Chrysler 2005 Crossfire SRT6 Service Manual page 4198

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The Coolant Circulation Pump pumps the heated cool-
ant 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 Circula-
tion Pump on which drives the impeller via a magnetic
clutch. A light in the switch will illuminate indicating
that the REST system is active.
OPERATION - REST SYSTEM
The REST system is activated by a switch in the Heater-A/C Controls when the ignition is turned "OFF". This sys-
tem 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 temper-
ature 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 Battery Voltage Falls Below 11.5 Volts
HEATING & AIR CONDITIONING - SERVICE INFORMATION 24 - 69