Constant Control Relay Module

The radiator electric motor (8K621) is controlled during vehicle operation by the constant control relay module (CCRM) (12B581) and powertrain control module (PCM) (12A650) which energizes the radiator electric motor under the following conditions:

• Engine temperature higher than normal. Radiator electric motor starts operating at 105°C (221°F) and stops when temperature drops to 94°C (200°F).
• A/C ON and vehicle speed does not provide enough natural airflow and radiator electric motor starts running at or below 69 km/h (43 mph) and stops at 77 km/h (48 mph).