C2299

Code

Generic C — Chassis

Chassis Control Module Internal Fault

Brand: Generic

Type: C — Chassis

Views: UK: 12 EN: 14 RU: 14

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Internal electronic or processing failure inside the chassis control module
Corrupted or incompatible module software/calibration
Intermittent or low power / poor ground to the module
CAN/LIN bus communication errors or wiring short/open
Physical damage from corrosion, moisture intrusion or impact
Aftermarket installations or recent repairs that affected wiring or grounding

Symptoms

ABS, ESC or traction control warning lights illuminated
Loss or limited operation of stability/traction/ABS functions
Related system warnings or message center alerts present
One or more module communication errors on the scan tool
Intermittent functioning of chassis features (e.g., sporadic ABS activation)
Possible vehicle limp or reduced functionality depending on severity

What to check

Read all stored and pending DTCs and freeze-frame data with a capable scan tool
Attempt to clear the code and see if it returns or is intermittent
Verify battery state-of-charge and battery terminal connections
Inspect CCM connector for bent pins, corrosion, water ingress, or damage
Check module mounting for signs of impact, rust or physical harm
Verify software/calibration ID and check manufacturer Technical Service Bulletins (TSBs)

Signal parameters

Module supply (B+) at key ON: approx. 11–14.5 V (should be stable, no large drops)
Ground continuity: low resistance to chassis (
CAN bus idle voltages: CAN_H ≈ 2.5 V, CAN_L ≈ 2.5 V; dominant state ~3.5 V/1.5 V respectively
LIN bus idle (if present): pulled high near battery voltage, driven low to ~0.3–1.0 V when active
Module wake/standby current: small microamp standby, higher when awake (compare to spec if available)
No high-voltage spikes or excessive noise on power input during key cycles

Diagnostic algorithm

Connect a dealer-level or professional scan tool; record all DTCs, freeze-frame and network status.
Clear DTCs and attempt to re-produce the issue by cycling ignition and driving as needed. Note whether C2299 returns.
Inspect module connectors and harness for corrosion, bent pins, water entry, or chafing. Repair or reseal as needed.
Verify battery condition and measure module supply voltage at the connector with key ON/engine OFF and during cranking; ensure good voltage and no excessive drop.
Check module ground(s) for tightness and low resistance to chassis. Clean and re-torque ground connections.
Monitor CAN/LIN communication while performing wiggle tests on harness; check for bus errors, missing termination or shorts to battery/ground.
If communication faults exist, isolate wiring segments and repair shorts/opens. Replace damaged harness sections or connectors.
Check for and apply any available software updates or reflash procedures per manufacturer instructions. Use correct calibration files and stable programming power.
If wiring, power and software are verified healthy but the fault persists, consider module bench testing (if available) or replacement with programmed/configured unit.
After any repair or module replacement, clear codes, perform relearns/reconfigurations required by the manufacturer, and road test to confirm correction.

Likely causes

Failed internal component (processor, memory, or power regulator) inside CCM
Battery voltage drop or poor battery connection during key-on or programming
Loose or corroded connector pins at the CCM
Faulty or shorted CAN bus wiring, missing termination resistor
Software bug or failed reflash/upgrade
Water or corrosion damage to the module housing or PCB

Fault status

⚠️ Status

Chassis Control Module has reported an internal malfunction. The module may have failed self-tests, experienced internal memory or processor errors, or detected corrupted software. Related chassis functions and communications may be affected.

🔴 Repair difficulty: Hard

⏱️ Diagnostic time: 2.0-4.0 hours