Document and Entity Information (USD $)	12 Months Ended
	Mar. 31, 2013	Sep. 30, 2012
Document And Entity Information
Entity Registrant Name	WNC HOUSING TAX CREDIT FUND IV L P SERIES 2
Entity Central Index Key	0000913497
Document Type	10-K
Document Period End Date	Mar. 31, 2013
Amendment Flag	false
Current Fiscal Year End Date	--03-31
Is Entity a Well-known Seasoned Issuer?	No
Is Entity a Voluntary Filer?	No
Is Entity's Reporting Status Current?	Yes
Entity Filer Category	Non-accelerated Filer
Entity Public Float		$ 0
Entity Common Stock, Shares Outstanding	0
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2013