C0700

Code

Generic C — Chassis

Chassis Control Module Circuit Malfunction

Brand: Generic

Type: C — Chassis

Views: UK: 20 EN: 64 RU: 21

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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

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

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

Record all stored and pending codes; save freeze frame and live data for reference.
Check vehicle battery state and charging system; ensure voltage is within 11–15 V during tests.
Inspect and test fuses/fusible links feeding CCM; replace if blown and retest.
Visually inspect CCM connector and harness; disconnect and inspect pins for corrosion or damage; clean and reseal as required.
With connector connected, measure supply voltage and ground continuity at CCM pins; repair any open/high resistance circuits.
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.
Perform continuity and short checks between CCM power, ground and CAN lines back to fuse/ground points; repair wiring faults.
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.
If all external checks pass, verify module software level and perform reflash/update per manufacturer service info; clear codes and retest.
If reprogramming unavailable or unsuccessful, consider module replacement. After repair, clear codes and road‑test to confirm issue is resolved.
Safety note: secure the vehicle, disable airbags or follow manufacturer procedures when working near restraint system modules or wiring.