Toyota Tundra 2005 Service - Repair - Maintenance page 2656

BR−80
BRAKE − HYDRAULIC BRAKE BOOSTER (w/ VSC)
(l) Inspect rear ABS solenoid (SRRR) operation.
HINT:
S
ON: Depress the brake pedal, activate SRRR and SRRH,
and then check that the right rear wheel rotates.
S
OFF: Deactivate SRRR and SRRH, depress the brake
pedal, and then check that the right rear wheel does not
rotate.
(1) Select "SRH & SRR" on the hand−held tester.
(2) Depress the brake pedal with stable force, then turn
the "SRH & SRR" on simultaneously by the hand−
held tester.
(3) When the solenoids are on, check the right rear
wheel by rotating it by hand.
If the right rear wheel stops, replace the hydraulic brake boost-
er.
NOTICE:
When operating it continuously, set the interval of more
than 20 seconds.
HINT:
S
To protect the solenoids, the hand−held tester turns off
automatically 2 seconds after every solenoid has been
turned on.
S
When rotating the wheel fast, the fail−safe function is acti-
vated and judgement cannot be made properly.
So rotate the wheel as slowly as possible.
(4) When the solenoids are off, depress the brake ped-
al again and check that the right rear wheel does not
rotate by hand.
If the right rear wheel rotates, replace the hydraulic brake boost-
er.