airbag TOYOTA AVENSIS 1999 Supplement

IN0EA–01
BO4111
Negative Cable
– INTRODUCTIONFOR ALL OF VEHICLES
IN–9
FOR ALL OF VEHICLES
PRECAUTION
1. FOR VEHICLES EQUIPPED WITH SRS AIRBAG AND
SEAT BELT PRETENSIONER
(a) The AVENSIS/ CORONA is equipped with an SRS (Sup-
plemental Restraint System), such as the driver airbag,
front passenger airbag, side airbags, curtain shield airbag
and seat belt pretensioners.
Failure to carry out service operations in the correct se-
quence could cause the supplemental restraint system to
unexpectedly deploy during servicing, possibly leading to
a serious accident.
Further, if a mistake is made in servicing the supplemental
restraint system, it is possible the SRS may fail to operate
when required. Before servicing (including removal or
installation of parts, inspection or replacement), be sure
to read the following items carefully, then follow the cor-
rect procedure described in this manual.
(b) GENERAL NOTICE
(1) Malfunction symptoms of the supplemental re-
straint system are difficult to confirm, so the diag-
nostic trouble codes become the most important
source of information when troubleshooting. When
troubleshooting the supplemental restraint system,
always inspect the diagnostic trouble codes before
disconnecting the battery (See Pub. No. RM599E,
page DI–152).
(2) Work must be started after 90 seconds from the
time the ignition switch is turned to the ”LOCK” posi-
tion and the negative (–) terminal cable is discon-
nected from the battery.
(The supplemental restraint system is equipped
with a back–up power source so that if work is
started within 90 seconds of disconnecting the neg-
ative (–) terminal cable from the battery, the SRS
may deploy.)
When the negative (–) terminal cable is discon-
nected from the battery, memory of the clock and
audio systems will be cancelled. So before starting
work, make a record of the contents memorized by
the each memory system. Then when work is fin-
ished, reset the clock and audio systems as before.
To avoid erasing the memory of each memory sys-
tem, never use a back–up power supply from out-
side the vehicle.

R11910Match marks
IN–10
– INTRODUCTIONFOR ALL OF VEHICLES
(3) Even in cases of a minor collision where the SRS
does not deploy, the steering wheel pad (See Pub.
No. RM599E, page RS–15), front passenger airbag
assembly (See Pub. No. RM599E, page RS–28),
side airbag assemblies (See page RS–11), curtain
shield airbag assemblies (See page RS–25) and
seat belt pretensioners (See Pub. No. RM599E,
page BO–152) should be inspected.
(4) Never use SRS parts from another vehicle. When
replacing parts, replace them with new parts.
(5) Before repairs, remove the airbag sensor if shocks
are likely to be applied to the sensor during repairs.
(6) Never disassemble and repair the airbag sensor as-
sembly, side airbag sensor assembly, steering
wheel pad, front passenger airbag, side airbag or
seat belt pretensioner in order to reuse them.
(7) If the airbag sensor assembly, side airbag sensor
assembly, steering wheel pad, front passenger air-
bag, side airbag or seat belt pretensioner have
been dropped, or if there are cracks, dents or other
defects in the case, bracket or connector, replace
them with new ones.
(8) Do not directly expose the airbag sensor assembly,
side airbag sensor assembly, steering wheel pad,
front passenger airbag, side airbag or seat belt pre-
tensioner to hot air or flames.
(9) Use a volt/ohmmeter with high impedance (10 kΩ/V
minimum) for troubleshooting of the electrical cir-
cuit.
(10) Information labels are attached to the periphery of
the SRS components. Follow the instructions on the
notices.
(11) After work on the supplemental restraint system is
completed, check the SRS warning light (See Pub.
No. RM599E, page DI–152).
(c) SPIRAL CABLE (in Combination Switch)
The steering wheel must be fitted correctly to the steering
column with the spiral cable at the neutral position, other-
wise cable disconnection and other troubles may result.
Refer to Pub. No. RM599E, page SR–18 of this manual
concerning correct steering wheel installation.

