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DI-259
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
DI18R-33
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-254 .
INSPECTION PROCEDURE
1 Prepare for inspection. (See step 1 on page DI-390 )
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
Sensor tween D+ and D-.
Cable
Assembly OK:
D Squib
Resistance: Below 1
D- D+
(-) (+)
H01001
H02142 H02196 NG Go to step 5.
OK
2002 ECHO (RM884U)
Author : Date : 429
DI-260
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
3 Check airbag sensor assembly.
PREPARATION:
(a) Connect the connector to the airbag sensor assembly.
Spiral
Airbag (b) Using a service wire, connect D+ and D- of the connector
Sensor (on the spiral cable side) between the spiral cable and the
Cable
Assembly
D Squib steering wheel pad.
(c) Connect negative (-) terminal cable to the battery, and
wait at least for 2 seconds.
CHECK:
ON
(a) Turn the ignition switch to ON, and wait at least for 20 se-
D- D+
conds.
(b) Clear DTC stored in memory. (See page DI-239 )
(c) Turn the ignition switch to LOCK, and wait at least for 20
seconds.
DLC3 DTC B0101/14
(d) Turn the ignition switch to ON, and wait at least for 20 se-
conds.
(e) Check DTC. (See page DI-239 )
OK:
CG Tc
H01002
DTC B0101/14 is not output.
H02144 AB0119 HINT:
H10600 W02044 H10602
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 ECHO (RM884U)
Author : Date : 430
DI-261
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
4 Check D squib.
PREPARATION:
(a) Turn the 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.
CHECK:
ON (a) Turn the ignition switch to ON, and wait at least for 20 se-
conds.
(b) Clear DTC stored in memory. (See page DI-239 )
(c) Turn the ignition switch to LOCK, and wait at least for 20
DLC3 DTC B0101/14 seconds.
(d) Turn the ignition switch to ON, and wait at least for 20 se-
conds.
(e) Check DTC. (See page DI-239 )
OK:
CG Tc
H01003 DTC B0101/14 is not output.
AB0119
H10600 W02044 H10603 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 ECHO (RM884U)
Author : Date : 431
DI-262
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
5 Check spiral cable.
PREPARATION:
Disconnect the connector between the airbag sensor assembly
D Squib
Spiral Airbag and the spiral cable.
Sensor
Cable Assembly
CHECK:
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:
Resistance: Below 1
D- D+
(-) (+)
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.
H02142 H10604
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 ECHO (RM884U)
Author : Date : 432
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