ABS System Specialists
ABS diagnosis requires OEM-level scan tools — generic code readers cannot access the full functionality of heavy-duty ABS systems. CTR uses Bendix ACom, Meritor WABCO Toolbox, and Haldex diagnostic platforms for complete fault code retrieval, live data monitoring, and component testing.
Wheel speed sensors are the most common ABS failure, but the root cause could be the sensor, tone ring, wiring, connector, or air gap. Accurate diagnosis identifies the actual failure — not just the symptom code.
Located on Armentrout Drive directly off I-85 at Exit 58. All ABS repairs backed by our 3-year, 36,000-mile warranty.
OEM Diagnostics
Bendix ACom, WABCO Toolbox, Haldex platforms.
Sensor Experts
Wheel speed sensor testing, replacement, tone ring service.
Tractor & Trailer
Complete ABS service for trucks and all trailer brands.
3-Year Warranty
Industry-leading warranty on all ABS repairs.
Complete ABS Repair Services
Diagnosis to repair. Click any service for details.
OEM-level diagnostic tools for full fault code retrieval, live sensor data monitoring, component testing, and code clearing. Bendix ACom, WABCO Toolbox, Haldex platforms.
ABS Warning Signs
ABS Light Stays On
ABS ECU has detected a fault. Regular brakes work but no anti-lock protection. DOT violation.
ABS Activates on Dry Pavement
Failed sensor, tone ring damage, or modulator malfunction causing inappropriate activation.
Wheels Lock During Braking
ABS not functioning — wheels lock on slippery surfaces. Loss of control risk.
Stability Control Warning
ESC system fault — roll stability and yaw control compromised.
Air Leak at Modulator
Failed modulator valve leaking air. Affects brake pressure and ABS function.
Trailer ABS Lamp On
Trailer ABS fault — check 7-pin connector, sensors, and trailer ECU.
ABS Repair Cost Guide
| Service | Cost Range |
|---|---|
| ABS Diagnostic Scan | $150–$300 |
| Wheel Speed Sensor | $200–$500/sensor |
| Modulator Valve | $400–$1,200/valve |
| ABS ECU Replacement | $500–$2,000+ |
| Wiring/Connector Repair | $150–$600 |
| Trailer ABS Service | $200–$1,500+ |
Written estimates before work begins. 3-year, 36,000-mile warranty.
OEM Diagnostic Platforms
Full fault codes, live data, component testing
Complete diagnostics, sensor & modulator testing
Fault retrieval, live monitoring, configuration
Understanding ABS Systems
ABS prevents wheel lockup during hard braking by rapidly cycling brake pressure at individual wheels. Without functioning ABS, locked wheels cause loss of steering control and increased stopping distance on slippery surfaces.
Wheel Speed Sensors
Mounted at each wheel, sensors read a toothed tone ring to detect rotational speed. The ECU compares all wheel speeds — when one decelerates faster than the vehicle, ABS intervenes.
Modulator Valves
Solenoid-operated pneumatic valves that rapidly reduce, hold, and reapply brake pressure at individual wheels. This cycle repeats multiple times per second during an ABS event.
ABS ECU
The brain of the system. Monitors all sensor signals, detects impending lockup, commands modulator valves, stores fault codes, and controls the ABS warning lamp.
Stability Control (ESC)
Builds on ABS with lateral accelerometers, yaw rate sensors, and steering angle sensors. Detects impending rollover and jackknife situations, automatically intervening.
Built for Heavy Duty
CTR's facility on Armentrout Drive has the OEM diagnostic platforms, ABS testing equipment, and bay space for complete ABS system diagnosis and repair on any truck or trailer.
DOT Compliance
ABS malfunctions generate CSA points during roadside inspections. Keep your fleet compliant with proper ABS maintenance and prompt repair of warning lamp issues.
(704) 786-0132
ABS Repair Near You
CTR Heavy Duty — Concord
Directly off Interstate 85 at Exit 58. Easy truck access.
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