Secondary air pump not engaging in my 2004 vw jetta gls

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Jan 5, 2020
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#1
Make
Volkswagen
Model
Jetta gls 2.0 liter
Year
2094
Miles
90000
Engine
L4 2.0l mfi avh sohc
I've replaced the secondary air pump tested air pump from relay jumped negative side of relay coil to ground and it works while engine is running. The air pump will not come on under normal start /running conditions.could it be a possible sensor (like temp sensor). Any one have any ideas?
 

grcauto

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May 29, 2014
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#2
What are the required conditions and are they being met?