Toyota Sienna Service Manual: On-vehicle inspection
1. INSPECT BRAKE BOOSTER
(a) Air tightness check.
(1) Start the engine and stop it after 1 or 2 minutes.
Depress the brake pedal several times slowly.
HINT: If the pedal goes down farthest at the 1st time, and gradually rises at the 2nd or 3rd time, the booster is airtight.
(2) Depress the brake pedal while the engine is running, and stop the engine with the pedal depressed.
HINT: If there is no change in the pedal reserve distance after holding the pedal for 30 seconds, the booster is airtight.
(b) Operating check.
(1) Depress the brake pedal several times with the ignition switch OFF and check that there is no change in the pedal reserve distance.
(2) Depress the brake pedal and start the engine.
HINT: If the pedal goes down slightly, the operation is normal.
Brake booster
COMPONENTS
...
Removal
NOTICE:
Do not adjust the brake booster push rod.
Do not change the combination of the diameter
converting unit and brake.
1. REMOVE FRONT WHEEL
2. DRAIN BRAKE FLUID
NOTICE:
Wash the bra ...
Other materials:
Customize parameters
HINT:
The following items can be customized.
NOTICE:
After confirming whether the items requested by the
customer are applicable or not for customization,
perform customizing operations.
Be sure to record the current settings before
customization.
When troubleshooti ...
Terminals of ECU
1. CHECK POWER BACK DOOR ECU
Disconnect the P13 and P14 ECU connectors, and
check the voltage and resistance of each terminal of
the wire harness side connectors
If the result is not as specified, there may be a
malfunction on the wire harness side.
Reconnect the ECU co ...
Installation
1. INSTALL BRAKE VACUUM CHECK VALVE
ASSEMBLY
(a) Install the brake vacuum check valve assembly and
check valve grommet to the brake booster
assembly.
2. INSTALL BRAKE BOOSTER GASKET
(a) Install a new brake booster gasket to the brake
booster with master cylinder.
3. INSTALL BRAKE MASTER CYLI ...
