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DI-366
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
DI6PV-04
DTC B1144/B1145/35 Door Side Airbag Sensor (LH) Malfunc-
tion (2-Door only)
CIRCUIT DESCRIPTION
The door side airbag sensor (LH) circuit consists of the airbag sensor assembly and door side airbag sensor
(LH).
For details of the function of each component, see OPERATION on page RS-2 .
DTC B1144/B1145/35 is recorded when malfunction is detected in the door side airbag sensor (LH) circuit.
DTC No. DTC Detecting Condition Trouble Area
S Door side airbag sensor (LH)
S Airbag sensor assembly
B1144/B1145/35 S Door side airbag sensor (LH) malfunction
S Instrument panel wire harness
S LH front door wire harness
WIRING DIAGRAM
D19
Door Side Airbag Sensor (LH) Airbag Sensor Assembly
2 4
W-G W-G
DML+ IG1 C3 DML+
2 (*1) (*1)
1 3
B-L B-L
DML- IG1 C3 DML-
1 (*1) (*1)
*1 : 2 - Door w/ Side Airbag H02750
2002 ECHO (RM884U)
Author : Date : 536
DI-367
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
INSPECTION PROCEDURE
1 Prepare for inspection (See step 1 on page DI-390 ).
2 Check wire harness (to B+).
Door Side Airbag Sensor CHECK:
(LH) (a) Turn the ignition switch to ON.
Airbag (b) For the connector (on the airbag sensor assembly side)
Sensor between the door side airbag sensor (LH) and the airbag
Assembly sensor assembly, measure the voltage between body
ground and each of DML+ and DML-.
Airbag Sensor
Assembly OK:
ON
Voltage: Below 1 V
DML+ DML-
(-) (+)
H03355
AB0119
H17658 H17664
NG Go to step 8.
OK
3 Check wire harness (to ground).
CHECK:
Door Side Airbag
Sensor (LH) For the connector (on the airbag sensor assembly side) be-
tween the door side airbag sensor (LH) and the airbag sensor
Airbag
Sensor
assembly, measure the resistance between body ground and
Assembly each of DML+ and DML-.
OK:
Airbag Sensor Assembly
Resistance: 1 M or Higher
DML+ DML-
(+) (-)
NG Go to step 9.
H03355
H17656 H17665
OK
2002 ECHO (RM884U)
Author : Date : 537
DI-368
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
4 Check wire harness.
Door Side Airbag CHECK:
Sensor (LH) For the connector (on the airbag sensor assembly side) be-
Airbag tween the door side airbag sensor (LH) and the airbag sensor
Sensor assembly, measure the resistance between DML+ and DML-.
Assembly
OK:
Airbag Sensor Resistance: 1 M or Higher
Assembly
DML+ DML-
(-)
H03355 (+) NG Go to step 10.
H17657 H17666
OK
5 Check wire harness.
Door Side Airbag PREPARATION:
Sensor (LH)
Using a service wire, connect DML+ and DML- of the connector
Airbag (on the door side airbag sensor (LH) side) between the airbag
Sensor
sensor assembly and the door side airbag sensor (LH).
Assembly
CHECK:
For the connector (on the airbag sensor assembly side) be-
Airbag Sensor
Assembly tween the door side airbag sensor (LH) and the airbag sensor
DML- DML+
assembly, measure the resistance between DML+ and DML-.
OK:
Resistance: Below 1
DML+ DML-
(-)
(+)
H03353
H03360 H17657 H17667 NG Go to step 11.
OK
2002 ECHO (RM884U)
Author : Date : 538
DI-369
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
6 Check door side airbag sensor (LH).
Door Side Airbag CHECK:
Sensor (LH) For the connector of the door side airbag sensor (LH), measure
Airbag
the resistance between DML+ and DML-.
Sensor OK:
Assembly Resistance: 300 - 1500
DML+ DML-
(+) (-)
H04504
H01062 H08346
NG Replace door side airbag sensor (LH).
