What is Freeze Frame data used for?

What is Freeze Frame data used for?

How can you use the freeze frame data? Depending on the data available, a freeze frame can tell you whether the engine was cold or warmed up or what was the temperature outside (Intake Air Temperature IAT). It can tell at what rpms the fault happened, at what speed and how much time passed since the engine was started.

What mode is Freeze Frame data?

The purpose of Mode $04 is to clear the emissions-related diagnostic information from the modules that have stored this information. This function includes clearing not only the DTCs; but also the freeze-frame data, all stored test data, and it resets all monitors and turns off the check engine light.

How do you read freeze frame data?

Another example of how to interpret freeze frame data

1. Fuel System 1 Status = 1.
2. Fuel System 2 Status = 1.
3. Fuel System 1 Status = 1.
4. Fuel System 2 Status = 1.
5. Calculated Load = 22. 16 %
6. Engine coolant temperature = 87 deg C.
7. Short term fuel trim (Bank 1) = 0%
8. Long term fuel trim (Bank 1) = +11.65%

What does no powertrain DTC or freeze frame data mean?

#4 · Apr 13, 2013. “No Powertrain DTC’s or Freeze Frame Data is presently stored in vehicles computer” No powertrain DTC – No diagnostic trouble codes – e.g. no problems. No freeze frame data – data which is stored when a problem is recognized. e.g. no problems – no data.

What does load PCT mean?

LOAD_PCT are: Reaches 1.0 at WOT at any altitude, temperature or rpm for. both naturally aspirated and boosted engines. Indicates percent of peak available torque. Linearly correlated with engine vacuum. Often used to schedule power enrichment.

What does DTC alert mean?

Diagnostic Trouble Code
A DTC, short for Diagnostic Trouble Code, is a code used to diagnose malfunctions in a vehicle or heavy equipment. While the malfunction indicator lamp (MIL)—also known as the check engine light—simply alerts drivers that there is an issue, a DTC identifies what and where the issue is.

What is load Pct%?

What should calculated load be at idle?

So, the baseline of our formula for calculated load at idle is 3.4 grams per second (current airflow) divided by 10.35 grams per second (max airflow) equals 33%. In the last column we saw that normal CL readings at idle could be between 30% and 50%.

How is engine load calculated?

LOAD_ABS = [air mass (g / intake stroke)] / [1.184 (g / intake stroke) * cylinder displacement in liters] Derivation: – air mass (g / intake stroke) = [total engine air mass (g/sec)] / [rpm (revs/min)* (1 min / 60 sec) * (1/2 # of cylinders (strokes / rev)] – LOAD_ABS = [air mass (g)/intake stroke] / [maximum air mass …

How to interpret and use OBD2 freeze frame data?

In summary, utilizing the OBD2 freeze frame data, you can properly interpret the information coming from your vehicle. You will need an appropriate scanner to get the data, but it is worth the effort and you can begin troubleshooting your vehicle.

What happens to freeze frame data when something goes wrong?

When something goes wrong, a vehicle’s onboard computer saves a freeze frame data snapshot of what was happening at the time of the incident. This data is crucial to understanding what went wrong and how to repair it. However, you must download and read this data from the computer to use it.

Can a freeze frame overwrite fuel trim data?

Made to identify emissions-related faults, freeze frame data could help you identify other problems as well. Only data associated with a misfire fault or fuel trim can overwrite the freeze frame data.

Is there a leak in the freeze frame?

The calculated load value is low, so the leak should be relatively easy to uncover. The freeze frame data by itself won’t be of much use without someone interpreting the data. As with all tools, its usefulness will be determined by how it is used.