B281000

Code

HYUNDAI B — Body

CAN Time-Out AVM/PGS | Timeout Multimedia CAN Message(PGS/AVM/FRMS)

Brand: HYUNDAI

Type: B — Body

Views: UK: 10 EN: 16 RU: 15

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Open, short or intermittent fault in CAN_H / CAN_L wiring between multimedia/AVM/PGS module and gateway/body ECU
Loose, corroded or disconnected connector at the multimedia/AVM/PGS or gateway module
Failed multimedia/AVM/PGS module (no transmission)
Gateway or BCM software/firmware fault or configuration mismatch
Power or ground fault to the sending module (AVM/PGS/FRMS)
CAN bus termination fault or improper network impedance

Symptoms

AVM / Around View Monitor or Parking Guidance features disabled or not available
Multimedia display shows "AVM/PGS error" or similar message
Camera or parking guidance icons not displayed or intermittent
Related warning or message on instrument cluster or infotainment
No apparent effect on engine drivability (communication/network fault only)

What to check

Read all stored DTCs and freeze-frame data from all modules (infotainment, BCM/gateway, cameras)
Verify vehicle battery charge and key-on voltages are within spec
Visually inspect CAN connectors and harnesses for damage, corrosion, or loose pins
Check fuses and power/ground circuits for the multimedia/AVM/PGS modules
Measure CAN bus idle voltages (CAN_H and CAN_L) and check for proper differential and termination resistance (~60 ohms across H/L when key off, consult factory spec)
Use a scan tool or CAN bus analyzer to verify presence and frequency of expected AVM/PGS messages

Signal parameters

CAN_H idle voltage typically ~2.5–3.5 V (model dependent) — confirm with factory spec
CAN_L idle voltage typically ~1.5–2.5 V (model dependent)
Differential idle voltage (CAN_H − CAN_L) ~0 V when recessive, ~2 V when dominant (use oscilloscope/logic analyzer)
Bus termination resistance ≈ 60 Ω between CAN_H and CAN_L (two 120 Ω terminators in parallel) — verify with multimeter when powered off
Expected periodic message ID(s) and frequency for AVM/PGS/FRMS (verify with OEM data using a capable scan tool or bus sniffer)

Diagnostic algorithm

Retrieve all related DTCs from gateway, infotainment, camera modules and record freeze-frame data.
Confirm vehicle electrical health: battery voltage, fuses and module power/ground circuits feeding AVM/PGS/FRMS and gateway.
Visually inspect wiring and connectors for damage, corrosion or loose pins at multimedia module, cameras, trunk/hatch areas and gateway; repair as needed.
With a lab-quality scan tool, verify whether the AVM/PGS/FRMS module appears on the CAN network and whether it transmits periodic messages. Note missing message IDs and frequencies.
Measure CAN_H and CAN_L voltages and check termination resistance. If voltages or termination are out of range, isolate and repair the wiring or replace terminators.
Use an oscilloscope or CAN analyzer to look for bus errors, dominant/recessive patterns, or bus flooding by other nodes. If another node is corrupting the bus, isolate by disconnecting suspected modules one at a time.
If wiring and bus integrity are good but the module does not transmit, perform bench or module-level diagnostics: check for proper supply and ground at the module, then update/reflash or replace the module per OEM procedure.
After repairs, clear codes and perform a full functional test and road/test to ensure the message is present and no timeouts return.

Likely causes

Pin corrosion or bent pins at the multimedia module connector
Broken or chafed CAN wiring in harness (common at door sills, trunk, or rear bumper)
Multimedia/AVM module lost power due to blown fuse or bad ignition feed
Gateway/BCM not receiving or not forwarding messages due to software/firmware issue
Intermittent ground at module causing transmitter to stop periodically

Fault status

⚠️ Status

Multimedia CAN message timeout (AVM/PGS/FRMS): expected periodic CAN message(s) not received within timeout window. Stored when communication from the AVM/PGS/FRMS sender is absent or interrupted.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-2.5 hours

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