2001 TOYOTA AVALON Service Repair Manual

H01009H01371H01155
Airbag
Sensor
Assembly Front Airbag Sensor (RH)
(+) SR+
(-)SR-
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-465
621 Author
: Date
:
2001 AVALON (RM808U)
6 Check front airbag sensor (RH).
CHECK:.
For the connector (on the front airbag sensor (RH)), measure
the resistance between SR+ and SR-.
OK:
Resistance: 300 - 1500 W
NG Replace front airbag sensor (RH).
OK

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.

H02750
Airbag Sensor Assembly Front Airbag Sensor (LH)
+SL
-SL C615
26 2
1 +SL
IF2
-SL21
C6 BR BRW-R W-R
IF2
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-467
623 Author
: Date
:
2001 AVALON (RM808U)
DTC B1158/B1159/16 Front Airbag Sensor (LH) Malfunction
CIRCUIT DESCRIPTION
The front airbag sensor (LH) circuit consists of the airbag sensor assembly and front airbag sensor (LH).
For details of the function of each component, see OPERATION on page RS-3.
DTC B1158/B1159/16 is recorded when malfunction is detected in the front airbag sensor (LH) circuit.
DTC No.DTC Detecting ConditionTrouble Area
B1158/B1159/16
Front airbag sensor (LH) malfunction

Front airbag sensor (LH)

Wire harness

Airbag sensor assembly

Engine room main wire harness
WIRING DIAGRAM
DI6N3-01

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

H08058H03355H10974
Airbag
Sensor
Assembly Front Airbag
Sensor (LH)
(+)SL+
(-)
SL- Airbag Sensor
Assembly
H09521H08058H03355H10975
Front Airbag
Sensor (LH)
Airbag
Sensor
Assembly
(+)SL+ Airbag Sensor
Assembly
(-)
SL- SL+SL-
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-469
625 Author
: Date
:
2001 AVALON (RM808U)
4 Check wire harness.
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 SL+ and SL-.
OK:
Resistance: 1 MW or Higher
NG Go to step 10.
OK
5 Check wire harness.
PREPARATION:
Using a service wire, connect SL+ and SL- of the connector (on
the front airbag sensor (LH) side) between the airbag sensor
assembly and the front airbag sensor (LH).
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 SL+ and SL-.
OK:
Resistance: Below 1 W
NG Go to step 11.
OK

H04504H01062H08346
Airbag
Sensor
Assembly
Front Airbag
Sensor (LH)
(+) SL+
(-)SL-
DI-470
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
626 Author
: Date
:
2001 AVALON (RM808U)
6 Check front airbag sensor (LH).
CHECK:
For the connector (on the front airbag sensor (LH)), measure
the resistance between SL+ and SL-.
OK:
Resistance: 300 - 1500 W
NG Replace front airbag sensor (LH).
OK

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.

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.