Troubleshooting - Revision history

Thomas Peterson: /* Engine shuts down on fault normally, but manual stop causes the shutdown to get stuck */

2025-09-15T17:04:45Z

Engine shuts down on fault normally, but manual stop causes the shutdown to get stuck

← Older revision		Revision as of 17:04, 15 September 2025
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	*The logic on Digital Input 27 is probably backwards (ADEM Run Status). With the engine fully off, this input needs to be faulted. If it isn’t, try flipping Normally Open / Normally Closed, and then check the input wiring. The input should go from faulted to unfaulted when the engine starts up. The ADEM should be energizing the relay labeled “ADEM RUN SIGNAL” when the engine starts up (see panel schematic for relay numbering).		*The logic on Digital Input 27 is probably backwards (ADEM Run Status). With the engine fully off, this input needs to be faulted. If it isn’t, try flipping Normally Open / Normally Closed, and then check the input wiring. The input should go from faulted to unfaulted when the engine starts up. The ADEM should be energizing the relay labeled “ADEM RUN SIGNAL” when the engine starts up (see panel schematic for relay numbering).
	*The CAT panel could also have a cooldown period enabled. For a normal stop (without a fault) the engine is allowed to cool down and stop when the cooldown period is complete. The cooldown period length is a setting on the CAT panel or through CAT ET.		*The CAT panel could also have a cooldown period enabled. For a normal stop (without a fault) the engine is allowed to cool down and stop when the cooldown period is complete. The cooldown period length is a setting on the CAT panel or through CAT ET.
			*The CAT panel could be receiving a RUN command from some other source (E.g. the CAT selector switch is in the manual run position instead of Auto)

	====Engine shuts down on fault “DI-27 ADEM RUN STATUS”, even though the ADEM doesn’t show a fault code====		====Engine shuts down on fault “DI-27 ADEM RUN STATUS”, even though the ADEM doesn’t show a fault code====

Thomas Peterson: /* Hall sensor not moving */

2025-07-31T16:31:47Z

Hall sensor not moving

← Older revision		Revision as of 16:31, 31 July 2025
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	[[File:Ecu hall 330x.png\|700 px]]		[[File:Ecu hall 330x.png\|700 px]]

	Threaded hall sensor wiring, ICM box:		Threaded hall sensor wiring (P/N 13241 or 13264), ICM box:

	[[File:Icm hall threaded.png\|700 px]]		[[File:Icm hall threaded.png\|700 px]]

			Threaded hall sensor wiring (P/N 13241 or 13264), ECU:

			[[File:HALL ECU THREADED.png\|700 px]]

			''Note: For ECU pin numbering see [[ECU_Connector_Pinouts]]''

	*With ICM powered, unplug the hall sensor at the engine (or aux pickup) and verify the following on the harness end:		*With ICM powered, unplug the hall sensor at the engine (or aux pickup) and verify the following on the harness end:

Thomas Peterson at 18:56, 30 July 2024

2024-07-30T18:56:35Z

← Older revision		Revision as of 18:56, 30 July 2024
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	* If debris accumulates under the bezel it can screw up touch detection. Cleaning around the bezel can fix this issue.		* If debris accumulates under the bezel it can screw up touch detection. Cleaning around the bezel can fix this issue.
	* Sometimes the screen bracket is too tight causing this issue. Remove the back cover and loosen the left and right screen screws slightly (3 per side that go into bezel)		* Sometimes the screen bracket is too tight causing this issue. Remove the back cover and loosen the left and right screen screws slightly (3 per side that go into bezel)

			==EDR==

			See [[EDR_Troubleshooting_Guide]]

Thomas Peterson: /* Throttle Feedback Problems */

2024-06-10T20:17:09Z

Throttle Feedback Problems

← Older revision		Revision as of 20:17, 10 June 2024
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	*If voltage appears on only one of 21/20, the other connection has a break between the module and the throttle body		*If voltage appears on only one of 21/20, the other connection has a break between the module and the throttle body
	*If the voltages are roughly correct and the motor can move, but the calibration is still failing, it could be because of a problem with the pcb (preventing the reading of the voltage) or a bad throttle body (where the feedback potentiometer is not functioning correctly).		*If the voltages are roughly correct and the motor can move, but the calibration is still failing, it could be because of a problem with the pcb (preventing the reading of the voltage) or a bad throttle body (where the feedback potentiometer is not functioning correctly).

