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Home / DTC / C1613 — CAN Transmission Unmatch | Vehicle signal(VSS) time out | CAN Wrong Message | CAN signal error EMS (Check EMS) | CAN signal error ECM (Check ECM) | CAN Signal Error EMS | CAN signal error EMS | ECM-Failure

C1613 — CAN Transmission Unmatch | Vehicle signal(VSS) time out | CAN Wrong Message | CAN signal error EMS (Check EMS) | CAN signal error ECM (Check ECM) | CAN Signal Error EMS | CAN signal error EMS | ECM-Failure

Detailed page for trouble code C1613.

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C1613

HYUNDAI C — Chassis

CAN Transmission Unmatch | Vehicle signal(VSS) time out | CAN Wrong Message | CAN signal error EMS (Check EMS) | CAN signal error ECM (Check ECM) | CAN Signal Error EMS | CAN signal error EMS | ECM-Failure

Brand: HYUNDAI
Type: C — Chassis
AI status
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Page language: EN

Causes

  • Faulty VSS (vehicle speed sensor) or speed sensor wiring
  • Intermittent or open/shorted CAN bus wiring or damaged connectors
  • Loose, corroded or poor battery/ground connections affecting ECU/TCM power
  • Malfunctioning ECM, EMS, TCM or ABS module transmitting incorrect or no messages
  • Module programming or configuration mismatch after repair or replacement
  • Damaged or chafed wiring harness where it routes near moving parts or heat sources

Symptoms

  • MIL/Warning lamp illuminated and C1613 stored
  • Incorrect or non‑working speedometer and/or odometer reading
  • Transmission shifting abnormalities or limp mode
  • Cruise control disabled
  • Intermittent loss of communication with ECM/TCM on scan tool
  • Multiple CAN‑related trouble codes present

What to check

  • Connect a capable scan tool, read all stored codes and freeze frame data; note related U/C codes
  • Clear codes, road test and attempt to reproduce; re‑scan for recurrence
  • Verify battery voltage and chassis/engine grounds are clean and tight
  • Visually inspect CAN wiring, connectors and harness for damage, corrosion, or pin push‑outs
  • Backprobe VSS at sensor and at ECM/TCM; compare waveform or frequency to expected with scope
  • Measure CAN bus voltages with multimeter and preferably oscilloscope (recessive ≈2.5V each, differential ≈0V; dominant CANH ≈3.5V/CANL ≈1.5V, differential ≈2V)

Signal parameters

  • CAN bus idle (recessive): CANH ≈2.5 V, CANL ≈2.5 V (each)
  • CAN bus dominant: CANH ≈3.5 V, CANL ≈1.5 V (differential ≈2 V)
  • Termination: ≈60 ohm between CANH and CANL (two 120Ω in parallel)
  • VSS type: square wave or open‑collector pulse (0–5V typical) — frequency proportional to vehicle speed
  • VSS continuity: expect low resistance to sensor reference; confirm expected pulses at known vehicle speed

Diagnostic algorithm

  1. Read all codes and freeze frame; save live data. Note any U‑codes or other C codes.
  2. Verify vehicle battery voltage ≥12.4V and inspect main grounds. Repair any poor grounds or low battery condition.
  3. Perform visual/wiggle inspection of CAN connectors and wiring from ECM, TCM, ABS, BCM and associated junctions. Repair obvious damage.
  4. With a scope, observe CANH/CANL signals at a module connector. Look for noise, missing messages, stuck dominant, or incorrect voltage levels.
  5. Backprobe VSS at the sensor and at the ECM/TCM while driving or using a wheel‑spin test. Confirm pulses are present and frequency matches vehicle speed. If absent or noisy, trace and repair VSS circuit.
  6. Measure resistance between CANH and CANL with ignition off (expect ≈60Ω). If out of range, isolate segments by disconnecting modules to locate a shorted/failed node.
  7. If a single module causes bus errors when connected, verify its power/ground and replace or reprogram per service manual. Use known‑good module swap only when confirmed by diagnosis.
  8. Check for and apply any manufacturer software updates or reflash instructions. After repairs, clear codes and verify the fault does not return on extended road test.
  9. If wiring and modules check good but intermittent persists, consider intermittent wiring harness repair or replacement and perform extended data/log capture.

Likely causes

  • Open/short on CAN High/Low wires or poor connector at a module
  • Intermittent VSS signal (open, short to ground, noisy signal)
  • Corroded ground or low battery voltage causing modules to drop off network
  • Faulty transmission control module (TCM) or ECM causing wrong or no CAN messages
  • Software/calibration mismatch after module replacement

Fault status

⚠️ Status
CAN communication mismatch/time‑out between transmission and engine control systems; VSS or CAN bus message error detected. Check CAN network integrity, VSS signal and module communication.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.5-3.5 hours
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Browse 371 HYUNDAI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

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