Husband /Wife 5500EZs

Husband and Wife each have their own 401(k). They are a controlled group do to minor child . In completing their Ezs, the participant count should be 2 since the other spouse is eligible to defer but I do not combine the assets since they are separate pools. Correct?

Correct. 

Simply being a controlled group does not automatically make them eligible to defer in each other's plans. They would each have had to adopt the other's plan in writing. If that is the case, then I agree.

4 minutes ago, C. B. Zeller said:

Simply being a controlled group does not automatically make them eligible to defer in each other's plans. They would each have had to adopt the other's plan in writing. If that is the case, then I agree.

Not necessarily. It depends on plan language. The OP stated it as a fact. If it is not a fact the answer changes. 

they are standardized prototype plans so I believe the employer definition automatically sweeps the other spouse into their respective plans on a coverage basis...

1 hour ago, draper1 said:

they are standardized prototype plans so I believe the employer definition automatically sweeps the other spouse into their respective plans on a coverage basis...

Why?

There seem to be two different parts to that statement. 

1. Are related employers ( Control group, ASG) automatically part of a plan, or is an affirmative participating employer election by the entity required?
The document (a volume submitter) we use says Not automatically part of the plan, affirmative election is required. I have seen documents default the other way too, but unless you've read that part of the document, don't assume. 

2. Pulling in another employer due to coverage? Is there a coverage failure? The spouse's are HCE, so I don't see why it would be necessary to pull in another HCE due to a testing failure on a 401(k) plan. These aren't DB plans with minimum participation under 401(a)(26).  Even if there is a coverage failure, not all plan documents default to a fail safe that automatically pulls in extra employees to give them benefits.