The voltage shown at a bench power supply may differ from the voltage reaching a module through its leads. That difference can grow during a start-up current demand.

What to check next

Measure at the intended load point using an appropriate setup and compare it with the supply indication during the same event. Review lead and connection suitability. Where supported, remote sensing is an instrument feature for addressing this issue, but it must be configured according to the supply instructions.

Useful information for an enquiry

Include the supply model, lead arrangement and voltage at the module during start-up.

Do not simply increase the output voltage to compensate. The module limits and protected test arrangement must be respected.

Speak to AXION

For ECU testing and component-level repair, send your vehicle details and fault report. Workshop assessment is in Didcot, Oxfordshire. Suitable postal or remote work is confirmed before booking.

Technical background from Keysight. The referenced design explains the principle; the vehicle-specific procedure determines the repair.