1998 Lexus SC 400FACTORY OEM SERVICE PROCEDURE

Timing Oil Control Valve Operation

Remove oil control valve. Connect a fused jumper wire between battery voltage and terminal No. 1 of oil control valve. See Fig 1. Connector a second fused jumper wire between ground and terminal No. 2 of oil control valve. Spindle should move away from oil control valve connector. Remove battery voltage from connector. Spindle should move towards oil control valve connector. If oil control valve operation is not as specified, replace oil control valve.

Fig 1: Testing Camshaft Timing Oil Control Valve
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

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