Acura Tech Tip: Radiator or Condenser Fan Operates Continuously

Acura Tech Tip: Radiator or Condenser Fan Operates Continuously

If the radiator fan and/or the condenser fan runs continuously; or, if the fan(s) runs continuously when the engine is off, the battery may be discharged.

If the radiator fan and/or the condenser fan of the vehicles listed below runs continuously; or, if the fan(s) runs continuously when the engine is off, the battery may be discharged.

APPLIES TO:
2000 3.2 TLs – from VIN 19UUA5…YA000001 through VIN 19UUA5…YA057139; and 2001 3.2 CLs – from VIN 19UY4A…1A000001 through VIN 19UYA4…1A015025.

PROBABLE CAUSE:
The radiator and/or condenser fan relay has failed.

CORRECTIVE ACTION:
Replace both relays. If one relay fails, you must replace both.

PARTS INFORMATION:
Relay assembly (two required): P/N 39794-S0K-A01.

DIAGNOSIS:
• If the battery is discharged, and there is no apparent reason, remove the radiator fan and condenser fan relays from the underhood fuse/relay box, and shake them one at a time. If you hear a rattle coming from either relay, go to the Repair Procedure.
• If the fan(s) runs continuously with the ignition switch off, install known-good relay(s) and verify that the fan(s) stops. If the fan(s) stops with the known-good relay(s), go to the Repair Procedure.
Note: If the coolant temperature is high (above 185° F) when the ignition is switched off, the fan(s) will automatically run for about 15 minutes.
• If the battery is discharged and the relay(s) are OK, troubleshoot other causes.

REPAIR PROCEDURE:
1. Remove and replace the radiator fan and condenser fan relays in the underhood fuse/relay box. Refer to page 10-15 of the 1999-2001 3.2 TL service manual or page 10-13 of the 2001 3.2 CL service manual.
2. Turn off the A/C, start the engine and let it warm up. Make sure the fans cycle on and off when the engine reaches normal operating temperature.

Technical service bulletin courtesy of Acura Parts Express.

You May Also Like

Toyota Prius Battery Codes P0A7F, P2011 and P0A80

A second generation Toyota Prius is at least 12 years old and batteries may need to be replaced. Here’s what the codes mean.

Battery pack replacement is becoming more common as hybrid vehicles age. The second-generation Prius started with the 2004 model year and lasted until 2009. They have racked up many miles in the past decade or more, and the nickel-metal hydride battery is probably not providing the same range as before.

Air Ride Diagnostics: Reservoirs and Compressors

The secret to diagnosing air ride problems is knowing what criteria the system uses to regulate the compressor/reservoir and having the right tool.

Mazda SkyActiv Engine Service Tips

These engines have been reliable, but there are four pattern failures you might see.

Honda Indirect TPMS Systems

Honda indirect TPMS systems do not have air pressure sensors inside the tires.

Honda Oil System Inspection

The leading cause of low oil pressure-related complaints with Honda vehicles is the oil level.

Other Posts

ADAS Calibration Tips

Here are 10 tips to follow during ADAS Calibration.

ADAS Calibration Aborts

Knowing the common “hiccups” can save you time and money.

Fuel Pumps and Cranking

Diagnosing the problem comes down to understanding what causes a loss of fuel pressure.

Electric Power Steering Diagnostics

Load management for steering systems.