12 Myers Street,
Sunshine,
Victoria 3020.
Australia.
PH: 61 3 9311 0587
.

The Injec ECU will show a warning code when it senses a problem that the operator needs to attend to. These warning codes are as self explanatory as possible given the space available.

WARNING: WATER TEMP SENDER OPEN CIRCUIT
The wire to the sensor has become detached or the sensor is faulty, i.e. open circuit. Check the wiring for continuity and if no fault is found test the sensor for nominal resistance.


WARNING: WATER TEMP SENDER SHORT CIRCUIT
The sensor wire has shorted to ground, usually the vehicle body. Check for open circuit fault with wire disconnected. If the fault changes state then it is the sensor at fault.

WARNING: AIR TEMP SENSOR OPEN / SHORT CIRCUIT
Testing procedure is the same as for the water temp sensor.

WARNING: THROTTLE POSITION WIPER SHORTED OR FAULTY
This warning alerts the operator that the throttle position sensor is returning a zero volts
signal to the ECU. This caused by either a lack of 5 volt supply or the output being shorted to ground.

WARNING: BATTERY VOLTAGE TOO HIGH
The trigger for voltage too high is 15.5 Volts this is likely to be an alternator or regulator fault. This must be corrected as damage to the battery will certainly occur. Some alternators can output as high as 30 Volts when the regulator fails

WARNING: BATTERY VOLTAGE TOO LOW
If the battery voltage drops below 9.6 Volts the Injec ECU may function erratically. The lowest voltage is usually encountered at cranking. If you cannot maintain at least 9.6 Volts then there is a need to repair this situation. Check the no load vs full load cranking voltage available at the battery positive terminal

WARNING: INJECTORS FULL OPEN. ENGINE LEANING OFF
The injectors have reached 95% duty cycle and cannot flow any more fuel. At this point first check that the fuel pressure is maintained by the pump under load. The pump chosen may not have sufficient flow at the regulated pressure. If it has then either raise the fuel pressure or fit larger injectors.

WARNING: FULL LOAD STEP INCREASE TOO LARGE
This message will be displayed if the operator has two adjacent settings that
are not very likely to be correct. i.e. 2000 rpm full load at 5.04 ms and 2500 rpm full load at 11.02 ms. The “step increase is greater than any engine would be likely to use.

WARNING: PIP EDGE TO CYLINDER MISMATCH
If the “number of cylinders is set to 4 and the “pip edges” are set to 4 and the TDC input is set to “extra” then the ECU would expect 5 pip edges per revolution.
There are many opportunities for incorrectly entering this critical information and the Injec ECU
performs a “truth test” to see if the numbers make sense. The engine can be test fired even if the warning is present.


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