ICON A5 MM : Propulsion : Engine : Troubleshooting : ECU Troubleshooting
ECU Troubleshooting
100132-00
Use the following table for ECU error message diagnostics.
Applicable Aircraft Serial Numbers
All
Type of Maintenance
Line
Level of Certification
LSA-RM
Task Specific Training Required
Yes—Current, Rotax-approved mechanic or repair facility
Special Tools Required
See Rotax 912 iS Sport (912 iS 2) Line Maintenance Manual
Parts Required
See Rotax 912 iS Sport (912 iS 2) Line Maintenance Manual
Aircraft System and Number
13—Propulsion
Safety Equipment
As Needed
Consumables
None
Table 15. ECU Error Message Troubleshooting
Error Message
Additional Symptom
Possible Cause
Remedy
“Ignition X (cyl X and X) Nominal Current not Reached”
+
“ETPU”
Rough engine running
Fuse box/ECU connection loose.
Reseat the ECU connectors, and X1 (D9104P), X2 (D9106P), X3(D9069P) connector on fuse box. See “Remove Fuse Box and Regulators” step 3.
Coil pack
Grease Coil Pack Connections. Adjust Coil pack spade connector crimp and apply DC4.
Fuse box/ECU/ignition cable connection
Reseat the ECU connectors, and the X1(D9104P), X2(D9106P), X3(D9069P) connectors at the fuse box and the connectors from the engine harness to the jumper, visually inspect for corrosion or any type of poor connection such as a push pin or receptacle. Pay particular attention to how the connector seats, these connectors are very easily cross threaded and the connector has a final detent that is very difficult to screw past while tightening in the tight area where the fuse box is located. If issue persists, replace engine harness to fuse box jumpers (X1 and X2) P/N ICA009357 (QTY 2). Adjust the connector crimp from the spade connector where it attaches to the wire on each coil. If issue not fixed, replace the engine harness completely.
Engine ignition system
Inspect engine ignition system, such as spark plugs, ignition wires/boots, fuel injectors, and replace parts as necessary. See “Rotax 912 iS Sport (912 iS 2) Line Maintenance Manual.
EGT (Exhaust Gas Temperature Sensor) Cylinder X
“ENGINE” / “LAND AIRCRAFT + ENGINE” Light
EGT failure
Throttle Position
Malfunctioned Manifold Air Pressure Sensor (MAPS)
Check for connection and signs of corrosion, clean, and reinstall. See “Rotax 912 iS Sport (912 iS 2) Heavy Maintenance Manual”.
Throttle Position Sensor issue
Check throttle cable connection to the engine throttle valve. See “Rotax 912 iS Sport (912 iS 2) Line Maintenance Manual”. Check and adjust throttle rigging. Inspect Throttle Control for Proper Travel and Security
Engine Ambient Pressure
Defective connection sensor connection
Check the wiring and connections of the AAPTS sensor. Remove the AAPTS sensor and inspect for debris or oily residue. If problem persists, replace AAPTS sensor as necessary.
Engine Ambient Temperature
Engine Ambient Pressure (Advanced BIT Engine On)
Malfunctioned Manifold Air Pressure Sensor (MAPS)
Check for connection and signs of corrosion, clean, and reinstall. Replace if necessary. See “Rotax 912 iS Sport (912 iS 2) Heavy Maintenance Manual. Replace air filter. Replace Engine Air Filter
Engine Ambient Temperature (Advanced BIT Engine On)
Clogged air filter
Injector Cyl X
“ENGINE”/”LAND AIRCRAFT + ENGINE” Light
Injector X
Check fuse box for blown fuse related to the injectors. Check injectors connection and wiring connecting to the injectors for signs of wear and chafing. If chafing is found but no strands are severed, F4 tape around the harness and secure it such that the chafing doesn’t occur again. If strands in the conductor are severed open the harness and splice the damaged area using an environmentally sealed butt splice. Replace corresponding injector if necessary. See “Rotax 912 iS Sport (912 iS 2) Heavy Maintenance Manual”.
Fuse box/ECU connection loose/Low ECU bus voltage.
Reseat the ECU connectors. Check corresponding injector connection on fuse box. See “Rotax 912 iS Sport (912 iS 2) Heavy Maintenance Manual”.
Consecutive “Test While Gen B Commanded”
Quick start technique results in Land Aircraft/Engine light.
Shut off engine. Follow standard engine startup procedure. See POH section 4.4 “ENGINE START”.
Consecutive “Test While Not Commanding Gen”
+
“Test while Gen B Commanded”
Too fast lane check during engine run-up results in Land Aircraft/Engine light.
Shut off engine. Follow standard engine run-up procedure. See POH section 4.7 “ENGINE RUN-UP”.
“ETPU”
+
Alternating “Test while Gen B Commanded”/”CAN Status Test”
Flashing ALTERNATOR light
DAC software.
Check and upstate DAC software version as necessary. Contact ICON Aircraft Owner Support.