CIRCUIT DESCRIPTION. The door side airbag sensor (RH) circuit consists of the airbag sensor assembly and door side airbag sensor. (RH). For details of the ...
Door Side Airbag Sensor (RH) Malfunction (2-Door only)
CIRCUIT DESCRIPTION The door side airbag sensor (RH) circuit consists of the airbag sensor assembly and door side airbag sensor (RH). For details of the function of each component, see OPERATION on page RS-2 . DTC B1142/B1143/34 is recorded when a malfunction is detected in the door side airbag sensor (RH) circuit. DTC No.
B1142/B1143/34
DTC Detecting Condition
Trouble Area Door side airbag sensor (RH) Airbag sensor assembly Instrument panel wire harness RH front door wire harness
Door side airbag sensor (RH) malfunction
WIRING DIAGRAM
D20 Door Side Airbag Sensor (RH)
DMR+
DMR-
2
Airbag Sensor Assembly
W-G (*1)
B-L 1
(*1)
2 IH1
1 IH1
W-G (*1)
B-L (*1)
3 C5 DMR+
4 C5 DMR-
*1 : 2 - Door w/ Side Airbag
H02750
2002 ECHO (RM884U)
Author:
Date:
528
DI-359 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 (RH) Airbag Sensor Assembly Airbag Sensor Assembly
ON
DMR(-) H03355 AB0119 H17655
V
CHECK: (a) Turn the ignition switch to ON. (b) For the connector (on the airbag sensor assembly side) between the door side airbag sensor (RH) and the airbag sensor assembly, measure the voltage between body ground and each of DMR+ and DMR-. OK: Voltage: Below 1 V
DMR+
(+) H17660
NG
Go to step 8.
OK
3
Check wire harness (to ground).
Door Side Airbag Sensor (RH) Airbag Sensor Assembly Airbag Sensor Assembly
DMR(-) H03355 H17653
CHECK: For the connector (on the airbag sensor assembly side) between the door side airbag sensor (RH) and the airbag sensor assembly, measure the resistance between body ground and each of DMR+ and DMR-. OK: Resistance: 1 MΩ or Higher
DMR+
(+)
NG
Go to step 9.
H17661
OK 2002 ECHO (RM884U)
Author:
Date:
529
DI-360 DIAGNOSTICS
4
-
SUPPLEMENTAL RESTRAINT SYSTEM
Check wire harness. CHECK: For the connector (on the airbag sensor assembly side) between the door side airbag sensor (RH) and the airbag sensor assembly, measure the resistance between DMR+ and DMR-. OK: Resistance: 1 MΩ or Higher
Door Side Airbag Sensor (RH) Airbag Sensor Assembly Airbag Sensor Assembly
PREPARATION: Using a service wire, connect DMR+ and DMR- of the connector (on the door side airbag sensor (RH) side) between the airbag sensor assembly and the door side airbag sensor (RH). CHECK: For the connector (on the airbag sensor assembly side) between the door side airbag sensor (RH) and the airbag sensor assembly, measure the resistance between DMR+ and DMR-. OK: Resistance: Below 1 Ω
(-)
H17663
NG
Go to step 11.
OK
2002 ECHO (RM884U)
Author:
Date:
530
DI-361 DIAGNOSTICS
6
SUPPLEMENTAL RESTRAINT SYSTEM
Check door side airbag sensor (RH).
Door Side Airbag Sensor (RH) Airbag Sensor Assembly
DMR+
H04504 H01062
-
(+)
CHECK: For the connector of the door side airbag sensor (RH), measure the resistance between DMR+ and DMR-. OK: Resistance: 300 - 1500 Ω
DMR-
(-) H08346
NG
Replace door side airbag sensor (RH).
OK
2002 ECHO (RM884U)
Author:
Date:
531
DI-362 DIAGNOSTICS
7
-
SUPPLEMENTAL RESTRAINT SYSTEM
Check airbag sensor assembly.
Door Side Airbag Sensor (RH) Airbag Sensor Assembly →←
→←
ON
DLC3
CG
DTC B1142/B1143/34
Tc
H04502 AB0119 H10600 H08007
H12035
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 door side airbag sensor (RH) connector and airbag sensor assembly connector. (d) 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 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 seconds. (e) Check the DTC (See page DI-239 ). OK: DTC 34 is not output. HINT: Codes other than code 34 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:
532
DI-363 DIAGNOSTICS
8
-
SUPPLEMENTAL RESTRAINT SYSTEM
Check RH front door wire harness (to B+).
Door Side Airbag Sensor (RH) ←→
ON
Airbag Sensor Assembly
RH Front Door Wire Harness DMR+
(-)
DMR-
(+)
PREPARATION: Disconnect the RH front door wire harness connector on the airbag sensor assembly side. CHECK: (a) Turn the ignition switch to ON. (b) For the connector (on the RH front door wire harness side) between the airbag sensor assembly and the RH front door wire harness, measure the voltage between body ground and each of DMR+ and DMR-. OK: Voltage: Below 1 V NG
H03354 AB0119 H03364
Repair or replace RH front door wire harness.
H08348
OK
Repair or replace harness or connector between airbag sensor assembly and RH front door wire harness.
9
Check RH front door wire harness (to ground).
Door Side Airbag Sensor (RH) Airbag Sensor Assembly
RH Front Door Wire Harness
(-)
DMR+
DMR-
PREPARATION: Disconnect the RH front door wire harness connector on the airbag sensor assembly side. CHECK: For the connector (on the RH front door wire harness side) between the airbag sensor assembly and the RH front door wire harness, measure the resistance between body ground and each of DMR+ and DMR-. OK: Resistance: 1 MΩ or Higher
(+)
NG H03354 H03362
Repair or replace RH front door wire harness.
H08349
OK
Repair or replace harness or connector between airbag sensor assembly and RH front door wire harness.
2002 ECHO (RM884U)
Author:
Date:
533
DI-364 DIAGNOSTICS
10
-
SUPPLEMENTAL RESTRAINT SYSTEM
Check RH front door wire harness.
Door Side Airbag Sensor (RH)
RH Front Door Wire Harness
←→
Airbag Sensor Assembly
DMR-
DMR+
(+) H03354 H09507
PREPARATION: Disconnect the RH front door wire harness connector on the airbag sensor assembly side. CHECK: For the connector (on the RH front door wire harness side) between the airbag sensor assembly and the RH front door wire harness, measure the resistance between DMR+ and DMR-. OK: Resistance: 1 MΩ or Higher
(-) H08351
NG
Repair or replace RH front door wire harness.
OK
Repair or replace harness or connector between airbag sensor assembly and RH front door wire harness.
2002 ECHO (RM884U)
Author:
Date:
534
DI-365 DIAGNOSTICS
11
-
SUPPLEMENTAL RESTRAINT SYSTEM
Check RH front door wire harness. RH Front Door Wire Harness
Door Side Airbag Sensor (RH)
Airbag Sensor Assembly
←→
DMR-
DMR+ DMR+
(+) H03352 H03360 H09507
DMR-
(-)
PREPARATION: (a) Disconnect the RH front door wire harness connector on the airbag sensor assembly side. (b) Using a service wire, connect DMR+ and DMR- of the connector (on the RH front door wire harness side) between the RH front door wire harness and the door side airbag sensor (RH). CHECK: For the connector (on the RH front door wire harness side) between the airbag sensor assembly and the RH front door wire harness, measure the resistance between DMR+ and DMR-. OK: Resistance: Below 1 Ω
H08350
NG
Repair or replace RH front door wire harness.
OK
Repair or replace harness or connector between airbag sensor assembly and RH front door wire harness.
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