The Check Engine Light function is used to control the factory or an after market Check Engine light on a vehicles dash-board.
NOTE: A list of all possible ECU Fault Codes and how to clear them can be found HERE.
The following settings exist for the Check Engine Light function:
Used to select which Auxiliary output will be used by this function
Determines what will happen when a fault code is present and the engine is running
·On When Fault Codes - The Check Engine light will be constantly illuminated.
·Flash Fault Codes - The fault code(s) present will be flashed by the Check Engine light.
Two Check Engine light modes exist. These are known as Long Tens and Short Tens.
·Long Tens
Fault codes are displayed as a succession of long and short flashes. Long flashes indicates tens where short flashes indicate ones. A large pause between flashes separates fault codes. Fault codes will be displayed in a repeating list.
Example
Assume the following sequence of flashes was displayed:
This pattern would indicate fault codes:
1.12 (one long, two short)
2.24 (two long, four short)
3.30 (three long, no short)
Note: If the ECU has a fault code present and the RPM is greater than zero the CE light will stay on and not flash the codes.
·Short Tens
Fault codes are displayed as a succession of short flashes and gaps. First the tens flash and then after a gap the ones flash. A large pause between flashes separates fault codes. Fault codes will be displayed in a repeating list.
A list of all possible ECU Fault Codes can be found HERE.
Example
Assume the following sequence of flashes was displayed:
This pattern would indicate fault codes:
1. 12 (one short, two short)
2. 24 (two short, four short)
3. 30 (three short)
Determines what will happen when NO fault code is present and the key is in the On position (engine not running).
·ON - The Check Engine light will be on. This is the way most OEM systems operate.
·OFF - The Check Engine light will be off.
Note: Some Link wire-in ECUs contain an LED in the front. With the exception of the Flash Mode setting, other settings above do not affect this LEDs function.