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DI-342
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
DI6ZW-03
DTC B1140/32 Side Airbag Sensor Assembly (RH)
Malfunction
CIRCUIT DESCRIPTION
The side airbag sensor assembly (RH) consists of the safing sensor, diagnosis circuit and lateral decelera-
tion sensor, etc.
It receives signals from the lateral deceleration sensor, judges whether or not the SRS must be activated,
and diagnosis system malfunction.
DTC B1140/32 is recorded when occurrence of a malfunction in the side airbag sensor assembly (RH) is
detected.
DTC No. DTC Detecting Condition Trouble Area
S Side airbag sensor assembly (RH)
B1140/32 S Side airbag sensor assembly (RH) malfunction S Wire harness
S Airbag sensor assembly
WIRING DIAGRAM
S6
Side Airbag Sensor Assembly (RH) Airbag Sensor Assembly
4 7
GR
ESR C5 ESR
(*1)
9
3 LG
FSR C5 FSR
(*1)
10
2 L-Y
SSR+ C5 SSR+
(*1)
12
1 P
VUPR C5 VUPR
(*1)
*1 : w/ SideAirbag
H01450
2002 ECHO (RM884U)
Author : Date : 512
DI-343
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
INSPECTION PROCEDURE
1 Is DTC B1140/32 output?
CHECK:
(a) Turn ignition switch to ON and wait at least for 20 se-
ON conds.
(b) Clear DTC stored in memory (See step 5 on page
DI-239 ).
(c) Turn ignition switch to LOCK, and wait at least for 20 se-
conds.
DLC3 DTC B1140/32 (d) Turn ignition switch to ON and wait at least for 20 se-
conds.
(e) Check DTC (See page DI-239 ).
HINT:
CG Tc
Codes other than code B1140/32 may be output at this time, but
they are not relevant to this check.
AB0119
H10600 H09528 H12860
YES The malfunctioning part can now be considered
normal. To make sure of this, use the simulation
method to check.
NO
2 Is connector of side airbag sensor assembly (RH) properly connected?
3 Prepare for inspection (See step 1 on DI-390 ).
2002 ECHO (RM884U)
Author : Date : 513
DI-344
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
4 Check wire harness.
PREPARATION:
(a) Disconnect the side airbag sensor assembly (RH) con-
Side Airbag Sensor nector.
Assembly (RH)
Airbag (b) Using a service wire, connect SSR and ESR of the con-
Sensor nector (on the side airbag sensor assembly side) between
Assembly the side airbag sensor assembly (RH) and airbag sensor
assembly.
CHECK:
For the connector (on the airbag sensor assembly side) be-
Airbag Sensor tween the side airbag sensor assembly (RH) and the airbag
SSR Assembly sensor assembly, measure the resistance between SSR and
ESR.
OK:
ESR Resistance: Below 1
(+)
SSR
(-) ESR
H01015
H01160
NG Repair or replace harness or connector be-
H01058 H01036
tween side airbag sensor assembly (RH) and
airbag sensor assembly.
OK
2002 ECHO (RM884U)
Author : Date : 514
DI-345
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
5 Check wire harness.
PREPARATION:
Side Airbag Sensor Using a service wire, connect VUPR and FSR of the connector
Assembly (RH) (on the side airbag sensor assembly side) between the side air-
Airbag
Sensor bag sensor assembly (RH) and airbag sensor assembly.
Assembly CHECK:
For the connector (on the airbag sensor assembly side) be-
tween the side airbag sensor assembly (RH) and the airbag
sensor assembly, measure the resistance between VUPR and
FSR.
Airbag Sensor
Assembly OK:
VUPR
Resistance: Below 1
FSR
VUPR FSR
(+)
(-)
H01015
H01059
H01161
NG Repair or replace harness or connector be-
H01037
tween side airbag sensor assembly (RH) and
airbag sensor assembly.
OK
2002 ECHO (RM884U)
Author : Date : 515
DI-346
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
6 Check wire harness (to ground).
CHECK:
Side Airbag Sensor
Assembly (RH) For the connector (on the airbag sensor assembly side) be-
Airbag tween the side airbag sensor assembly (RH) and the airbag
Sensor
sensor assembly, measure the resistance between body
Assembly
ground and each of SSR, VUPR and FSR.
