Get the app
Quick access from your home screen.
AV-SCANNER / Service function guides / Body and comfort
This guide covers the complete diagnostic process for instrument cluster faults, from understanding how the cluster receives and displays data to performing systematic voltage, ground, and communication checks. It is written for working mechanics and experienced DIYers who need to trace dead gauges, blank displays, and false warnings without replacing parts blindly. You will learn how to isolate power, ground, network, and cluster-internal failures using a multimeter and scan tool, then verify the repair and prevent repeat faults. By the end, you will be able to diagnose most cluster faults to a specific circuit or module and document the result professionally.
Guidance is general and covers many makes. Exact procedures and values vary by model, so confirm them in the factory service information for your vehicle.
Download all 12 sections as a branded PDF to use in the workshop.
Get the app
Quick access from your home screen.