· About: It is a set of critical parameters captured and stored by an individual ECU along with a DTC on the occurrence of specific criteria. · Freeze Frame Data is taken at the moment but snapshot is like a Video. · Purpose: These parameters can help technician to understand possible root cause of DTC occurred and the condition in which DTC has occurred. · Storage Location: RAM and NVRAM · Vehicle manufacturer is responsible for defining: o Count : Number of Snapshot Records to store for a DTC (single or multiple) o Occurrence Criteria: When shall we store a Snapshot record · Content of Snapshot Data : o Every ECU can have different set of parameters which can be part of its Snapshot Data. o Vehicle Level P...
This blog will educate new enthusiast about an interesting field of Automotive Diagnostics.