B02401
Example:
Correct Wrong
Z13950
Example:
– INTRODUCTIONFOR ALL OF VEHICLES
IN–11
(d) STEERING WHEEL PAD (with Airbag)
(1) When removing the steering wheel pad or handling
a new steering wheel pad, it should be placed with
the pad top surface facing up.
Storing the pad with its metallic surface facing up-
ward may lead to a serious accident if the airbag in-
flates for some reason. In addition do not store a
steering wheel pad on top of another one.
(2) Never measure the resistance of the airbag squib.
(This may cause the airbag to deploy, which is very
dangerous.)
(3) Grease should not be applied to the steering wheel
pad and the pad should not be cleaned with deter-
gents of any kind.
(4) Store the steering wheel pad where the ambient
temperature remains below 93
C (200
F), without
high humidity and away from electrical noise.
(5) When using electric welding, first disconnect the air-
bag connector (yellow color and 2 pins) under the
steering column near the combination switch con-
nector before starting work.
(6) When disposing of a vehicle or the steering wheel
pad alone, the airbag should be deployed using an
SST before disposal (See Pub. No. RM599E, page
RS–17).
Carry out the operation in a safe place away from
electrical noise.

B02402
Example:
Correct
Wrong
B02404
Example: IN–12
– INTRODUCTIONFOR ALL OF VEHICLES
(e) FRONT PASSENGER AIRBAG ASSEMBLY
(1) Always store a removed or new front passenger air-
bag assembly with the airbag deployment direction
facing up.
Storing the airbag assembly with the airbag deploy-
ment direction facing down could cause a serious
accident if the airbag inflates.
(2) Never measure the resistance of the airbag squib.
(This may cause the airbag to deploy, which is very
dangerous.)
(3) Grease should not be applied to the front passen-
ger airbag assembly and the airbag door should not
be cleaned with detergents of any kind.
(4) Store the airbag assembly where the ambient tem-
perature remains below 93
C (200
F), without high
humidity and away from electrical noise.
(5) When using electric welding, first disconnect the air-
bag connector (yellow color and 2 pins) installed on
the assembly before starting work.
(6) When disposing of a vehicle or the airbag assembly
alone, the airbag should be deployed using an SST
before disposal (See Pub. No. RM599E, page
RS–30).
Perform the operation in a safe place away from
electrical noise.

B02129
Example:
Correct Wrong
B01546
Example:
– INTRODUCTIONFOR ALL OF VEHICLES
IN–13
(f) SIDE AIRBAG ASSEMBLY
(1) Always store a removed or new side airbag assem-
bly with the airbag deployment direction facing up.
Storing the airbag assembly with the airbag deploy-
ment direction facing down could cause a serious
accident if the airbag inflates.
(2) Never measure the resistance of the airbag squib.
(This may cause the airbag to deploy, which is very
dangerous.)
(3) Grease should not be applied to the side airbag as-
sembly and the surface should not be cleaned with
detergents of any kind.
(4) Store the airbag assembly where the ambient tem-
perature remains below 93
C (200
F), without high
humidity and away from electrical noise.
(5) When using electric welding, first disconnect the air-
bag connector (yellow color and 2 pins) under the
seat before starting work.
(6) When disposing of a vehicle or the side airbag as-
sembly alone, the airbag should be deployed using
an SST before disposal (See page RS–12).
Perform the operation in a safe place away from
electrical noise.



