Newbie here...HV Battery Cooling Fan Question

I have a 2014 C Four, replaced the HV Battery after the death code PA080 appeared during what appears to be a strange and unique problem(?)

Re-utilized the HV Battery Cooling Fan from my previous battery. First time out after new HV battery install, car drove about 5 miles, charging properly when viewing the power meter screen and the same death triangle / warning came up on the screen. This time however, because I did not reinstall the back seat, I observed what may be a cause for the repeated trip. I noticed, just as I felt the "thump" and sudden power change in the car, the cooling fan had kicked on simultaneously. I reset the code and drove about another 4 miles and again appears that when the fan engaged, the power loss and code was tripped.

After clearing the codes a second time the "trip" happened again almost immediately but now the fan was turning very slowly, eventually the fan sped up to what appears to be normal speed. Mechanic friend thinks that the fan has gone bad and any surge or drop in AMPS when that fan kicks on is signaling the computer to trip PA080 code.

If anyone has knowledge on this and can assist, greatly appreciate the help. Questions are:

1. Is it normal operation for the cooling fan to vary in its speed? EG: Fan speed starts off very slow, and speed increases slowly or suddenly as part of normal operation

2. What is the location, in the hybrid system where one can find the fan relay, if there is one?

Thanks All
StevieD

 

The trouble code for a bad HV battery is P0A80. I think you made a typo.

What HV battery did you purchase? New OEM or a refurbished battery or something else?

How many miles on the car?


There are many different trouble codes that will trip the red triangle warning light. Did you read the trouble codes again, or did you just assume that it was the same P0A80 code?

The HV battery cooling fan will increase to the maximum speed when the red triangle warning light is triggered. The cooling fan will not directly trigger the red triangle warning light, but if the HV battery overheats, the red triangle warning light will turn on, but that will trigger a different trouble code.


Yes, the cooling fan has multiple speeds, and the speed is controlled by one of the ECUs in the car.


Hi Brian....thank you for your response here!

Yes I did make a typo, thank you.

I will answer your questions here:

- Refurb from best hybrid batteries web page, Chicago area company with great reviews and a full 3 year warranty
- Car has 178,000 miles

Below is exactly what the report reads:

HV ECU - Current Codes
P0A0D High Voltage System Interlock Circuit High
P0A80 Replace Hybrid Battery Pack
P3015 Battery Block 5 becomes weak

HV ECU - History Codes
P0A0D High Voltage System Interlock Circuit High
P0A80 Replace Hybrid Battery Pack
P3015 Battery Block 5 becomes weak

HV ECU - Pending Codes

P0A80 Replace Hybrid Battery Pack
P3015 Battery Block 5 becomes weak

Antilock Brakes - Current Codes
C1259 HV System Regenerative Fault
C1310 Fault in HV System / ACTV Brake Booster Solenoid

Tire Pressure Monitor - History codes
C2122 Transmitter ID 2 not received (Main)
C2176 Receiver Error

OBD2 Codes ($03)
P0A80 Replace Hybrid/EV Battery Pack
P3015 Manufacturer Specific

OBD2 Permanent Codes ($0A)
P0A80 Replace Hybrid/EV Battery Pack
P3015 Manufacturer Specific

After a considerable amount of reading here on Prius Chat, I've determined that the fan does have differing speeds, appears dependent on the temp sensor for the battery temp.

Thanks again for your help Brian