Trail Control

When the trail control switch is pressed, the IPC sends a message to the GWM over the HS-CAN3. The GWM relays this message to the ABS module over the FD-CAN. The trail control is now engaged and the indicator is illuminated gray until the system is activated.

To activate, the trail control feature requires the following conditions to be met:

• Driver door is closed.
• Parking brake is released.
• Vehicle speed is less than 31 km/h (20 mph) with the transfer case in high range.
• Vehicle speed is less than 15 km/h (10 mph) with the transfer case in low range.
• Vehicle speed is less than 8 km/h (5 mph) with the transmission in REVERSE.

Once activated, the trail control indicator turns green and vehicle speed is maintained at the set speed. The set speed can be increased or decreased using the plus and minus buttons on the steering wheel. Set speed may also be decreased using the brake pedal. When the brake pedal is pressed and released, the set speed matches the vehicle speed when the pedal is released. If the accelerator pedal is pressed, the vehicle accelerates normally and, once the pedal is released, the vehicle returns to the previously set speed.

The trail control feature transitions from active to enabled when any of the following occur:

• The trail control button is pressed.
• The transmission is shifted into PARK.

The trail control feature transitions from active to braking only when any of the following conditions are met:

• The driver door is opened.
• The parking brake is applied.
• A substantial service brake pedal application occurs.

When any one of the above conditions are met, the trail control feature disables the driving torque and attempts to bring the vehicle to a controlled stop using the ABS. If the driving torque is disabled while descending or ascending an incline the trail control feature uses the ABS to apply to brakes and allow the vehicle to descend the incline.