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05-901
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM 05IVL-03
DTC B1141/33 SIDE AIRBAG SENSOR ASSY (LH)
MALFUNCTION
CIRCUIT DESCRIPTION
The side airbag sensor assy LH consists of the safing sensor, diagnosis circuit and lateral deceleration sen-
sor, etc.
It receives signals from the lateral deceleration sensor, judges whether or not the SRS must be activated,
and detects diagnosis system malfunction.
DTC B1141/33 is recorded when a malfunction is detected in the side airbag sensor assy LH.
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 Side airbag sensor assy LH
nal or a short circuit to B+ signal in the side airbag sensor
B1141/33 S Airbag sensor assy center
assy LH circuit for 2 seconds.
S Floor wire
S Side airbag sensor assy LH malfunction
S Airbag sensor assy center malfunction
WIRING DIAGRAM
S14
Side Airbag Sensor Assy LH Airbag Sensor Assy Center
18
1 GR-L
A20 ESL
ESL
16
4 P-L
A20 VUPL
VUPL
17
3 L-W
A20 SSL+
SSL+
LG-B 20
2
A20 SSL-
SSL-
H43054
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1084
05-902
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.
Side
(b) Clear the DTCs stored in memory (see page 05-777 ).
Airbag
Airbag (c) Turn the ignition switch to the LOCK position.
Sensor
Assy 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 B1141/33 DTC B1141/33 is not output.
HINT:
Codes other than code B1141/33 may be output at this time, but
they are not related to this check.
CG
H01007 TC
H10600 H01066 H40445
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 at least for 90 seconds.
(c) Check that the connectors are properly connected to the airbag sensor assy center and the side airbag
sensor assy LH.
NG CONNECT CONNECTORS, THEN GO TO STEP
1
OK
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1085
05-903
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
3 CHECK FLOOR WIRE(OPEN)
Floor Wire (a) Disconnect the connectors from the airbag sensor assy
center and the side airbag sensor assy LH.
D A Airbag
Sensor (b) Using SST, connect S14-4 (VUPL) and S14-1 (ESL),
C B
Assy and connect S14-3 (SSL+) and S14-2 (SSL-) of connec-
Side Airbag tor "C".
Center
Sensor Assy LH
(c) Measure the resistance according to the value(s) in the
S14
A20 table below.
ESL VUPL SSL- SSL+ Standard:
VUPL Tester connection Condition Specified condition
A20-16 (VUPL) -
Always Below 1
A20-18 (ESL)
A20-17 (SSL+) -
Always Below 1
SST SST SSL+ A20-20 (SSL-)
SSL-
H01010 C91385
C91384 C82600
ESL H43148 NG REPAIR OR REPLACE FLOOR WIRE
OK
4 CHECK FLOOR WIRE(TO GROUND)
(a) Disconnect the SST from connector "C"
Floor Wire
(b) Measure the resistance according to the value(s) in the
D A Airbag table below.
C B Sensor Standard:
Assy Tester connection Condition Specified condition
Side Airbag
Center A20-16 (VUPL) -
Sensor Assy LH Always 1 M or Higher
Body ground
A20 A20-18 (ESL) -
Always 1 M or Higher
Body ground
VUPL
A20-17 (SSL+) -
Always 1 M or Higher
Body ground
A20-20 (SSL-) -
Always 1 M or Higher
Body ground
SSL- SSL+
H01010 ESL NG REPAIR OR REPLACE FLOOR WIRE
C83441 H42231
OK
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1086
05-904
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
5 CHECK FLOOR WIRE(TO B+)
(a) Connect the negative (-) terminal cable to the battery,
Floor Wire
and wait for at least 2 seconds.
D A Airbag (b) Turn the ignition switch to the ON position.
C B Sensor (c) Measure the voltage according to the value(s) in the table
Assy below.
Side Airbag
Center Standard:
Sensor Assy LH
Tester connection Condition Specified condition
A20 A20-16 (VUPL) -
Ignition switch ON Below 1 V
VUPL Body ground
A20-18 (ESL) -
Ignition switch ON Below 1 V
Body ground
A20-17 (SSL+) -
Ignition switch ON Below 1 V
Body ground
SSL- SSL+
A20-20 (SSL-) -
H01010 ESL Ignition switch ON Below 1 V
C83441 H42231 Body ground
NG REPAIR OR REPLACE FLOOR WIRE
OK
6 CHECK FLOOR WIRE(SHORT)
(a) Turn the ignition switch to the LOCK position.
Floor Wire
(b) Disconnect the negative (-) terminal cable from the bat-
D A Airbag tery, and wait for at least 90 seconds.
C B Sensor (c) Measure the resistance according to the value(s) in the
Assy table below.
Side Airbag
Center Standard:
Sensor Assy LH
Tester connection Condition Specified condition
A20 A20-16 (VUPL) -
Always 1 M or Higher
VUPL A20-18 (ESL)
A20-17 (SSL+) -
Always 1 M or Higher
A20-20 (SSL-)
SSL- SSL+
H01010 ESL
C83441 H42231 NG REPAIR OR REPLACE FLOOR WIRE
OK
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1087
05-905
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
7 CHECK SIDE AIR BAG SENSOR ASSY LH
(a) Connect the airbag sensor assy center connector.
Side
(b) Interchange the side airbag sensor assy RH with LH and
Airbag
Airbag connect the connectors to them.
Sensor
Sensor (c) Connect the negative (-) terminal cable to the battery,
Assy RH
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 B1140/32
(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 at for
DTC B1141/33 least 60 seconds.
CG TC (h) Check the DTC (see page 05-777 ).
H01007 Result:
H10600 H01065
H01066 H42116 NG: A DTC B1140/32 is output.
NG: B DTC B1141/33 is output.
DTC B1140/32 and B1141/33 are not
OK
output.
NG:A REPLACE SIDE AIR BAG SENSOR ASSY LH
(SEE PAGE 60-60 )
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 : 1088
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