U0192

Code

HYUNDAI U — Network/User

Lost Communication With Personal Computer

Brand: HYUNDAI

Type: U — Network/User

Views: UK: 16 EN: 26 RU: 22

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Open or shorted CAN/communication wiring between modules
Poor or corroded connector pins or grounding at the affected module
Blown fuse or loss of module supply/ignition power
Faulty or unpowered personal computer (infotainment/telematics) module
CAN bus termination fault or short to battery/ground
Intermittent harness damage (chafing, water ingress)

Symptoms

Infotainment/telematics functions inoperative or intermittent
Inability to communicate with the affected module using a scan tool
Related convenience features may not work (phone, navigation, ACS, etc.)
Other modules report communication faults or related U‑codes
Possible dash warnings about modules or CAN bus

What to check

Connect an OBD-II scan tool and read freeze frame and live DTCs; confirm U0192 is current vs historic
Attempt to communicate directly with the named personal computer module via scan tool
Check battery voltage (key on) and main power/ignition fuses for the module
Visually inspect module connectors and wiring for corrosion, damage, or water intrusion
Check chassis and module grounds for tightness and corrosion
Verify communication on the bus using a scope/multimeter: CAN H/CAN L voltages and integrity

Signal parameters

CAN bus idle voltages (key ON, engine OFF): CAN_H ≈ 2.5 V, CAN_L ≈ 2.5 V
CAN dominant state typical voltages: CAN_H ≈ 3.5 V, CAN_L ≈ 1.5 V when active
Termination resistance: approximately 60 Ω measured between CAN_H and CAN_L (two 120 Ω in parallel)
Common bus data rates: 125 kbps / 250 kbps / 500 kbps (verify vehicle-specific bus speed)
Expected behavior: regular message traffic present on bus when system active (use a scope/logic analyzer)

Diagnostic algorithm

Verify DTC: read and record U0192 and any related U‑codes or freeze frame data.
Attempt communication: use a scan tool to query the targeted personal computer module; note if tool can’t connect while other modules are reachable.
Power and fuses: check battery voltage and fuses/power feeds to the module; restore any blown fuses and retest communications.
Visual inspection: remove module connector and inspect pins for corrosion, bent pins, or pushed-out terminals; inspect harness for damage or water entry.
Ground check: measure resistance from module ground to chassis; clean/tighten ground as needed.
Bus integrity: with key ON (engine OFF) measure CAN_H and CAN_L at the module connector — compare to expected idle voltages; look for short to battery/ground.
Termination and continuity: measure resistance between CAN_H and CAN_L (≈60 Ω) and check continuity from module to main harness and to other nodes.
Wiggle/replicate: with scope or scan tool monitoring, gently manipulate harness/connectors to try to reproduce fault (intermittent failures).
Isolate module: if wiring and power are good but no communication, try swapping with known-good module only if permitted and documented for vehicle (or bench test module per service manual).
Software: check for available module calibration/software updates or known technical service bulletins; reflash or update as directed.
Clear codes and road/test: after corrective actions, clear codes and verify the fault does not return under normal operation.

Likely causes

Loose/corroded connector or poor ground at the personal computer module
Open/short in CAN High or CAN Low wiring to the module
Blown fuse or lost power/ignition feed to the module
Failed personal computer (module not responding to bus traffic)

Fault status

⚠️ Status

Lost communication with Personal Computer module on vehicle network (CAN bus).

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-3.0 hours

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