire (b) Disconnect the negative (-) terminal cable from the bat-
tery, and wait for at least 90 seconds.
D A Airbag
Sensor (c) Measure the resistance according to the value(s) in the
C B
Assy table below.
Airbag Sensor
Center Standard:
Rear LH
A20 Tester connection Condition Specified condition
A20-14 (VUCL) -
Always 1 M or Higher
Body ground
CSL- A20-13 (ESCL) -
Always 1 M or Higher
Body ground
ESCL
A20-15 (CSL+) -
Always 1 M or Higher
VUCL Body ground
CSL+ A20-1 (CSL-) -
H01010 Always 1 M or Higher
C82600 H42486 Body ground
NG REPAIR OR REPLACE FLOOR WIRE
OK
6 CHECK FLOOR WIRE(SHORT)
(a) Measure the resistance according to the value(s) in the
Floor Wire table below.
Standard:
D A Airbag
C B Sensor Tester connection Condition Specified condition
Assy A20-14 (VUCL) -
Airbag Sensor A20-13 (ESCL)
Always 1 M or Higher
Center
Rear LH
A20 A20-15 (CSL+) -
Always 1 M or Higher
A20-1 (CSL-)
CSL-
ESCL
VUCL
H01010
CSL+
C82600 H42486 NG REPAIR OR REPLACE FLOOR WIRE
OK
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1132
05-950
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
7 CHECK AIR BAG SENSOR REAR LH
(a) Connect the connector to the airbag sensor assy center.
Airbag (b) Interchange the airbag sensor rear LH with RH and con-
Sensor Airbag nect the connectors to them.
Rear RH Sensor (c) Connect the negative (-) terminal cable to the battery,
Assy
and wait for at least 2 seconds.
Center
(d) Turn the ignition switch to the ON position, and wait for at
least 60 seconds.
DLC3 DTC B1154/38 (e) Clear the DTCs stored in memory (see page 05-777 ).
(f) Turn the ignition switch to the LOCK position.
(g) Turn the ignition switch to the ON position, and wait for at
least 60 seconds.
DTC B1155/39
CG TC (h) Check the DTCs (see page 05-777 ).
H01007 Result:
H10600 C92968
C92969 H42128 NG: A DTC B1154/38 is output.
NG: B DTC B1155/39 is output.
DTC B1154/38 and B1155/39 are not
OK
output.
NG:A REPLACE AIR BAG SENSOR REAR LH
(SEE PAGE 60-62 )
NG:B REPLACE AIR BAG SENSOR ASSY CENTER
(SEE PAGE 60-56 )
OK
USE SIMULATION METHOD TO CHECK (SEE PAGE 05-770 )
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1133
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