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Circuit Opening Relay: Inspection

  1. REMOVE RELAY BOX COVER 
  2. REMOVE CIRCUIT OPENING RELAY (Marking: C/OPN) 
    Fig 1: Identifying Circuit Opening Relay
    G00920353Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSPECT CIRCUIT OPENING RELAY CONTINUITY 
    1. Using an ohmmeter, check that there is a continuity between terminal 1 and 2.

      If there is no continuity, replace the relay.

    2. Check that there is no continuity between terminals 3 and 5.

      If there is a continuity, replace the relay.

    Fig 2: Checking Circuit Opening Relay Continuity
    G00920354Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. INSPECT CIRCUIT OPENING RELAY OPERATION 
    1. Apply the battery positive voltage across terminal 1 and 2.
    2. Using an ohmmeter, check that there is a continuity between terminal 3 and 5.

      If there is no continuity, replace the relay.

    Fig 3: Checking Circuit Opening Relay Operation
    G00920355Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. REINSTALL CIRCUIT OPENING RELAY 
  6. REINSTALL RELAY BOX COVER 
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