Toyota Yaris: Brake Booster / On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT BRAKE BOOSTER ASSEMBLY
(a) Airtightness check
| (1) Start the engine and stop it after 1 or 2 minutes. Slowly depress the brake pedal several times. HINT: If the brake pedal can be depressed nearly to the floor the first time, but on the 2nd and 3rd time cannot be depressed as far, the brake booster assembly is airtight. |
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(2) Depress the brake pedal with the engine running, and stop the engine with the brake pedal depressed.
HINT:
If there is no change in the brake pedal reserve distance while holding the brake pedal depressed for 30 seconds, the brake booster assembly is airtight.
(b) Operation check
| (1) Depress the brake pedal several times with the ignition switch off and check that there is no change in the brake pedal reserve distance when the brake pedal is depressed. |
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| (2) Depress and hold the brake pedal, then start the engine. HINT: If the brake pedal goes down slightly, operation is normal. |
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Disassembly
DISASSEMBLY PROCEDURE 1. REMOVE BRAKE VACUUM CHECK VALVE ASSEMBLY (a) Remove the brake vacuum check valve assembly from the brake booster assembly. (b) Remove the check valve grommet from the brake booster assembly...
Other information:
Toyota Yaris XP210 (2020-2025) Reapir and Service Manual: How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT: *: Use the GTS. PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP NEXT 2. CUSTOMER PROBLEM ANALYSIS (a) Interview the customer and confirm the problem. Click here NEXT 3...
Toyota Yaris XP210 (2020-2025) Reapir and Service Manual: Removal
REMOVAL CAUTION / NOTICE / HINT The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed and installed, or replaced during engine unit removal/installation are shown below. Necessary Procedure After Parts Removed/Installed/Replaced Replaced Part or Performed Procedure Necessary Procedure Effect/Inoperative Function when Necessary Procedure not Performed Link Engine assembly Cylinder head sub-assembly Camshaft (for intake or exhaust camshaft) Camshaft timing gear assembly Camshaft timing exhaust gear assembly Fuel injector assembly Fuel pump (for low pressure side) Fuel pump assembly (for high pressure side) Fuel pressure sensor (for low pressure side) Fuel pressure sensor (for high pressure side) Spark plug Ignition coil assembly Air intake system parts Exhaust system parts Turbocharger sub-assembly Inspection after repair Poor idle, etc...
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Key Suspend Function
If a key is left in the vehicle, the functions of the key left in the vehicle are temporarily suspended to prevent theft of the vehicle.
To restore the functions, press the unlock button on the functions-suspended key in the vehicle.
