U1102 — Mitsubishi — ABS/TCS CAN Data Bus Communication Timeout

U1102 (Mitsubishi): ABS/TCS CAN Data Bus Communication Timeout — what it means, the affected system and what to check before replacing parts.

Meaning, symptoms, causes and checks

The control unit failed to receive a timely response from the antilock brake or traction control systems over the CAN bus. Manufacturer-specific definition; confirm applicability in the service information for the exact vehicle.

Affected system: Network

Possible causes

  • CAN bus wiring short or break
  • ABS module failure
  • Weak battery
  • Unstable voltage

What to check

  • Cycle ignition to attempt reset.
  • Test battery health.
  • Inspect CAN bus wiring and fuses.
  • Check ABS sensor condition.
  • Scan for specific module faults.