2008 TOYOTA 4RUNNER brake sensor

iv
In order to be effective, the SRS airbags must deploy with
tremendous speed. The rapid deployment of the SRS air-
bags makes the SRS airbags themselves potential sources
of death or serious injury if an occupant is too close to an
airbag, or if an object or some part of his or her body has
been placed between the occupant and the airbag at the
time of deployment. This is just one example of how the
instructions in Section 1−3 of this Owner ’s Manual will help
ensure proper use of the occupant restraint systems, and
increase the safety they can provide to you and your fami-
ly in the event of an accident.
Toyota recommends you to read the provisions in Section
1−3 carefully and refer to them as needed during your time
of ownership of this vehicle.Event data recorder
Your vehicle has computers that monitor and control cer-
tain aspects of your vehicle. These computers assist in
driving and maintaining optimal vehicle performance. Be-
sides storing data useful for troubleshooting, there is a
system to record data in a crash or a near car crash
event. This is called an Event Data Recorder (EDR).
The SRS airbag sensor assembly contains the EDR. In a
crash or a near car crash event, this device may record
some or all of the following information:Engine speed
 Whether the brake pedal was applied or not
 Vehicle speed
 To what extent the accelerator pedal was depressed
 Position of the transmission selector lever
 Whether the driver and front passenger wore the
seat belts or not
 Driver’s seat position
 Front passenger ’s occupant classification

157
Either of the following conditions may
occur, but do not indicate a malfunc-
tion:
The light may stay on for about 60
seconds after the engine switch is
turned to the ON" position. It is nor-
mal if it turns off after a while.
Depressing the brake pedal repeatedly
may turn on the light. It is normal if it
turns off after a few seconds.
(j) VSC OFF" Warning Light
The light flashing warns that there is a
problem somewhere in the following.
Vehicle stability control system
Traction control system
(two−wheel drive models)
Active traction control system
(four−wheel drive models)
AUTO LSD" system
(two−wheel drive models)
Downhill assist control system
(four−wheel drive models)
Hill−start assist control system
The light will come on when the engine
switch turned to ON", and will go off after
a few seconds. It is not a malfunction that the warning
light may stay on for 60 seconds after the
engine switch is turned to the ON" posi-
tion.
Depressing the brake pedal repeatedly
may turn on the lights. It is normal if they
go out after a few seconds.
If the light flashes while driving, the above
mentioned systems do not work. However,
as conventional braking operates when ap-
plied, there is no problem to continue your
driving.
In the following cases, contact your Toyota
dealer:
The warning light does not come on
after the engine switch is turned to
ON".
The warning light remains on after the
engine switch is turned to ON".
The warning light flashes while driving.
When the brake fluid level is too low, the
above mentioned systems will not operate
and the warning light comes on.
(k) Open Door Warning Light
This light remains on until all the side
doors and back door are completely
closed. (l) SRS Warning Light
This indicator comes on when the en-
gine switch is turned to the ON" posi-
tion. It goes off after about 6 seconds.
This means the SRS airbags and seat
belt pretensioners are operating proper-
ly.
This warning light system monitors the
airbag sensor assembly, front airbag sen-
sors, side and curtain shield airbag sen-
sors, curtain shield airbag sensors, driv-
er ’s seat position sensor, driver ’s seat belt
buckle switch, front passenger occupant
classification system and indicator light,
front passenger ’s seat belt buckle switch,
seat belt pretensioner assemblies, inflat-
ors, RSCA OFF" indicator light, intercon-
necting wiring and power sources.
If any of the following conditions occurs,
this indicates a malfunction of the airbags
or seat belt pretensioners. Contact your
Toyota dealer as soon as possible.
The light does not come on when the
engine switch is turned to the ON"
position or remains on for more than
6 seconds or flashes.
The light comes on or starts flashing
while driving.

347
Driving with tire chains installed.
Driving over the steps such as the
joints on the road.
Driving on roads where the road
surface is pitted or has other differ-
ences in surface height.
Install all 4 tires of specified size at
appropriate pressure: The anti−lock
brake system detects vehicle speeds
using the speed sensors for respec-
tive wheels’ turning speeds. The use
of tires other than specified may fail
to detect the accurate turning speed
resulting in a longer stopping dis-
tance.
CY20034
Ty p e A
CY20032
Ty p e B
ABS" warning light
The light comes on when the engine
switch is turned to the ON" position. If
the anti−lock brake system and the brake
assist system work properly, the light
turns off after a few seconds. Thereafter,
if either of the systems malfunctions, the
light comes on again.
When the ABS" warning light is on (and
the brake system warning light is off), the
following systems do not operate, but the
brake system still operates conventionally.
Anti−lock brake system
Brake assist system
Traction control system
(two−wheel drive models)
Active traction control system
(four−wheel drive models)
AUTO LSD" system
(two−wheel drive models)
Vehicle stability control system
Downhill assist control system
(four−wheel drive models)
Hill−start assist control system

469
19. ECU−B 10 A: Anti−lock brake system,
traction control system (two−wheel
drive models), active traction control
system (four−w heel drive models), ve-
hicle stability control system, air c ondi-
tioning system, multiplex communica-
tion system, theft deterrent system,
driving position memory system, front
passenger occupant classification sys-
tem
20. ALT−S 7.5 A: Charging system
21. HORN 10 A: Horns
22. A/F HEATER 15 A: A/F sensor
23. TRN−HAZ 15 A: Turn signal lights,
emergency flashers
24. ETCS 10 A: Multiport fuel injection
system/s equential multiport fuel injec-
tion system
25. EFI 20 A: Multiport fuel injection sys-
tem/sequential multiport fuel injection
system
26. DR/LCK 20 A: Power door lock system
27. TOWING 30 A: Towing converter
28. RADIO NO.2 20 A: Audio system29. IGN 10 A:
Multiport fuel injection sys-
tem/sequential multiport fuel injection
system, anti−lock brake system, trac-
tion control system (two−wheel drive
models), active traction control system
(four−wheel drive models), vehicle sta-
bility control system, meter and g auge,
front passenger occupant classification
system
30. SRS 10 A: SRS airbag system
31. GAUGE 7.5 A: Meter and gauge
32. STA NO.2 7.5 A: Multiport fuel injec-
tion system/sequential multiport fuel in-
jection system
33. FR WIP−WSH 30 A: Windshield wipers
and washer
34. 4WD 20 A: Four−wheel drive control
system
35. D P/SEAT 30 A: Driver ’s power seat
36. P P/SEAT 30 A: Front passenger ’s
power seat
37. PWR OUTLET 15 A: Power outlets
38. RR WSH 15 A: Back window washer,
multiplex communication system 39. ECU−IG 10 A:
Shift lock control sys-
tem, power windows, anti−lock brake
system, traction control system (two−
wheel drive models), active traction
control system (four−wheel drive mod-
els), vehicle stability control system,
electric moon roof, multiplex commu-
nication system, theft deterrent system,
rear height control air suspension, tire
pressure warning system, driving posi-
tion memory system
40. IG1 15 A: Anti−lock brake system,
traction control system (two−wheel
drive models), active traction control
system (four−w heel drive models), ve-
hicle stability control system, air c ondi-
tioning system, charging system, back
window defogger, back−up lights, emer-
gency flashers, seat heaters, AC invert-
er, instrument panel light control, auto
anti−glare inside rear view mirror, seat
belt tension reducer
41. STA 7.5 A: No circuit
42. SECU/HORN 10 A: Theft deterrent sys-
tem