Evaluation of 2006 Mercury PCM CSV Data
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Ishotfirst444
- Posts: 1
- Joined: Fri Jul 05, 2024 12:42 pm
- First Name: Rob
- Last Name: Clements
Evaluation of 2006 Mercury PCM CSV Data
I recently downloaded a 2006 Mercury Grand Marquis which found a saved event. However, the PCM data was a flat lined on the graph. A note indicated that the Restraint Deployment Signal was not received, and that analyst evaluation of PCM CSV data would be needed. How would I go about doing this?
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Bob Anderson
- Posts: 206
- Joined: Fri May 27, 2011 8:13 am
- First Name: Bob
- Last Name: Anderson
- Location: Tempe, AZ
- Contact:
Re: Evaluation of 2006 Mercury PCM CSV Data
Good Morning,
When the Powertrain Control Module (PCM) is powered up, the PCM data is constantly being refreshed or over-written by new data in a circular buffer.
During a crash where the Restraint Deployment Signal (RDS) is successfully received by the PCM, it holds or locks the data in that circular buffer.
However, for the case that the RDS is not received, a F-00K-108-221 PCM adapter must be properly used during the download process to prevent over-writing of crash related data when the PCM is powered for the download. This is because the PCM will continue to over-write older data when it is powered.
As a practical matter, if the RDS is not successfully received, you will only get crash related PCM data if the vehicle lost power as a result of the crash or if the driver turns the ignition off in a very short period of time after the crash (and the vehicle or module is not ever powered up again before your download).
If the vehicle is repaired and returned to service, even when an RDS has been received, the PCM will eventually return to normal function and begin over-writing data again. So, once again, you will not get crash related PCM data.
What the analyst evaluation of the data refers to is the situation where power is cut to the module in time for crash related data to have been stored and later successfully retrieved. Without an RDS, there is not a signal or flag to indicate where in the circular data buffer the crash occurred so that the data can be displayed in the proper order from oldest to newest. The analyst evaluation is to determine the location in the data that represents when the crash occurred so that the data can be visualized in the proper order.
When the Powertrain Control Module (PCM) is powered up, the PCM data is constantly being refreshed or over-written by new data in a circular buffer.
During a crash where the Restraint Deployment Signal (RDS) is successfully received by the PCM, it holds or locks the data in that circular buffer.
However, for the case that the RDS is not received, a F-00K-108-221 PCM adapter must be properly used during the download process to prevent over-writing of crash related data when the PCM is powered for the download. This is because the PCM will continue to over-write older data when it is powered.
As a practical matter, if the RDS is not successfully received, you will only get crash related PCM data if the vehicle lost power as a result of the crash or if the driver turns the ignition off in a very short period of time after the crash (and the vehicle or module is not ever powered up again before your download).
If the vehicle is repaired and returned to service, even when an RDS has been received, the PCM will eventually return to normal function and begin over-writing data again. So, once again, you will not get crash related PCM data.
What the analyst evaluation of the data refers to is the situation where power is cut to the module in time for crash related data to have been stored and later successfully retrieved. Without an RDS, there is not a signal or flag to indicate where in the circular data buffer the crash occurred so that the data can be displayed in the proper order from oldest to newest. The analyst evaluation is to determine the location in the data that represents when the crash occurred so that the data can be visualized in the proper order.
Bob Anderson
Tempe, Arizona
Tempe, Arizona
