| BRAKES CHATTER OR VIBRATION |
1. Disc brake rotor has excessive thickness variation |
1. Isolate condition as rear or front. Reface or replace brake rotors as necessary. |
| 2. Uneven tire wear or wheel - tire imbalance |
2. Inspect the tires and the wheels. Balance wheel weights. |
| BRAKES DRAG (FRONT OR ALL) |
1. Contaminated brake fluid |
1. Check for swollen seals. Replace all system components containing rubber. |
| 2. Binding caliper pins or bushings |
2. Replace pins and bushings. |
| 3. Binding master cylinder (not fully returning) |
3. Inspect and replace the master cylinder as necessary. |
| 4. Binding brake pedal |
4. Replace the brake pedal bushings. |
| 5. The stop lamp sensor is not adjusted properly, or mounting bracket is bent |
5. Straighten the mounting bracket and replace the stop lamp sensor. Refer to SENSOR, STOP LAMP, REMOVAL AND INSTALLATION
. |
| BRAKES DRAG (REAR ONLY) |
1. Parking brake cables binding or froze up |
1. Check cable routing. Replace cables as necessary. |
| 2. Parking brake cable return spring not returning shoes |
2. Replace cables as necessary. |
| 3. Obstruction inside the center console preventing full return of the parking brake cables |
3. Remove the console and remove obstruction. |
| 4. Operator error |
4. Describe operation of the park brake. |
| BRAKES GRAB |
1. Contaminated brake pad linings. |
1. Inspect and clean, or replace pads and rotors. Repair the source of contamination. |
| 2. Improper power brake booster assist |
2. Refer to power brake booster in this service information. |
| 3. Damaged wheel or tire, or wheel imbalance |
3. Inspect the wheels and tires. Balance the wheels. |
| EXCESSIVE PEDAL EFFORT |
1. Obstruction of brake pedal |
1. Remove the obstruction. |
| 2. Low power brake booster assist |
2. Refer to the power brake booster in this service information. |
| 3. Glazed brake linings |
3. Reface or replace brake rotors as necessary. Replace brake shoes/pads. |
| 4. Brake pad lining transfer to brake rotor |
4. Reface or replace brake rotors. Replace the brake pads. |
| EXCESSIVE PEDAL EFFORT (HARD PEDAL - CAN'T SKID WHEELS) |
1. Power brake booster runout (vacuum assist) |
1. Check booster vacuum hose and engine tune for adequate vacuum supply. Refer to Power Brake Booster. |
| EXCESSIVE PEDAL TRAVEL (VEHICLE STOPS OK) |
1. Air in the brake lines |
1. Bleed the brake system. |
| 2. Brake fluid low in the reservoir |
2. Fill the reservoir. Check the entire system for leaks, repair or replace as required. |
| EXCESSIVE PEDAL TRAVEL (ONE FRONT WHEEL LOCKS UP DURING HARD BRAKING) |
1. One of the two hydraulic circuits is malfunctioning |
1. Inspect the system for leaks. Check the master cylinder for internal malfunction. |
| PEDAL PULSATES/SURGES DURING BRAKING |
1. Disc brake rotor has excessive thickness variation |
1. Isolate condition as rear or front. Reface or replace brake rotors as necessary. |
| 2. Worn or damaged tires |
2. Inspect the tires and wheels. |
| 3. Loose wheel bearings |
3. Inspect the wheel bearings. |
| 4. Loose calipers |
4. Inspect the calipers. |
| 5. Wheel imbalance |
5. Balance the wheels. |
| PEDAL IS SPONGY |
1. Air in the brake lines |
1. Bleed the brakes. |
| 2. Power brake booster runout (vacuum assist) |
2. Check the booster vacuum hose and engine tune for adequate vacuum supply. Refer to POWER BRAKE BOOSTER, DIAGNOSIS AND TESTING . |
| 3. Electric Vacuum Pump (EVP) not functioning |
3. Refer to the Anti-lock Brake System (ABS) service information and appropriate diagnostic information. |
| PREMATURE REAR WHEEL LOCKUP |
1. Contaminated brake linings |
1. Inspect and clean, or replace the pads. Repair source of contamination. |
| 2.ABS function issue |
2. Refer to the ABS service information and appropriate diagnostic information. |
| STOP LAMPS STAY ON |
1. Stop lamp sensor out of adjustment |
1. Replace the stop lamp sensor. Refer to SENSOR, STOP LAMP, REMOVAL AND INSTALLATION
. |
| 2. Brake pedal binding |
2. Inspect and replace as necessary. |
| 3. Obstruction in pedal linkage |
3. Remove the obstruction. |
| 4. Power brake booster not allowing pedal to return completely |
4. Replace the power brake booster. |
| VEHICLE PULLS TO RIGHT OR LEFT ON BRAKING |
1. Frozen brake caliper piston |
1. Replace the frozen piston or caliper. Bleed the brakes. |
| 2. Contaminated brake pad lining (most likely front lining) |
2. Inspect and clean or replace the pads. Repair the source of contamination. |
| 3. Pinched brake lines |
3. Replace the pinched line. |
| 4. Leaking piston seal |
4. Replace the piston seal or brake caliper. |
| 5. Suspension problem |
5. Refer to the suspension service information. |
| 6. Worn or damaged tires |
6. Inspect the tires and wheels. |
| 7. Wheel imbalance |
7. Balance the wheels. |
| PARKING BRAKE - EXCESSIVE LEVER/HANDLE TRAVEL |
1. Park brake cable out of adjustment |
1. Perform the park brake cable adjustment. Refer to PARKING BRAKE, ADJUSTMENTS . |
| 2. Park brake shoes out of adjustment or worn |
2. Perform the park brake shoe adjustment. Refer to SHOES, PARKING BRAKE, ADJUSTMENTS . |
| 3. Broken or disconnected park brake cable |
3. Replace the park brake cable. Refer to CABLE, PARKING BRAKE, REMOVAL AND INSTALLATION . |
| 4. Dislodged or miss-installed park brake shoe hardware |
4. Properly install the park brake shoes and all hardware. Refer to SHOES, PARKING BRAKE, REMOVAL AND INSTALLATION . |