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Home / DTC / C0700 — Chassis Control Module Circuit Malfunction

C0700 — Chassis Control Module Circuit Malfunction

Detailed page for trouble code C0700.

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C0700

Generic C — Chassis

Chassis Control Module Circuit Malfunction

Brand: Generic
Type: C — Chassis
Views: UK: 4 EN: 5 RU: 6
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Page language: EN

Causes

  • Blown fuse or fusible link for CCM power
  • Poor battery or low system voltage
  • Corroded, loose or damaged CCM connector or wiring (power, ground or CAN lines)
  • High resistance or open ground
  • Short to voltage or short to ground on CCM circuits
  • Intermittent connections or broken wires from vibration or impact

Symptoms

  • Chassis/ESP/ABS/traction-control warning lamp illuminated
  • Reduced or disabled stability/traction control features
  • ABS or braking-related warning messages
  • Loss of some chassis-related functions (electronic differential, hill assist, etc.)
  • Intermittent or permanent fault codes stored and possible limp or degraded mode
  • Possible drivability issues if modules stop communicating

What to check

  • Connect a scan tool; read stored DTCs including network (U‑) codes and freeze frame data
  • Verify battery resting and cranking voltage (11–15 V) and charge state
  • Inspect CCM connector for corrosion, bent pins, water intrusion and secure mating
  • Check related fuses and fusible links for continuity
  • Visually inspect wiring harness for chafing, pinches, or recent repairs
  • Check for other modules reporting loss-of-communication codes on the same bus

Signal parameters

  • Battery supply to CCM: ~11–15 V key on/engine running (nominal ~12–14.5 V)
  • Ground reference: low resistance to chassis (
  • CAN bus idle common-mode ~2.5 V per line (recessive) — healthy differential signaling and message traffic present
  • CAN bus dominant state shows expected differential voltage swing when active
  • Wheel speed sensor pulse frequencies vary with speed (used by CCM for ABS/ESP)
  • No unexpected shorts to battery or ground on CCM power or data pins

Diagnostic algorithm

  1. Record all stored and pending codes; save freeze frame and live data for reference.
  2. Check vehicle battery state and charging system; ensure voltage is within 11–15 V during tests.
  3. Inspect and test fuses/fusible links feeding CCM; replace if blown and retest.
  4. Visually inspect CCM connector and harness; disconnect and inspect pins for corrosion or damage; clean and reseal as required.
  5. With connector connected, measure supply voltage and ground continuity at CCM pins; repair any open/high resistance circuits.
  6. Use a scan tool to monitor CAN bus traffic and check for U‑codes indicating lost comms; if bus is silent or shows errors, isolate network segment.
  7. Perform continuity and short checks between CCM power, ground and CAN lines back to fuse/ground points; repair wiring faults.
  8. If wiring and power/ground are good and CAN communication is normal but code persists, check for related sensor/actuator faults that could present as CCM errors.
  9. If all external checks pass, verify module software level and perform reflash/update per manufacturer service info; clear codes and retest.
  10. If reprogramming unavailable or unsuccessful, consider module replacement. After repair, clear codes and road‑test to confirm issue is resolved.
  11. Safety note: secure the vehicle, disable airbags or follow manufacturer procedures when working near restraint system modules or wiring.

Likely causes

  • Blown fuse or low battery voltage
  • Corroded/loose connector at CCM or poor ground
  • Damaged or shorted CAN/data wiring between CCM and network
  • Intermittent open or high-resistance power supply to CCM
  • Failed CCM requiring replacement or reflash

Fault status

⚠️ Status
Chassis Control Module detected an electrical or communication malfunction in its circuits or network.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1-3 hours

Similar codes

C0035 C0040 C0050 U0100 U0121 U0073
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