OK:
Resistance: Below 1
Airbag Sensor Assembly
VUPR
FSR
(-) (+)
H01013 NG Repair or replace harness or connector be-
H01038 SSR H01162
tween side airbag sensor assembly (RH) and
airbag sensor assembly.
OK
7 Check wire harness (to B+).
ON CHECK:
Side Airbag Sensor (a) Turn ignition switch to ON.
Assembly (RH) Airbag (b) For the connector (on the airbag sensor assembly side)
Sensor between the side airbag sensor assembly (RH) and the
Assembly airbag sensor assembly, measure the voltage between
the body ground and each of SSR, VUPR, ESR and FSR.
OK:
Airbag Sensor Assembly Voltage: 0 V
SSR FSR
VUPR NG Repair or replace harness or connector be-
AB0119
(-) (+) ESR tween side airbag sensor assembly (RH) and
H01013
H01039 H08270 airbag sensor assembly.
OK
2002 ECHO (RM884U)
Author : Date : 516
DI-347
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
8 Is DTC B1140/32 output again?
PREPARATION:
(a) Connect the connector to the side airbag sensor assem-
Side Airbag Sensor
Assembly (RH) bly (RH).
Airbag
(b) Connect the connector to the airbag sensor assembly.
Sensor
Assembly (c) Connect negative (-) terminal cable to the battery, and
wait at least for 2 seconds.
CHECK:
(a) Turn ignition switch to ON and wait at least for 20 se-
ON conds.
(b) Clear DTC stored in memory (See step 5 on page
DI-239 ).
(c) Turn ignition switch to LOCK, and wait at least for 20 se-
DTC B1140/32 conds.
DLC3
(d) Turn ignition switch to ON and wait at least for 20 se-
conds.
(e) Check DTC (See page DI-239 ).
CG Tc OK:
DTC B1140/32 is not output.
H01012 AB0119
H10600 H01065 H12861 HINT:
Codes other than code B1140/32 may be output at this time, but
they are not relevant to this check.
NG Go to step 9.
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 : 517
DI-348
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
9 Check airbag sensor assembly.
PREPARATION:
(a) Turn ignition switch to LOCK.
Side Airbag Sensor (b) Disconnect negative (-) terminal cable from the battery,
Assembly (LH) Airbag
and wait at least for 90 seconds.
Sensor
Assembly (c) Disconnect the side airbag sensor (RH) from the connec-
tor and connect the side airbag sensor (LH) to the con-
nector.
(d) Connect negative (-) terminal cable to the battery, and
ON wait at least for 2 seconds.
CHECK:
(a) Turn ignition switch to ON and wait at least for 20 se-
conds.
DTC B1140/32
DLC3 (b) Clear DTC stored in memory (See step 5 on page
DI-239 ).
(c) Turn ignition switch to LOCK, and wait at least for 20 se-
conds.
CG Tc (d) Turn ignition switch to ON and wait at least for 20 se-
conds.
H01012 AB0119
H10600 H01065 H12862 (e) Check DTC (See page DI-239 ).
OK:
DTC B1140/32 is not output.
HINT:
Codes other than code B1140/32 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 : 518
DI-349
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
10 Check side airbag sensor assembly (RH).
PREPARATION:
(a) Turn ignition switch to LOCK.
(b) Disconnect negative (-) terminal cable from the battery,
Airbag and wait at least for 90 seconds.
Sensor (c) Connect the side airbag sensor (RH) to the connector that
Side Airbag Sensor Assembly
the side airbag sensor (LH) was connected to.
Assembly (RH)
(d) Connect negative (-) terminal cable to the battery, and
wait at least for 2 seconds.
ON
CHECK:
(a) Turn ignition switch to ON and wait at least for 20 se-
conds.
DTC B1141/33 (b) Clear DTC stored in memory (See page DI-239 ).
DLC3 (c) Turn ignition switch to LOCK, and wait at least for 20 se-
conds.
(d) Turn ignition switch to ON and wait at least for 20 se-
conds.
CG Tc (e) Check DTC (See page DI-239 ).
OK:
H01007 AB0119
H10600 H01066 H12863 DTC B1141/33 is not output.
HINT:
Codes other than code B1141/33 may be output at this time, but
they are not relevant to this check.
NG Replace side airbag sensor assembly (RH).
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 : 519
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