Checklist Cruise Setup

This guide shows the recommend method to configure the Cruise control system. Clicking each item (M1 Tune v1.5 only) will select the item and allow you to enter the required information. Once an item has been selected the help, for that item, can be displayed by hitting the F1 key.

In poor or slippery conditions (snow, sand, mud) cruise control should not be used.

It is highly recommended to use 4 wheel speed sensors for good control and safety. One front and one rear wheel speed sensor is the recommended minimum. Control will function with only one speed sensor, but with reduced functionality.

This system uses Gear Ratio in the control strategy so gear detection and ratios should be set correctly. If no Gear value is available and reports Default, the system will still operate using the Default Gear Ratio. In this case the Default ratio should be set to 1.0 and the system will operate with reduced precision.

The cruise control feature controls vehicle speed to the set value by opening the throttle when the Throttle Pedal is not pressed.*

The speed limiter feature prevents the vehicle speed from exceeding the set value by closing the throttle when the Throttle Pedal is pressed.*

For the cruise control to function the following requirements must be met:

• The following cruise control buttons must be configured. These switches can share the same input source if a wired switch has more than one function.
  • Driver Cruise On Switch
  • Driver Cruise Off Switch
  • Driver Cruise Set Switch
  • Driver Cruise Cancel Switch
  • Driver Cruise Resume Switch
  • Driver Cruise Acceleration Switch
  • Driver Cruise Coast Switch
• At least one sensor or input for the Brake State must be set up. Brake State must be On or Off for the cruise control to be enabled.
• A switch input for the Cruise Exit Switch must be set up. If the application uses a clutch the Exit Switch can also be configured as the clutch switch as the Exit Switch Voltage is written to a firmware resource (usually Firmware 31). For an automatic transmission, a secondary brake pedal switch must be fitted.
• A Throttle Servo must be configured.
• Cruise Exit reports None, no exit conditions are fulfilled.
• At least one valid Wheel Speed sensor is required to calculate Cruise Vehicle Speed. At lease two Wheel Speed sensors are highly recommended.
• Two Cruise Indicator lamps for driver feedback (wired to the ECU), or a MoTeC dash connected on CAN.
• Cruise Mode must be Enabled.

For the speed limiter to function, the following requirements must be met:       

• The cruise control buttons must be configured (switches for On, Off, Set, Cancel, Resume, Acceleration, Deceleration). These are configured in the Driver subsystem. The switches can share the same input source if a wired switch has more than one function. See each Driver cruise switch for setup options.
• Cruise Exit reports None, no exit conditions are fulfilled. Note, there are less restrictions for speed limiting as the Throttle Pedal must be pressed.
• At least one valid Wheel Speed sensor is required to calculate Cruise Vehicle Speed.
• Cruise Mode must be Enabled.

The vehicle speed control is provided by Cruise Control Throttle Aim when Cruise State is On.

See Cruise Enable for the general enable conditions of the cruise control.

See Cruise State for the activation and exit conditions of the cruise control.

See Cruise Speed for the setup of the speed control function.

See Cruise Exit and Cruise for control exit conditions.

See Driver Cruise switches for details on switch configuration options.

* Speed control is performed by adjusting the throttle only. In some conditions e.g.. steep up or down hill, the speed may not be able to be maintained correctly.