Major Prius Malfunction; Coolant Pumps?

Prakash · 06-28-2007, 01:46 AM

Howdy Everyone,

I was wondering if any one can help me out with the following problem. I got the following warning indicators (pictures down below) just yesterday. As the warning indicators came on, almost simultaneously the air/conditioning would no longer cool, in other words it was coming out hot on 69*F.

In addition, the vehicle has already been to the local Toyota dealership, where they informed me that they had ordered a pump. What I understood was that it was some sort of a coolant pump. I also know that the Thermos, or the Hot Coolant storage tank was replaced some time ago, however I believe it was properly bled at the time.

In end, Toyota had indicated that I need two new pumps which have been ordered (well one was already installed). But their lack of effective communication has left me somewhat in the dark about the problem, until the part arrives.

In my mind- the vehicle seems to be overheating because the a/c occasionally ceases to cool, while at the same time the following warning indicators (down below) come on. The ICE & E-motor seem a bit hot, and at some point It almost appeared to be loosing power, although not really because the only indicator of this was a sort of fading in the indicator lights, including the clock. But this was only once, when it seemed to be getting quite hot earlier today.

Any ideas on the prognosis? I know my description is vague and unclear, but perhaps someone might have a hunch as to what the problem may be.

I will post back with the exact names of the pumps that were ordered for my Prius.

Prakash · 06-28-2007, 03:05 AM

Notice the temp. outside @ 81F, damn and I took that at about 1am'ish. That's South Texas for you, alright.

Prakash · 06-28-2007, 07:56 AM

Any ideas?

Prakash · 06-28-2007, 03:45 PM

No clues

?

**efusco** · 06-28-2007, 03:48 PM

You know, there's really not enough clear info to make good guesses...I think you would know something definative from the dealer soon, no?

In any case, if the coolant pumps are bad then my first guess would be that one of them crapped out completely...I think that would be the simplest way to explain everything.

jrmgkia · 06-29-2007, 04:19 AM

Judging by the lack of replies I am guessing you are the first to experience this problem, I am really interested to know what the problem turns out to be, please keep us posted. Thanks

galaxee · 06-29-2007, 10:31 AM

sorry, our nights have been crazy busy here- anniversary, car project, big toyota dinner, and more car project this weekend. if DH makes it home awake i will ask him.

galaxee · 06-29-2007, 10:22 PM

Quote:

I need two new pumps which have been ordered (well one was already installed)[/b]

something about this sounds fishy... sounds like they installed one, but that didn't fix it (wrong one i suppose), and now they're going to backtrack and say that both were bad... what codes are they basing this on?

is this warranty or out of pocket?

hobbit · 06-29-2007, 11:11 PM

*two* coolant pumps? That sounds like "change more parts to be
surer of fixing the problem", i.e. what galaxee said. Make them
do and report a pintpoint diagnosis. And what's this with "fading
clock"? Now it sounds like 12V battery trouble on top of everything
else, unless maybe the DC/DC converter got too hot and shut down.
[hmm, where have we seen burnt dc/dc converter partz before??]
.
_H*

Prakash · 06-30-2007, 06:24 AM

What I understand now is that it was/is the Water pump (or the pump for the inverter coolant loop) that needed replacement on the Prius. Which leads me to believe that either A. They don't last past 88k, or B. It's just way too hot down in South Texas with averages of 100F+ including now or C. it had something to do with the incident that ruined and caused the replacement of my Hot Coolant Storage tank earlier this year.. and perhaps it was not bled properly. Nonetheless I am just making uneducated (concerning the matter at hand) speculations... .

However, my tech indicated that he still needed to bleed it some more, I assumed this was referring to the Hot Coolant tank, but I will inquire into that tomorrow.

My hopes are that no parts were damaged as a result of the overheating, such as surrounding parts, or the major components themselves. Although my tech did not indicate this.

Warranty is covering this, which of coarse is the positive side of this ordeal, nonetheless I see it as common courtesy on their part. I am not all that far from 90,000 on this Prius, But I got it at 30,000 last year. Damn those trips to the midwest! I will have to make these last 10,000 miles last as to really savor what still remains of my Warranty.

