Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Sienna 2004-2007 Approved SRM 04 05 21q2h73z b118856a
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05-1003
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM 05IWM-03
DTC B1188/56 SHORT IN P SQUIB (DUAL STAGE - 2ND
STEP) CIRCUIT (TO B+)
CIRCUIT DESCRIPTION
The P squib (Dual stage - 2nd step) circuit consists of the airbag sensor assy center and the front passenger
airbag assy.
The circuit instructs the SRS to deploy when deployment conditions are met.
DTC B1188/56 is recorded when a short to B+ is detected in the P squib (Dual stage - 2nd step) circuit.
DTC No. DTC Detecting Condition Trouble Area
S The airbag sensor assy center receives a short circuit to
S Front passenger airbag assy (P squib, Dual stage - 2nd
B+ signal in the P squib (Dual stage - 2nd step) circuit for
step)
B1188/56 0.5 seconds.
S Airbag sensor assy center
S P squib (Dual stage - 2nd step) malfunction
S Instrument panel wire
S Airbag sensor assy center malfunction
WIRING DIAGRAM
See page 05-994 .
INSPECTION PROCEDURE
1 CHECK INSTRUMENT PANEL WIRE(P SQUIB, DUAL STAGE - 2ND STEP
CIRCUIT)
(a) Turn the ignition switch to the LOCK position.
P Squib Instrument Panel Wire (b) Disconnect the negative (-) terminal cable from the bat-
(Dual stage tery, and wait for at least 90 seconds.
Airbag
- 2nd step) (c) Disconnect the connectors from the airbag sensor assy
Sensor
A center and the front passenger airbag assy.
Assy
D C B
Center (d) Connect the negative (-) terminal cable to the battery,
and wait for at least 2 seconds.
A23 (e) Turn the ignition switch to the ON position.
(f) Measure the voltage according to the value(s) in the table
below.
P2- Standard:
Tester connection Condition Specified condition
A23-3 (P2+) -
R14286
Ignition switch ON Below 1 V
P2+ Body ground
H41424 H41932
A23-4 (P2-) -
Ignition switch ON Below 1 V
Body ground
NG REPAIR OR REPLACE INSTRUMENT PANEL
WIRE
OK
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1186
05-1004
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
2 CHECK AIR BAG SENSOR ASSY CENTER
P Squib Instrument Panel (a) Turn the ignition switch to the LOCK position.
(Dual stage Wire (b) Disconnect the negative (-) terminal cable from the bat-
Airbag
- 2nd step) tery, and wait for at least 90 seconds.
Sensor
Assy (c) Connect the connector to the airbag sensor assy center.
D C Center (d) Using SST, connect A23-3 (P2+) and A23-4 (P2-) of
connector "C".
A23
P2+ SST 09843-18040
(e) Connect the negative (-) terminal cable to the battery,
and wait for at least 2 seconds.
P2-
(f) Turn the ignition switch to the ON position, and wait for at
SST least 60 seconds.
(g) Clear the DTCs stored in memory (see page 05-777 ).
DLC3 DTC B1188/56 (h) Turn the ignition switch to the LOCK position.
(i) Turn the ignition switch to the ON position, and wait for at
least 60 seconds.
(j) Check the DTCs (see page 05-777 ).
CG TC OK:
H01023
DTC B1188/56 is not output.
H16853
H10600 H16839 H41985 HINT:
Codes other than code B1188/56 may be output at this time, but
they are not related to this check.
NG REPLACE AIR BAG SENSOR ASSY CENTER
(SEE PAGE 60-56 )
OK
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1187
05-1005
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
3 CHECK FRONT PASSENGER AIRBAG ASSY(P SQUIB, DUAL STAGE - 2ND STEP)
(a) Turn the ignition switch to the LOCK position.
P Squib (b) Disconnect the negative (-) terminal cable from the bat-
(Dual stage tery, and wait for at least 90 seconds.
Airbag
- 2nd step) (c) Disconnect the SST from connector "C".
Sensor
Assy (d) Connect the connector to the front passenger airbag
DC Center assy.
(e) Connect the negative (-) terminal cable to the battery,
DLC3 DTC B1188/56 and wait for at least 2 seconds.
(f) Turn the ignition switch to the ON position, and wait for at
least 60 seconds.
(g) Clear the DTCs stored in memory (see page 05-777 ).
(h) Turn the ignition switch to the LOCK position.
CG TC
(i) Turn the ignition switch to the ON position, and wait for at
H01024
H10600 H16839 H42152 least 60 seconds.
(j) Check the DTCs (see page 05-777 ).
OK:
DTC B1188/56 is not output.
HINT:
Codes other than code B1188/56 may be output at this time, but
they are not related to this check.
NG REPLACE FRONT PASSENGER AIRBAG ASSY
(SEE PAGE 60-31 )
OK
USE SIMULATION METHOD TO CHECK (SEE PAGE 05-770 )
HINT:
S Perform the simulation method by selecting the check mode with the hand-held tester (see page
05-780 ).
S After selecting the check mode, perform the simulation method by wiggling each connector of the air-
bag system or driving the vehicle on a city or rough road (see page 05-780 ).
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1188
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