2006 TOYOTA RAV4 Service Repair Manual

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fuel tank removal phone emergency towing ESP inoperative oil change headlight aiming

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Page 1689 of 2000

TOYOTA RAV4 2006 Service Repair Manual RS–40SUPPLEMENTAL RESTRAINT SYSTEM – AIRBAG SYSTEM
RS
3. SYMPTOM SIMULATION
HINT:
The most difficult case in troubleshooting is when no
problem symptoms occur. In such a case, a through
proble

RS–40SUPPLEMENTAL RESTRAINT SYSTEM – AIRBAG SYSTEM
RS
3. SYMPTOM SIMULATION
HINT:
The most difficult case in troubleshooting is when no
problem symptoms occur. In such a case, a through
problem analysis must be carried out. A simulation of the
same or similar conditions and environment in which the
problem occurred in the customer's vehicle should be
carried out. No matter how much skill or experience a
technician has, troubleshooting without confirming the
problem symptoms will lead to important repairs being
overlooked and mistakes or delays.
This leads to a standstill in troubleshooting.
(a) Simulation method: When vibration seems to be the
major cause
HINT:
Perform this method only during the primary check
period (for approximately 6 seconds after the
ignition switch is turned ON).
(1) Use your finger to slightly vibrate the part of the
sensor considered to be the problem cause, and
check whether the malfunction recurs.
HINT:
Wiggling the relays too strongly may result in
open relays.
(2) Gently wiggle the connector.
(3) Slightly shake the wire harness vertically and
horizontally.
The connector joint and fulcrum of the vibration
are the major areas to be checked thoroughly.
4. FUNCTION OF SRS WARNING LIGHT
(a) Primary check
(1) Turn the ignition switch off. Wait for at least 2
seconds, then turn the ignition switch ON. The
SRS warning light comes on for approximately 6
seconds and the SRS airbag system diagnosis
(including the seat belt pretensioner) is
performed.
HINT:
If any malfunctions are detected during the
primary check, the SRS warning light remains
on even after the primary check period has
elapsed.
(b) Constant check
(1) After the primary check, the center airbag sensor
constantly monitors the SRS airbag system for
trouble.
HINT:
If any malfunctions are detected during the
constant check, the center airbag sensor
functions as follows:
• The SRS warning light comes on.
H100146E01

Page 1690 of 2000

TOYOTA RAV4 2006 Service Repair Manual SUPPLEMENTAL RESTRAINT SYSTEM – AIRBAG SYSTEMRS–41
RS
• The SRS warning light goes off, and then
comes on again. This blinking pattern
indicates a source voltage drop. The SRS
warning light

SUPPLEMENTAL RESTRAINT SYSTEM – AIRBAG SYSTEMRS–41
RS
• The SRS warning light goes off, and then
comes on again. This blinking pattern
indicates a source voltage drop. The SRS
warning light goes off 10 seconds after the
source voltage returns to normal.
(c) Review
(1) When the airbag system is normal:
The SRS warning light comes on only during the
primary check period (for approximately 6
seconds after the ignition switch is turned ON).
(2) When the airbag system malfunctions:
• The SRS warning light blinks after the
primary check period has elapsed.
• The SRS warning light goes off after the
primary check, but comes on again during the
constant check.
• The SRS warning light remains off even after
the ignition switch is turned from LOCK to
ON. However, if malfunctions such as an
open circuit have occurred in the wire
harness between the meter and ECU, the
warning light comes on 10 seconds after the
ignition switch is turned ON.
HINT:
The center airbag sensor keeps the SRS
warning light on if any malfunctions have been
detected in the airbag system.
5. FUNCTION OF PASSENGER AIRBAG ON/OFF
INDICATOR
(a) Initial check
(1) Turn the ignition switch ON.
(2) The passenger airbag ON / OFF indicator comes
on for approximately 4 seconds, then goes off
for approximately 2 seconds.
(3) Approximately 6 seconds after the ignition
switch is turned ON, the passenger airbag ON /
OFF indicator operates in accordance with the
conditions listed below.
HINT:
The passenger airbag ON / OFF indicator
operates as shown in the timing chart below in
order to check the indicator light circuit.
C128669
Condition ON Indicator OFF Indicator
Va c a n t O F F O F F
Adult is seated ON OFF
Child is seated OFF ON
Child restraint system is set OFF ON
Front passenger occupant classification
system failureOFF ON

