Toyota Tundra 2005 Service - Repair - Maintenance page 2652

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HYDRAULIC BRAKE BOOSTER (w/ VSC)

Inspect rear VSC solenoid (SREC) operation.

ON: Depress the brake pedal and activate SREC. Re-

lease the brake pedal and check that the rear wheels do

OFF: Deactivate SREC and check that the rear wheels ro-

Select "SRMF (SMCF, SA3)" on the hand−held tes-

Depress the brake pedal with stable force, then turn

the "SRMF (SMCF, SA3)" on by the hand−held tes-

Release the brake pedal when the solenoid is on,

and check that the rear wheels do not rotate by

If the rear wheels rotate, replace the hydraulic brake booster.

When operating it continuously, set the interval of more

than 20 seconds.

To protect the solenoids, the hand−held tester turns off

automatically 2 seconds after every solenoid has been

When rotating the wheels fast, the fail−safe function is ac-

tivated and judgement cannot be made properly.

So rotate the wheels as slowly as possible.

When the solenoid is off, check the rear wheels by

rotating them by hand.

If the rear wheels stop, replace the hydraulic brake booster.