Heater support pump bocked

[Lukefx]

So whilst fixing one issue another one pops up!
Supposed to be doing a longish drive at the weekend, but not sure now.
Can anyone advise please, what does it heat, support and pump?!
Thanks.

 

[Dellmassive]

Secondary engine coolant pump?

Rear HVAC heater pump?

What's the van spec?... Vel with rear heating?

 

[Dellmassive]

Intercooler water pump....

J

Thread 'Auxiliary coolant pump fault for intercooler'

16 Apr 2024

VW transporter, 2017 T6/T30 TDI high line LWB.

Hi! I’m hoping someone can help me. I have the above van. The auxiliary pump that operates the coolant supply to the intercooler is not working. All the pumps have been replaced. When the ignition is turned on initially the pump powers up but immediately goes off again. We have tried replacing the pumps, we have replaced the connector plug and still the fault exists…
Any ideas?

• JIMMYGOLF8
• Replies: 12
• Forum: Electrics, Lighting, ICE, Security

 

[Lukefx]

Thanks Dell. It's a 2016 T6 150 Shuttle with a reat HVAC.
So by the sounds of it it relates to a few possible pumps.

 

[Dellmassive]

The post above seems to relate to the support pump in the engine bay for the charge cooler.

The rear HVAC was just a guess.

But it's shown as a fault on the engine ECU and not the HVAC ECU...... So it will be the front support pump..... Have you been loosing coolant?

Though a vcds scan will get you a better Indication.

Your code looks like a carista screenshot?

 

[Lukefx]

The post above seems to relate to the support pump in the engine bay for the charge cooler.

The rear HVAC was just a guess.

But it's shown as a fault on the engine ECU and not the HVAC ECU...... So it will be the front support pump..... Have you been loosing coolant?

Though a vcds scan will get you a better Indication.

Your code looks like a carista screenshot?

Yeah I thought that too, engine ecu and not HVAC.
But not loosing coolant and not running any differently, not that I've noticed anyway. The engine light came on and then I scanned it and yes, Carista.
I'll get it scanned properly.
Thanks again.

 

[Dan363]

Did you get this sorted, now have the same code... from what i can find its to pump under the air intake rear left of the engine that helps circulate coolent to the cabin heater matrix.. managed to unplug it at code the open circuit message..