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Cooling Fan Relay No. 1

WARNING: This page is about a different car, the 2003 Toyota Prius and 2002 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect negative battery cable. Remove cooling fan relay No. 1 from fuse/relay box. See COMPONENT LOCATIONS . Using an ohmmeter, check for continuity between relay terminals No. 1 and 2. See Figure. If there is no continuity, replace relay. Check that no continuity exists between relay terminals No. 3 and 5. If continuity exists, replace relay.
  2. To check relay operation, connect positive battery voltage to terminal No. 1 and ground to terminal No. 2. Check for continuity between relay terminals No. 3 and 5. If no continuity exists, replace relay. Reinstall cooling fan relay No. 1.
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