Page 1506 of 3115
H19231H21268H21130
D Squib
D+
u"
(-) (+)
Column Wire
Spiral
CableAirbag
Sensor
Assembly
H16856H21269H21131
D Squib
D+ u"
Column Wire
(+) (-)Dash Wire
Spiral
CableAirbag
Sensor
Assembly
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-725
918 Author: Date:
2004 LAND CRUISER (RM1071U)
5 Check spiral cable.
PREPARATION:
Disconnect the spiral cable connector from the column wire.
CHECK:
Measure the resistance between the body ground and D+ of the
orange spiral cable connector on the steering wheel pad (D
squib) side.
OK:
Resistance: 1 MW or Higher
NG Replace spiral cable.
OK
6 Check column wire.
PREPARATION:
Disconnect the column wire connector from the dash wire.
CHECK:
Measure the resistance between the body ground and D+ of the
column wire connector on the spiral cable side.
OK:
Resistance: 1 MW or Higher
NG Repair or replace column wire.
OK
Page 1508 of 3115
AB0119H19232
H21259
H21133
D Squib
Airbag
Sensor
Assembly
Spiral
Cable
D+
(-) (+)
ON
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-727
920 Author: Date:
2004 LAND CRUISER (RM1071U)
DTC B0103/12 Short in D Squib Circuit (to B+)
CIRCUIT DESCRIPTION
The D squib circuit consists of the airbag sensor assembly, the spiral cable and the steering wheel pad.
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
For details of the function of each components, see page OPERATION on page RS-3.
DTC B0103/12 is recorded when a B+ short is detected in the D squib circuit.
DTC No.DTC Detecting ConditionTrouble Area
B0103/12
Short circuit in D squib circuit (to B+)
D squib malfunction
Spiral cable malfunction
Airbag sensor assembly malfunctionSteering wheel pad (D squib)
Spiral cable
Airbag sensor assembly
Dash wire
Column wire
WIRING DIAGRAM
See page DI-71 1.
INSPECTION PROCEDURE
1 Prepare for inspection (See step 1 on page DI-923).
2 Check D squib circuit.
PREPARATION:
Connect the negative (-) terminal cable to the battery, and wait
at least for 2 seconds.
CHECK:
(a) Turn the ignition switch to ON.
(b) Measure the voltage between the body ground and D+ of
the orange connector on the steering wheel pad (D squib)
side between the airbag sensor assembly and the steer-
ing wheel pad (D squib).
OK:
Voltage: Below 1 V
NG Go to step 5.
OK
DI3J1-05
Page 1509 of 3115
AB0119W02043H19230H10600
H21272H21134
D Squib
D+
CG D-
TCON
DTC B0103/12
DLC3
" uAirbag
Sensor
Assembly
Spiral
Cable
DI-728
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
921 Author: Date:
2004 LAND CRUISER (RM1071U)
3 Check airbag sensor assembly.
PREPARATION:
(a) Turn the ignition switch to LOCK.
(b) Disconnect the negative (-) terminal cable from the bat-
tery, and wait at least for 90 seconds.
(c) Connect the connector to the airbag sensor assembly.
(d) Using a service wire, connect D+ and D- of the orange
connector on the steering wheel pad (D squib) side be-
tween the airbag sensor assembly and the steering wheel
pad (D squib).
(e) Connect the negative (-) terminal cable to the battery,
and wait at least for 2 seconds.
CHECK:
(a) Turn the ignition switch to ON, and wait at least for 10 se-
conds.
(b) Clear the DTC stored in memory (See page DI-692).
(c) Turn the ignition switch to LOCK, and wait at least for 10
seconds.
(d) Turn the ignition switch to ON, and wait at least for 10 se-
conds.
(e) Check the DTC (See page DI-692).
OK:
DTC B0103/12 is not output.
HINT:
Codes other than code B0103/12 may be output at this time, but
they are not relevant to this check.
NG Replace airbag sensor assembly.
OK
Page 1510 of 3115
AB0019W02043H10600
H21267
H21135
CG
TCON
DTC B0103/12 D Squib
DLC3 " u
Airbag
Sensor
Assembly
Spiral
Cable
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-729
922 Author: Date:
2004 LAND CRUISER (RM1071U)
4 Check D squib.
PREPARATION:
(a) Turn the ignition switch to LOCK.
(b) Disconnect the negative (-) terminal cable from the bat-
tery, and wait at least for 90 seconds.
(c) Connect the steering wheel pad (D squib) to the spiral
cable.
(d) Connect the negative (-) terminal cable to the battery,
and wait at least for 2 seconds.
CHECK:
(a) Turn the ignition switch to ON, and wait at least for 10 se-
conds.
(b) Clear the DTC stored in memory (See page DI-692).
(c) Turn the ignition switch to LOCK, and wait at least for 10
seconds.
(d) Turn the ignition switch to ON, and wait at least for 10 se-
conds.
(e) Check the DTC (See page DI-692).
OK:
DTC B0103/12 is not output.
HINT:
Codes other than code B0103/12 may be output at this time, but
they are not relevant to this check.
