Page 1199 of 1897
H03363AB0119H01370
H10968
Airbag
Sensor
Assembly
Front Airbag
Sensor (RH)
(+)SR+
(-)
SR- Airbag Sensor
Assembly
ON
H03361H01370H10969
Airbag
Sensor
Assembly
Front Airbag
Sensor (RH)
(+)SR+
(-)
SR- Airbag Sensor
Assembly
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-463
619 Author: Date:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Prepare for inspection (See step 1 on page DI-475).
2 Check wire harness (to B+).
CHECK:
(a) Turn the ignition switch to ON.
(b) For the connector (on the airbag sensor assembly side)
between the front airbag sensor (RH) and the airbag sen-
sor assembly, measure the voltage between body ground
and each of SR+ and SR-.
OK:
Voltage: Below 1 V
NG Repair or replace harness or connector be-
tween front airbag sensor (RH) and airbag sen-
sor assembly.
OK
3 Check wire harness (to ground).
CHECK:
For the connector (on the airbag sensor assembly side) be-
tween the front airbag sensor (RH) and the airbag sensor as-
sembly, measure the resistance between body ground and
each of SR+ and SR-.
OK:
Resistance: 1 MW or Higher
NG Repair or replace harness or connector be-
tween front airbag sensor (RH) and airbag sen-
sor assembly.
OK
Page 1202 of 1897
AB0118
R13006AB0119H01369
H01063H10976
Front Airbag
Sensor (RH)
Airbag
Sensor
Assembly
ON
or
DTC B1156/B1157/15 ACC
DLC1
E1 Tc
"u "u
DI-466
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
622 Author: Date:
2001 AVALON (RM808U)
7 Check airbag sensor assembly.
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 front airbag sensor (RH) connector and air-
bag 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 ACC or ON, and wait at least
for 20 seconds.
(b) Clear the DTC stored in memory (See page DI-349).
(c) Turn the ignition switch to LOCK, and wait at least for 20
seconds.
(d) Turn the ignition switch to ACC or ON, and wait at least
for 20 seconds.
(e) Check the DTC (See page DI-349).
OK:
DTC B1156/B1157/15 is not output.
HINT:
Codes other than code B1156/B1157/15 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.
Page 1204 of 1897
AB0119H08065
H03355
H10972
Airbag
Sensor
Assembly
Front Airbag
Sensor (LH)
(+)SL+
(-)
SL- Airbag Sensor
Assembly
ON
H08399 H03353H10973
Airbag
Sensor
Assembly
Front Airbag
Sensor (LH)
(+)SL+
(-)
SL- Airbag Sensor
Assembly
DI-468
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
624 Author: Date:
2001 AVALON (RM808U)
INSPECTION PROCEDURE
1 Prepare for inspection (See step 1 on page DI-475).
2 Check wire harness (to B+).
CHECK:
(a) Turn the ignition switch to ON.
(b) For the connector (on the airbag sensor assembly side)
between the front airbag sensor (LH) and the airbag sen-
sor assembly, measure the voltage between body ground
and each of SL+ and SL-.
OK:
Voltage: Below 1 V
NG Go to step 8.
OK
3 Check wire harness (to ground).
CHECK:
For the connector (on the airbag sensor assembly side) be-
tween the front airbag sensor (LH) and the airbag sensor as-
sembly, measure the resistance between body ground and
each of SL+ and SL-.
OK:
Resistance: 1 MW or Higher
NG Go to step 9.
OK
Page 1207 of 1897
AB0118
R13006AB0119H01064
H02757
H10977
Front Airbag
Sensor (LH)
Airbag
Sensor
Assembly
ON
or
DTC B1158/B1159/16 ACC
DLC1
E1
Tc
"u "u
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-471
627 Author: Date:
2001 AVALON (RM808U)
7 Check airbag sensor assembly.
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 front airbag sensor (LH) connector and air-
bag 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 ACC or ON, and wait at least
for 20 seconds.
(b) Clear the DTC stored in memory (See page DI-349).
(c) Turn the ignition switch to LOCK, and wait at least for 20
seconds.
(d) Turn the ignition switch to ACC or ON, and wait at least
for 20 seconds.
(e) Check the DTC (See page DI-349).
OK:
DTC B1158/B1159/16 is not output.
HINT:
Codes other than code B1158/B1159/16 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.
