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DI-254
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
DI18Q-37
CIRCUIT INSPECTION
DTC B0100/13 Short 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 B0100/13 is recorded when a short is detected in the D squib circuit.
DTC No. DTC Detecting Condition Trouble Area
S Short circuit between D+ wire harness and D- wire har-
S Steering wheel pad (D squib)
ness of squib
S Spiral cable
B0100/13 S D squib malfunction
S Airbag sensor assembly
S Spiral cable malfunction
S Wire harness
S Airbag sensor assembly malfunction
WIRING DIAGRAM
Airbag Sensor Assembly
A11
D Squib
14
1 Y-B (SB)
C4 D+
13
2 Y (SB)
C4 D-
Spiral
Cable
H01451
2002 ECHO (RM884U)
Author : Date : 424
DI-255
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
INSPECTION PROCEDURE
1 Prepare for inspection. (See step 1 on page DI-390 )
2 Check D squib circuit.
PREPARATION:
Release the airbag activation prevention mechanism of the
Spiral
Airbag connector (on the airbag sensor assembly side) between the
Sensor
Cable airbag sensor assembly and the spiral cable.
Assembly
D Squib (See page DI-239 )
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-.
D- D+ OK:
Resistance: 1 M or Higher
(-) (+)
H01001
H02142 H02193
NG Go to step 5.
OK
2002 ECHO (RM884U)
Author : Date : 425
DI-256
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
3 Check airbag sensor assembly.
PREPARATION:
(a) Connect the connector to the airbag sensor assembly.
(b) Connect negative (-) terminal cable to the battery, and
Airbag
Spiral wait at least for 2 seconds.
Sensor
Cable CHECK:
Assembly
D Squib (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 )
ON (c) Turn the ignition switch to LOCK, and wait at least for 20
seconds.
(d) Turn the ignition switch to ON, and wait at least for 20 se-
conds.
DLC3 DTC B0100/13 (e) Check DTC. (See page DI-239 )
OK:
DTC B0100/13 is not output.
HINT:
Codes other than code B0100/13 may be output at this time, but
CG Tc
H01002
they are not relevant to this check.
AB0119
H10600 FI1390 H10598
NG Replace airbag sensor assembly.
OK
2002 ECHO (RM884U)
Author : Date : 426
DI-257
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
4 Check D squib.
PREPARATION:
(a) Turn the ignition switch to LOCK.
(b) Disconnect negative (-) terminal cable from the battery,
Spiral Airbag and wait at least for 90 seconds.
Cable Sensor
Assembly (c) Connect the steering wheel pad connector.
D Squib (d) Connect negative (-) terminal cable to the battery, and
wait at least for 2 seconds.
CHECK:
ON
(a) Turn the ignition switch to LOCK, and wait at least for 20
seconds.
(b) Turn the ignition switch to ON, and wait at least for 20 se-
DTC B0100/13
conds.
DLC3
(c) Clear DTC stored in memory. (See page DI-239 )
(d) Turn the ignition switch to LOCK, and wait at least for 20
seconds.
(e) Turn the ignition switch to ON, and wait at least for 20 se-
CG Tc conds.
(f) Check DTC. (See page DI-239 )
H01003
AB0119
H10600 FI1390 H10599 OK:
DTC B0100/13 is not output.
HINT:
Codes other than code B0100/13 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 : 427
DI-258
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
5 Check spiral cable.
PREPARATION:
(a) Disconnect the connector between the airbag sensor as-
Spiral
Airbag sembly and the spiral cable.
Sensor (b) Release the airbag activation prevention mechanism of
Cable
Assembly
D Squib the spiral cable connector on the airbag sensor assembly
side. (See page DI-239 )
CHECK:
For the connector (on the spiral cable side) between the spiral
cable and the steering wheel pad, measure the resistance be-
D- D+ tween D+ and D-.
OK:
Resistance: 1 M or Higher
(-) (+)
H01000
H02142 H02195
NG Repair or replace spiral cable.
OK
6 Check harness between airbag sensor assembly and spiral cable.
PREPARATION:
Release the airbag activation prevention mechanism of the
connector (on the airbag sensor assembly side) between the
Airbag airbag sensor assembly and the spiral cable.
Spiral Sensor
Cable Assembly
(See page DI-239 )
CHECK:
D Squib
For the connector (on the spiral cable side) between the airbag
sensor assembly and the spiral cable, measure the resistance
between D+ and D-.
D+ OK:
D-
Resistance: 1 M or Higher
(-) (+)
H01004
H02142 H10601 NG Repair or replace harness or connector be-
tween airbag sensor assembly and spiral cable.
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 : 428
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