2001 TOYOTA AVALON Service Repair Manual

H01019H09668H12954
Squib (LH)Airbag
Sensor
Assembly
(-) (+)
FL-FL+
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-409
565 Author
: Date
:
2001 AVALON (RM808U)
DTC B0116/48 Open in Side Squib (LH) Circuit
CIRCUIT DESCRIPTION
The side squib (LH) circuit consists of the airbag sensor assembly and side airbag assembly (LH).
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
For details of the function of each component, see OPERATION on page RS-3.
DTC B0116/48 is recorded when an open is detected in the side squib (LH) circuit.
DTC No.DTC Detecting ConditionTrouble Area
B0116/48

Open circuit in FL+ wire harness or FL- wire harness of
squib

Side squib (LH) malfunction

Airbag sensor assembly malfunction
Side airbag assembly (LH)

Airbag sensor assembly

Wire harness
WIRING DIAGRAM
See page DI-405.
INSPECTION PROCEDURE
1 Prepare for inspection. (See step 1 on page DI-475)
2 Check side squib (LH) circuit.
CHECK:
For the connector (on the front side airbag assembly side) be-
tween the front side airbag assembly (LH) and the airbag sen-
sor assembly, measure the resistance between FL+ and FL-.
OK:
Resistance: Below 1 W
NG Repair or replace harness or connector be-
tween side airbag assembly (LH) and airbag
sensor assembly.
OK
DI6MX-01

AB0118
R13006AB0119H01017
H01074 H09671H12955
Squib (LH)
Airbag
Sensor
Assembly
FL+
E1 FL-
TcACC
or
DTC B0116/48
ON " u
DLC1
DI-410
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
566 Author
: Date
:
2001 AVALON (RM808U)
3 Check airbag sensor assembly.
PREPARATION:
(a) Connect the connector to the airbag sensor assembly.
(b) Using a service wire, connect FL+ and FL- of the connec-
tor (on the side airbag assembly side) between the side
airbag assembly (LH) and the airbag sensor assembly.
(c) Connect negative (-) terminal cable to the battery, and
wait at least 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 B0116/48 is not output.
HINT:
Codes other than code B0116/48 may be output at this time, but
they are not relevant to this check.
NG Replace side airbag sensor assembly.
OK

AB0118
R13006AB0119H01018
H01074
H01193
"u
E1 TcACC ON
orAirbag
Sensor
Assembly Squib (LH)
DTC B0116/48 DLC1
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-41 1
567 Author
: Date
:
2001 AVALON (RM808U)
4 Check side squib (LH).
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 side airbag assembly (LH) 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 B0116/48 is not output.
HINT:
Codes other than code B0116/48 may be output at this time, but
they are not relevant to this check.
NG Replace side airbag assembly (LH).
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.

H01016H09669H12956
Squib (LH)
Airbag
Sensor
Assembly
(-) (+)
FL+
DI-412
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
568 Author
: Date
:
2001 AVALON (RM808U)
DTC B0117/45 Short in Side Squib (LH) Circuit (to
Ground)
CIRCUIT DESCRIPTION
The side squib (LH) circuit consists of the airbag sensor assembly and side airbag assembly (LH).
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
For details of the function of each component, see OPERATION on page RS-3.
DTC B0117/45 is recorded when ground short is detected in the side squib (LH) circuit.
DTC No.DTC Detecting ConditionTrouble Area
B0117/45

Short circuit in side squib (LH) wire harness (to ground)

Side squib (LH) malfunction

Airbag sensor assembly malfunction
Side airbag assembly (LH)

Airbag sensor assembly

Wire harness
WIRING DIAGRAM
See page DI-405.
INSPECTION PROCEDURE
1 Prepare for inspection (See step 1 on page DI-475).
2 Check side squib (LH) circuit.
CHECK:
For the connector (on the side airbag assembly side) between
the side airbag assembly (LH) and the airbag sensor assembly,
measure the resistance between FL+ and body ground.
OK:
Resistance: 1 MW or Higher
NG Repair or replace harness or connector be-
tween side airbag assembly (LH) and airbag
sensor assembly.
OK
DI6MY-01