B08604
Example:
CorrectWrong Clear Plastic Bag

B08605
Example:
IN–14
– INTRODUCTIONFOR ALL OF VEHICLES
(g) CURTAIN SHIELD AIRBAG ASSEMBLY
(1) Always store a removed or new curtain shield air-
bag assembly in a clear plastic bag, and keep it in
a safe place.
NOTICE:
Protection bag is not reuse.
CAUTION:
Never disassemble the curtain shield airbag assembly
(2) Never measure the resistance of the airbag squib.
(This may cause the airbag to deploy, which is very
dangerous.)
(3) Grease should not be applied to the curtain shield
airbag assembly and the surface should not be
cleaned with detergents of any kind.
(4) Store the airbag assembly where the ambient tem-
perature remains below 93
C (200
F), without high
humidity and away from electrical noise.
(5) When using electric welding, first disconnect the air-
bag connector (yellow color and 2 pins) into the in-
trument panel before starting work.
(6) When disposing of a vehicle or the curtain shield air-
bag assembly alone, the airbag should be deployed
using an SST before disposal (See page RS–26).
Perform the operation in a safe place away from
electrical noise.

– INTRODUCTIONFOR ALL OF VEHICLES
IN–15
(h) SEAT BELT PRETENSIONER
(1) Never measure the resistance of the seat belt pre-
tensioner. (This may cause the pretensioner oper-
ates, which is very dangerous.)
(2) Oil or water should not be put on the front seat outer
belt and the front seat outer belt should not be
cleaned with detergents of any kind.
(3) Store the front seat outer belt where the ambient
temperature remains below 80
C (176
F), without
high humidity and away from electrical noise.
(4) When using electric welding, first disconnect the
connector (yellow color and 2 pins) installed at the
center pillar lower garnish before starting work.
(5) When disposing of a vehicle or a front seat outer
belt alone, the seat belt pretensioner should be acti-
vated before disposal (See Pub. No. RM599E,
page BO–153). Perform the operation in a safe
place away from electrical noise.
(i) AIRBAG SENSOR ASSEMBLY
(1) Never reuse the airbag sensor assembly involved
in a collision when the SRS has deployed.
(2) The connectors to the airbag sensor assembly
should be connected or disconnected with the sen-
sor mounted on the floor. If the connectors are con-
nected or disconnected while the airbag sensor as-
sembly is not mounted to the floor, it could cause
undesired ignition of the supplemental restraint sys-
tem.
(3) Work must be started after 90 seconds from the
time the ignition switch is turned to the ”LOCK” posi-
tion and the negative (–) terminal cable is discon-
nected from the battery, even if only loosing the set
bolts of the airbag sensor assembly.
(j) WIRE HARNESS AND CONNECTOR
The SRS wire harness is integrated with the instrument
panel wire harness and the cowl wire harness assembly
and floor wire harness assembly. The wires for the SRS
wire harness are encased in a yellow corrugated tube. All
the connectors for the system are also a standard yellow
color. If the SRS wire harness becomes disconnected or
the connector becomes broken due to an accident, etc.,
repair or replace it as shown on Pub. No. RM599E, page
RS–65.

Detection Item DTC No.
(See page)Trouble AreaSRS
DIAGNOSTIC TROUBLE CODE CHART
If a malfunction code is displayed during the DTC check, check the circuit listed for that code in the table
below. (Proceed to the page given for that circuit).
Warming Light
ON
ON
ON
ON
ON
ON
ON
DTC No.
Indicates the diagnostic trouble code.
Page or Instructions
Indicates the page where the inspection procedure
for each circuit is to be found, or gives instructions
for checking and repairs. 

