Bosch 010 IC pump need constant power
09-11-2013, 11:58 AM
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E55 AMG
Bosch 010 IC pump need constant power
Have just bought a new Bosch 010 IC pump. And shall now install it, but I need som guidance with the constant power to the pump. Have read ALL the post on the forum but canīt find a good descripition on how and where to connect + in the fuse box, so the pump starts only by turning the key (ACC).
Can someone show me with pic and/or with a good description? Which relay to use and fuse?
Best regards / M.N
Can someone show me with pic and/or with a good description? Which relay to use and fuse?
Best regards / M.N
09-11-2013, 12:15 PM
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2003 W211 E55, 2003 W220 S600
thick orange wire in the back of the ECU box going to wiper motor is a switched 12v.
if you have a ecu remap the pump can be turned on all the time via that also.
if you have a ecu remap the pump can be turned on all the time via that also.
09-11-2013, 02:38 PM
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2004 E55 (sold) 2012 E350 4M
09-11-2013, 02:50 PM
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There has been a lot of discussions of some people stating with certain year vehicles, the pump is on constant from the factory. Others claim it only comes on when the blower is engaged.
Regardless of what is true on that, to answer your question, the benefit is to keep the water circulating at all times so that is is already cool when the blower engages.
Regardless of what is true on that, to answer your question, the benefit is to keep the water circulating at all times so that is is already cool when the blower engages.
09-11-2013, 03:29 PM
#7
Originally the car was designed for the IC pump to be on all the time, and some later ECU update changed that where it's not always on. Mercedes probably did that to allow the pump to last to 100K or longer, but obviously keeping it on is ideal for performance.
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09-11-2013, 04:26 PM
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09-11-2013, 04:47 PM
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2004 E55,1969 300SEL6.3,2011 ML350 BlueTec Diesel,2005 ML400 CDI
Watching my IAT, I can confirm that the pump is temperature controlled by the ECU. If the car has been parked and heat soaked, the pump engages as soon as the engine starts and the IAT starts to come down. If you want to confirm this, put your hand on the HE before starting a heat soaked engine. It should be cool to the touch. After starting the engine, put your hand on the HE and you will note that it is now quite warm as the coolant is circulating. There will not be too much cooling until there is air flow through the HE.
