Page 1377 of 5135

H42148
DLC3 Airbag
Sensor
Assy
Center
TC
CGDTC B1186/58
P Squib
(2nd step)
C
D
±
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
05±1367
AVENSIS REPAIR MANUAL (RM1018E)
3 CHECK INSTRUMENT PANEL PASSENGER AIR BAG ASSY(P SQUIB, 2ND STEP)
(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) Connect the connector to the instrument panel passen- ger airbag 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, and wait for at least 10 seconds.
(f)Clear the stored DTCs in the memory (See page 05±1184).
(g) Turn the ignition switch to the LOCK position.
(h) Turn the ignition switch to the ON position, and wait for at least 10 seconds.
(i)Check the DTCs (See page 05±1184). OK:
DTC B1186/58 is not output.
HINT:
Codes other than code B1186/58 may be output at this time, but
they are not related to this check.
NG REPLACE INSTRUMENT PANEL PASSENGER AIR BAG ASSY
OK
USE SIMULATION METHOD TO CHECK
Page 1378 of 5135
H01454
A29
P Squib (2nd step)Airbag Sensor Assy Center
Y
Y±B 3
48
P2+ A27
P2± 7
A27 05±1362
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
DTC B1185/57 SHORT IN P SQUIB (2ND STEP) CIRCUIT
CIRCUIT DESCRIPTION
The P squib (2nd step) circuit consists of the airbag sensor assy center and the instrument panel passenger
airbag assy.
This circuit actuates the SRS to deploy when the SRS deployment conditions are fulfilled.
DTC B1185/57 is recorded when a short circuit is detected in the P squib (2nd step) circuit.
DTC No.DTC Detecting ConditionTrouble Area
B1185/57
Short circuit between P2+ wire harness and P2± wire harness
of P squib (2nd step)
P squib (2nd step) malfunction
Airbag sensor assy center malfunctionInstrument panel passenger airbag assy (P squib, 2nd step)
Airbag sensor assy center
Instrument panel wire
WIRING DIAGRAM
056MX±03
Page 1379 of 5135

\b H40583
P Squib
(2nd step)Airbag
Sensor
Assy
Center
P2+
P2±
Instrument Panel Wire
A
B
C
D
\bH42145
P Squib
(2nd step) Airbag
Sensor
Assy
Center
DLC3
CGTC DTC B1185/57
C
D
±
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
05±1363
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
1CHECK INSTRUMENT PANEL WIRE(P SQUIB, 2ND STEP CIRCUIT)
(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 connectors from the airbag sensor assy center and the instrument panel passenger airbag assy.
(d)Release the activation prevention mechanism built in the connector ºBº (See page 05±1184).
(e)Measure the resistance between P2+ and P2± of the con- nector ºCº.
OK:
Resistance: 1 M or Higher
NGREPAIR OR REPLACE INSTRUMENT PANEL WIRE
OK
2CHECK AIR BAG SENSOR ASSY CENTER
(a)Connect the connector to the airbag sensor assy center.
(b)Connect the negative (±) terminal cable to the battery, and wait for at least 2 seconds.
(c)Turn the ignition switch to the ON position, and wait for at
least 10 seconds.
(d)Clear the stored DTCs in the memory (See page 05±1184).
(e)Turn the ignition switch to the LOCK position.
(f)Turn the ignition switch to the ON position, and wait for at
least 10 seconds.
(g)Check the DTCs (See page 05±1184). OK:
DTC B1185/57 is not output.
HINT:
Codes other than code B1185/57 may be output at this time, but
they are not related to this check.
NG REPLACE AIR BAG SENSOR ASSY CENTER
OK
Page 1380 of 5135

H42146
P Squib
(2nd step)Airbag
Sensor
Assy
Center
DTC B1185/57
TC
CG
DLC3 C
D
05±1364
±
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
3CHECK INSTRUMENT PANEL PASSENGER AIR BAG ASSY(P SQUIB, 2ND STEP)
(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)Connect the connector to the instrument panel passen- ger airbag 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, and wait for at least 10 seconds.
(f)Clear the stored DTCs in the memory (See page 05±1184).
(g) Turn the ignition switch to the LOCK position.
(h) Turn the ignition switch to the ON position, and wait for at least 10 seconds.
(i)Check the DTCs (See page 05±1184). OK:
DTC B1185/57 is not output.
HINT:
Codes other than code B1185/57 may be output at this time, but
they are not related to this check.
NG REPLACE INSTRUMENT PANEL PASSENGER AIR BAG ASSY
OK
USE SIMULATION METHOD TO CHECK
Page 1381 of 5135