			'''Note: The above wiring assumes a stand-alone module. The ECU throttle pinout is:'''

			[[File:Ecu thr.png\|700px]]

	==== Panel switches reading incorrectly ====		==== Panel switches reading incorrectly ====

Thomas Peterson: /* RPM Reads “0” when cranking */

2024-06-10T20:04:16Z

RPM Reads “0” when cranking

← Older revision		Revision as of 20:04, 10 June 2024
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	[[File:GovMpuPanel.png\|800px]] ''Wiring through panel terminal block''		[[File:GovMpuPanel.png\|800px]] ''Wiring through panel terminal block''

			[[File:Ecu fw mpu.png]] ''Wiring to an ECU''

	While the flywheel turns, the MPU generates an AC voltage wave where the frequency is equal to the speed of the flywheel movement.		While the flywheel turns, the MPU generates an AC voltage wave where the frequency is equal to the speed of the flywheel movement.

Thomas Peterson: /* Hall sensor not moving */

2024-06-10T19:59:52Z

Hall sensor not moving

← Older revision		Revision as of 19:59, 10 June 2024
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	If the input information screen shows the hall sensor not moving, or the alarm “Hall Disconnect” is thrown when using a hall sensor, then the board is not seeing the hall sensor at all. Typical system wiring diagrams are shown below. Verify that pin 14 is used for hall sensor power, and not pin 25.		If the input information screen shows the hall sensor not moving, or the alarm “Hall Disconnect” is thrown when using a hall sensor, then the board is not seeing the hall sensor at all. Typical system wiring diagrams are shown below. Verify that pin 14 is used for hall sensor power, and not pin 25.

	~~330x~~ Hall sensor Wiring:		330xB Hall sensor Wiring, ICM box:

	[[File:Icm hall 330x.png\|700px]]		[[File:Icm hall 330x.png\|700px]]

	Threaded hall sensor wiring:		330xB Hall sensor wiring, ECU:

			[[File:Ecu hall 330x.png\|700 px]]

			Threaded hall sensor wiring, ICM box:

	[[File:Icm hall threaded.png\|700 px]]		[[File:Icm hall threaded.png\|700 px]]

Thomas Peterson: /* RPM Reads "0" when cranking */

2024-06-10T19:54:27Z

RPM Reads "0" when cranking

← Older revision		Revision as of 19:54, 10 June 2024
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	For an ECU ignition, the wiring is:		For an ECU ignition, the wiring is:

	File:Ecu fw mpu.png		[[File:Ecu fw mpu.png]]

	While the flywheel turns, the MPU generates an AC voltage wave where the frequency is equal to the speed of the flywheel movement.		While the flywheel turns, the MPU generates an AC voltage wave where the frequency is equal to the speed of the flywheel movement.

	*Verify that the flywheel teeth MPU is plugged into the correct circular connector. The ICM box has two circular connectors for MPU- one for flywheel teeth and one for the index.		*(ICM) Verify that the flywheel teeth MPU is plugged into the correct circular connector. The ICM box has two circular connectors for MPU- one for flywheel teeth and one for the index.
	*If above is verified correct, unplug the MPU and use a multimeter to measure AC Volts across the two MPU wires while cranking. It should show around 2-10V AC. If less is shown, then one of the following may be the cause:		*If above is verified correct, unplug the MPU and use a multimeter to measure AC Volts across the two MPU wires while cranking. It should show around 2-10V AC. If less is shown, then one of the following may be the cause:
	**The MPU is bad		**The MPU is bad
Line 301:		Line 301:
	**A stronger MPU is needed		**A stronger MPU is needed
	**The MPU is not close enough to the flywheel (typically should be ¼ to ½ turn out)		**The MPU is not close enough to the flywheel (typically should be ¼ to ½ turn out)
	*If test above passes, plug the MPU back in and check the AC voltage at the ICM phoenix plug (pins 22/23) with the phoenix plug removed. Again it should be roughly 2-10V AC during cranking. If less is shown, there is a wiring problem in the harness or box preventing the signal from reaching the ICM.		*(ICM) If test above passes, plug the MPU back in and check the AC voltage at the ICM phoenix plug (pins 22/23) with the phoenix plug removed. Again it should be roughly 2-10V AC during cranking. If less is shown, there is a wiring problem in the harness or box preventing the signal from reaching the ICM.
	*If test above passes, plug the phoenix plug back into the ICM and measure the AC voltage again while cranking. If it is low in this case, the ICM MPU input may be damaged		*(ICM) If test above passes, plug the phoenix plug back into the ICM and measure the AC voltage again while cranking. If it is low in this case, the ICM MPU input may be damaged
	*Verify that the flywheel teeth setting is correct		*Verify that the flywheel teeth setting is correct

