How To Test If Auxiliary Water Pump Is Working Properly | Have Suction & Symptoms Of Bad Or Failing

Описание: In this video, young mechanic Aiman will show you a couple of ways to test to see if your engine auxiliary water pump is working properly and have good suction. This auxiliary water pump is from a 2009 Toyota Prius Hybrid Synergy Drive I4 1.5L (which is the same as model years 2004, 2005, 2006, 2007 & 2008). Here are the #ᴬᴰlinks to tools, parts and accessories you may need to perform this repair:

1. https://amzn.to/4ipkn6c | Autel Circuit Tester, Power Circuit Probe Tool, 12-24V Electrical Short Open Breaker Circuit Finder, Automotive Circuit Tester, Digital Multimeter/Relay & Diode Resistance Tool Kit, & 20FT Long Cord
1. https://amzn.to/4gq1YEt | KAIWEETS Voltage Tester/Non-Contact Voltage Tester with Signal Percentage, Dual Range AC 12V/70V-1000V, Live/Null Wire Tester, Electrical Tester with LCD Display, Buzzer Alarm, Wire Breakpoint Finder
2. https://amzn.to/49uHyI1 | AstroAI Digital Multimeter Tester 2000 Counts with DC AC Voltmeter and Ohm Volt Amp Meter; Measures Voltage, Current, Resistance, Continuity and Diode, Blue
3. https://amzn.to/3D4LOCa | G9020-47031 Engine Electric Inverter Cooler Water Pump Assembly for 2004-2009 Toyota Prius 1.5L

Or Click on Amazon link here and search for what you need: https://amzn.to/3D1T2GQ

An auxiliary water pump is different than a single water pump in that it is an electrically controlled motor. Its primary use is circulating water by way of a bypass hose from the main coolant lines to a heater core that is used to collect heat and distribute warm air into your vehicle when the heater is turned on.

There are many methods to test the pump, and in most cases you don't have to take it out from its mounting. You can use Power Probe III, a multi-meter, an old computer PC power supply or any other contraptions that's connected to a 12V DC power. The pump motor may be working but it may not have enough suction.

Not all cars have auxiliary pump, but it is common for many vehicles, especially hybrid cars & heavy duty pick-ups to have an auxiliary water pump that will expedite the process of coolant from the radiator, through the engine block, to a heater core, and then back to the radiator.

In Prius, the circulation of Internal Combustion Engine (ICE) coolant is a little bit complicated. Coolant will circulate from radiator to Heat Storage Tank (CHRS) to Auxiliary Water Pump via Coolant Flow Control Valve to the heater core, then to the engine block and then back to the radiator.

If an auxiliary water pump in Prius is not working, you may get air trapped in the heater core producing air bubbles and causing the vehicle to overheat and possibly that dreaded red triangle of death with temperature sign icon on the dashboard display. If you hear sloshing or swishing noise inside the cabin near the middle of the dashboard where the heater core is, then you have air bubbles in the heater core and the entire ICE coolant system has to be re-bled properly. We have a separate video on how to bleed the system as well videos on how to drain the coolant, how to replace the auxiliary water pump, how to remove and replace the coolant flow control valve and many more Prius related DYI auto repair ideas.

Symptoms of a Bad or Failing Water Pump (Auxiliary):

1. No warm air is coming from the heater
2. Heater has fluctuating heat
3. Window defrost is not working
4. High pitched buzzing sound from under your dashboard

This auxiliary water heater pump (Part# 87200-47030) looks almost the same especially in size to that of the pump for the coolant heat storage thank, but they're actually different and usually cost more.

Here are the part number for the other 3 pumps:
Primary electric pump - 16100-29157-83
Coolant heat storage pump - 16290-21011
Inverter coolant pump - G9020-47031

Here's the complete playlist of our Prius' videos:    • Toyota Prius Auto Repair & DIY How-To Vide...  

Thanks for watching, please check our other DIY auto repair tutorial & guide videos on EyeOnAiman's channel. Other cars Aiman have worked on includes Honda Accord, Civic, Insight, CR-V, Hyundai Santa Fe, Elantra and Toyota Prius Hybrid.

Obviously, Aiman's auto repair videos are mostly designed for entertainment purposes. Aiman is not a professional and not a certified ASE mechanic. The videos should always be used only as a guide.

You can watch all of Aiman's auto repair videos in the following playlist:    • How To Remove Alternator Hyundai Sonata 6t...  

This video is presented to you by Aiman-Imran Anuar. You can watch more of#Gen2Prius and #Aiman_DIY_Auto_Repair videos on #EyeOnAiman Youtube Channel & Facebook Page.

Note: This video is NOT sponsored. Some product links are affiliate links which means if you buy something we'll receive a small commission. As an Amazon Associate we earn from qualifying purchases.

Recording Date: November 25, 2018
Video URL:    • How To Test If Auxiliary Water Pump Is Wor...