\b
H41475
D Squib
(2nd step)
Airbag
Sensor
Assy
Center
Spiral
Cable
Sub±assy
Color: Black
A
B
C
D
E
F
05±1358
±
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
DTC B1183/22 SHORT IN D SQUIB (2ND STEP) CIRCUIT (TO B+)
CIRCUIT DESCRIPTION
The D squib (2nd step) circuit consists of the airbag sensor assy center, the spiral cable sub±assy and the
horn button assy.
This circuit actuates the SRS to deploy when the SRS deployment conditio\
ns are fulfilled.
DTC B1183/22 is recorded when a short to B+ is detected in the D squib (2nd s\
tep) circuit.
DTC No.DTC Detecting ConditionTrouble Area
B1183/22
Short circuit in D squib (2nd step) wire harness (to B+)
D squib (2nd step) malfunction
Spiral cable sub±assy malfunction
Airbag sensor assy center malfunctionHorn button assy (D squib, 2nd step)
Spiral cable sub±assy
Airbag sensor assy center
Instrument panel wire
WIRING DIAGRAM
See page 05±1346.
CIRCUIT INSPECTION
1 CHECK D SQUIB CIRCUIT(2ND STEP)
(a) Turn the ignition switch to the LOCK position.
(b) Disconnect negative (±) terminal cable from the battery,
and wait for at least 90 seconds.
(c) Disconnect the connectors from the airbag sensor assy center and the horn button assy.
(d) Connect the negative (±) terminal cable to the battery, and turn the ignition switch to the ON position.
(e) Measure the voltage between the body ground and D2+ of the connector ºEº.
OK:
Voltage: Below 1 V
NG Go to step 5
OK
056MV±03
Page 1382 of 5135

\b
H42143
Airbag
Sensor
Assy
CenterSpiral
Cable
Sub±assy
Color: Black
DTC B1183/22
CG TC
DLC3
Service Wire
D2+D2±
D Squib
(2nd step)
C
D
E
F
±
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
05±1359
AVENSIS REPAIR MANUAL (RM1018E)
2CHECK AIR BAG SENSOR ASSY CENTER
(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)Connect the connector to the airbag sensor assy center.
(d)Using a service wire, connect D2+ and D2± of the connec- tor ºEº.
NOTICE:
Do not forcibly insert a service wire into the terminal of the
connector when connecting.
(e)Connect the negative (±) terminal cable to the battery, and wait for at least 2 seconds.
(f)Turn the ignition switch to the ON position, and wait for at least 10 seconds.
(g)Clear the stored DTCs in the memory (See page 05±1184).
(h) Turn the ignition switch to the LOCK position.
(i) Turn the ignition switch to the ON position, and wait for at
least 10 seconds.
(j)Check the DTCs (See page 05±1184). OK:
DTC B1183/22 is not output.
HINT:
Codes other than code B1183/22 may be output at this time, but
they are not related to this check.
NG REPLACE AIR BAG SENSOR ASSY CENTER
OK
Page 1383 of 5135

\bH42144
Airbag
Sensor
Assy
CenterSpiral
Cable
Sub±assy
DLC3
CG TC DTC B1183/22
D Squib
(2nd step)
C
D
E
F
05±1360
±
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
3CHECK HORN BUTTON ASSY(D SQUIB, 2ND STEP)
(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)Connect the connectors to the horn button 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, and wait for at
least 10 seconds.
(f)Clear the stored DTCs in the memory (See page 05±1184).
(g)Turn the ignition switch to the LOCK position.
(h)Turn the ignition switch to the ON position, and wait for at
least 10 seconds.
(i)Check the DTCs (See page 05±1184). OK:
DTC B1183/22 is not output.
HINT:
Codes other than code B1183/22 may be output at this time, but
they are not related to this check.
NG REPLACE HORN BUTTON ASSY
OK
4 USE SIMULATION METHOD TO CHECK
NG Go to step 1
OK
REPLACE ALL SRS COMPONENTS INCLUDING WIRE HARNESS
Page 1384 of 5135

H41478
Airbag
Sensor
Assy
CenterSpiral
Cable
Sub±assy
Instrument Panel Wire
D Squib
(2nd step)C D
E
FBA
H41479
Airbag
Sensor
Assy
CenterSpiral
Cable
Sub±assy
Color: Black
D Squib
(2nd step)
C D
E FBA
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
05±1361
AVENSIS REPAIR MANUAL (RM1018E)
5 CHECK INSTRUMENT PANEL WIRE
(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 instrument panel wire connector from the
spiral cable sub±assy.
(d) Connect the negative (±) terminal cable to the battery,
and turn the ignition switch to the ON position.
(e) Measure the voltage between the body ground and D2+
of the connector ºCº.
OK:
Voltage: Below 1 V
NG REPAIR OR REPLACE INSTRUMENT PANEL
WIRE
OK
6 CHECK SPIRAL CABLE SUB±ASSY
(a) Turn the ignition switch to the LOCK position.
(b) Turn the ignition switch to the ON position.
(c) Measure the voltage between the body ground and D2+
of the connector ºEº.
OK:
Voltage: Below 1 V
NG REPLACE SPIRAL CABLE SUB±ASSY
OK
7 USE SIMULATION METHOD TO CHECK
NG Go to step 1
OK
REPLACE ALL SRS COMPONENTS INCLUDING WIRE HARNESS