Ignition Testing Tools: Difference between revisions

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The testing tools described in this section are available from the Setup and Testing screen (Pg. 401). Security access of Setup or Engineering is required.
The testing tools described in this section are available from the "Testing" button of the ignition home slide. Security access of Setup or Engineering is required for some screens.


===ENGINE RUNNING DIAGNOSTICS AND TESTING- ICM1===
==Input Information / Debugging ==
The Engine Running Diagnostics and Testing screen (Pg. 420) is used to view the current timing source configuration and identify if there are any issues present.
 
*“Inputs” – Displays the status of the configured input signals
(This page can also be reached from the home page button "Input Information")
*“Teeth” – Displays status of the flywheel teeth
 
*“Input Noise” – Displays the percentage of erroneous signals detected over the previous 10 seconds
This page shows the status of the ignition detecting the position of the engine and firing the coils.
*“Other Errors / Warnings” – Displays various issues detected
 
*“Min Flywheel rotations not yet reached” – The engine has not turned enough times yet to start sparking. User-settable in the engineering screen.
The first box shows the status of movement on the two inputs. When the engine is not turning this box is not colored. While turning it should turn green as both inputs show movement. If one does not show movement, check that sensor gap and wiring.
*“Engine overspeed shutdown” – The overspeed shutdown fault occurred and has not yet been cleared
 
*“Engine underspeed shutdown” – The underspeed shutdown fault occurred and has not yet been cleared
The second box shows the status of resolving the position. If it does not turn green but the first box does, the setup may be incorrect for the flywheel teeth or hall disc type. It could also mean the hall sensor is in too far or not far enough.
*“Bad configuration- check setup” – The configuration is invalid (e.g. a cylinder is used in the firing order twice)
 
*“Critical timing error shutdown” – The TDC signal was lost for 2 seconds while the flywheel was still running.
The third box shows the status of the coils firing. If it does not turn green but the first two boxes do, then there may be an issue with the coil harness or coil connections. Alternately it might mean the ignition is disabled (shutdown pin grounded), which would be seen in the status on the home screen of the ignition.
*“Hall signal weak” – The hall pulse has been intermittent but occurring at the correct location after missing one or more cam turns.
 
*“Previous Shutdown Cause” – Displays the reason for the previous ignition shutdown
===Previous Shutdown===
*"None/Reset (Engine has not gone from running to stopped since power on)" – The engine has not shutdown since the ignition has been powered on
At the bottom of the input information page the previous shutdown cause is shown. This can be useful for debugging an issue.
*"Generic stall (ignition was firing when engine died)" – Engine stalled while the ignition was firing
 
*"User disabled" – The ignition was killed by selecting the “Shutdown Engine” button from the “System Menu” screen
===Input Counts===
*"External disable (shutdown line was pulled low)" – Ignition is disabled from the annunciator
The input counts on each input can be used to help debug sensor issues. Typically only two of the three are used. A sensor can be waved across metal outside the engine and should add to these counts.
*"Critical alarm shutdown (e.g. overspeed/underspeed)" – An overspeed or underspeed event occurred
 
*"Critical timing fault- timing signals were too poor to continue firing" – The magnetic pickup or Hall sensor signal lost integrity
===Additional Debug===
*"Generic stall low RPM (ignition was firing when engine died)" - Engine stalled while the ignition was firing
This button will show a dialog showing noise levels and if any broken teeth are detected.
===ENGINE RUNNING DIAGNOSTICS AND TESTING- ICM2===
 
The ICM2 Engine Running Diagnostics and Testing screen (Pg. 422) is used to view the current timing source configuration and identify if there are any issues present.
==Engine off testing==
*“Encoder” shows encoder status
 
*“Counts per rev.” is a factory setting for the encoder
This page is used to test ignition component operation and wiring when the engine is off. In this mode you can enter Compression Testing Mode, and can run wiring and firing order tests.
*“Last rollover” shows what the last rollover for the encoder was, which should always match “Counts per rev”. If this number is slightly off, there could be an encoder or noise issue. If this number is above 60,000, then the encoder is running backwards, in which case the calibration step needs to be completed.
*“Encoder Turning” / “Encoder Index Moving”: These show the movement of the encoder, which should be “No” when the engine is off and “Yes” when the engine is moving. If these stay “No” with the engine cranking, then there could be an issue with the encoder, drive shaft, coupling (“biscuit”), or internal gearing slipping.
*“Sparks” shows the total number of sparks since power on, and total number of misfires.
*“Other errors and warnings” will show other faults, if present. This list is the same as in the ICM1 in the previous section.
*“Previous shutdown cause” shows the last reason the ignition stopped firing. The list is the same as in the ICM1 in the previous section.
===ENGINE OFF DIAGNOSTICS AND TESTING===
The Engine Off Diagnostics and Testing screen (Pg. 421) is used to test ignition component operation and wiring when the engine is off. In this mode you can enter Compression Testing Mode, and can run wiring and firing order tests.


The left box can be used to select an individual cylinder to test sparking to verify wiring. To test a cylinder, select ‘Test’ next to that cylinder. When testing is active, the ignition coil under test will fire continuously. To check the component health or activity, use a spark checker tool or observe the spark information on the right side of the screen. To end the test, select the “End Test” button.
The left box can be used to select an individual cylinder to test sparking to verify wiring. To test a cylinder, select ‘Test’ next to that cylinder. When testing is active, the ignition coil under test will fire continuously. To check the component health or activity, use a spark checker tool or observe the spark information on the right side of the screen. To end the test, select the “End Test” button.
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The ‘Compression Testing Mode’ button can be selected when there are no individual cylinder tests taking place. This locks out the ignition system so that the user can crank the engine for a compression test without the coils firing. Click ‘End Test’ to exit this mode.
The ‘Compression Testing Mode’ button can be selected when there are no individual cylinder tests taking place. This locks out the ignition system so that the user can crank the engine for a compression test without the coils firing. Click ‘End Test’ to exit this mode.