Page 1208 of 1897
H03354
H06141AB0119H08272
Airbag
Sensor
Assembly Front Airbag
Sensor (LH)
(+)
SL+
(-)
SL-
ON
Engine Room Main
Wire Harness
u"
H03354H06140H08258
Airbag
Sensor
Assembly Front Airbag
Sensor (LH)
(+)SL+
(-)SL- Engine Room Main
Wire Harness
DI-472
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
628 Author: Date:
2001 AVALON (RM808U)
8 Check engine room main wire harness (to B+).
PREPARATION:
Disconnect the engine room main wire harness connector on
the airbag sensor assembly side.
CHECK:
(a) Turn the ignition switch to ON.
(b) For the connector (on the LH front door wire harness side)
between the airbag sensor assembly and the engine
room main wire harness, measure the voltage between
body ground and each of SL+ and SL-.
OK:
Voltage: Below 1 V
NG Repair or replace engine room main wire har-
ness.
OK
Repair or replace harness or connector between airbag sensor assembly and engine room main
wire harness.
9 Check engine room main wire harness (to ground).
PREPARATION:
Disconnect the engine room main wire harness connector on
the airbag sensor assembly side.
CHECK:
For the connector (on the engine room main wire harness side)
between the airbag sensor assembly and the engine room main
wire harness, measure the resistance between body ground
and each of SL+ and SL-.
OK:
Resistance: 1 MW or Higher
NG Repair or replace engine room main wire har-
ness.
OK
Repair or replace harness or connector between airbag sensor assembly and engine room main
wire harness.
Page 1212 of 1897
H12003
Airbag Sensor
Assembly
I15
Ignition Switch
Engine Room R/B No. 5IG2 C6ACC 1F
5 6
B-O
B-LC6 W-G
ALTGR
1F
1C 1CDriver Side J/B
10 10
1 7
B-O3
6 2
7 W-L 7
BatteyFL MAINF6 IF1 W-L
IF1W-R 4
W-R
5
5 AM1
21
Engine Room J/BFL Block
72
112G
2G 2C
2HAM2
B
F7
F81
1
B1 SRS-ACC
BAM1ACC
AM2 IG2 DI-476
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
632 Author: Date:
2001 AVALON (RM808U)
WIRING DIAGRAM
Page 1214 of 1897
AB0119H01298H01299
Airbag Sensor Assembly
ON
ACC
IG2
(+) (-)
H01249
ON
DI-478
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
634 Author: Date:
2001 AVALON (RM808U)
2 Check source voltage.
PREPARATION:
Connect negative (-) terminal cable to the battery.
CHECK:
(a) Turn ignition switch ON.
(b) Measure the voltage between body ground and each of
IG2 and ACC on the sensor and operate electric system
(defogger, wiper, headlight, heater blower, etc.).
OK:
Voltage: 10 - 14 V
NG Check harness between battery and airbag sen-
sor assembly, and check battery and charging
system.
OK
3 Does SRS warning light turn off?
PREPARATION:
(a) Turn the ignition switch to LOCK.
(b) Connect the steering wheel pad connector.
(c) Connect the front passenger airbag assembly connector.
(d) Connect the side airbag assembly connectors.
(e) Connect the seat belt pretensioner connectors.
(f) Connect the airbag sensor assembly connectors.
(g) Connect the front airbag sensor connectors.
(h) Connect the side airbag sensor assembly connectors.
(i) Turn the ignition switch to ON.
CHECK:
Operate electric system (defogger, wiper, headlight, heater
blower, etc.) and check that SRS warning light goes off.
NO Check for DTCs. If a DTC is output, perform trou-
bleshooting for the DTC. If a normal code is out-
put, replace airbag sensor assembly.
YES
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.
Page 1215 of 1897
H12004
Battery10Airbag Sensor Assembly
LA
C63
B-Y 5 12
1F 1A1I
II2
B-Y 5 B-Y
5 AB DLC1
B-Y
56 M7
SRS Warning Light
LG-B
IJ1 4
LG-B
2G 2B
SRS WRN
Engine Room J/BB
FL Block F7
F6 1
1
B FL MAINDriver Side J/B
12
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-479
635 Author: Date:
2001 AVALON (RM808U)
SRS Warning Light Circuit Malfunction
CIRCUIT DESCRIPTION
The SRS warning light is located on the combination meter.
When the SRS is normal, the SRS warning light lights up for approx. 6 seconds after the ignition switch is
turned from the LOCK position to ACC or ON position, and then turns off automatically.
If there is a malfunction in the SRS, the SRS warning light lights up to inform the driver of the abnormality.
When terminals Tc and E1 of the DLC1 are connected, the DTC is displayed by blinking the SRS warning
light.
WIRING DIAGRAM
DI5RJ-04
