Radiator Fan System: Inspection: Notes
CAUTION:
- Be careful not to let your hands or other objects get caught in the rotating parts.
- Since some of the power supply circuits are shared with other system, check such system other than the radiator fan system for faulty conditions before proceeding any further.
- Since more than one faulty conditions may occur simultaneously, once work is done perform "Basic Inspection of Radiator Fan System" to confirm that the system is working properly.
- Since battery discharge may occur, charge the battery as necessary. Ref. to STARTING/CHARGING SYSTEMS (H4DO)>BATTERY>CHARGE .
- Use the check board when measuring the ECM terminal voltage and resistance. Ref. to ENGINE (DIAGNOSTICS) (H4DO)>GENERAL DESCRIPTION>PREPARATION TOOL>HOW TO USE CHECK BOARD .
Operating condition:
Radiator fan operates depending on the radiator fan operation mode related to engine coolant temperature or the radiator fan operation mode related to A/C compressor load, whichever is higher as an operation mode.
- Radiator fan operation mode related to engine coolant temperature (idle stop state)
- Radiator fan operation mode related to A/C compressor load