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Home >> Lexus >> 2002 >> IS 300 Base, Standard >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Electric Cooling Fans (Diagnostics) >> Component Tests >> Cooling Fan Relays >> Cooling Fan Relay No. 1

Cooling Fan Relay No. 1

  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, and No. 3 and 4. See Figure. If no continuity exists, replace relay.
  2. To check relay operation, connect positive battery voltage to terminal No. 1 and ground to terminal No. 2. Check that no continuity exists between relay terminals No. 3 and 4. If continuity exists, replace relay. Reinstall cooling fan relay No. 1.
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