jolinc01
Dedicated LVC Member
I have some heat issues with my 01 V8. I think it's the aux pump, but want to test it before I replace it. Any help?
Is there a way to check the aux pump?
- Thread starter jolinc01
- Start date
Quik LS
Dedicated LVC Member
here's a diag. see if it turns on, if not check fuses and connections....
bleeding can effect it alot - since the interior loop is very prone to air pockets...
bleeding can effect it alot - since the interior loop is very prone to air pockets...
jolinc01
Dedicated LVC Member
Thanks Quik. One quick question though. What kind of noise does it make when it turns on? I would assume something like a small electrical motor?
Quik LS
Dedicated LVC Member
it is - you can feel it on, and hear it - although if it is full of coolant, it is very quite.
rt2barbers
Active LVC Member
Aux Pump
I have one.....you're welcome to it. Got it incidentally thrown in with a salvage yard radiator for my '02 LS V-8. Thanks again to LVC contributors.
I have one.....you're welcome to it. Got it incidentally thrown in with a salvage yard radiator for my '02 LS V-8. Thanks again to LVC contributors.
joegr
Dedicated LVC Member
I assume that you meant "quiet?"
joegr
Dedicated LVC Member
If it's not running, check for about 12V at the connector to the pump. Be sure to probe across both pins. Faults with the FEM or wiring can cause the pump not to be powered.
I'd follow the coolant bleeding procedure before checking the pump. Air in the coolant seems to be a much more common issue than a failed aux pump.
I'd follow the coolant bleeding procedure before checking the pump. Air in the coolant seems to be a much more common issue than a failed aux pump.
jolinc01
Dedicated LVC Member
Just an update, my pump was bad. I checked it, and then took it to a local shop to double check. Well $225 later I have more heat than I can handle. It feels good to have HOT heat again. Oh and out of the $225 I spent $175 was the stinking pump.
Justin00LS
Well-Known LVC Member
sorry to bring this post up from the dead.. but I am pretty sure my pump is bad as well and I am currently downstairs doing some troubleshooting on it. Does anyone know if the PCM commands for the pump to turn on any time the engine is running at idle? Or does it command for the pump to turn on after the engine is at full operating temperature? When should I see 12v at the pump?
smdandb2
Active LVC Member
All you guys must be motivated. I saw all the crap I have to pull off to even touch the pump so I just shut the hood.
I am dealing with luke warm air in single digit temps, haha.
joegr
Dedicated LVC Member
The service manual says that you will see 12V at the pump when the engine is running and the climate control is set to 90 degrees. It also gives some tests to verify the relay that controls it and the wiring.
http://deneau.info/ls/s6x~us~en~file=s6xc0003.htm~gen~ref.htm
Scroll down to section I5.
fbird18
Dedicated LVC Member
The auxillary pump is actually pretty easy to get at. The DCCV is the real pain in the arse.
I am starting to suspect my aux pump as well for my lack of hot heat. Replaced the DCCV a couple months ago and had much better heat at idle than before. But I know it isn't as hot as it can be. Bled and rebled the coolant many times, think I might replace that pump after seeing that worked for jolinc01.
Justin00LS
Well-Known LVC Member
Just an update. My aux pump was not bad! For some reason, the climate control system is not sending voltage to the relay to engage it, so the aux pump was not receiving power. For now I have jumped the relay so that the aux pump is on anytime the ignition is on.
And the heat feels great now!
Thanks for everyone's help!
And the heat feels great now!
Thanks for everyone's help!
joegr
Dedicated LVC Member
Just an update. My aux pump was not bad! For some reason, the climate control system is not sending voltage to the relay to engage it, so the aux pump was not receiving power. For now I have jumped the relay so that the aux pump is on anytime the ignition is on.
And the heat feels great now!
Thanks for everyone's help!
It seems like that should be an acceptable permanent solution, unless it causes the pump to wear out too soon.
Justin00LS
Well-Known LVC Member
It may become a permanent solution. I'll leave it like this until summertime and then I will probably disconnect. When it starts to get cold again I will either fix correctly or jumper it like I currently have it.
It will cause the pump to wear out sooner, but how much sooner, I am not sure. I can't imagine it will significantly affect pump life since it is designed to run almost 100% of the time anyway..