Link G4X ECUs are capable of directly driving a shift light. The shift light point can be individually specified for each gear. For the Shift Light (PWM) function to work Gear Detection must be setup and working.

 

For wiring of an LED for a shift light see Switching an LED.

 

Shift Light Settings

·PWM Output - The Auxiliary pin that the Shift Light signal will be put out on.

·Frequency - The number of times per second the shift light will flash when on. 10 Hz will produce a flickering shift light, frequencies above this will lead to a dimming light. Frequencies higher than 50 Hz are not necessary.

·Start Duty Cycle - The percentage of time the shift light will be on for at the start of the Shift Control Range.

·End Duty Cycle - The percentage of time the shift light will be on for at the end of the Shift Control Range.

·Shift RPM Table - The engine speed in each gear at which the shift light will reach the End Duty Cycle. Above this engine speed the shift light will maintain the specified End Duty Cycle.

·Shift Control Range - The amount of RPM in each gear in which the shift light will transition from Start Duty Cycle to End Duty Cycle.

 

Setup Example

 

·PWM Output = Aux 5

·Frequency: 10 Hz

·Start Duty Cycle: 10%

·End Duty Cycle: 90%

·Shift RPM Table:

 

·Shift Control Table:

 

As the driver starts driving the following would happen:

1.The engine speed increases to 2950 RPM, the shift light starts flashing at 10% duty cycle. As the engine speed increases to 3750 RPM the shift light duty cycle increases to 90%.

2.The driver changes to 2nd gear, the engine speed drops and the shift light stops flashing. The engine speed increases to 4300 RPM, the shift light starts flashing at 10% duty cycle. As the engine speed increases to 5000 RPM the shift light duty cycle increases to 90%.

3.The driver changes to 3rd gear, the engine speed drops and the shift light stops flashing. The engine speed increases to 4900 RPM, the shift light starts flashing at 10% duty cycle. As the engine speed increases to 5500 RPM the shift light duty cycle increases to 90%.

4.The driver changes to 4th gear, the engine speed drops and the shift light stops flashing. The engine speed increases to 5500 RPM, the shift light starts flashing at 10% duty cycle. As the engine speed increases to 6000 RPM the shift light duty cycle increases to 90%.

5.The driver changes to 5th gear, the engine speed drops and the shift light stops flashing. The engine speed increases to 6100 RPM, the shift light starts flashing at 10% duty cycle. As the engine speed increases to 6500 RPM the shift light duty cycle increases to 90%.

6.The driver changes to 6th gear, the engine speed drops and the shift light stops flashing. The engine speed increases to 6200 RPM, the shift light starts flashing at 10% duty cycle. As the engine speed increases to 6500 RPM the shift light duty cycle increases to 90%.

 

Setup Notes

·The Shift Control Range and the Shift RPM is going to vary for each gear and each engine setup. The best numbers to use can be determined by speaking with the engine builder and the driver of the vehicle.

·If using an RPM Limit set the limit to be higher than the engine speed specified in the Shift RPM Table.

·If the vehicle is in a neutral (no gear) the Shift Light function will use the settings for Gear 0.