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05-921
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM 05IVQ-03
DTC B1152/28 PASSENGER AIRBAG ON/OFF INDICATOR
CIRCUIT MALFUNCTION
CIRCUIT DESCRIPTION
The passenger airbag ON/OFF indicator circuit consists of the airbag sensor assy center and the passenger
airbag ON/OFF indicator.
This circuit indicates the operation condition of the front passenger airbag assy, the front seat airbag assy
RH and passenger side seat belt pretensioner.
DTC B1152/28 is recorded when a malfunction is detected in the passenger airbag ON/OFF indicator 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 Air conditioning control assy (Passenger airbag ON/OFF
nal or a short circuit to B+ signal in the passenger airbag indicator)
B1152/28
ON/OFF indicator circuit for 2 seconds. S Airbag sensor assy center
S Passenger airbag ON/OFF indicator malfunction S Instrument panel wire
S Airbag sensor assy center malfunction
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1104
05-922
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
WIRING DIAGRAM
A/C Control Airbag Sensor
Assembly Assy Center
20 23 2 25
L-W L-W
PAON A10 A10 IN1 A21 PAON
(*1) (*2)
21 24 7 1
V V
P-AB A10 A10 IN1 A21 P-AB
(*1) (*2) J18
40 12 (*1) J/C
IG (*1) R-Y 119 89 R-Y
IG+ (*2) A9 A9 110
(*1) (*2) (*2)
10 AM1 HTR 28
W-L R-Y
1H 1L
5 3
29 15
B-Y W-B
1H 1L
1 AM1 IG1 2 2 1
IG1 1 27
Relay W-B
1E A21 E1
27 IGN 9 5
B B-O
1H 1E A21 IG2
5 AM2 IG2 6
I15 3 3 28
W-B W-B
Ignition SW 1H 1E A21 E2
W-R
J/C
16 33 1 AM2 1
W-R W
J4 J3 2H 2D
2 1
W-B W-B
FL MAIN 1 FL Block 1
B
F6 F8
Battery
IF IE
*1: Automatic Air Conditioning (Rear)
*2: Manual Air Conditioning (Rear)
H45984
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1105
05-923
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
INSPECTION PROCEDURE
1 CHECK PASSENGER AIRBAG ON/OFF INDICATOR OPERATION
(a) Turn the ignition switch to the ON position.
(b) Check the passenger airbag ON/OFF indicator operation.
HINT:
Refer to the normal condition of the passenger airbag ON/OFF indicator (see page 05-770 ).
A B C
ON
Ignition Switch
OFF
4 sec. 2 sec.
Passenger Airbag ON
ON/OFF Indicator
("ON") OFF
4 sec. 2 sec.
Passenger Airbag ON
ON/OFF Indicator
("OFF") OFF
ON/OFF condition depends on the
front passenger detection results.
H43700
Result:
A:
During period "A" in the illustration, even if both the "ON" and "OFF" passenger airbag ON/OFF
indicators normally come on, both of them do not go off during period "B".
During periods "A" and "B" in the illustration, even if both the "ON" and "OFF" passenger air-
bag ON/OFF indicators normally indicated, both of them come on during period "C".
B:
During period "A", neither the "ON" nor "OFF" passenger airbag ON/OFF indicators come on,
or one of them does not come on.
During period "C", even if the front passenger seat is occupied, neither the "ON" nor "OFF"
passenger airbag ON/OFF indicators come on.
B Go to step 6
A
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1106
05-924
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
2 CHECK AIRCONDITIONER AMPLIFIER ASSY(PASSENGER AIRBAG ON/OFF
INDICATOR)
(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the negative (-) terminal cable from the bat-
tery, and wait for at least 90 seconds.
(c) Disconnect the connector from the airconditioner amplifi-
er assy.
(d) Connect the negative (-) terminal cable to the battery,
and wait for at least 2 seconds.
(e) Turn the ignition switch to the ON position.
H45995 (f) Check the passenger airbag ON/OFF indicator operation.
OK:
The passenger airbag ON/OFF indicator ("ON" and
"OFF") do not come on.
NG REPLACE AIRCONDITIONER AMPLIFIER ASSY
(SEE PAGE 55-25 )
OK
3 CHECK INSTRUMENT PANEL WIRE(TO GROUND)
Passenger Airbag (a) Measure the resistance according to the value(s) in the
Instrument Panel Wire
ON/OFF Indicator table below.
Airbag Standard:
Sensor Tester connection Condition Specified condition
D A
Assy A21-1 (P-AB) -
Always 1 M or Higher
C B Center Body ground
A21-25 (PAON) -
Always 1 M or Higher
Body ground
A21
P-AB
PAON
H01015 H43468
G27651 H40065 H44539 NG REPAIR OR REPLACE INSTRUMENT PANEL
WIRE
OK
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1107
05-925
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
4 CHECK INSTRUMENT PANEL WIRE(SHORT)
Passenger Airbag (a) Measure the resistance according to the value(s) in the
Instrument Panel Wire
ON/OFF Indicator table below.
