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Heater Main Relay: Inspection

WARNING: This page is about a different car, the 2005 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.
  1. REMOVE HEATER MAIN RELAY 

    Remove the heater main relay.

    Fig 1: Identifying Location Of Heater Main Relay
    G02987315Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSPECT HEATER MAIN RELAY CONTINUITY 
    HEATER MAIN RELAY CONTINUITY

    Condition Tester connection Specified condition
    Constant 1 - 2; 3 - 4 Continuity
    Apply B+ between terminals 1 and 2. 3 - 5 Continuity
    Fig 2: Identifying Heater Main Relay Terminals
    G02987316Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If continuity is not as specified, replace the relay.

  3. INSTALL HEATER MAIN RELAY 
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