VINTrucks
Heavy Truck ECU (Black Box) Information

FAQs

FAQs

Q. What does Cummins AT AV AU sample error mean?

A. Cummins ISX 07 engines with ECM codes that start with "AT", "AV", or "AU" are reporting (1 Hz) at the 5 Hz sampling interval in the Sudden Deceleration Records. This means that even thought the Sudden Deceleration Record says the readings are 1 second apart, they are actually 0.2 seconds apart. An easy way to check for this is to see where the Sudden Decel was set (i.e. no 9 mph/s change near 0 time), and the calculated deceleration for an emergency brake application won't make sense. This includes PACCAR PX engines.




At 1 Hz, this works out to a deceleration of 0.09g from -1 to 0.
At 5 Hz, this works out to a deceleration of 0.46g from -5 to 0.
Web Hosting Companies