| 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/wheel - tire imbalance. |
2. Inspect tires & 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 master cylinder as necessary. |
| 4. Binding brake pedal. |
4. Replace brake pedal/bushings. |
| 5. Brake lamp switch not adjusted properly and mounting bracket is bent. |
5. Straighten mounting bracket and replace brake lamp switch, refer to 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 console and remove obstruction. |
| 4. Operator error. |
4. Describe operation of electric park brake |
| 5. Electric park brake does not release. |
5. Refer to PARKING BRAKE
. |
| 6. Electric Parking Brake (EPB) caliper actuators (one or both) are not released. Or the EPB module or EPB actuators are not responding. |
6. EPB module will set codes. |
| BRAKES GRAB |
1. Contaminated brake pad/shoe linings. |
1. Inspect and clean, or replace shoes/pads and rotors. Repair source of contamination. |
| 2. Improper power brake booster assist. |
2. Refer to
Power Brake Booster in this article. |
| 3. Damaged wheel or tire. Wheel - tire imbalance. |
3. Inspect wheels and tires. Balance wheel weights. |
| EXCESSIVE PEDAL EFFORT |
1. Obstruction of brake pedal. |
1. Inspect, remove or move obstruction. |
| 2. Low power brake booster assist. |
2. Refer to
Power Brake Booster in this article. |
| 3. Glazed brake linings. |
3. Reface or replace brake rotors as necessary. Replace brake shoes/pads. |
| 4. Brake shoe/pad lining transfer to brake rotor. |
4. Reface or replace brake rotors as necessary. Replace brake shoes/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 brake lines. |
1. Bleed brakes. |
| 2. Brake fluid low in reservoir. |
2. Fill reservoir. Check 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 system for leaks. Check 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 tires and wheels. |
| 3. Loose wheel bearings. |
3. Inspect wheel bearings. |
| 4. Loose calipers. |
4. Inspect calipers. |
| 5. Wheel - Tire imbalance. |
5. Balance wheel weights. |
| PEDAL IS SPONGY |
1. Air in brake lines. |
1. Bleed brakes. |
| 2. Power brake booster runout (vacuum assist). |
2. Check booster vacuum hose and engine tune for adequate vacuum supply. Refer to Power Brake Booster diagnosis and testing. |
| 3. ABS 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 pads. Repair source of contamination. |
| 2. Anti-lock brake system function issue. |
2. Refer to the ANTI-LOCK BRAKE SYSTEM (ABS) (SERVICE INFORMATION)
and appropriate diagnostic information. |
| STOP LAMPS STAY ON |
1. Stop/Brake lamp switch out of adjustment. |
1. Replace stop lamp switch, refer to REMOVAL AND INSTALLATION
. |
| 2. Brake pedal binding. |
2. Inspect and replace as necessary. |
| 3. Obstruction in pedal linkage. |
3. Remove obstruction. |
| 4. Power brake booster not allowing pedal to return completely. |
4. Replace power brake booster. |
| VEHICLE PULLS TO RIGHT OR LEFT ON BRAKING |
1. Frozen brake caliper piston. |
1. Replace frozen piston or caliper. Bleed brakes. |
| 2. Contaminated brake shoe/pad lining (most likely front lining). |
2. Inspect and clean, or replace pads. Repair source of contamination. |
| 3. Pinched brake lines. |
3. Replace pinched line. |
| 4. Leaking piston seal. |
4. Replace piston seal or brake caliper. |
| 5. Suspension problem. |
5. Refer to FRONT SUSPENSION & WHEEL ALIGNMENT
or REAR SUSPENSION
the Suspension section. |
| 6. Worn or damaged tires. |
6. Inspect tires and wheels. |
| 7. Wheel - Tire imbalance. |
7. Balance wheel weights. |
| PARKING BRAKE - EXCESSIVE LEVER/HANDLE TRAVEL |
1. Broke cable. |
1. Replace broken cable. |
| 2. Binding cable. |
2. Replace binding cable. |
| 3. Damaged lever at rear brake caliper. |
3. Replace rear brake caliper. |
| 4. Parking brake shoes/pads out of adjustment. |
4. Adjust parking brake shoes/pads. |
| 5. Binding/frozen rear brake caliper piston. |
5. Replace rear brake caliper. |