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Home >> Toyota >> 1996 >> 4Runner Limited, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests - 3.4L >> Relays >> Circuit Opening Relay

Circuit Opening Relay

  1. Ensure ignition is off. Remove circuit opening relay. See CIRCUIT OPENING RELAY LOCATION  table.
    NOTE: Circuit opening relay may also be identified using appropriate illustration in THEORY/OPERATION - 3.4L article and wire color. See appropriate wiring diagram in WIRING DIAGRAMS article.
    CIRCUIT OPENING RELAY LOCATION

    Application Relay Location
    4Runner Below Lower Right Corner Of Fuse/Relay Box Located Behind Driver's Side Of Instrument Panel, To The Left Of Steering Column
  2. To test circuit opening relay continuity, using ohmmeter, check continuity between specified terminals. See Fig 1 and Fig 2.
  3. To test circuit opening relay operation, apply battery voltage and ground to relay and use ohmmeter to check continuity between specified terminals. See Fig 1 and Fig 2. Replace circuit opening relay if defective.
Fig 1: Testing Circuit Opening Relay & EFI Main Relay - Continuity
G96E09941Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 2: Testing Circuit Opening Relay & EFI Main Relay - Operation
G96G09942Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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