B280800

Code

HYUNDAI B — Body

Timeout Multimedia CAN Message (CCP)

Brand: HYUNDAI

Type: B — Body

Views: UK: 17 EN: 19 RU: 12

AI status

Completed

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Page language: EN

Faulty multimedia/head unit ECU (no transmit)
Open, short or high-resistance wiring in CAN High/Low between multimedia unit and bus
Damaged or corroded connectors or pins at multimedia harness or gateway
CAN transceiver failure in multimedia ECU or gateway module
Missing or incorrect termination resistors, bus wiring topology changed by previous repair or aftermarket device
Module in sleep mode, software/firmware bug or configuration mismatch

Multimedia/navigation screen blank or intermittent
Audio, phone, or infotainment features inoperative or intermittent
Controls on dash or steering wheel for multimedia not functioning
Other modules report communication errors or related CAN timeout DTCs
Possible vehicle features tied to multimedia (climate display, rear camera) not available
Stored DTCs and possible warning messages on the instrument cluster

Scan for additional DTCs in multimedia, gateway, BCM and related modules
Confirm freeze frame and time stamp for when timeout occurred
Inspect multimedia connector and harness for damage, corrosion, bent pins or water intrusion
Check battery voltage and power/ground integrity at multimedia ECU
Use a scan tool to monitor CAN message traffic for CCP/multimedia message ID and frequency
Measure CAN_H/CAN_L with oscilloscope for proper voltages, differential waveform and noise

Expected message: multimedia/CCP CAN message ID (manufacturer-specific) — should be periodic
Typical message period: often 100–1000 ms depending on message type (verify with manufacturer data)
Timeout threshold: message absent for >1–2 seconds (manufacturer-specific)
CAN bus idle voltages: CAN_H ≈ 2.5 V, CAN_L ≈ 2.5 V (recessive); dominant state differential ≈ 1.5–2.0 V
Termination resistance: ≈ 60 ohms across CAN_H and CAN_L (two 120 Ω in parallel)
Bus message frequency/load: verify no excessive collisions or bus-off events

Retrieve and record all related DTCs and freeze frame data from all modules. Note repeatability.
Visually inspect multimedia unit connectors, harness route, and connectors for damage, water, corrosion or pin issues. Repair any faults.
Verify battery voltage and good ground/power to the multimedia ECU (key on). Repair poor power/ground.
Use a scan tool to monitor the CAN bus: look for the specific CCP/multimedia message. Note message ID, period, and when it stops.
If message is absent or intermittent, probe CAN_H and CAN_L with an oscilloscope at the multimedia harness while operating to observe waveform integrity, dominant/recessive levels and noise.
Check termination resistance across CAN_H and CAN_L with key off (~60 Ω). If incorrect, trace to missing/changed terminators or wiring alterations.
Disconnect multimedia unit and see if other CAN traffic returns to normal or other modules stop reporting errors (helps isolate bus segment).
Inspect for aftermarket devices or recently repaired wiring that could have introduced problems; remove/replace as necessary.
If wiring and bus appear good but unit does not transmit, attempt reprogramming or update multimedia ECU software per manufacturer TSBs. If unsuccessful, bench-test or replace multimedia ECU.
After repair, clear codes and perform a drive cycle or reproduce conditions to confirm the DTC does not return.

⚠️ Status

Multimedia CAN message timeout — multimedia module CCP messages not detected on CAN bus. Communication lost or interrupted.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.5-3.0 hours

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