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Easiest way to implement Electric water pump run on after ignition off


Dannobre
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You will need to wire the ECU as per the "ECU hold power" wiring diagram in the help file.  The ECU can then be set to "stay alive" for a pre-set length of time.  It will always stay alive for this pre-set time regardless of whether your EWP needs to run or not.  The ECU uses very little current so shouldnt drain battery etc.  The maximum keep alive time setting is 1310 seconds or about 20minutes.

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2 hours ago, Adamw said:

You will need to wire the ECU as per the "ECU hold power" wiring diagram in the help file.  The ECU can then be set to "stay alive" for a pre-set length of time.  It will always stay alive for this pre-set time regardless of whether your EWP needs to run or not.  The ECU uses very little current so shouldnt drain battery etc.  The maximum keep alive time setting is 1310 seconds or about 20minutes.

Can the EWP then be configured to run until a set temp as long as the ECU is still alive?  IE:   If it reaches the EWP off temp before the ECU Hold time expires it will go off.  Otherwise it will shut everything down at the ECU Hold time?

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5 hours ago, Dannobre said:

Can the EWP then be configured to run until a set temp as long as the ECU is still alive?  IE:   If it reaches the EWP off temp before the ECU Hold time expires it will go off.  Otherwise it will shut everything down at the ECU Hold time?

Yes. That is how i've set mine up.

 

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