Airbag Standard:
Sensor Tester connection Condition Specified condition
D A
Assy A21-1 (P-AB) -
Always 1 M or Higher
C B Center A21-25 (PAON)
A21
P-AB
PAON
H01015 H43468
G27651 H40065 H44539 NG REPAIR OR REPLACE INSTRUMENT PANEL
WIRE
OK
5 CHECK AIR BAG SENSOR ASSY CENTER
Passenger Airbag (a) Connect the connectors to the airbag sensor assy center.
ON/OFF Indicator (b) Connect the connector to the airconditioner amplifier
Airbag assy.
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.
DTC B1152/28 (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
least 60 seconds.
(h) Check the DTCs (see page 05-777 ).
CG TC
H43087
OK:
H01012 H43467
H10600 H01069 H44541 DTC B1152/28 is not output.
HINT:
Codes other than code B1152/28 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
USE SIMULATION METHOD TO CHECK (SEE PAGE 05-770 )
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1108
05-926
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
6 WIRE HARNESS(SOURCE VOLTAGE)
(a) Connect the negative (-) terminal cable to the battery,
A9 and wait for at least 2 seconds.
GND
(b) Turn the ignition switch to the ON position.
(c) Measure the voltage and resistance according to the val-
ue(s) in the table below.
Standard:
Tester connection Condition Specified condition
A9-40 (IG) - Body ground Ignition switch ON 10 to 14 V
IG
H45998 A9-1 (GND) -
Always Below 1
Body ground
NG REPLACE A/C AMPLIFIRE ASSY OR WIRE
HARNESS (A/C AMPLIFIRE ASSY - BATTERY)
OR BATTERY
OK
7 CHECK INSTRUMENT PANEL WIRE(OPEN)
(a) Turn the ignition switch to the LOCK position.
Instrument Panel Wire (b) Disconnect the negative (-) terminal cable from the bat-
Airbag tery, and wait for at least 90 seconds.
Passenger
Airbag Sensor (c) Disconnect the connectors from the airbag sensor assy
A Assy
ON/OFF
center and the airconditioner amplifier assy.
Indicator D C B Center
(d) Using a service wire, connect A10- 20 (PAON) and
A10-21 (P-AB) of connector "C".
A10 A21 P-AB NOTICE:
Do not forcibly insert a service wire into the terminals of the
connector when connecting.
(e) Measure the resistance according to the value(s) in the
table below.
PAON P-AB Standard:
Service Wire PAON
H45999 Tester connection Condition Specified condition
A21-1 (P-AB) -
Always Below 1
A21-25 (PAON)
NG REPAIR OR REPLACE INSTRUMENT PANEL
WIRE
OK
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1109
05-927
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
8 CHECK INSTRUMENT PANEL WIRE(TO B+)
Passenger Airbag (a) Disconnect the service wire from connector "C".
Instrument Panel Wire
ON/OFF Indicator (b) Connect the negative (-) terminal cable to the battery,
Airbag and wait for at least 2 seconds.
Sensor (c) Turn the ignition switch to the ON position.
D A
Assy (d) Measure the voltage according to the value(s) in the table
C B Center below.
Standard:
Tester connection Condition Specified condition
A21 A21-25 (PAON) -
P-AB Ignition switch ON Below 1 V
Body ground
PAON A21-1 (P-AB) -
Ignition switch ON Below 1 V
Body ground
H01015 H43468
G27651 H40065 H44539 NG REPAIR OR REPLACE INSTRUMENT PANEL
WIRE
OK
9 CHECK INSTRUMENT PANEL WIRE(AIRBAG SENSOR ASSY CENTER - BODY
GROUND)
(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the negative (-) terminal cable from the bat-
tery, and wait for at least 90 seconds.
(c) Measure the resistance according to the value(s) in the
A21 table below.
Standard:
E2
Tester connection Condition Specified condition
A21-27 (E1) -
E1 Always Below 1
H40065
Body ground
A21-28 (E2) -
Always Below 1
Body ground
NG REPAIR OR REPLACE INSTRUMENT PANEL
WIRE
OK
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1110
05-928
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
10 CHECK AIR BAG SENSOR ASSY CENTER
Passenger Airbag (a) Connect the connectors to the airbag sensor assy center.
ON/OFF Indicator (b) Connect the connector to the airconditioner amplifier
Airbag assy.
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.
DTC B1152/28 (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
least 60 seconds.
(h) Check the DTCs (see page 05-777 ).
CG TC
H43087
OK:
H01012 H43467
H10600 H01069 H44541 DTC B1152/28 is not output.
HINT:
Codes other than code B1152/28 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
USE SIMULATION METHOD TO CHECK (SEE PAGE 05-770 )
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 1111
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