AGM 114 - Brakes, ABS, TCS Service

1. Diagnose general brake systems.  Complete 95% of Priority 1, 80% of Priority 2, and 50% of Priority 3 NATEF tasks as listed below.
   1. Identify and interpret brake system concern; determine necessary action.  P-1
   2. Research applicable vehicle and service information, such as brake system operation, vehicle service history, service precautions, and technical service bulletins.  P-1
   3. Locate and interpret vehicle and major component identification numbers (VIN, vehicle certification labels, calibration decals).  P-1
2. Diagnose and repair hydraulic system.  Complete 95% of Priority 1, 80% of Priority 2, and 50% of Priority 3 NATEF tasks as listed below.
   1. Diagnose pressure concerns in the brake system using hydraulic principles (Paschal's Law).                 P-1
   2. Measure brake pedal height; determine necessary action.  P-2
   3. Check master cylinder for internal and external leaks and proper operation; determine necessary action.  P-2
   4. Remove, bench bleed, and reinstall master cylinder.  P-1
   5. Inspect brake lines, flexible hoses, and fittings for leaks, dents, kinks, rust, cracks, bulging or wear; tighten loose fittings and supports; determine necessary action.  P-2
   6. Fabricate and/or install brake lines (double flare and ISO types); replace hoses, fittings, and supports as needed.  P-2
   7. Select, handle, store, and fill brake fluids to proper level.  P-2
   8. Bleed (manual, pressure, vacuum or surge) brake system.  P-1
   9. Flush hydraulic system.  P-3
3. Diagnose and repair drum brake systems.  Complete 95% of Priority 1, 80% of Priority 2, and 50% of Priority 3 NATEF tasks as listed below.
   1. Remove, clean (using proper safety procedures), inspect, and measure brake drums; determine necessary action.  P-1
   2. Refinish brake drum.  P-1
   3. Remove, clean, and inspect brake shoes, springs, pins, clips, levers, adjusters/self-adjusters, other related brake hardware, and backing support plates; lubricate and reassemble.  P-1
   4. Remove, inspect, and install wheel cylinders.  P-2
   5. Pre-adjust brake shoes and parking brake before installing brake drums or drum/hub assemblies and wheel bearings.  P-1
   6. Install wheel, torque lug nuts, and make final checks and adjustments.  P-1
4. Diagnose and repair disc brake systems.  Complete 95% of Priority 1, 80% of Priority 2, and 50% of Priority 3 NATEF tasks as listed below.
   1. Remove caliper assembly from mountings; clean and inspect for leaks and damage to caliper housing; determine necessary action.  P-1
   2. Clean and inspect caliper mounting and slides for wear and damage; determine necessary action.  P-1
   3. Remove, clean, and inspect pads and retaining hardware; determine necessary action.  P-1
   4. Disassemble and clean caliper assembly; inspect parts for wear, rust, scoring, and damage; replace seal, boot, and damaged or worn parts.  P-2
   5. Reassemble, lubricate, and reinstall caliper, pads, and related hardware; seat pads, and inspect for leaks  P-1
   6. Clean, inspect, and measure rotor with a dial indicator and a micrometer; follow manufacturer’s recommendations in determining need to machine or replace.  P-1
   7. Remove and reinstall rotor.   P-1
   8. Refinish rotor according to manufacturer’s recommendations.  P-1
   9. Install wheel, torque lug nuts, and make final checks and adjustments.  P-1
5. Diagnose and repair power assist units.  Complete 95% of Priority 1, 80% of Priority 2, and 50% of Priority 3 NATEF tasks as listed below.
   1. Test pedal free travel with and without engine running; check power assist operation.  P-2
   2. Check vacuum supply (manifold or auxiliary pump) to vacuum-type power booster.  P-2
   3. Inspect the vacuum-type power booster unit for vacuum leaks; inspect the check valve for proper operation; determine necessary action.  P-2
6. Diagnose and repair miscellaneous (wheel bearings, parking brakes, electrical I, etc.) Complete 95% of Priority 1, 80% of Priority 2, and 50% of Priority 3 NATEF tasks as listed below.
   1. Remove, clean, inspect, repack, and install wheel bearings and replace seals; install hub and adjust wheel bearings.  P-1
   2. Check parking brake cables and components for wear, rusting, binding, and corrosion; clean, lubricate, or replace as needed.  P-2
   3. Check parking brake operation; determine necessary action.  P-1
   4. Check operation of parking brake indicator light system.  P-3
   5. Check operation of brake stop light system; determine necessary action.  P-1
   6. Replace wheel bearing and race.  P-1
   7. Inspect and replace wheel studs.  P-1
   8. Remove and reinstall sealed wheel bearing assembly.  P-2
7. Diagnose and repair antilock brake and traction control systems.  Complete 95% of Priority 1, 80% of Priority 2, and 50% of Priority 3 NATEF tasks as listed below.
   1. Identify and inspect antilock brake system (ABS) components; determine necessary action. P-1
   2. Diagnose antilock brake system (ABS) electronic control(s) and components using self-diagnosis and/or recommended test equipment; determine necessary action.  P-1
   3. Depressurize high-pressure components of the antilock brake system (ABS).  P-3
   4. Bleed the antilock brake system’s (ABS) front and rear hydraulic circuits.  P-2
   5. Remove and install antilock brake system (ABS) electrical/electronic and hydraulic components.  P-3
   6. Test, diagnose and service ABS speed sensors, toothed ring (tone wheel), and circuits using a graphing multimeter (GMM)/digital storage oscilloscope (DSO) (includes output signal, resistance, shorts to voltage/ground, and frequency data).  P-1
   7. Identify traction control system components.  P-3