C162887

Code

HYUNDAI C — Chassis

CAN Time-out Cluster

Brand: HYUNDAI

Type: C — Chassis

Views: UK: 21 EN: 15 RU: 12

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Page language: EN

Open or shorted CAN-H or CAN-L wiring
Poor connector contacts or corrosion at cluster harness
Blown fuse or poor power/ground to the cluster
Faulty instrument cluster CAN transceiver/module
Another module on the bus pulling the CAN lines dominant (short to power/ground) or bus loading
Missing or incorrect bus termination (open/misaligned 120 Ω resistors)

Instrument cluster blank, frozen gauges or erratic needle/jump behavior
Multiple dash warning lights illuminated or not illuminating correctly
No CAN data from cluster when using a diagnostic scan tool
Other modules reporting communication-related DTCs
Intermittent or permanent loss of features controlled by the cluster (lights, chimes, indicators)

Check battery voltage (with engine off and key on) and verify stable vehicle power 12V supply
Scan the network: read and record all DTCs from cluster and other modules
Visually inspect cluster connector(s) and wiring for corrosion, damage or bent pins
Check fuses and relays related to cluster and CAN power/ignition circuits
Backprobe CAN H and CAN L at the cluster connector; measure idle voltages with key ON
Measure resistance between CAN H and CAN L (expected ~60 Ω with ignition off)

CAN H idle voltage ~2.5 V (recessive) relative to ground
CAN L idle voltage ~2.5 V (recessive) relative to ground
Dominant state: CAN H ≈ 3.5 V, CAN L ≈ 1.5 V (differential ~2.0 V)
Resistance across CAN H and CAN L ≈ 60 Ω (two 120 Ω terminators in parallel)
Expected bus activity: regular message frames from BCM/ECM/ABS/other ECUs — interval depends on network but often every 10–200 ms per node

Verify vehicle battery condition and check cluster power and ground circuits; repair any low-voltage or open ground issues.
Use a scan tool to read and document all stored and pending DTCs and attempt to communicate with the cluster; note other modules reporting communication faults.
Visually inspect and secure connectors at the cluster, junction block, BCM and any CAN junctions. Repair damaged pins/wiring as needed.
Backprobe cluster CAN H and CAN L with ignition ON. Confirm idle voltages (~2.5 V) and look for message activity with a scan tool or scope.
Measure resistance between CAN H and CAN L with ignition off; verify ~60 Ω. If open or low, isolate section of bus by disconnecting modules to find the faulted segment.
Use an oscilloscope or CAN bus analyzer to check waveform integrity and identify noise, stuck-dominant line, or missing transmitters.
If a module is identified as the source (e.g., shorted or transmitting malformed frames), disconnect it and re-check the bus. Replace or repair the faulty module/harness.
If wiring and other modules check good, consider bench-testing or replacing the instrument cluster or reflashing cluster software per manufacturer procedures.
After repair, clear DTCs and verify normal CAN traffic and cluster operation across multiple ignition cycles and driving conditions.

⚠️ Status

CAN Time-out (Cluster): instrument cluster has not received expected CAN messages within timeout period.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-3.0 hours

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