Rest System

The coolant circulation pump pumps the heated coolant to the heater core when the engine is off. When the REST button (4) is pressed the temperature is controlled by the A/C heater control module (in the same manner as when the ignition is ON). The A/C heater control module switches the coolant circulation pump on which drives the impeller via a magnetic clutch. A light in the switch will illuminate indicating that the REST system is active.




The REST system is activated by a switch in the heater-A/C controls when the ignition is turned OFF . This system circulates residual heat from the engine to the heater core. The coolant is recirculated by an auxiliary coolant pump mounted below the right front headlamp. The temperature is automatically adjusted according to the temperature setting in the heater-A/C controls.

The REST system will automatically be shut off when:
- The ignition key is turned ON .
- After approximately 30 minutes of operation.
- If the battery voltage falls below 11.5 volts.