toyota prius electric water pump
toyota prius electric water pump – The Prius has two cooling systems. One is dedicated to checking the temperature of the engine and the other maintains both the unit of the inverter and the gearbox (aka the box of speed) of overheating. Although the engine cooling system in Gen2 prius uses a belt driven water pump, the inverter cooling system instead uses an electric pump (with brushes direct current of motor as core). In 2007, Toyota released a TSB (Technical Service Bulleting) stating that any Gen2 Prii 2004-2007 would be recalled to replace this pump by an updated design due to its premature failure. Although the new design lasts longer than the previous version, it still fails somewhere near 100,000 km.
The pump can fail before this if the air is trapped in the cooling system for any reason whatsoever. In my opinion, another reason that contributes to this premature failure would be the fact that it runs at full speed all the time. Toyota corrected this in its Gen3 Prius by introducing a variable speed water pump (using a step motor as a kernel) that is activated based on actual temperature readings. The Prii in Sri Lanka are equipped with the new design since they were manufactured after 2007 (more or less). However, they fail with time.
It is therefore a good idea to know the first signs of problems. It’s really simple. All you need to do is follow these simple steps: 2. Make sure the brake pedal is not pushed in. 3. Press the start button twice (without pressing the brake pedal). At this point, the color on the start button should be orange and the READY indicator should be off. This is the IG ON position of the Prius. 5. Locate the inverter (the silver box with Hybrid Synergy Drive) on the passenger side. 6. Locate the inverter coolant reservoir mounted on the left side of the inverter. 7. Locate the black rubber hose attached to the front of the inverter coolant reservoir. 8. Touch the black rubber hose mentioned above with two fingers to feel if there is a vibration.
The first symptom that almost all Prius owners notice is that the A / C compressor is cut off intermittently. That is to say. The conditioned air works well when the vehicle starts in the morning, but the cooling effect has exceeded about 10 km. This works well once the vehicle is restarted. Since the inverter unit houses the main supply circuit of the hybrid system, a faulty pump will cause the unit to overheat and shut down some powered systems © by this device. Including the A / C compressor and the DC-DC converter which holds the 12V auxiliary battery charged.
The 12v battery in case of load failure would be the second symptom. Vehicle accessories (eg, Radio, lights, etc.), including the entire EFI system, operate on the 12v power source and therefore 12v drained through To a system. The load system inevitably dampens the engine.
The above symptoms may occur even if the lights do not light. But usually the hybrid light (red triangle) and the control motor, the ABS and VSC lights come on when the 12v charging system is switched off. 1. Open the cover of the black fuse box on the passenger side of the engine bay. 2. Locate the AM2 15A fuse at the top right (see IMAGE 1 and focus on the fuse in red). 3. Remove the AM2 fuse and check if it is blown (check if the metal wire inside the fuse is broken).
If it is blown, go to the next step. 4. Locate the intermidiate (see IMAGE 2) 5. Disconnect the above-mentioned connector (see IMAGE 3 AND 4). This is the simOne way to disable the inverter pump without touching the electrical connector of the pump itself. 6. After removing the connector, replace the AM2 fuse with one of the replacement fuses. If, for any reason, the replacement fuses have been