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DI-393
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
DI18R-18
DTC B0101/14 Open in D Squib Circuit
CIRCUIT DESCRIPTION
The D squib circuit consists of the airbag sensor assembly, spiral cable and 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-2 .
DTC B0101/14 is recorded when an open is detected in the D squib circuit.
DTC No. DTC Detecting Condition Trouble Area
S Open circuit in D+ wire harness or D- wire harness of
S Steering wheel pad (D squib)
squib
S Spiral cable
B0101/14 S D squib malfunction
S Airbag sensor assembly
S Spiral cable malfunction
S Wire harness
S Airbag sensor assembly malfunction
WIRING DIAGRAM
See page DI-388 .
INSPECTION PROCEDURE
1 Prepare for inspection. (See step 1 on page DI-456 )
2 Check D squib circuit.
CHECK:
For the connector (on the spiral cable side) between the spiral
Airbag cable and the steering wheel pad, measure the resistance be-
Spiral
Cable Sensor tween D+ and D-.
Assembly OK:
D Squib
Resistance: Below 1
D- D+
(-) (+)
H01001
H02142 H02196 NG Go to step 5.
OK
2002 4RUNNER (RM887U)
Author : Date : 569
DI-394
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
3 Check airbag sensor assembly.
PREPARATION:
(a) Connect the connector to the airbag sensor assembly.
Airbag (b) Using a service wire, connect D+ and D- of the connector
Spiral
Sensor (on the spiral cable side) between the spiral cable and the
Cable
D Squib Assembly
steering wheel pad.
(c) Connect negative (-) terminal cable to the battery, and
ACC ON wait at least for 2 seconds.
CHECK:
D- D+ (a) Turn ignition switch to ACC or ON, and wait at least for 20
or seconds.
(b) Clear DTC stored in memory.
(See page DI-377 )
(c) Turn ignition switch to LOCK, and wait at least for 20 se-
DLC1 DTC B0101/14
conds.
(d) Turn ignition switch to ACC or ON, and wait at least for 20
seconds.
(e) Check DTC.
E1 Tc (See page DI-377 )
H01002 H02144
AB0118 AB0119 OK:
R13006 W02044 H02197
DTC B0101/14 is not output.
HINT:
Codes other than code B0101/14 may be output at this time, but
they are not relevant to this check.
NG Replace airbag sensor assembly.
OK
2002 4RUNNER (RM887U)
Author : Date : 570
DI-395
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
4 Check D squib.
PREPARATION:
(a) Turn ignition switch to LOCK.
(b) Disconnect negative (-) terminal cable from the battery,
D Squib Airbag
Spiral Sensor and wait at least for 90 seconds.
Cable Assembly (c) Connect the steering wheel pad connector.
(d) Connect negative (-) terminal cable to the battery, and
wait at least for 2 seconds.
ACC ON CHECK:
(a) Turn ignition switch to ACC or ON, and wait at least for 20
seconds.
or
(b) Clear DTC stored in memory.
DLC1 DTC B0101/14 (See page DI-377 )
(c) Turn ignition switch to LOCK, and wait at least for 20 se-
conds.
(d) Turn ignition switch to ACC or ON, and wait at least for 20
seconds.
E1 Tc
(e) Check DTC.
H01003 (See page DI-377 )
AB0118 AB0119
R13006 W02044 H01141 OK:
DTC B0101/14 is not output.
HINT:
Codes other than code B0101/14 may be output at this time, but
they are not relevant to this check.
NG Replace steering wheel pad.
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.
2002 4RUNNER (RM887U)
Author : Date : 571
DI-396
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
5 Check spiral cable.
PREPARATION:
Disconnect the connector between the airbag sensor assembly
Airbag and the spiral cable.
Spiral Sensor
Cable CHECK:
Assembly
D Squib For the connector (on the spiral cable side) between the spiral
cable and the steering wheel pad, measure the resistance be-
tween D+ and D-.
OK:
D- D+
Resistance: Below 1
(-) (+)
H01000
H02142 H02195
NG Repair or replace spiral cable.
OK
6 Check harness between airbag sensor assembly and spiral cable.
CHECK:
Airbag For the connector (on the spiral cable side) between the airbag
Spiral
Sensor sensor assembly and the spiral cable, measure the resistance
Cable
Assembly between D+ and D-.
D Squib
OK:
Resistance: Below 1
D- D+
(-) (+)
NG Repair or replace harness or connector be-
H01004 tween airbag sensor assembly and spiral cable.
R14286 H01143
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.
2002 4RUNNER (RM887U)
Author : Date : 572
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