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.
B0100/13
DTC Detecting Condition
Trouble Area
Short circuit between D+ wire harness and D- wire harness of squib D squib malfunction Spiral cable malfunction Airbag sensor assembly malfunction
Prepare for inspection. (See step 1 on page DI-390 )
2
Check D squib circuit.
Airbag Sensor Assembly
Spiral Cable D Squib
D-
D+
(-) H01001 H02142
PREPARATION: Release the airbag activation prevention mechanism of the connector (on the airbag sensor assembly side) between the airbag sensor assembly and the spiral cable. (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 between D+ and D-. OK: Resistance: 1 MΩ or Higher
(+) H02193
NG
Go to step 5.
OK
2002 ECHO (RM884U)
Author:
Date:
425
DI-256 DIAGNOSTICS
3
-
SUPPLEMENTAL RESTRAINT SYSTEM
Check airbag sensor assembly.
Airbag Sensor Assembly
Spiral Cable D Squib →← ON
DTC B0100/13
DLC3
CG H01002 AB0119 H10600
Tc
FI1390
PREPARATION: (a) Connect the connector to the airbag sensor assembly. (b) Connect 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 20 seconds. (b) Clear DTC stored in memory. (See page DI-239 ) (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 seconds. (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 they are not relevant to this check.
H10598
NG
Replace airbag sensor assembly.
OK
2002 ECHO (RM884U)
Author:
Date:
426
DI-257 DIAGNOSTICS
4
-
SUPPLEMENTAL RESTRAINT SYSTEM
Check D squib.
→← Spiral Cable D Squib
Airbag Sensor Assembly
ON
DLC3
CG
DTC B0100/13
Tc
H01003 AB0119 H10600 FI1390
H10599
PREPARATION: (a) Turn the ignition switch to LOCK. (b) Disconnect negative (-) terminal cable from the battery, and wait at least for 90 seconds. (c) Connect the steering wheel pad connector. (d) Connect negative (-) terminal cable to the battery, and wait at least for 2 seconds. CHECK: (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 seconds. (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 seconds. (f) 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 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
5
-
SUPPLEMENTAL RESTRAINT SYSTEM
Check spiral cable.
Airbag Sensor Assembly
Spiral Cable ←→
D Squib
D-
D+
(-)
PREPARATION: (a) Disconnect the connector between the airbag sensor assembly and the spiral cable. (b) Release the airbag activation prevention mechanism of 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 between D+ and D-. OK: Resistance: 1 MΩ 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 sensor assembly and the spiral cable. (See page DI-239 ) CHECK: For the connector (on the spiral cable side) between the airbag sensor assembly and the spiral cable, measure the resistance between D+ and D-. OK: Resistance: 1 MΩ or Higher
Airbag Sensor Assembly
Spiral Cable D Squib
D(-) H01004 H02142
D+ (+) H10601
NG
Repair or replace harness or connector between 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)
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