I suppose the question I seek to pose is whether or not any one has experienced any problems with their water pumps or Inverter coolant pump? I actually did some research on this post, and found a select few that needed all kinds of pump replacements much sooner than I did, practically when there vehicles were still quite new. So I suppose from that angle of comparison I should consider myself lucky to have had the problem after 88,000 as opposed to the fellow who had the problem at 20,000 (Screaming Coolant Pump Post)

But as a owner of 2004 Prius I assume that I should at some point come to expect to have a number of problems as the 04 is the first of the second generation vehicles... Blah. I am nearly at 100,000 miles and EVERYTHING else seems to be working great. My battery still charges to the last green bar, and its performance has only seemed to have gotten better. The ICE sounds fine, MFD screen still makes a great LCD screen for dvds at rest areas, brakes are still good it seems because of the regen. brakes, all recalls have been performed which is quite a lot of them for an 04.

Here's to healthy pumps!

And thanks for all your help folks.

actually i plugged in a OBD2 and I think i remember getting the code P0093 if I am correct. Not sure which codes they got with their OBD software...which i read somewhere could be a fuel system leak, although i think this is unlikely.

06-28-2007, 01:46 AM	#1
Prakash Member Join Date: Mar 2006 Posts: 78 My Car: Model: Package: Thanks: 0 Thanked 0 Times in 0 Posts Friends: 0	Howdy Everyone, I was wondering if any one can help me out with the following problem. I got the following warning indicators (pictures down below) just yesterday. As the warning indicators came on, almost simultaneously the air/conditioning would no longer cool, in other words it was coming out hot on 69*F. In addition, the vehicle has already been to the local Toyota dealership, where they informed me that they had ordered a pump. What I understood was that it was some sort of a coolant pump. I also know that the Thermos, or the Hot Coolant storage tank was replaced some time ago, however I believe it was properly bled at the time. In end, Toyota had indicated that I need two new pumps which have been ordered (well one was already installed). But their lack of effective communication has left me somewhat in the dark about the problem, until the part arrives. In my mind- the vehicle seems to be overheating because the a/c occasionally ceases to cool, while at the same time the following warning indicators (down below) come on. The ICE & E-motor seem a bit hot, and at some point It almost appeared to be loosing power, although not really because the only indicator of this was a sort of fading in the indicator lights, including the clock. But this was only once, when it seemed to be getting quite hot earlier today. Any ideas on the prognosis? I know my description is vague and unclear, but perhaps someone might have a hunch as to what the problem may be. I will post back with the exact names of the pumps that were ordered for my Prius. Attached Thumbnails __________________ -Prius 2004 -Driftwood Pearl -Package #4 -S-Type Seat Covers -Sirius Sat. Radio -Coastal Tech's Ultimate LockPick 1 -Toyota Previa 1995 -Cadet Blue Metallic -4cyl. - Super Charged "In the desert, you can't remember your name 'Cause there ain't no one for to give you no pain. La, La ...."

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06-28-2007, 03:05 AM	#2
Prakash Member Join Date: Mar 2006 Posts: 78 My Car: Model: Package: Thanks: 0 Thanked 0 Times in 0 Posts Friends: 0	Notice the temp. outside @ 81F, damn and I took that at about 1am'ish. That's South Texas for you, alright.

06-28-2007, 07:56 AM	#3
Prakash Member Join Date: Mar 2006 Posts: 78 My Car: Model: Package: Thanks: 0 Thanked 0 Times in 0 Posts Friends: 0	Any ideas?

06-28-2007, 03:45 PM	#4
Prakash Member Join Date: Mar 2006 Posts: 78 My Car: Model: Package: Thanks: 0 Thanked 0 Times in 0 Posts Friends: 0	No clues ?

06-28-2007, 03:48 PM	#5
efusco Troll Slayer Join Date: Nov 2003 Location: Nixa, MO Posts: 17,231 My Car: 2004 Prius Model: Package: #9 Thanks: 49 Thanked 249 Times in 148 Posts Friends: 37	You know, there's really not enough clear info to make good guesses...I think you would know something definative from the dealer soon, no? In any case, if the coolant pumps are bad then my first guess would be that one of them crapped out completely...I think that would be the simplest way to explain everything.

