1992 Toyota Corolla LEFACTORY OEM SERVICE PROCEDURE

Circuit Opening Relay

  1. Ensure ignition is off. Remove circuit opening relay. See CIRCUIT OPENING RELAY LOCATION table. Using ohmmeter, check continuity between specified terminals. See Fig 1 & Fig 2 .
  2. Check circuit opening relay operation by applying battery voltage and checking continuity between specified terminals. See Fig 1 & Fig 2 . Replace circuit opening relay if defective.
NOTE: Circuit opening relay may also be identified by appropriate illustration in THEORY/OPERATION article in the ENGINE PERFORMANCE Section or wire color. See appropriate wiring diagram in WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.
CIRCUIT OPENING RELAY LOCATION

Application Location
Corolla Bottom Center Of Dash, In Front Of Console, Attached To ECU
Fig 1: Testing Circuit Opening Relay - Checking Continuity
G92J27408Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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