• EFILive OBDII Scan and Tune.
• EFILive OBDI Scan Only.

The EFILive Scan Tool can log data in any of three ways:

• Generic: which has a limit of 96 channels.
• Dynamic: which has a limit of 36 channels.
• Stream: which has a limit of 24 channels.

Depending on the number of parameters selected, EFILive will automatically select the best logging method. Most PIDs require only one channel, some require two.

All Speeds are given in complete frames per second.

General and dynamic scan mode speeds can be greatly improved by prioritizing PIDs so that slow changing PIDs are scanned at a lower rate than fast changing PIDs. The stream scan mode is a fixed speed no matter how many channels (up to 24) are selected.

* Full speed may not be achievable on all laptop, interface cable and PCM combinations.

By default, invalid (unsupported) PIDs are hidden from view. Uncheck the Supported check box on the [PIDs (F8)] tab page of the Scan Tool to show ALL PIDs regardless of their status.

When EFILive is not connected to any vehicle, each PID’s validity is determined as if EFILive was connected to the vehicle from the most recently loaded log file. If you are viewing a log file of a vehicle that has never been connected to your PC, then EFILive will not know which PIDs are valid and which are not. In that case EFILive only identifies the PIDs from the log file as being valid.

To restore the valid PIDs for any particular vehicle, please enter that vehicle’s VIN, operating system number and transmission type using the menu option: File->Enter VIN (or load a log file recorded from that vehicle).

Calculated PIDs may sometimes be invalid due to incomplete dependencies, right click on the calculated PID and select “More info...” to see the required dependencies and/or other reasons why the calculated PID is not invalid. Calculated PIDs can be identified by the CALC prefix.

Black-box logging is the ability to log data and collect trouble codes without requiring a laptop. EFILive FlashScan has enough flash memory built in to log up to 23 minutes of high-speed data and trouble codes.

DMA is an acronym meaning Direct Memory Access. It refers to special PIDs created by EFILive that obtain their value directly from the PCM’s operating memory. As tuners began tuning vehicles using EFILive, they began asking for more information than was available via generic and manufacturer enhanced PIDs. EFILive pioneered the use of DMA PIDs to extract critical runtime data from the PCM that would be otherwise unavailable. DMA PIDs can be identified by their _DMA suffix.

Any wideband O2 controller that outputs AFR as an analog voltage (between 0 and 5 volts) can easily be integrated into EFILive’s FlashScan Scan Tool.

• If a MAF sensor is fitted use {SAE.MAF} to log grams/second and {CALC.CYLAIR} or {GM.DYNCYLAIR} to log grams/cylinder.
• If no MAF sensor is fitted use {GM.DYNAIR} to log estimated grams of air per second and {GM.DYNCYLAIR} to log grams/cylinder.

There may be a discrepancy between {CALC.CYLAIR} and {GM.DYNCYLAIR} due to the method used to calculate the values. {CALC.CYLAIR} is calculated from the MAF and RPM signals, {GM.DYNCYLAIR} is calculated from the MAP and RPM signals.

Select the two injector pulse width PIDs:

• {GM.IBPW1}
• {GM.IBPW2}

And the two calculated injector duty cycle PIDs:

• {CALC.INJDC1}
• {CALC.INJDC2}

These four PIDs should already be selected by default when you start the EFILive Scan Tool, if not, the easiest way to select them is to load the Default Metric or Default Imperial *.pid file. Click on the "Open PID selection file" icon in the mini-toolbar (it only has 4 buttons) in the [PIDs (F8)] tab page.

The injector duty cycle is a calculated PID and may display values greater than 100%. Values greater than 100% are "imaginary" duty cycles, the physical duty cycle of the injectors cannot be greater than 100%.

When the calculated duty cycle is greater than 100%, the PCM is attempting to open the injectors for the next squirt of fuel before it has closed the injectors from the previous squirt. Physically that is not possible.

Values above 100% are theoretical indications of how far out your injectors really are.

EFILive calculates duty cycle for banks 1 and 2, using the following formulas:

• {GM.IBPW1}*{SAE.RPM}/1200
• {GM.IBPW2}*{SAE.RPM}/1200

Technically speaking, the duty cycle is the percentage of time that the PCM is commanding the injectors open per 2 engine revolutions (4 stroke engine = 2 rpm per cycle).

• At 50% duty cycle the PCM is commanding the injectors open for 1 revolution every 2 revolutions.
• At 80% duty cycle the PCM is commanding the injectors open for 1.6 revolutions every 2 revolutions.
• At 100% duty cycle the PCM is commanding the injectors open for 2 revolutions every 2 revolutions.
• At 120% duty cycle the PCM is trying to command the injectors open for 2.4 revolutions every 2 revolutions - which is not physically possible.

The F-Body PCM does not provide an oil pressure PID value. The PCM software reports that the oil pressure PID is supported, however the PCM does not provide oil pressure data for that PID. The oil pressure is sent directly to the instrument gauge.

The oil pressure PID has been removed from EFILive V6 for F body applications.

The Y body oil pressure PID is supported and does report oil pressure.

The GM-H Commodore oil pressure PID is supported and does report oil pressure.

Select the menu option "Edit->Log file information" or press the hotkey Ctrl-I.

Don't forget to save the log file after adding a comment to it.

No.

EFILive V4 communicates with OBDI PCMs using GM's ALDL protocol. That protocol is very similar to the standard serial protocol as used by your PC. The main difference is the baud rate used by GM's PCMs is set at 8192 bps (bit per second).

Most desktop PC's (and some laptops) are fitted with a UART (Universal Asynchronous Receiver and Transmitter) that can be programmed to support almost any baud rate. EFILive programs the UART in the PC to 8200 baud rate which is close enough to 8192 to operate within specified tolerances.

USB to serial converters only support the standard baud rates of: 9600, 19200, 38400, 57600, 115200 and 230400 bps. Neither 9600 nor 19200 are close enough to 8192 bps to correctly support GM's ALDL protocol.

If you can find a USB to serial converter that does work with EFILive, please let us know so we can share that information with other customers.