Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Sienna 2004-2007 Approved SRM 04 05 21q2h73z b114836
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05-906
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM 05NSY-01
DTC B1148/36 FRONT AIRBAG SENSOR (RH)
MALFUNCTION
CIRCUIT DESCRIPTION
The airbag front RH sensor circuit consists of the diagnostic circuit and the frontal deceleration sensor, etc.
If the airbag sensor assy center receives signals from the frontal deceleration sensor, it judges whether or
not the SRS should be activated.
DTC B1148/36 is recorded when a malfunction is detected in the front airbag sensor RH circuit.
DTC No. DTC Detecting Condition Trouble Area
S The airbag sensor assy center receives an open circuit S Airbag sensor front RH
signal in the front airbag sensor RH circuit for 2 seconds. S Airbag sensor assy center
B1148/36
S Airbag sensor front RH malfunction S Instrument panel wire
S Airbag sensor assy center malfunction S Engine room main wire
WIRING DIAGRAM
A8
Airbag Sensor Front RH Airbag Sensor Assy Center
2 9
B-W B-W
+SR IK2 A21 +SR
2
1 BR-W 20
BR-W
-SR IK2 A21 -SR
1
H02750
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1089
05-907
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
INSPECTION PROCEDURE
1 CHECK DTC
(a) Turn the ignition switch to the ON position, and wait for at
Airbag Airbag least 60 seconds.
Sensor Sensor (b) Clear the DTCs stored in memory (see page 05-777 ).
Front Assy (c) Turn the ignition switch to the LOCK position.
RH Center (d) Turn the ignition switch to the ON position, and wait for at
least 60 seconds.
(e) Check the DTCs (see page 05-777 ).
OK:
DLC3 DTC B1148/36 DTC B1148/36 is not output.
HINT:
Codes other than code B1148/36 may be output at this time, but
they are not related to this check.
CG TC
H02757
H10600 H16834 H42117
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 front
RH sensor.
OK:
The connectors are connected.
NG CONNECT CONNECTORS, THEN GO TO STEP
1
OK
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1090
05-908
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
3 CHECK FRONT AIRBAG SENSOR (RH) CIRCUIT (OPEN)
(a) Disconnect the connectors from the airbag sensor assy
Airbag Airbag center and the airbag front RH sensor.
Sensor Sensor (b) Using a service wire, connect A8-2 (+SR) and A8-1 (-
Front F
A
Assy SR) of connector "E".
RH E DC B Center NOTICE:
Do not forcibly insert a service wire into the terminals of the
-SR +SR A21
connector when connecting.
A8
(c) Measure the resistance according to the value(s) in the
table below.
+SR Standard:
-SR Tester connection Condition Specified condition
A21-9 (+SR) -
Service Wire Always Below 1
A21-20 (-SR)
H03353
H08016 C81408 H41800 NG Go to step 5
OK
4 CHECK AIRBAG SENSOR FRONT RH
(a) Connect the connector to the airbag sensor assy center.
Airbag
Airbag Sensor
(b) Interchange the airbag sensor front RH with LH and con-
Sensor
Assy nect the connectors to them.
Front LH DC Center (c) Connect the negative (-) terminal cable to the battery,
and wait for at least 2 seconds.
(d) Turn the ignition switch to the ON position, and wait for at
DTC B1148/36 least 60 seconds.
(e) Clear the DTCs stored in memory (see page 05-777 ).
DLC3 (f) Turn the ignition switch to the LOCK position.
(g) Turn the ignition switch to the ON position, and wait for at
DTC B1149/37 least 60 seconds.
CG
(h) Check the DTCs (see page 05-777 ).
TC
Result:
H02757
H10600 H16834
H16835 H42118 NG: A DTC B1149/37 is output.
NG: B DTC B1148/36 is output.
DTC B1148/36 and B1149/37 are not
OK
output.
NG:A REPLACE AIRBAG SENSOR FRONT RH
(SEE PAGE 60-58 )
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 : 1091
05-909
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
5 CHECK ENGINE ROOM MAIN WIRE(OPEN)
Engine Room (a) Disconnect the engine room main wire connector from the
Instrument Panel Wire
Main Wire instrument panel wire.
Airbag Airbag
HINT:
Sensor Sensor
Front
F A The service wire has already been inserted into connector "E".
Assy
RH E D C B (b) Measure the resistance according to the value(s) in the
Center
table below.
IK2 Standard:
-SR A8 +SR
Tester connection Condition Specified condition
IK2-2 (+SR) -
Always Below 1
IK2-1 (-SR)
+SR -SR
NG REPAIR OR REPLACE ENGINE ROOM MAIN
H03352 Service Wire WIRE
H42827 H45962
OK
REPAIR OR REPLACE INSTRUMENT PANEL WIRE
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1092
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