Step 6 - Inspect Daytime Running Light Main Relay Circuit
WARNING: This page is about a different car, the 2002 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.
Disconnect the connector from the relay and inspect the connector on the wire harness side.
If circuit is specified, try replacing the relay with a new one. If circuit is not as specified, inspect the circuits connected to other parts.