Page 1691 of 2000

TOYOTA RAV4 2006 Service Repair Manual RS–42SUPPLEMENTAL RESTRAINT SYSTEM – AIRBAG SYSTEM
RS
6. SRS WARNING LIGHT CHECK
(a) Turn the ignition switch ON, and check that the SRS
warning light comes on for approximately 6 seconds
(pri

RS–42SUPPLEMENTAL RESTRAINT SYSTEM – AIRBAG SYSTEM
RS
6. SRS WARNING LIGHT CHECK
(a) Turn the ignition switch ON, and check that the SRS
warning light comes on for approximately 6 seconds
(primary check).
(b) Check that the SRS warning light goes off
approximately 6 seconds after the ignition switch is
turned ON (constant check).
HINT:
When any of the following symptoms occur, refer to
the Problem Symptoms Table (see page RS-34).
• The SRS warning light comes on occasionally
after the primary check period has elapsed.
• Even when the SRS warning light comes on, no
DTCs are set.
• Even when the ignition switch is turned from OFF
to ON, the SRS warning light remains off.
7. ACTIVATION PREVENTION MECHANISM
(a) FUNCTION OF ACTIVATION PREVENTION
MECHANISM
(1) An activation prevention mechanism is built into
the connector (on the center airbag sensor a
side) of the airbag system squib circuit to
prevent accidental airbag activation.
(2) This mechanism closes the circuit when the
connector is disconnected by bringing the short
spring into contact with the terminals and
shutting off external electricity to prevent
accidental airbag activation.
H043700E20
C093955E01

Page 1692 of 2000

TOYOTA RAV4 2006 Service Repair Manual SUPPLEMENTAL RESTRAINT SYSTEM – AIRBAG SYSTEMRS–43
RS
(b) RELEASE METHOD OF ACTIVATION
PREVENTION MECHANISM
(1) To release the activation prevention mechanism,
insert a piece of paper, with th

SUPPLEMENTAL RESTRAINT SYSTEM – AIRBAG SYSTEMRS–43
RS
(b) RELEASE METHOD OF ACTIVATION
PREVENTION MECHANISM
(1) To release the activation prevention mechanism,
insert a piece of paper, with the same thickness
as the male terminal (approximately 0.5 mm
[0.020 in.]), between the terminals and the short
spring to break the connection.
(2) Refer to the illustrations below concerning
connectors to utilize the activation prevention
mechanism and its release method.
CAUTION:
Never release the activation prevention
mechanism on the squib connector even
when inspecting with the squib
disconnected.
NOTICE:
• Do not release the activation prevention
mechanism unless specifically directed to
do so by the troubleshooting procedure.
• To prevent the terminal and the short
spring from being damaged, always use a
piece of paper that is the same thickness
as the male terminal.

Page 1693 of 2000

RS–44SUPPLEMENTAL RESTRAINT SYSTEM – AIRBAG SYSTEM
RS
C128723E06

Page 1694 of 2000

SUPPLEMENTAL RESTRAINT SYSTEM – AIRBAG SYSTEMRS–45
RS
C128724E10

Page 1695 of 2000

RS–46SUPPLEMENTAL RESTRAINT SYSTEM – AIRBAG SYSTEM
RS
H043421E04

Page 1696 of 2000

SUPPLEMENTAL RESTRAINT SYSTEM – AIRBAG SYSTEMRS–47
RS
C128726E06

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