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Toyota Sequoia (2005). Manual - part 277
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DIAGNOSTICS
ABS WITH EBD & BA & TRAC & VSC SYSTEM
DI–903
1097
HINT:
If the VSC buzzer sounds twice, the sensor check has
been completed normally.
If the VSC buzzer does not sound, check the VSC buzzer
circuit (see page
again.
Drive the vehicle through 180
°
. At the end of the turn its
check, the direction of the vehicle should be within 180
°
±
5
° of its start position.
Do not spin the wheels.
If the buzzer sounds after start off, then the deceleration
sensor check has passed its check. If the buzzer sounds
at the completion of a turn its check, then the yaw rate
sensor check has passed. The buzzer sound should be
heard during the sensor checks.
(c)
Check the master cylinder pressure sensor.
(1)
Turn the ignition switch to the ON position.
(2)
Keep the vehicle in a stationary condition on a level
surface for 2 sec. or more.
(3)
Keeping the vehicle in a stationary condition and
not pressing on the brake pedal for 1 sec. or more,
depress the brake pedal with 147 N (15 kgf, 33 lbf)
or more for 2 sec. or more on a new ECU.
NOTICE:
If zero point calibration has never been performed on a new
ECU, master cylinder pressure sensor check cannot be
completed correctly. Perform zero point calibration first
(See page
HINT:
At this time, the buzzer sounds for 3 seconds.
(d)
Check the speed sensor.
Drive the vehicle straight forward.
When driving the vehicle at the speed of 28 mph (45 km/h)
or higher for several seconds, check that the ABS warn-
ing light goes off.
HINT:
There is a case that the sensor check is not completed if the ve-
hicle has its wheels spun or its steering wheel turned during this
check.
(e)
Stop the vehicle.
(f)
Read the DTC by following the prompts on the tester
screen.
HINT:
Refer to the hand–held tester operator’s manual for further de-
tails.