Brake

BRAKE SYSTEM

PRECAUTION

1. Necessary care must be taken to replace each part properly as it could affect the brake system performance. This could cause driving hazards. Replace each part with an identical part with the same number.
2. It is very important to keep parts and the area clean when repairing the brake system.
3. If the vehicle is equipped with a mobile communication system, refer to the precautions in the INTRODUCTION section.

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SYSTEM DIAGRAM

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PROBLEM SYMPTOMS TABLE

HINT:

Use the table below to help you find the cause of the problem. The numbers indicate the ranked order of probability of each of the possible causes. Check each part in the order suggested. If necessary, replace the applicable parts.

Table Caption: This table provides a troubleshooting guide for brake system symptoms, linking specific issues like "pedal" or "braking inefficient" to suspected causes and the corresponding page numbers for further information. It categorizes potential problems ranging from fluid leakage and air in the system to worn or damaged components like seals, pistons, pads, and shoes, as well as issues with the booster system and brake drums.

Table Caption: This table lists potential causes for brake noise, categorized by the suspected part and its condition, along with the corresponding page number for further reference. It helps diagnose issues related to brake pads, shoes, discs, drums, mounting hardware, and springs.

ON-VEHICLE INSPECTION

1. INSPECT BRAKE BOOSTER

• (a) Check the air tightness.
• (1) Start the engine and stop it after 1 or 2 minutes. Depress the brake pedal several times slowly. HINT:
• If the pedal can be depressed to the floor on the 1st time, but cannot be depressed as far on the 2nd or 3rd times, the booster is airtight. If not, inspect the vacuum check valve.
• If the vacuum check valve is normal, replace the brake booster assembly.
• (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. If not, inspect the vacuum check valve.
• If the vacuum check valve is normal, replace the brake booster assembly.
• (b) Check the operation.
• (1) Depress the brake pedal several times with the engine stopped 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. If not, inspect the vacuum check valve.
• If the vacuum check valve is normal, replace the brake booster assembly.

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2. INSPECT VACUUM CHECK VALVE

• (a) Check the vacuum check valve.
• (1) Slide the clip and disconnect the vacuum hose.
• (2) Remove the vacuum check valve from the brake booster.
• (3) Check that there is ventilation from the booster to the engine, and no ventilation from the engine to the booster.
• If any fault is found, replace the vacuum hose assembly.
• (4) Install the vacuum check valve onto the brake booster.
• (5) Connect the vacuum hose with the clip.

3. INSPECT PROPORTIONING VALVE (w/o ABS)

• (a) Remove the bleeder plug from the front brake caliper and rear wheel cylinder.
• (b) for Hatchback:
• (1) Install SST and the bleed the air.

SST 09709-29018

• (2) Raise the front brake caliper pressure and inspect the rear wheel cylinder pressure.

Standard fluid pressure

Table Caption: This table compares the pressure in the front brake caliper and the rear wheel cylinder under two different application scenarios, showing how the pressure can vary between the front and rear braking systems.

**Table Caption: This table shows