Thomas Peterson: /* RPM Reads "0" when cranking */

2024-06-10T19:52:02Z

RPM Reads "0" when cranking

← Older revision		Revision as of 19:52, 10 June 2024
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	==== RPM Reads "0" when cranking ====		==== RPM Reads "0" when cranking ====

	A general diagram of the MPU circuit is ~~shown below~~		A general diagram of the MPU circuit for an ICM box is:

	[[File:Icm mpu.png\|700 px]]		[[File:Icm mpu.png\|700 px]]

			For an ECU ignition, the wiring is:

			File:Ecu fw mpu.png

	While the flywheel turns, the MPU generates an AC voltage wave where the frequency is equal to the speed of the flywheel movement.		While the flywheel turns, the MPU generates an AC voltage wave where the frequency is equal to the speed of the flywheel movement.

Thomas Peterson: /* Engine shuts down on fault “DI-27 ADEM RUN STATUS”, even though the ADEM doesn’t show a fault code */

2023-11-21T17:11:10Z

Engine shuts down on fault “DI-27 ADEM RUN STATUS”, even though the ADEM doesn’t show a fault code

← Older revision		Revision as of 17:11, 21 November 2023
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	====Engine shuts down on fault “DI-27 ADEM RUN STATUS”, even though the ADEM doesn’t show a fault code====		====Engine shuts down on fault “DI-27 ADEM RUN STATUS”, even though the ADEM doesn’t show a fault code====
	*This could be an issue with the Driven ~~Equipment Ready circuit (usually CR3~~), ~~Start/~~Run ~~circuit~~ (~~usually CR2~~)~~, or run status circuit back to DI-27~~
	*For ~~each~~ of the above three circuits, ~~make sure~~ all ~~connections are correct~~ and ~~secure~~. ~~It is also possible~~ the ~~relays are faulty~~.		The panel uses two relays to signal the engine to run (Driven equipment ready and Run/Start), and one relay for a signal back from the engine to see that it is running (ADEM Run Status). See [[Panel_to_ADEM(r)_Interfacing#Start_/_Stop_/_Fault_Control]] for diagrams and more detailed descriptions.

			For any of the above three circuits if there was any issue with the relays or wiring it could throw this code because either the panel wanted to stay running and the engine thought it should stop, or the panel thought the engine wanted to stop when it actually wanted to stay running. For all three circuits and relays check over the wires between the panels, relays, and relay wiring. Changing the relay module (white component) would be recommended. Any loose or intermittent connection on these three circuits would cause this issue.

	====Engine or compressor post lube do not work====		====Engine or compressor post lube do not work====

Thomas Peterson: /* Startup fails with “ECU fails to start” but the unit never tries to start (CAT engines) */

2023-11-21T16:47:18Z

Startup fails with “ECU fails to start” but the unit never tries to start (CAT engines)

← Older revision		Revision as of 16:47, 21 November 2023
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	# Does the "Run / Start" relay work? Go to Settings - Brain - Output Status / Testing - Digital Out testing. Toggle DO-2 on and off and see if CR2 toggles on and off.		# Does the "Run / Start" relay work? Go to Settings - Brain - Output Status / Testing - Digital Out testing. Toggle DO-2 on and off and see if CR2 toggles on and off.
	#* NO: Check with a volt meter if DO-2 on the Brain changes between 0v and 24v referenced to ground while the test page is used to toggle the output. If not, the module is bad. If it does then the wiring to A1 or A2 of the relay CR2 is bad, or the relay itself is bad. DONE		#* NO: Check with a volt meter if DO-2 on the Brain changes between 0v and 24v referenced to ground while the test page is used to toggle the output. If not, the module is bad. If it does then the wiring to A1 or A2 of the relay CR2 is bad, or the relay itself is bad. DONE
	#* YES: go to (8)		#* YES: go to (8) or (9)
	# If the engine is an ADEM4 with OCP or any ADEM3:		# If the engine is an ADEM4 with OCP or any ADEM3:
	#* Check the schematic to see if it shows a jumper required between 113,B and 112,B. If the schematic shows this jumper, make sure it is installed in the panel.		#* Check the schematic to see if it shows a jumper required between 113,B and 112,B. If the schematic shows this jumper, make sure it is installed in the panel.