MJLJ V4 Operation Guide - Revision history

Brentp: /* Serial Cable */

2022-03-31T14:49:54Z

Serial Cable

← Older revision		Revision as of 14:49, 31 March 2022
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	==Connecting to the MJLJ==		==Connecting to the MJLJ==

	===Serial Cable===		===Serial Cable (for older non-USB Megajolt systems)===
	The Megajolt Lite Jr uses an RJ11 jack for serial communications, located on the opposite side of the case from the molex connector.		The Megajolt Lite Jr uses an RJ11 jack for serial communications, located on the opposite side of the case from the molex connector.

Brentp: /* Serial Cable */

2018-08-15T20:15:46Z

Serial Cable

← Older revision		Revision as of 20:15, 15 August 2018
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	The Megajolt Lite Jr uses an RJ11 jack for serial communications, located on the opposite side of the case from the molex connector.		The Megajolt Lite Jr uses an RJ11 jack for serial communications, located on the opposite side of the case from the molex connector.

	You may construct a cable by modifying a 4 conductor modular phone cable per the wiring diagram~~, or you may use [http~~:~~//www.autosportlabs.com/rj11-serial-tuning-cable-mjlj-p-43.html cable + adapter] available through our online store.~~		You may construct a cable by modifying a 4 conductor modular phone cable per the wiring diagram:

	<center>		<center>

Brentp: /* How Megajolt determines ignition advance */

2017-01-29T19:13:48Z

How Megajolt determines ignition advance

← Older revision		Revision as of 19:13, 29 January 2017
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	====How Megajolt determines ignition advance====		====How Megajolt determines ignition advance====

	First, Megajolt selects the appropriate RPM and Load bin for the current operating conditions. The ignition advance is selected from the table.		* First, Megajolt selects the appropriate RPM and Load bin for the current operating conditions. The ignition advance is selected from the table.
			* Then, linear Interpolation smoothing is applied to the Correction value: Should the measured Auxiliary Input value fall between Bins, an intermediate value is calculated from the values specified in the adjacent Bins.
	~~Linear~~ Interpolation smoothing is applied to the Correction value: Should the measured Auxiliary Input value fall between Bins, an intermediate value is calculated from the values specified in the adjacent Bins. ~~This effect~~ is ~~illustrated in~~ the ~~screen shot~~.		* If the current RPM or Load value falls outside of the map, the advance value is simply railed to value at the respective extents of the map.
			* After the advance value is selected, the selected Correction value is applied to the Ignition Advance derived from the main Ignition Map. After correction, the overall ignition advance is limited to 0-59 Degrees Before Top Dead Center (BTDC).
	After the advance value is selected, the selected Correction value is applied to the Ignition Advance derived from the main Ignition Map. After correction, the overall ignition advance is limited to 0-59 Degrees Before Top Dead Center (BTDC).

	====Rev Limit Setting====		====Rev Limit Setting====

Brentp: /* Operation */ clarified how ignition advance is calculated

2017-01-29T18:34:10Z

Operation: clarified how ignition advance is calculated

← Older revision		Revision as of 18:34, 29 January 2017
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	*'''Peak Hold:''' Hold the advance correction for X ignition events after a peak value is detected on the Auxiliary Input channel. After the Peak Hold decays, the Advance correction drops down to the correction value for the current Auxiliary Input value. A value of zero disables this feature.		*'''Peak Hold:''' Hold the advance correction for X ignition events after a peak value is detected on the Auxiliary Input channel. After the Peak Hold decays, the Advance correction drops down to the correction value for the current Auxiliary Input value. A value of zero disables this feature.

	====~~Operation~~====		====How Megajolt determines ignition advance====
	~~During operation~~, the ~~selected Correction value is applied to the Ignition Advance derived from~~ the ~~main Ignition Map~~. ~~After correction, the overall~~ ignition advance is ~~limited to 0-59 Degrees Before Top Dead Center (BTDC)~~.
			First, Megajolt selects the appropriate RPM and Load bin for the current operating conditions. The ignition advance is selected from the table.

	Linear Interpolation smoothing is applied to the Correction value: Should the measured Auxiliary Input value fall between Bins, an intermediate value is calculated from the values specified in the adjacent Bins. This effect is illustrated in the screen shot.		Linear Interpolation smoothing is applied to the Correction value: Should the measured Auxiliary Input value fall between Bins, an intermediate value is calculated from the values specified in the adjacent Bins. This effect is illustrated in the screen shot.

			After the advance value is selected, the selected Correction value is applied to the Ignition Advance derived from the main Ignition Map. After correction, the overall ignition advance is limited to 0-59 Degrees Before Top Dead Center (BTDC).

			====Rev Limit Setting====
			The rev limit operates independent of the ignition map - when the configured hard rev limit is reached, the hard rev limit output activated, with the automatic soft limit activated 100 RPMs prior to the hard rev limit, setting the ignition advance to 0 degrees.

