Radiator Fan System: Inspection: Notes
WARNING: This page is about a different variant/trim than selected.
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(HEV))>BATTERY>CHARGE .
- Use the check board when measuring the ECM terminal voltage and resistance. Ref. to ENGINE (DIAGNOSTICS) (H4DO(HEV))>GENERAL DESCRIPTION>PREPARATION TOOL>HOW TO USE CHECK BOARD .
Operating condition:
Operation conditions while the engine is running are shown in the table below.
| Vehicle speed | A/C compressor load | Engine coolant temperature | ||
|---|---|---|---|---|
| Increase: 98°C (208°F) or less Decrease: 96°C (205°F) or less |
Increase: 99 - 104°C (210 - 219°F) Decrease: 97 - 102°C (207 - 216°F) |
Increase: 105°C (221°F) or more Decrease: 103°C (217°F) or more |
||
| Radiator fan operation | Radiator fan operation | Radiator fan operation | ||
| During acceleration: 19 km/h (12 MPH) or less During deceleration: 10 km/h (6 MPH) or less |
OFF | OFF | Low-Speed | High-Speed |
| Low | Low-Speed | Low-Speed | High-Speed | |
| High | High-Speed | High-Speed | High-Speed | |
| During acceleration: 20 - 69 km/h (12 - 43 MPH) During deceleration: 11 - 64 km/h (7 - 40 MPH) |
OFF | OFF | Low-Speed | High-Speed |
| Low | High-Speed | High-Speed | High-Speed | |
| High | High-Speed | High-Speed | High-Speed | |
| During acceleration: 70 - 134 km/h (43 - 83 MPH) During deceleration: 65 - 129 km/h (40 - 80 MPH) |
OFF | OFF | Low-Speed | High-Speed |
| Low | OFF | Low-Speed | High-Speed | |
| High | Low-Speed | High-Speed | High-Speed | |
| During acceleration: 135 km/h (84 MPH) or more During deceleration: 130 km/h (81 MPH) or more |
OFF | OFF | OFF | High-Speed |
| Low | OFF | Low-Speed | High-Speed | |
| High | OFF | Low-Speed | High-Speed | |