[[File:Engine Off Diagnostic.jpg]]  
==Spark Graphing Page==
This screen is used to graph spark waveforms while the engine is running.
 
To graph a spark waveform, select the cylinder to capture and press the “Capture Spark” button. Unhealthy sparks will be abnormally short/long or have intermittent jogs within the low duration of the spark.
 
[[File:SparkGraph.png|600px]]
 
==Spark Information Page==
See [[Ignition Cylinder Information]]


''Engine Off Diagnostics and Testing Screen''
==Single Cylinder Dropout Test==
===TIMING CALIBRATION AND TACHOMETER OUTPUT===
The Timing Calibration and Tachometer Output screen (Pg. 423) is used to adjust the ignition calibration value and the tachometer output.
===TDC Calibration===
“TDC Calibration” is used to adjust timing to match the actual timing observed through a timing light, if different. Timing disparity between the displayed timing of the ICM and a timing light are due to TDC index trigger bolt being installed not precisely at TDC. Note that the ‘Current Timing Displayed’ value will not change as the offset is adjusted, instead the value read on the timing light will change. Once the timing light matches the current timing, the signal is calibrated.


When doing an initial calibration of the engine, it can be useful to set RPM advance to be constant so that the timing does not move around while calibrating
See [[Ignition Single Cylinder Dropout Test]]


If the trigger was installed BTDC, the offset will be negative. If the trigger was installed ATDC, the offset will be positive.
==Debug Log==
===Tachometer Output===
This page pulls a logs of recent input events on the ICM. It might be requested by EMIT tech support to get a picture of this page. Select "Offload Data" to update with the latest information.
The “Tachometer Output” setting is used to set the number of pulses per revolution for the Tachometer Output pin on the ICM. This can be used to display RPMs on other devices, such as a Murphy TTD panel. Press the button to change the number of pulses on the tach output for every flywheel revolution.


If connecting the tachometer output to the MPU input of a TTD panel, the TTD must be configured to match the pulses per revolution set on this screen. The TTD only looks for RPM on the MPU input if the pulses are greater than 17. A value of 100, or more, is recommended.
==Timing disc test==
This page can be used to help determine the timing disc type. After cranking the engine several turns, select "Analyze data" and the system will give the result of the disc type if known.

Latest revision as of 19:40, 16 July 2024

The testing tools described in this section are available from the "Testing" button of the ignition home slide. Security access of Setup or Engineering is required for some screens.

Input Information / Debugging

(This page can also be reached from the home page button "Input Information")

This page shows the status of the ignition detecting the position of the engine and firing the coils.

The first box shows the status of movement on the two inputs. When the engine is not turning this box is not colored. While turning it should turn green as both inputs show movement. If one does not show movement, check that sensor gap and wiring.

The second box shows the status of resolving the position. If it does not turn green but the first box does, the setup may be incorrect for the flywheel teeth or hall disc type. It could also mean the hall sensor is in too far or not far enough.

The third box shows the status of the coils firing. If it does not turn green but the first two boxes do, then there may be an issue with the coil harness or coil connections. Alternately it might mean the ignition is disabled (shutdown pin grounded), which would be seen in the status on the home screen of the ignition.

Previous Shutdown

At the bottom of the input information page the previous shutdown cause is shown. This can be useful for debugging an issue.

Input Counts

The input counts on each input can be used to help debug sensor issues. Typically only two of the three are used. A sensor can be waved across metal outside the engine and should add to these counts.

Additional Debug

This button will show a dialog showing noise levels and if any broken teeth are detected.

Engine off testing

This page is used to test ignition component operation and wiring when the engine is off. In this mode you can enter Compression Testing Mode, and can run wiring and firing order tests.

The left box can be used to select an individual cylinder to test sparking to verify wiring. To test a cylinder, select ‘Test’ next to that cylinder. When testing is active, the ignition coil under test will fire continuously. To check the component health or activity, use a spark checker tool or observe the spark information on the right side of the screen. To end the test, select the “End Test” button.

The text labels for the cylinders will illuminate blue while under test. On the Ignition Home screen (Pg. 400), the status will display “Firing Order Test Mode”.

The ‘Compression Testing Mode’ button can be selected when there are no individual cylinder tests taking place. This locks out the ignition system so that the user can crank the engine for a compression test without the coils firing. Click ‘End Test’ to exit this mode.

Spark Graphing Page

This screen is used to graph spark waveforms while the engine is running.

To graph a spark waveform, select the cylinder to capture and press the “Capture Spark” button. Unhealthy sparks will be abnormally short/long or have intermittent jogs within the low duration of the spark.

SparkGraph.png

Spark Information Page

See Ignition Cylinder Information

Single Cylinder Dropout Test

See Ignition Single Cylinder Dropout Test

Debug Log

This page pulls a logs of recent input events on the ICM. It might be requested by EMIT tech support to get a picture of this page. Select "Offload Data" to update with the latest information.

Timing disc test

This page can be used to help determine the timing disc type. After cranking the engine several turns, select "Analyze data" and the system will give the result of the disc type if known.

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