Detection Item
Indicates the system of the problem or
contents of the problem. Trouble Area
Indicates the suspect area of the
problem. 
11
(DI–165)
12
(DI–170)
13
(DI–174)
14
(DI–178)
15
(DI–178)
16
airbag sensor assembly malfunction Front airbag sensor assembly (RH)
malfunction Short in D squib circuit (to ground)
Short in D squib circuit (to B)
Short in D squib circuit
Open in D squib circuit
Front airbag sensor assembly (LH)
malfunction Steering wheel pad (squib)
 Spiral cable
 Airbag sensor assembly
 Wire harness
 Front airbag sensor assembly (RH)
 Wire harness
 Front airbag sensor assembly (LH)
 Wire harness  Steering wheel pad (squib)
 Spiral cable
 Airbag sensor assembly
 Wire harness
 Steering wheel pad (squib)
 Spiral cable
 Airbag sensor assembly
 Wire harness
 Steering wheel pad (squib)
 Spiral cable
 Airbag sensor assembly
 Wire harness
Airbag sensor assembly
 Front passenger airbag sensor assembly (squib)
 Airbag sensor assembly Short in P squib circuit (to ground)ON
– INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMSIN–25
4. DIAGNOSTIC TROUBLE CODE CHART
The inspection procedure is shown in the table below. This table permits efficient and accurate troubleshoot-
ing using the diagnostic trouble codes displayed in the diagnostic trouble code check. Proceed with trouble-
shooting in accordance with the inspection procedure given in the diagnostic chart corresponding to the
diagnostic trouble codes displayed. The Supplemental Restraint System diagnostic trouble code chart is
shown below as an example.



B02407
WIRING DIAGRAM
DTC 13 Short in D Squib Circuit
CIRCUIT DESCRIPTION
The D squib circuit consists of the airbag sensor assembly, spiral cable and steering wheel pad.
It causes the airbag to deploy when the airbag deployment conditions are satisfied.
For details of the function of each components,see OPERATION on page RS–2.
DTC 13 is recorded when a short is detected in the D squib circuit.
DTC No.DTC Detecting Condition
Trouble Area
Short circuit between D wire harness and D wire harness of squib
D squib malfunction
Spiral cable malfunction
Airbag sensor assembly malfunctionSteering wheel pad (D squib)
Spiral cable
Airbag sensor assembly
Wire harness
 Diagnostic Trouble Code No. and Detection Item
Circuit Description
The major role and operation, etc. of the circuit
and its component parts are explained. 
Indicates the diagnostic trouble code, diagnostic
trouble code set parameter and suspect area of
the problem. 
Wiring Diagram
This shows a wiring diagram of the circuit.
Use this diagram together with ELECTRICAL
WIRING DIAGRAM to thoroughly understand the
circuit.
Wire colors are indicated by an alphabetical code.
B = Black, L = Blue, R = Red, BR = Brown,
LG = Light Green, V = Violet, G = Green,
O = Orange, W = White, GR = Gray, P = Pink,
Y = Yellow
The first letter indicates the basic wire color and
the second letter indicates the color of the stripe. 
Spiral
Cable
G–R
G–Y 1
27
6D+
D–
A15
A15
D SquibAirbag Sensor
Assembly
13
– INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMSIN–27
6. CIRCUIT INSPECTION
How to read and use each page is shown below.




 

B00972
ONTurn ignition switch ON. INSPECTION PROCEDURE
2 Check voltage at IG2 and ACC of airbag sensor assembly.
OK:
Voltage: Below 16V
Connector being checked is connected.  Indicates the condition of the connector of ECU during the check.PREPARATION:
CHECK:
Check battery and charging system.
(See charging system section)
OKNG
 Indicates the position of the ignition switch during the check.
Check from the connector back side.
(with harness)
Ignition Switch LOCK (OFF)
Ignition Switch START
LOCKIgnition Switch ON
Ignition Switch ACC
STARTON
ACC
Inspection Procedure
Use the inspection procedure to determine
if the circuit is normal or abnormal, and if it
is abnormal, use it to determine whether the
problem is located in the sensors, actuators,
wire harness or ECU.
 Indicates the place to check the voltage or resistance.
 Indicates the connector position to be checked, from the front or back side.
Connector being checked is disconnected. Check from the connector front side. (without harness)
In this case, care must be taken not to bend the terminals.
E6 Connector KNKWire Harness
E6 Connector KNK
Measure voltage between terminals IG2 and ACC of
airbag sensor assembly and body ground.
Airbag Sensor Assembly
(+)
(–)ACC IG2
 IN–28
– INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS