Code P3000 and P0A84

The fan is to the right side of the trunk behind the plastic trim.

I would definitely take it to the hybrid specialist. Taking a hybrid to a regular mechanic is usually a mistake unless they are honest enough to admit when they dont know what they're doing, even the toyota dealer will try to sell you any service without knowing for sure what it actually needs.

 

Who is the hybrid battery guy? My vote is to take it to him if you can’t do it yourself. The Dealer would cost a lot.

 

I would take it to a local mechanic only if he has hybrid experience. The engine is one thing, the hybrid system is another critter.

 

P0A84: Hybrid Battery Pack Cooling Fan 1 Control Circuit Low
Trouble Area:
Wire Harness or connector
BATT FAN fuse
Battery blower relay #1
Battery blower assembly
Quarter Vent duct (blower motor controller)
Battery ECU

The cooling fan is located behind the interior trim panel on passenger side of trunk.
The battery ECU is located in the HV battery pack, in the electronics section on the drivers side of the HV battery.

It sounds like the dealer may have already done some troubleshooting, but I wouldn't guarantee it.
I have heard there is sometimes corrosion problems in the electrical plugs near the fan.

 

Here is the workup for DTC P0A84 and P0A85 : http://ww2.justanswer.com/uploads/skyvisions/2008-06-21_094224_05_prius2.pdf

It would be helpful to have the INF (subcode) for that P3000. Here are the workups for the five (5) possible INFs here :

Workup for DTC P3000 with INFs 123 / 125 / 603 : https://share.qclt.com/%E4%B8%B0%E7%94%B0%E6%99%AE%E7%91%9E%E6%96%AF%E5%8E%9F%E5%8E%82%E8%8B%B1%E6%96%87%E6%89%8B%E5%86%8Cpdf%E6%A0%BC%E5%BC%8F/repair%20manual/04pruisr/05/21bpm/3000123.pdf

Workup for DTC P3000 with INF 388 : https://share.qclt.com/%E4%B8%B0%E7%94%B0%E6%99%AE%E7%91%9E%E6%96%AF%E5%8E%9F%E5%8E%82%E8%8B%B1%E6%96%87%E6%89%8B%E5%86%8Cpdf%E6%A0%BC%E5%BC%8F/repair%20manual/04pruisr/05/21bpm/3000388.pdf

Workup for DTC P3000 with INF 389 : https://share.qclt.com/%E4%B8%B0%E7%94%B0%E6%99%AE%E7%91%9E%E6%96%AF%E5%8E%9F%E5%8E%82%E8%8B%B1%E6%96%87%E6%89%8B%E5%86%8Cpdf%E6%A0%BC%E5%BC%8F/repair%20manual/04pruisr/05/21bpm/3000389.pdf

Having the INF would make the job easier, though like @TMR-JWAP said, cleaning the fan and checking the fan connector isn't that difficult.

Maybe a fuse is blown?

 

I gotta say, I collect old pinball and arcade machines. “It’s a fuse” is a joke among us.

 

Easier than checking the HV fan connector, and the first step in the workup for DTC P0A84 :

INSPECTION PROCEDURE 1
CHECK FUSE(BATT FAN 10 A)
(a) Remove the BATT FAN fuse from the engine room R/B.
(b) Check the resistance in the BATT FAN fuse. Standard: Below 1Ω
(c) Reinstall the BATT FAN fuse.

Now I'm curious if it might be a flip-flop switch ?

 

Not ment to be disrespectful Amigo. “It’s a fuse” just made me laugh. Among video game collectors it’s the number one excuse why a video game doesn’t work.

And it’s almost always not the reason the video game doesn’t work. That’s the joke.

 

None taken Had I included a random emoji, my reply might've came off differently

 

Emojis can be your friend.

Better than random meme’s too.

 

Is there a code reading app that you recommend? I have the Veepeak OBDii reader and tried Dr. Prius app but doesn't seem to be to helpful justs spits out P3000 on INF's.

Thanks!