06-29-2007, 04:19 AM	#6
jrmgkia Wish I was cycling Join Date: Mar 2004 Location: Campbell, CA Posts: 51 My Car: 2004 Prius Model: Package: #4 Thanks: 5 Thanked 5 Times in 5 Posts Friends: 0	Judging by the lack of replies I am guessing you are the first to experience this problem, I am really interested to know what the problem turns out to be, please keep us posted. Thanks

06-29-2007, 10:31 AM	#7
galaxee resident lab rat Join Date: Mar 2005 Location: boilermaker territory Posts: 9,675 My Car: 2005 Prius Model: N/A Package: #5 Thanks: 0 Thanked 94 Times in 37 Posts Friends: 26	sorry, our nights have been crazy busy here- anniversary, car project, big toyota dinner, and more car project this weekend. if DH makes it home awake i will ask him.

06-29-2007, 11:11 PM	#9
hobbit Senior Member Join Date: Mar 2005 Location: Bahstahn Posts: 3,625 My Car: Model: Package: Thanks: 0 Thanked 216 Times in 118 Posts Friends: 0	two coolant pumps? That sounds like "change more parts to be surer of fixing the problem", i.e. what galaxee said. Make them do and report a pintpoint diagnosis. And what's this with "fading clock"? Now it sounds like 12V battery trouble on top of everything else, unless maybe the DC/DC converter got too hot and shut down. [hmm, where have we seen burnt dc/dc converter partz before??] . _H*

06-30-2007, 06:24 AM	#10
Prakash Member Join Date: Mar 2006 Posts: 78 My Car: Model: Package: Thanks: 0 Thanked 0 Times in 0 Posts Friends: 0	What I understand now is that it was/is the Water pump (or the pump for the inverter coolant loop) that needed replacement on the Prius. Which leads me to believe that either A. They don't last past 88k, or B. It's just way too hot down in South Texas with averages of 100F+ including now or C. it had something to do with the incident that ruined and caused the replacement of my Hot Coolant Storage tank earlier this year.. and perhaps it was not bled properly. Nonetheless I am just making uneducated (concerning the matter at hand) speculations... . However, my tech indicated that he still needed to bleed it some more, I assumed this was referring to the Hot Coolant tank, but I will inquire into that tomorrow. My hopes are that no parts were damaged as a result of the overheating, such as surrounding parts, or the major components themselves. Although my tech did not indicate this. Warranty is covering this, which of coarse is the positive side of this ordeal, nonetheless I see it as common courtesy on their part. I am not all that far from 90,000 on this Prius, But I got it at 30,000 last year. Damn those trips to the midwest! I will have to make these last 10,000 miles last as to really savor what still remains of my Warranty. I suppose the question I seek to pose is whether or not any one has experienced any problems with their water pumps or Inverter coolant pump? I actually did some research on this post, and found a select few that needed all kinds of pump replacements much sooner than I did, practically when there vehicles were still quite new. So I suppose from that angle of comparison I should consider myself lucky to have had the problem after 88,000 as opposed to the fellow who had the problem at 20,000 (Screaming Coolant Pump Post) But as a owner of 2004 Prius I assume that I should at some point come to expect to have a number of problems as the 04 is the first of the second generation vehicles... Blah. I am nearly at 100,000 miles and EVERYTHING else seems to be working great. My battery still charges to the last green bar, and its performance has only seemed to have gotten better. The ICE sounds fine, MFD screen still makes a great LCD screen for dvds at rest areas, brakes are still good it seems because of the regen. brakes, all recalls have been performed which is quite a lot of them for an 04. Here's to healthy pumps! And thanks for all your help folks. actually i plugged in a OBD2 and I think i remember getting the code P0093 if I am correct. Not sure which codes they got with their OBD software...which i read somewhere could be a fuel system leak, although i think this is unlikely.