Suspend Resume

Suspend Resume

Cruise control can be manually suspended and resumed (at the previous set speed) using the RES steering wheel switch. The ECM automatically suspends cruise control if one of the conditions required to enable the system is no longer present, e.g. the brakes are applied. Cruise control is also automatically suspended by the ECM if:

- The vehicle speed increases to more than 10 mph (16 km/h) above the set speed for more than 30 seconds, e.g. when travelling downhill or using the accelerator pedal to override cruise control.
- Engine speed increases too rapidly, e.g. if there is a fault in the gearbox or the gearbox goes into neutral.
- The vehicle decelerates too rapidly, e.g. when the brakes are applied.

Suspend
When the RES switch is pressed, the interface ECU outputs the OFF MFL message to the ECM. On receipt of the OFF MFL message, and when automatically suspending cruise control, the ECM reverts to normal fuelling control and changes the cruise control message on the CAN bus to inactive. The set speed is retained in memory by the ECM. On receipt of the cruise control inactive CAN bus message, the instrument pack extinguishes the cruise control warning lamp and the interface ECU switches off the cruise control engaged signal to the EAT ECU. The EAT ECU then returns to its previous operating mode.

Resume
While cruise control is suspended, when the RES switch is pressed the interface ECU outputs the MFL RESUME message to the ECM. Provided the vehicle is in the correct driving configuration, on receipt of the RESUME MFL message the ECM engages cruise control at the previous set speed and changes the CAN bus cruise control message back to active. The instrument pack then illuminates the cruise control warning lamp again and the interface ECU outputs the cruise engaged signal to switch the EAT ECU back to the cruise control mode.