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Home / DTC / C2390 — Chassis Control Module Fault

C2390 — Chassis Control Module Fault

Detailed page for trouble code C2390.

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C2390

Generic C — Chassis

Chassis Control Module Fault

Brand: Generic
Type: C — Chassis
Views: UK: 3 EN: 4 RU: 3
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Page language: EN

Causes

  • Faulty chassis control module (hardware/software)
  • Loss of power or poor battery/ignition supply to module
  • Poor ground connection at module
  • Damaged wiring or corroded/loose connectors to CCM
  • CAN/LIN bus communication fault or missing messages from other modules
  • Blown fuse or relay feeding the CCM

Symptoms

  • MIL/ABS/ESC/traction warning lamp illuminated or multiple warning lamps
  • Loss or degradation of ABS, traction control, stability control, or related chassis assist functions
  • Stored communication errors or multiple related DTCs present
  • Intermittent or permanent loss of CCM-driven features (cruise, hill assist, etc.)
  • Vehicle may enter limp or reduced functionality mode
  • Erratic or unavailable sensor readings tied to chassis control

What to check

  • Connect a professional scan tool and read all stored/active codes and freeze frame data
  • Record VIN-specific and module-specific codes from CCM and related modules (ABS, BCM, ECM)
  • Verify battery voltage and charging system (key on and cranking)
  • Visually inspect CCM connector(s) and harness for corrosion, damage, rodent chew, or water intrusion
  • Check fuses and relays related to the CCM power feed
  • Use the scan tool to confirm CAN/LIN bus status and whether CCM is present/responding on the network

Signal parameters

  • Module supply voltage (key ON): typically ~11–14.5 V — must meet manufacturer spec
  • Ground continuity: low resistance between module ground and chassis (
  • CAN bus idle/recessive voltage: each CAN line ~2.5 V (verify manufacturer spec) and correct differential behavior during activity
  • CAN bus termination: overall bus impedance ~60 Ω across CAN_H and CAN_L (two 120 Ω terminators in parallel)
  • Communication presence: module should respond to diagnostic requests and show alive messages/heartbeat on network trace
  • Sensor input signals to CCM (wheel speed, yaw rate, steering angle) should be within expected ranges for the vehicle — compare to known-good traces

Diagnostic algorithm

  1. Read and log all codes from CCM and other modules; note freeze frame and occurrence counters
  2. Check battery state of charge and charging system; ensure stable supply voltage
  3. Inspect and secure CCM connectors; disconnect and re-pin-check for corrosion, bent pins, or water; clean and reconnect
  4. Verify and test fuses/relays feeding the CCM; replace if faulty
  5. Measure supply voltage and ground at the CCM connector with key ON/engine off and during cranking; repair poor connections
  6. Scan the CAN/LIN bus for communication faults. Use an oscilloscope or scope-capable scan tool to view CAN_H and CAN_L signals for proper recessive/dominant voltages and noise
  7. If communication is absent, trace harness for opens/shorts to other modules or termination resistors; repair wiring as needed
  8. Check related sensors (wheel speed, yaw, steering angle) for proper signals; repair or replace failing sensors if they cause CCM errors
  9. Clear codes and perform a test drive to confirm fault does not return after repairs
  10. If hardware, software or internal module fault is suspected after electrical checks, check for manufacturer reflash/recall/software update and program the CCM per factory procedure
  11. If module replacement is required, follow dealer/manufacturer procedures for configuration, coding, and security pairing; verify all related systems after replacement

Likely causes

  • Poor power/ground at CCM (corrosion, loose terminal)
  • Open/short or intermittent wiring on CAN bus or CCM harness
  • Connector corrosion or bent pins at module or junction block
  • Blown fuse or failed relay supplying CCM
  • Software/firmware error or missing reflash after module replacement

Fault status

⚠️ Status
CCM fault: module reported an internal fault or lost/erratic communication. Chassis control functions may be limited or disabled until cause is corrected.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.0 hours

Similar codes

U0100 U0073 U0121 P0606 C0035
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