2001 TOYOTA AVALON Service Repair Manual

H01017AB0118AB0119R13006H01086H07487
P/T Squib (LH)
Airbag
Sensor
Assembly
ACC
or
DTC B0135/73ON
E1
Tc" u
DLC1
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-433
589 Author
: Date
:
2001 AVALON (RM808U)
3 Check airbag sensor assembly.
PREPARATION:
(a) Connect the connector to the airbag sensor assembly.
(b) 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 B0135/73 is not output.
HINT:
Codes other than code B0135/73 may be output at this time, but
they are not relevant to this check.
NG Replace airbag sensor assembly.
OK

H01018AB0118AB0119R13006H01086H01229
"u
E1
Tc ACC ON
orAirbag
Sensor
Assembly P/T Squib (LH)
DTC B0135/73 DLC1
DI-434
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
590 Author
: Date
:
2001 AVALON (RM808U)
4 Check P/T 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 seat belt pretensioner (LH) connector.
(d) Connect negative (-) terminal cable to the battery, and
wait at least for 2 seconds.
CHECK:
(a) Turn the ignition switch to LOOK, and wait at least for 20
second.
(b) Turn the ignition switch to ACC or ON, and wait at least
for 20 seconds.
(c) Clear the DTC stored in memory (See page DI-349).
(d) Turn the ignition switch to LOCK, and wait at least for 20
seconds.
(e) Turn the ignition switch to ACC or ON, and wait at least
for 20 seconds.
(f) Check the DTC (See page DI-349).
OK:
DTC B0135/73 is not output.
HINT:
Codes other than code B0135/73 may be output at this time, but
they are not relevant to this check.
NG Replace seat belt pretensioner (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.

H01016H02141H02213
P/T Squib (LH)Airbag
Sensor
Assembly
PL+
PL-
(+)(-)
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-435
591 Author
: Date
:
2001 AVALON (RM808U)
DTC B0136/74 Open in P/T Squib (LH) Circuit
CIRCUIT DESCRIPTION
The P/T squib circuit (LH) consists of the airbag sensor assembly and seat belt pretensioner (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 B0136/74 is recorded when an open is detected in the P/T squib (LH) circuit.
DTC No.DTC Detecting ConditionTrouble Area
B0136/74

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

P/T squib (LH) malfunction

Airbag sensor assembly malfunction
Seat belt pretensioner (LH)

Airbag sensor assembly

Wire harness
WIRING DIAGRAM
See page DI-431.
INSPECTION PROCEDURE
1 Prepare for inspection (See step 1 on page DI-475).
2 Check P/T squib (LH) circuit.
CHECK:
For the connector (on the seat belt pretensioner side) between
the seat belt pretensioner (LH) and the airbag sensor assembly,
measure the resistance between PL+ and PL-.
OK:
Resistance: Below 1 W
NG Repair or replace harness or connector be-
tween seat belt pretensioner (LH) and airbag
sensor assembly.
OK
DI4D5-03

H01017H02139AB0118AB0119R13006H01087H02214
P/T Squib (LH)
Airbag
Sensor
Assembly
PL+
PL-
ACC
or
DTC B0136/74ON
E1 TcDLC1
DI-436
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
592 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 PL+ and PL- of the connec-
tor (on the seat belt pretensioner side) between the seat
belt pretensioner (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 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 B0136/74 is not output.
HINT:
Codes other than code B0136/74 may be output at this time, but
they are not relevant to this check.
NG Replace airbag sensor assembly.
OK

AB0118
R13006AB0119H01018
H01087H01232
"u
E1Tc ACC ON
orAirbag
Sensor
Assembly P/T Squib (LH)
DTC B0136/74 DLC1
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-437
593 Author
: Date
:
2001 AVALON (RM808U)
4 Check P/T 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 seat belt pretensioner (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 B0136/74 is not output.
HINT:
Codes other than code B0136/74 may be output at this time, but
they are not relevant to this check.
NG Replace seat belt pretensioner (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.

H01016H08392H08396
P/T Squib (LH)
Airbag
Sensor
Assembly
PL+
(+)
(-)
DI-438
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
594 Author
: Date
:
2001 AVALON (RM808U)
DTC B0137/71 Short in P/T Squib (LH) Circuit (to
Ground)
CIRCUIT DESCRIPTION
The P/T squib (LH) circuit consists of the airbag sensor assembly and seat belt pretensioner (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 B0137/71 is recorded when a ground short is detected in the P/T squib (LH) circuit.
DTC No.DTC Detecting ConditionTrouble Area
B0137/71

Short circuit in P/T squib (LH) wire harness (to ground)

P/T squib (LH) malfunction

Airbag sensor assembly malfunction
Seat belt pretensioner (LH)

Airbag sensor assembly

Wire harness
WIRING DIAGRAM
See page DI-431.
INSPECTION PROCEDURE
1 Prepare for inspection (See step 1 on page DI-475).
2 Check P/T squib (LH) circuit.
CHECK:
For the connector (on the seat belt pretensioner side) between
the seat belt pretensioner (LH) and the airbag sensor assembly,
measure the resistance between PL+ and body ground.
OK:
Resistance: 1 MW or Higher
NG Repair or replace harness or connector be-
tween seat belt pretensioner (LH) and airbag
sensor assembly.
OK
DI4D6-02

H01017H02139AB0118AB0119R13006H01084H02216
P/T Squib (LH)Airbag
Sensor
Assembly
PL+
PL-ACC
or
DTC B0137/71ON " u
E1
Tc DLC1
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-439
595 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 PL+ and PL- of the connec-
tor (on the seat belt pretensioner side) between the seat
belt pretensioner (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 B0137/71 is not output.
HINT:
Codes other than code B0137/71 may be output at this time, but
they are not relevant to this check.
NG Replace airbag sensor assembly.
OK

H01018AB0118AB0119R13006H01084H01220
"u
E1 TcACC ON
orAirbag
Sensor
Assembly P/T Squib (LH)
DTC B0137/71 DLC1
DI-440
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
596 Author
: Date
:
2001 AVALON (RM808U)
4 Check P/T 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 seat belt pretensioner (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 B0137/71 is not output.
HINT:
Codes other than code B0137/71 may be output at this time, but
they are not relevant to this check.
NG Replace seat belt pretensioner (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.