 

Not sure if any of the apps offer INFs, but please report back if you find one that does.

You will need a mini-vci cable and a copy of techstream.

 

Since i've bought this car (like 2 months ago), i got exactly same errors (P3000 and P0A84) about once per week or two.

With friend of mine, we checked fan (it was clean) and connectors (no corrosion at all).

I always clear the errors, but they coming back after some time.

Car is working normally, i checked twice temperature of the battery just a while after codes appeared, once it was about 35 °C, another time 45 °C, so i'm assuming fan is working normally.

I wanted to try change fuse, but there are some tiny fuses, which i realized after i bought some different ones (i will try to get right ones).

Anyway, what else could cause this problem?

I already ordered VXDiag VCX Nano (it should arrive soon), does it help me get those INF codes?

Also, weird is, last time this error occured, was when i fully refueled the car, turned it on and red triangle with yellow exclamation mark and VSC was on.

But i guess it was just coincidence, right?

As well is interesting, when i do not clear the codes, so next day only red triangle stays, but yellow exclamation and VSC disappears.

 

DTC | P0A84 | Hybrid Battery Pack Cooling Fan 1 Control Circuit Low

DESCRIPTION
The blower motor controller regulates the voltage of the battery blower. The blower motor controller has fins made of aluminum. The exhaust air from the HV battery assembly that flows through the quarter vent duct cools the blower motor controller, which is installed in the quarter vent duct.

The current flows from the FCTL1 terminal of the battery ECU to the relay coil of the No. 1 battery blower relay and as the contact point of the relay closes, the power is supplied to the battery blower.

When a fan actuation signal is transmitted from the battery ECU, the blower motor controller adjusts voltage (VM) which is applied to the battery blower in order to get the requested fan speed. The adjusted voltage is also transmitted to the VM terminal of the battery ECU in the form of a monitoring signal. The blower motor controller corrects the voltage at the blower motor by monitoring the voltage at the +B terminal of the battery blower.

	DTC No.	DTC Detection Condition	Trouble Area
1	P0A84	Battery blower voltage is lower than the malfunction threshold at a constant vehicle speed	Wire harness or connector BATT FAN fuse No. 1 battery blower relay Battery blower Quarter vent duct (battery blower motor controller) Battery ECU

Attached is the full inspection procedure for the P0A84

[EDIT] Added procedure to check the battery blower motor controller (page HB- 159) referred to on page HB–55 of the above procedure.

 

2 years later...I finally got Techstream up and running! And it seems that the fan is dead, or the cable really corroded somewhere, I will have to solve it, however, last year according to Hybrid Assistant the fan was still spinning, but now it is not...

 

Pull the interior panel on the right side of the cargo area. There is an electrical connector above the battery fan that often gets wet and corrodes. The water usually originates from cracks in the body seam sealer along the sides of the tailgate opening- around the lift strut mounts on the body- extending up to the rain gutter channels on the roof.

Posted via the PriusChat mobile app.

 

Today I checked it and I didn't find any visible corrosion (only the end of the black cable looked a bit worse than the others), to be sure I sprayed it with contact cleaner spray, I cleaned the fan (it wasn't even too dirty), I lubricated the bearing from under the sticker of the fan, I replaced Batt Fan fuse again (I changed it last year already) and the fan is still dead.

When I test it in Techstream at speeds 0-6 (speed 1 or more throws an error), VMF Fan Motor Voltage is always 0.0, at any speed, it means that the fan is dead and i should start looking for a new one, or it would show voltage anyway and the error is elsewhere?

 

Also, when i switch speed of fan from 0 to 1, i always hear some click from fan area (i guess relay?), does it indicate something?

 

The cooling air exit duct (large black plastic duct connected at bottom of battery case) has a control module installed on the side between the duct and car body. That module controls the fan. There is a relay mounted to the car body just above the plastic ducts. IIRC, that is the fan relay. Make sure the module is plugged in to its harness. Pretty sure it's exactly the same as the module that controls the dash board ventilation fan.