This document discusses troubleshooting electronic resources using interlibrary loan data. It identifies three common problems: data being incomplete or inaccurate, bibliographic metadata and holdings data not being synchronized, and libraries receiving data in multiple formats. It provides examples of each problem, such as dates being inconsistent between sources and targets, metadata being searched incorrectly, and buried open access links. The document suggests using interlibrary loan data to identify and address these issues in order to improve access to electronic resources.