OK
2002 ECHO (RM884U)
Author : Date : 539
DI-370
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
7 Check airbag sensor assembly.
PREPARATION:
Door Side Airbag
Sensor (LH) (a) Turn the ignition switch to LOCK.
(b) Disconnect negative (-) terminal cable from the battery,
Airbag
and wait at least for 90 seconds.
Sensor
Assembly (c) Connect the door side airbag sensor (LH) connector and
airbag sensor assembly connector.
(d) Connect negative (-) terminal cable to the battery, and
ON wait at least for 2 seconds.
CHECK:
(a) Turn the ignition switch to ON, and wait at least for 20 se-
conds.
DLC3 DTC B1144/B1145/35 (b) Clear the 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 se-
conds.
CG Tc (e) Check the DTC (See page DI-239 ).
H04502
OK:
AB0119
H10600 H08036 H12036 DTC 35 is not output.
HINT:
Codes other than code 35 may be output at this time, but they
are not relevant to this check.
NG Replace airbag sensor assembly.
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 : 540
DI-371
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
8 Check LH front door wire harness (to B+).
Door Side Airbag PREPARATION:
Sensor (LH) Disconnect the LH front door wire harness connector on the air-
Airbag bag sensor assembly side.
Sensor CHECK:
Assembly (a) Turn the ignition switch to ON.
(b) For the connector (on the LH front door wire harness side)
ON LH Front Door between the airbag sensor assembly and the LH front
Wire Harness
door wire harness, measure the voltage between body
DML+ DML- ground and each of DML+ and DML-.
OK:
(-) (+) Voltage: Below 1 V
H03354 NG Repair or replace LH front door wire harness.
AB0119
H03364 H08348
OK
Repair or replace harness or connector between airbag sensor assembly and LH front door wire
harness.
9 Check LH front door wire harness (to ground).
Door Side Airbag PREPARATION:
Sensor (LH) Disconnect the LH front door wire harness connector on the air-
Airbag bag sensor assembly side.
Sensor CHECK:
Assembly For the connector (on the LH front door wire harness side) be-
tween the airbag sensor assembly and the LH front door wire
harness, measure the resistance between body ground and
LH Front Door
each of DML+ and DML-.
Wire Harness DML+ DML- OK:
Resistance: 1 M or Higher
(-) (+)
H03354 NG Repair or replace LH front door wire harness.
H03362 H08349
OK
Repair or replace harness or connector between airbag sensor assembly and LH front door wire
harness.
2002 ECHO (RM884U)
Author : Date : 541
DI-372
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
10 Check LH front door wire harness.
Door Side Airbag LH Front Door Wire PREPARATION:
Harness
Sensor (LH) Disconnect the LH front door wire harness connector on the air-
Airbag bag sensor assembly side.
Sensor CHECK:
Assembly For the connector (on the LH front door wire harness side) be-
tween the airbag sensor assembly and the LH front door wire
harness, measure the resistance between DML+ and DML-.
DML+ DML- OK:
Resistance: 1 M or Higher
(+) (-)
H03354
H09507 H08351
NG Repair or replace LH front door wire harness.
OK
Repair or replace harness or connector between airbag sensor assembly and LH front door wire
harness.
2002 ECHO (RM884U)
Author : Date : 542
DI-373
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
11 Check LH front door wire harness.
LH Front Door Wire PREPARATION:
Door Side Airbag
Harness (a) Disconnect the LH front door wire harness connector on
Sensor (LH)
the airbag sensor assembly side.
Airbag
Sensor (b) Using a service wire, connect DML+ and DML- of the con-
Assembly nector (on the LH front door wire harness side) between
the LH front door wire harness and the door side airbag
sensor (LH).
CHECK:
DML- DML+ DML+ DML-
For the connector (on the LH front door wire harness side) be-
tween the airbag sensor assembly and the LH front door wire
harness, measure the resistance between DML+ and DML-.
OK:
(+) (-)
Resistance: Below 1
H03352
H03360 H09507 H08350
NG Repair or replace LH front door wire harness.
OK
Repair or replace harness or connector between airbag sensor assembly and LH front door wire
harness.
2002 ECHO (RM884U)
Author : Date : 543
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