How to troubleshoot a radiator fan that won't shut off when the engine is cool on Lexus ES300?

To troubleshoot a Cooling Fan Assembly that won't shut off when the engine is cool, disconnect the wiring connector from the coolant temperature switch(es) and bridge the connector. If this shuts off the fan, replace the switch. Test the number 1 and number 2 Engine Coolant Temperature switches for continuity with an ohmmeter. If either switch fails these tests, replace the defective switch. To test an inoperative fan motor, check the fuses or fusible links, then disconnect the electrical connector at the motor and use fused jumper wires to connect the fan directly to the battery. If the fan still does not work, replace the fan motor. If the motor tested OK but is still inoperative, then the fault lies in the relays, wiring, or the cooling fan ECU. To check the relays, locate the main relay box and remove the cooling fan no.1 relay, testing for continuity. If all relays test OK, take the vehicle to a dealer or other qualified repair facility for further diagnosis. To remove the fan, disconnect the negative battery cable, disconnect the wiring connector at the fan motor, unbolt the fan/shroud from the radiator, and lift it from the vehicle. To install, reverse the removal steps and use a new clip when installing the blade to fan motor number 2, orienting the clip's open side to clear the projecting bump on the blade.

Genuine Lexus ES300 Cooling Fan Assembly

Engine Cooling Fan

Select Vehicle by Model
Select Vehicle by VIN

Select Vehicle by Model

Make

Model

Year

Select Vehicle by VIN

For the most accurate results, select vehicle by your VIN (Vehicle Identification Number).

7 Cooling Fan Assemblys found

View related parts
Lexus ES300 Fan
Part Number: 16361-20120
$126.80 MSRP: $171.48
You Save: $44.68 (27%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Fan, NO.2
- Manufacturer Note: MARK 343
- Replaced by: 16361-0A131
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 1998-2003 Lexus ES300 | 6 Cyl 3.0L, 6 Cyl 3.3L | 1MZFE, 3MZFE; MCV20L-BTPGKA, MCV20L-BTPGKK, MCV30L-BEAGKA, MCV31L-BEAGKA
View related parts
Lexus ES300 Fan
Part Number: 16361-20110
$99.49 MSRP: $132.38
You Save: $32.89 (25%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Manufacturer Note: MARK 342
- Replaced by: 16361-0A121
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 1998-2003 Lexus ES300 | 6 Cyl 3.0L, 6 Cyl 3.3L | 1MZFE, 3MZFE; MCV20L-BTPGKA, MCV20L-BTPGKK, MCV30L-BEAGKA, MCV31L-BEAGKA
View related parts
Lexus ES300 Fan
Part Number: 16361-20050
$70.84 MSRP: $95.80
You Save: $24.96 (27%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Fan Blade
- Manufacturer Note: MARK 324
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2003 Lexus ES300 | 6 Cyl 3.3L | 3MZFE; MCV31L-BEAGKA
View related parts
Lexus ES300 Fan
Part Number: 16361-20030
$90.09 MSRP: $121.82
You Save: $31.73 (27%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Fan Blade
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 1997-1999 Lexus ES300 | 6 Cyl 3.0L | 1MZFE; MCV20L-BTPGKA, MCV20L-BTPGKK
View related parts
Lexus ES300 Fan
Part Number: 16361-28050
$98.14 MSRP: $132.72
You Save: $34.58 (27%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Fan, NO.2; Fan Blade
- Manufacturer Note: MARK 357
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 2003 Lexus ES300 | 6 Cyl 3.3L | 3MZFE; MCV31L-BEAGKA
View related parts
Lexus ES300 Fan
Part Number: 16361-20040
$125.65 MSRP: $171.31
You Save: $45.66 (27%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Fan, NO.2; Fan Blade
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 1997-1999 Lexus ES300 | 6 Cyl 3.0L | 1MZFE; MCV20L-BTPGKA, MCV20L-BTPGKK
View related parts
Lexus ES300 Fan
Part Number: 16911-64010
Product Specifications
- Other Name: Blade, Fan Blade
- Warranty: This genuine part is guaranteed by Lexus's factory warranty.
Fits the following Vehicles:
- 1992-1996 Lexus ES300 | 6 Cyl 3.0L | 1MZFE, 3VZFE; MCV10L-BTPGKA, MCV10L-BTPGKK, VCV10L-BTMGKA, VCV10L-BTMGKK, VCV10L-BTPGKA, VCV10L-BTPGKK

Lexus ES300 Cooling Fan Assembly

That is why this part Lexus ES300 Cooling Fan Assembly is very important and proves that the brand thinks about reliable and effective car creating. This part is used as a cooling fan assembly which is specially suited for different models of ES300; it cools the engine by supplying sufficient airflow to the radiator. The assembly may be mechanical or electrical but in most of Lexus' current models, electrical assembly is the commonly used one. The electric Cooling Fan Assembly has a 12V motor that switches when the flow of Coolant or when there is a need for Air conditioning which increases the efficiency in addition to safety. This intelligent operation not only helps avoiding over heating but also helps in increasing the overall life of the engine. Lexus ES300 Cooling Fan Assembly is designed in this way with an almost inflexible blade in fan, mounting shroud and responsive motor hence provides efficient cooling results. The versatility with the ML range of ES300 models shows that drivers get a reliable assembly, which does not depend on the generation of the model. Also critically is the Cooling Fan Assembly that is unique to the automotive markets since it closely works with the powertrain control module or PCM to adjust the fan's operation depending on the prevailing conditions. In conclusion, the Lexus ES300 Cooling Fan Assembly is a perfect example of the brand's commitment to provide customers with a luxurious car that along with providing comfort will improve driving experience and at the same time increase safety and reliability of the vehicle.

Should you need to purchase new auto parts for your vehicle, we strongly suggest you consider the genuine Lexus ES300 Cooling Fan Assembly available on LexusPartsNow.com. Our OEM Lexus ES300 Cooling Fan Assembly come with the reassurance of the manufacturer's warranty, a hassle-free return policy, and speedy delivery service, all at affordable prices online. Feel free to shop with confidence!

Lexus ES300 Cooling Fan Assembly Parts Questions & Experts Answers

Fan
16361-20040
Q: How to troubleshoot a radiator fan that won't shut off when the engine is cool on Lexus ES300?
A:
To troubleshoot a Cooling Fan Assembly that won't shut off when the engine is cool, disconnect the wiring connector from the coolant temperature switch(es) and bridge the connector. If this shuts off the fan, replace the switch. Test the number 1 and number 2 Engine Coolant Temperature switches for continuity with an ohmmeter. If either switch fails these tests, replace the defective switch. To test an inoperative fan motor, check the fuses or fusible links, then disconnect the electrical connector at the motor and use fused jumper wires to connect the fan directly to the battery. If the fan still does not work, replace the fan motor. If the motor tested OK but is still inoperative, then the fault lies in the relays, wiring, or the cooling fan ECU. To check the relays, locate the main relay box and remove the cooling fan no.1 relay, testing for continuity. If all relays test OK, take the vehicle to a dealer or other qualified repair facility for further diagnosis. To remove the fan, disconnect the negative battery cable, disconnect the wiring connector at the fan motor, unbolt the fan/shroud from the radiator, and lift it from the vehicle. To install, reverse the removal steps and use a new clip when installing the blade to fan motor number 2, orienting the clip's open side to clear the projecting bump on the blade.