ENGINE MANUAL
IAE50R – AA
19.1.4.5 Error Codes
When the engine is stopped and fault–free, the ECU output B1 (TX) will be on continuously
switched to UBAT whilst the ECU is powered.
When the engine is running and fault–free, the output B1 (TX) will be switched to GND.
When an error is detected by the ECU unit, due either to a sensor failure, an out-of-range
indication or an internal unit fault, the ECU output B1 (TX) will give an indication of the
failure. Error warning display is continuously lit during engine operation. When the engine is
stopped, and there are errors, the ECU output B1 (TX) will flash with a coded message to
indicate which fault has occurred whilst the ECU is powered. Each error code consists of two
numbers. These are indicated via flashes in two groups (E.g. the code for 2 3: ECU output B1
(TX) will flash twice – then on steady for one second – and then flash three times).
If there is more than one error then each code will be flashed in sequence with 5 seconds
between codes.
The error lamp must be provided by the installer if required.
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