NG Replace steering wheel pad (D squib).
OK
From the results of the above inspection, the malfunctioning part can now be considered normal.
To make sure of this, use the simulation method to check. If the malfunctioning part can not be
detected by the simulation method, replace all SRS components including the wire harness.
Page 1511 of 3115
AB0119H19232
H21268
H21136
D Squib
D+ u"
(-) (+) ON
Column Wire
Airbag
Sensor
AssemblySpiral
Cable
AB0119H16857
H21269
H21137
D Squibu"
ON Column Wire
(+) (-)D+ Dash Wire
Airbag
Sensor
AssemblySpiral
Cable
DI-730
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
923 Author: Date:
2004 LAND CRUISER (RM1071U)
5 Check spiral cable.
PREPARATION:
(a) Turn the ignition switch to LOCK.
(b) Disconnect the spiral cable connector from the column
wire.
CHECK:
(a) Turn the ignition switch to ON.
(b) Measure the voltage between the body ground and D+ of
the orange spiral cable connector on the steering wheel
pad (D squib) side.
OK:
Voltage: Below 1 V
NG Replace spiral cable.
OK
6 Check column wire.
PREPARATION:
(a) Turn the ignition switch to LOCK.
(b) Disconnect the column wire connector from the dash
wire.
CHECK:
(a) Turn the ignition switch to ON.
(b) Measure the voltage between the body ground and D+ of
the column wire connector on the spiral cable side.
OK:
Voltage: Below 1 V
NG Repair or replace column wire.
OK
Page 1663 of 3115
H05146
Y-V
D2+ C2616Airbag Sensor Assembly
17
D2- Y-O 4
3
Spiral
Cable A28
D Squib (2nd step)
II4
II43 4
Y-V
Y-O
C26 DI-882
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1075 Author: Date:
2004 LAND CRUISER (RM1071U)
DTC B1180/17 Short in D Squib (2nd step) Circuit
CIRCUIT DESCRIPTION
The D squib (2nd step) circuit consists of the airbag sensor assembly, the spiral cable and the steering wheel
pad.
It causes the airbag to deploy when the airbag deployment conditions are satisfied.
For details of the function of each component, see OPERATION on page RS-3.
DTC B1180/17 is recorded when a short is detected in the D squib (2nd step) circuit.
DTC No.DTC Detecting ConditionTrouble Area
B1180/17
Short in D squib (2nd step) circuit
D squib (2nd step) malfunction
Spiral cable malfunction
Airbag sensor assembly malfunctionSteering wheel pad (D squib (2nd step))
Spiral cable
Airbag sensor assembly
Dash wire
Column wire
WIRING DIAGRAM
DIB40-01
Page 1664 of 3115
H19243H21259H21177
D Squib
(2nd step)
D2+
(-) (+) D2-
Airbag
Sensor
AssemblySpiral
Cable
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-883
1076 Author: Date:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
1 Prepare for inspection (See step 1 on page DI-923).
2 Check connector.
CHECK:
Make sure that the black spiral cable connector is not damaged.
OK:
The lock button is not disengaged, or the claw of the lock is not deformed or damaged.
NG Replace spiral cable.
OK
3 Check D squib (2nd step) circuit.
PREPARATION:
Release the airbag activation prevention mechanism built in the
connector on the airbag sensor assembly side between the air
bag sensor assembly and the steering wheel pad (D squib (2nd
step)) (See page DI-692).
CHECK:
Measure the resistance between D2+ and D2- of the black con-
nector on the steering wheel pad (D squib (2nd step)) side be-
tween the airbag sensor assembly and the steering wheel pad
(D squib (2nd step)).
OK:
Resistance: 1 MW or Higher
NG Go to step 6.
OK
Page 1666 of 3115
AB0119
H10600H21267
H21151
D Squib
(2nd step)
ON
DTC B1180/17
DLC3
" u
TC CGAirbag
Sensor
AssemblySpiral
Cable
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-885
1078 Author: Date:
2004 LAND CRUISER (RM1071U)
5 Check D squib (2nd step).
PREPARATION:
(a) Turn the ignition switch to LOCK.
(b) Disconnect the negative (-) terminal cable from the bat-
tery, and wait at least for 90 seconds.
(c) Connect the steering wheel pad (D squib (2nd step)) to
the spiral cable.
(d) Connect the negative (-) terminal cable to the battery,
and wait at least for 2 seconds.
CHECK:
(a) Turn the ignition switch to ON, and wait at least for 10 se-
conds.
(b) Clear the DTC stored in memory (See page DI-692).
(c) Turn the ignition switch to LOCK, and wait at least for 10
seconds.
(d) Turn the ignition switch to ON, and wait at least for 10 se-
conds.
(e) Check the DTC (See page DI-692).
OK:
DTC B1180/17 is not output.
HINT:
Codes other than code B1180/17 may be output at this time, but
they are not relevant to this check.
NG Replace steering wheel pad
(D squib (2nd step)).
OK
From the results of the above inspection, the malfunctioning part can now be considered normal.
To make sure of this, use the simulation method to check.
