260 SAFETY Driver Override Feedback To The Driver Hill Start Assist (HSA) The driver may override HDC activation with throttle or brake application at any time. The instrument cluster has an HDC icon and the HDC switch has an LED icon, which offers feedback to the driver about the state HDC is in. HSA is designed to mitigate roll back from a complete stop while on an incline. If the driver releases the brake while stopped on an incline, HSA will continue to hold the brake pressure for a short period. If the driver does not apply the throttle before this time expires, the system will release brake pressure and the vehicle will roll down the hill as normal.
Deactivating HDC The cluster icon and switch lamp will illuminate and remain on solid when HDC is enabled or activated. This is the normal operating condition for HDC. HDC will be deactivated but remain available if any of the following conditions occur: Driver overrides HDC set speed with throttle or brake application. The cluster icon and switch lamp will flash for several seconds then extinguish when the driver pushes the HDC switch but enable conditions are not met. Vehicle speed exceeds 20mph (32km/h) but remains below 40mph (64km/h). The following conditions must be met in order for HSA to activate:
Vehicle is on a downhill grade of insufficient magnitude, is on level ground, or is on an uphill grade. The cluster icon and switch lamp will flash for several seconds then extinguish when HDC disables due to excess speed. The feature must be enabled. Vehicle is shifted to PARK. The vehicle must be stopped. The parking brake must be off. Disabling HDC The cluster icon and switch lamp will flash when HDC deactivates due to overheated brakes. The flashing will stop and HDC will activate again once the brakes have cooled sufficiently. The driver door must be closed. The vehicle must be on a sufficient grade. HDC will be deactivated and disabled if any of the following conditions occur:
The gear selection must match vehicle uphill direction (i.e., vehicle facing uphill is in forward gear; vehicle backing uphill is in REVERSE gear). The driver pushes the HDC switch. The driveline is shifted out of 4WD Low. WARNING! The parking brake is applied. HDC is only intended to assist the driver in controlling vehicle speed when descending hills. The driver must remain attentive to the driving conditions and is responsible for maintaining a safe vehicle speed. HSA will work in REVERSE gear and all forward gears. The system will not activate if the trans mission is in PARK or NEUTRAL. For vehicles equipped with a manual transmission, if the clutch is pressed, HSA will remain active.
The driver door opens. The vehicle is driven greater than 20mph (32km/h) for greater than 70 seconds. The vehicle is driven greater than 40mph (64km/h) (HDC exits immediately). HDC detects excessive brake temperature.