H01017
AB0118AB0119R13006H01071 H09671H12957
Squib (LH)
Airbag
Sensor
Assembly
FL+
E1 FL-
TcACC
or
DTC B0117/45
" u
ON
DLC1
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-413
569 Author
: Date
:
2001 AVALON (RM808U)
3 Check airbag sensor assembly.
PREPARATION:
(a) Connect the connector to the airbag sensor assembly.
(b) Using a service wire, connect FL+ and FL- of the connec-
tor (on the side airbag assembly side) between the side
airbag assembly (LH) and the airbag sensor assembly.
(c) 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 step 5 on 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 DTC (See page DI-349).
OK:
DTC B0117/45 is not output.
HINT:
Codes other than code B0117/45 may be output at this time, but
they are not relevant to this check.
NG Replace airbag sensor assembly.
OK

H01018AB0118AB0119R13006H01071H01185
"u
E1 TcACC ON
orAirbag
Sensor
Assembly Squib (LH)
DTC B0117/45 DLC1
DI-414
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
570 Author
: Date
:
2001 AVALON (RM808U)
4 Check side squib (LH).
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 side airbag assembly (LH) 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 step 5 on 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 B0117/45 is not output.
HINT:
Codes other than code B0117/45 may be output at this time, but
they are not relevant to this check.
NG Replace front side airbag assembly (LH).
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. If the malfunctioning part can not be
detected by the simulation method, replace all SRS components including the wire harness.

H01016AB0119
H09670H12958
Squib (LH)Airbag
Sensor
Assembly
FL+
(-)(+)
ON
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-415
571 Author
: Date
:
2001 AVALON (RM808U)
DTC B0118/46 Short in Side Squib (LH) Circuit (to B)
CIRCUIT DESCRIPTION
The side squib (LH) circuit consists of the airbag sensor assembly and side airbag assembly (LH).
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
For details of the function of each component, see OPERATION on page RS-3.
DTC B0118/46 is recorded when a B+ short is detected in the side squib (LH) circuit.
DTC No.DTC Detecting ConditionTrouble Area
B0118/46

Short circuit in side squib (LH) wire harness (to B+)

Side squib (LH) malfunction

Airbag sensor assembly malfunction
Side airbag assembly (LH)

Airbag sensor assembly

Wire harness
WIRING DIAGRAM
See page DI-405.
INSPECTION PROCEDURE
1 Prepare for inspection (See step 1 on page DI-475).
2 Check side squib (LH) circuit.
CHECK:
(a) Turn the ignition switch to ON.
(b) For the connector (on the side airbag assembly side) be-
tween the side airbag assembly (LH) and the airbag sen-
sor assembly, measure the voltage between FL+ and
body ground.
OK:
Voltage: 0 V
NG Repair or replace harness or connector be-
tween side airbag assembly (LH) and airbag
sensor assembly.
OK
DI6MZ-01

AB0118
R13006AB0119
H01017
H01072 H09671H12959
Squib (LH)
Airbag
Sensor
Assembly
FL+
E1 FL-
TcACC
or
DTC B0118/46
ON " u
DLC1
DI-416
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
572 Author
: Date
:
2001 AVALON (RM808U)
3 Check airbag sensor assembly.
PREPARATION:
(a) Connect the connector to the airbag sensor assembly.
(b) Using a service wire, connect FL+ and FL- of the connec-
tor (on the side airbag assembly side) between the side
airbag assembly (LH) and the airbag sensor assembly.
(c) 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 step 5 on 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 B0118/46 is not output.
HINT:
Codes other than code B0118/46 may be output at this time, but
they are not relevant to this check.
NG Replace airbag sensor assembly.
OK