Scania Brake System Workshop Manual and Servicing
Scania Brake System Workshop Manual and Servicing — a detailed guide to diagnostics, maintenance and repair of the brake system of Scania trucks. Includes diagrams of pneumatic and electronic components (EBS), a description of the ABS operation, instructions for replacing brake chambers, regulators, valves and calipers. Typical brake system faults, Error Codes and methods for eliminating them are presented. Suitable for mechanics, service specialists and equipment owners, ensuring safe and efficient operation of the Scania brake system.
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Typical Scania brake system error codes:
1. EBS – Electronic Brake System
C111 — EBS module power failure
🔧 Cause: Broken/corroded wiring, relay or fuse failure
✔ Solution: Check power supply, replace damaged components
C113 — Brake circuit pressure sensor error
🔧 Cause: Damaged sensor or connector
✔ Solution: Check and replace the pressure sensor
C115 — Lost communication with ABS module
🔧 Cause: Problems in the CAN bus or control module
✔ Solution: Diagnostics of the CAN line, check connections
C119 — Rear axle brake valve block malfunction
🔧 Cause: Stuck or damaged valve
✔ Solution: Clean, replace valve if necessary
2. ABS – Anti-lock braking system
C121 — Wheel speed sensor: no signal
🔧 Cause: Damaged sensor, broken wire
✔ Solution: Check and replace the speed sensor
C122 — Speed sensor: signal out of range
🔧 Cause: Gap is broken, rust, toothed disk is damaged
✔ Solution: Clean, adjust or replace the sensor/disc
C124 — Different speed signal between wheels of the same axle
🔧 Cause: One of the sensors gives distorted data
✔ Solution: Compare data, replace the faulty sensor
3. Common errors
U0122 — Lost communication between the brake control unit and other ECUs
🔧 Cause: CAN network, modules, connectors
✔ Solution: Check communications and all units
C123 — Low pressure in the pneumatic system
🔧 Cause: Air leak, compressor malfunction
✔ Solution: Find and fix the leak, replace faulty components