	===User Output Configuration===		===User Output Configuration===

Brentp at 19:24, 22 September 2016

2016-09-22T19:24:12Z

← Older revision		Revision as of 19:24, 22 September 2016
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	When mapping a sensor or other input, it is usually more efficient to map the values in a spreadsheet or other editing program and import them into the controller. You can load and save the Load axis calibration data using the 'Load Calibration' / 'Save Calibration' buttons. For importing, the file must be in plain text format of 256 values, with the file's line number representing the ADC voltage (line 0 = 0v; line 255=5.0v; linear scale).		When mapping a sensor or other input, it is usually more efficient to map the values in a spreadsheet or other editing program and import them into the controller. You can load and save the Load axis calibration data using the 'Load Calibration' / 'Save Calibration' buttons. For importing, the file must be in plain text format of 256 values, with the file's line number representing the ADC voltage (line 0 = 0v; line 255=5.0v; linear scale).

			====GM sensor Calibration File====

	~~=====GM sensor Calibration File=====~~		Calibration file for the GM coolant or IAT sensor: [[:file:GM_megajolt_temperatue_sensor_calibration.zip\|Download]]

	Calibration file for the GM coolant or IAT sensor:

	[[file:GM_megajolt_temperatue_sensor_calibration.zip\|Download]]

	===Dual Switchable Ignition Configurations===		===Dual Switchable Ignition Configurations===

Brentp: /* GM sensor Calibration File */

2016-09-22T19:20:46Z

GM sensor Calibration File

← Older revision		Revision as of 19:20, 22 September 2016
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	====GM sensor Calibration File====		=====GM sensor Calibration File=====

	Calibration file for the GM coolant or IAT sensor:		Calibration file for the GM coolant or IAT sensor:

Brentp: /* Auxiliary Input Channel Calibration */

2016-09-22T19:20:18Z

Auxiliary Input Channel Calibration

← Older revision		Revision as of 19:20, 22 September 2016
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	=====Load / Save calibration=====		=====Load / Save calibration=====
	When mapping a sensor or other input, it is usually more efficient to map the values in a spreadsheet or other editing program and import them into the controller. You can load and save the Load axis calibration data using the 'Load Calibration' / 'Save Calibration' buttons. For importing, the file must be in plain text format of 256 values, with the file's line number representing the ADC voltage (line 0 = 0v; line 255=5.0v; linear scale).		When mapping a sensor or other input, it is usually more efficient to map the values in a spreadsheet or other editing program and import them into the controller. You can load and save the Load axis calibration data using the 'Load Calibration' / 'Save Calibration' buttons. For importing, the file must be in plain text format of 256 values, with the file's line number representing the ADC voltage (line 0 = 0v; line 255=5.0v; linear scale).


			====GM sensor Calibration File====

			Calibration file for the GM coolant or IAT sensor:

			[[file:GM_megajolt_temperatue_sensor_calibration.zip\|Download]]

	===Dual Switchable Ignition Configurations===		===Dual Switchable Ignition Configurations===

Brentp at 15:45, 15 March 2016

2016-03-15T15:45:29Z

← Older revision		Revision as of 15:45, 15 March 2016
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	===Cranking Advance===		===Cranking Advance===
	Specify the Ignition advance used during cranking. The controller will use this value when the engine RPM is between 500 and approximately 200 RPM.		Specify the Ignition advance used during cranking. The controller will use this value when the engine RPM is between 500 and approximately 200 RPM.
			* '''Note''': Below 200 RPM, the EDIS module will fire the plugs at 5 to 10 degrees BTDC, regardless of Megajolt cranking advance setting.

	===Trigger Offset===		===Trigger Offset===

Brentp: /* Cranking Advance */

2016-03-11T17:22:37Z

Cranking Advance

← Older revision		Revision as of 17:22, 11 March 2016
Line 108:		Line 108:

	===Cranking Advance===		===Cranking Advance===
	Specify the Ignition advance used during cranking. The controller will use this value when the engine RPM ~~drops below~~ approximately 200 ~~RPMs~~.		Specify the Ignition advance used during cranking. The controller will use this value when the engine RPM is between 500 and approximately 200 RPM.

	===Trigger Offset===		===Trigger Offset===

Brentp: /* Cranking Advance */

2016-03-11T17:21:23Z

Cranking Advance

← Older revision		Revision as of 17:21, 11 March 2016
Line 108:		Line 108:

	===Cranking Advance===		===Cranking Advance===
	Specify the Ignition advance used during cranking. The controller will use this value when the engine RPM drops below approximately ~~500~~ RPMs.		Specify the Ignition advance used during cranking. The controller will use this value when the engine RPM drops below approximately 200 RPMs.

	===Trigger Offset===		===Trigger Offset===